A municipality’s master plan is intended to set the vision and start the process of crafting the future of the municipality in regard to several elements, housing, history, culture, open space, transportation, finance, etc. Arlington began a very public discussion about these issues and the development of the Master Plan in 2012. In 2015, after thorough community wide discussion, the Master Plan was adopted by Town Meeting. This year, 2019, the focus is on passing Articles that will amend the current zoning bylaws in order to implement the housing vision that was approved in 2015.
Related articles
(DRAFT – 7/11/2019)
Overview

Arlington Planning Department officials report on options for the Town to mitigate the effects of housing demolitions and housing replacements in neighborhoods.
Evidence suggests that lack of appropriate regulatory policies have led to incidences of “mcmansions” and other issues that concern neighborhood residents. This study looks at the data, the policy and regulatory options for Arlington. It also looks at how comparable nearby communities have managed similar circumstances.
This 42 page report covers a great deal of data and analysis of homes by zoning district, gaps in the effectiveness of the current regulatory structure, affects on affordability in Arlington by zoning district, information on housing prices and sales, etc.
“Best practices” include descriptions of demolition delay, expansion of local historic districts, neighborhood conservation districts, design review standards and guidelines and possible revisions to the regulatory framework in Arlington. The report also includes interesting case examples of how comparable communities near Arlington handle these issues.
This report was presented to the Arlington Select Board on July 22.
Read the complete report and see the available data and tables.
In 2015 Town Meeting approved the Master Plan. Following is the Housing chapter of that plan. It contains a great deal of information about details of the housing situation in Arlington, challenges of housing price increases, needs for specialty housing, opportunities for meeting these needs, etc. The authors found that “most cities and towns around Arlington experienced a significant rise in housing values from 2000 to 2010. A 40 percent increase in the median value was fairly common. However, Arlington experienced more dramatic growth in housing values than any community in the immediate area, except Somerville. In fact, Arlington’s home values almost doubled.” This and related data helps explain why the need for affordable housing is now so acute.
Massachusetts’ 2020 Economic Development Bill included a set of housing choice provisions: these require communities served by the MBTA to provide a district of reasonable size where multi-family housing is allowed by right. The law gives us significant flexibility to design a district that best suits our needs, but the district must allow housing suitable for families with children, without age restrictions, and at a rate of at least 15 dwelling units per acre. Arlington is one of 175 MBTA communities in Massachusetts that share in the responsibility for meeting these requirements.

The law requires a “district of reasonable size”, but what does that mean? Throughout much of 2021 the Massachusetts Department of Housing and Community Development (DHCD) worked on a set of supporting regulations that set the district requirements according to the type of transit service a community has, the number of existing homes in the community (as of the 2020 Census), and the amount of developable land near transit stations. The specifics vary by community, but here is what the requirements mean for Arlington:
- Our district needs a capacity of (at least) 2,046 homes. This isn’t a requirement to build 2,046 additional homes; instead, it reflects the total number of homes that district might contain in the future. For example, if a parcel with a two-family home were rezoned to allow a three-family home, that single parcel would have a capacity of three.
- Our district needs to allow multi-family housing by right. “By right” means that the development only requires a building permit, where the Building Inspector determines whether the project complies with zoning and building codes. While Arlington allows multi-family housing (three or more dwellings on a single parcel) in some areas, such projects are not allowed by right.
- Our district needs to allow (at least) 15 dwellings/acre. This is more or less in line with the density of the streetcar suburbs that were built in East Arlington during the 1920s. Although portions of Arlington likely meet the density requirement, none of these areas currently comply, as they don’t allow multi-family housing to be built by right.
- Our district needs to be at least 32 acres, but it could be larger. We have flexibility here, as we’ll discuss in a moment.
- Finally, due to the lack of developable land around the Alewife T station, Arlington is free to locate its multi-family district (or districts) anywhere in town. We’re not tied to any particular geographic location.
The new law’s requirements provide Arlington with a great deal of flexibility. We’re free to place our district (or districts) anywhere in town, and we’ll be able to choose from a variety of options as long as they meet the requirements set forth above. For example, providing the capacity of 2,046 homes in the minimum district size of 32 acres would give us a density of 64 dwellings/acre; roughly the scale of mid-rise apartment buildings. On the other hand, if we went with the minimum density of 15 dwellings/acre, we’d have a 135 acre district that allowed smaller multi-family homes. Our district can be anywhere within this range; we also have the option of having multiple districts, with smaller multi-family buildings in some areas of town and larger multi-family buildings in others.
Arlington has a track record of producing thorough and comprehensive planning documents, such as our Master Plan, Net Zero Action Plan, Sustainable Transportation Plan, and Housing Production Plan. These plans contain plenty of building blocks that could be used to formulate a compliant multi-family district. Viewed in that light, the MBTA community requirements are an opportunity to meet some of the goals we’ve already set for ourselves; we just have to go about it in a way that satisfies the law’s new requirements.
Arlington has one unique consideration, which doesn’t apply to most MBTA communities. In 2020, Arlington’s Town Meeting sent a home rule petition to the state legislature, asking for permission to regulate the use of fossil fuels in new building construction; it’s an important component of our plan to become carbon-neutral by 2050. A number of other communities in the Commonwealth filed similar petitions, and the legislature responded by establishing a pilot program: ten cities and towns will be allowed to enact “fossil fuel bans”, but only if they (a) have 10% subsidized housing, (b) achieve safe harbor via compliances with an approved housing production plan, or (c) establish a multi-family district of reasonable size by February 2024. Arlington doesn’t meet the subsidized housing requirement (only 6.54% of our homes are on the subsidized housing inventory), and we’re unlikely to gain safe harbor status during the next year; our most viable path to participation hinges on meeting the multi-family requirements.
In summary, the multi-family requirement for MBTA communities creates new requirements for Arlington, while also presenting us with new opportunities: the opportunity to meet planning goals, the opportunity to meet sustainability goals (e.g., by regulating fossil fuel use in new construction), and the opportunity to reimagine how we do multi-family housing in Arlington as our town moves forward into the twenty-first century.
by Annie LaCourt
One of the concerns people have about the current MBTA Communities zoning proposal is the effect that the increase in housing will have on the town’s budget. Will the need for new services make demands on our budget we cannot meet without more frequent overrides? Or will the new tax revenues from the new buildings cover the cost of that increase in services?
The simple answers to these questions are
- No: It will not make unmanageable demands on the budget; and
- Yes: the new tax revenue from the multi-family housing anticipated will cover the costs of any new services required.
Adopting the current MBTA Communities zoning proposal may even slow the growth of our structural deficit, as I will show in more detail using as examples some of the more recent multi-family projects that have been built in Arlington.
How Does Our Budget Work and What is the Structural Deficit?
First, some basic facts about finance in Arlington: Like every other community in Massachusetts, Arlington’s property tax increases are limited by Proposition 2.5 to 2.5% of the levy limit each year. What is the levy limit? It’s all of the taxes we are allowed to collect across the whole town, without getting specific approval from the Town’s voters. For FY 23 the levy limit is $135,136,908. $3,271,996 of that is the 2.5% increase we are allowed under the law. But also added to that is $1,202,059 of new growth, which comes from properties whose assessment changed because they were substantially improved–either renovated or by increasing capacity. When we reassess a property that has a new house or building on it, we are allowed to add the new taxes generated by the change in value of the property to the levy limit.
Property taxes make up approximately 75% of the town’s revenue. So – except for new growth – that means that the bulk of our budget can only grow 2.5% a year. Other categories of income like State Aid have a much less reliable growth pattern. If the state has a bad fiscal year, our state aid is likely to remain flat or decrease.
Expenses
On the expense side, our default is a budget to maintain the same level of services year to year. We cap increases in the budgets of town departments by 3.25% and the school budget by 3.5%, save for special education costs which are capped slightly higher.
We also have several major categories of expense that are beyond our control that increase at a greater rate than 2.5%. These include, among other things, funding our pension obligations, health insurance costs and our trash collection contract.
Structural Deficit
This difference between the increase in revenues and the increase in costs is the structural deficit. It’s structural because we can’t cut our way out of it without curtailing services severely and we can’t stop paying for things like pensions and insurance that are contractual obligations.
The question of how MBTA communities zoning will affect this is crucial. So let’s take a deeper dive, first on revenue and then on expenses.
How Will MBTA Communities Affect New Growth?
How MBTA-C zoning will affect new growth depends on what gets built and at what rate. Let’s consider some real world examples:
882 Mass Ave. used to be a single story commercial building. It was assessed at $938,000 and the owner paid approximately $9,887 in taxes annually. It has been rebuilt as a mixed use building with commercial space on the ground level and 22 apartments on 4 floors above. The new assessment is approximately $4,800,000 and the new tax bill is about $54,000.00. That means $45,000 in new growth – new property taxes that will grow at the rate of 2.5% in subsequent years.
Another example is 117 Broadway. The building that used to be at that address was entirely commercial, assessed at $1,050,000 and paid around $11,770 in taxes annually. After being rebuilt as mixed use by the Housing Corporation of Arlington, it is assessed at $3,900,000 and taxed at $43,719. 117 Broadway has commercial on the ground floor and 4 stories of affordable housing above. The new growth for this example is approximately $30,000.
What these examples show, and our assessor believes is a pattern, is that a new mixed use or multi-family building increases the taxes we can collect by as much as 400%, depending on the kinds of housing units.
So we can expect new development under MBTA Communities to increase the levy limit substantially over time, reducing the size and frequency of future tax increases.
How Will This New Housing Affect the Cost of Services?
Of course, with new residents comes a need for additional services. However, town-provided services will be impacted differently. Snow and Ice removal, for example, will not be affected at all – we aren’t adding new roads. Many other services provided by public works are like snow and ice: They would only increase at a faster rate if we added more land area or more town facilities to the base.
Services like public safety and health and human services may see gradual increases in service requests, as more people place more demand on these departments. Right now we have a patrol officer for every 850 or so residents. This means we might need to add a new patrol officer if the population increases by 850 residents. But it’s not clear that a new officer would be needed; it depends on the trends the police department sees in their data. I think of these services as increasing by stair steps: Adding a few, or even a few hundred, residents doesn’t require us to add staff to provide more services. Adding a few thousand might mean we need to add a position but we will have added a great deal to the levy limit before we need to add those positions.
Trash Collection Impact
There is one town service that sees an impact every time we add a new unit of housing – trash collection. The town spends approximately $200 per household on solid waste collection and disposal. As mentioned above, 882 Broadway has 22 new 1 bedroom and studio apartments. When that building was all commercial the businesses paid privately for trash removal. The new trash collection costs will be at least $4,400 annually. It’s possible, however, that the building will need a dumpster and that could cost up to $20,000 annually. Either way the new revenue ($45,000) outstrips the increased costs. The town is working on creative solutions for new buildings to keep this cost as affordable as possible.
What About Schools?
Regardless of new housing construction, our student population ebbs and flows. Families move in with small children who go through the school system. The kids graduate high school but their parents, now in their 50’s or 60’s, don’t move until they are much older and need a different living situation. When they sell their homes, the new owners are likely to be families with children again. We can see a pattern of boom and bust in our school population if we look back. Right now, we are seeing a drop in elementary population as this cycle plays out again. We now have 221 fewer students enrolled in the elementary schools than we did in 2019.
We account for this ebb and flow in the budget. A number of years ago, we set a policy to add a growth factor to the school budget. We increase the budget by 50% of per pupil costs for each new student. Currently that is $8800.00 per student. But the policy works in reverse as well. We reduce the budget by the same amount per child as the student population wanes. We also see increased state aid under chapter 70 when our student population grows and may see reductions if it shrinks.
Will Multifamily Homes Add Students?
The new multi-family housing generated by MBTA communities zoning may add students to our schools – but not as many as you might think. Other large multi-family developments like the Legacy apartments and the new development at the old Brigham site have not added a lot of children to the schools directly. Going back to our two example buildings, 882 Mass Ave is all studio and 1 bedroom units, so we are unlikely to see children living there. Our MBTA communities zoning, however, must by law allow new housing that is appropriate for families. So for planning purposes, it’s best to assume we will see growth in the school population.
So what will the effect of this new housing be on the school population and our budget? Given that the new housing will be built gradually, it’s more likely to stabilize our student population than precipitously increase it. The same will be true for our budget: We will see some increases in the school budget growth factor but also increases in state aid and increases in tax revenue from the new construction.
Conclusions
If we create an MBTA communities zone per the working groups recommendation or something close to that, we will see the effect on our budget over time, not immediately. Even if the zone has a theoretical capacity of 1300 additional units (total capacity minus what is already there) the development of new housing won’t be abrupt. For budget purposes, we project our long range plan five years into the future.
When we get to a year, say FY 2023, the actual state of our budget never looks exactly like the projection created five years earlier. We cannot predict the future very far out. What we can do is look back and see what the effects of previous development have been on our budget, and we can assess the risks of our decisions. Experience tells us that multi-family development doesn’t break the budget or swamp the schools, even when the developments are large. It also tells us that turnover in the population causes ebbs and flows in the school population, regardless of new development. We can say with certainty that multi-family development increases our revenues through new growth, and that past experience has been that that new growth mitigates the need for overrides.
My conclusion is that the new development that will occur if we create a robust zone that allows multi-family development by right, will at worst give us growth in our revenues that keeps pace with any increase in services we need. At best, those new revenues will outstrip the growth in expenses and help mitigate our structural deficit. The risk of allowing this new growth is low, and the rewards are worth it, in the form of new missing middle housing, climate change mitigation, and vibrant business districts fueled by new customers nearby.
(By Vince Baudoin and James Fleming)
Could Arlington be better using its curb space? Here are some ways the curb can be used to create green infrastructure, promote public safety and accessibility, support sustainable transportation, strengthen business districts, and enable new ‘car-light’ development.
Roughly six inches high and made of concrete or granite, the curb marks the edge of the roadway, channels runoff, protects the sidewalk, and gathers stray leaves. When not assigned any other use, the space in front of the curb it usually serves as free storage for personal automobiles.
Yet the humble curb is a limited resource that can serve the community in many more ways. Have you thought about how your town budgets its curb space? For that matter, has your town thought about how it budgets its curb space?
While Arlington mostly uses its curb space for parking, some areas have other curb uses designed to achieve a specific goal. Consider the streets you use often. Have you seen an unsolved problem, or a missed opportunity, that a different use of the curb could help solve?
Create green infrastructure
The Town has miles of paved roadway. When it rains or snows, water runs into storm drains, carrying salt, oil, and other pollutants with it. The storm drains dump these pollutants directly into long-degraded waterways such as the Mill Brook, Alewife Brook, and the Mystic River. The Public Works department struggles to keep grates clear and drains from overflowing.
One solution: Use the curb for more greenery! The curb can be extended to create a rain garden or tree planting strip. The rain garden helps slow runoff and filter the water before it enters the drain, while trees benefit from additional room for the roots to grow without damaging the sidewalk. A side benefit: narrowing the street encourages drivers to slow down, making neighborhoods safer.

Promote public safety and accessibility
Often, portions of the curb are set aside for public safety purposes. For example, a fire lane provides fire department access to key buildings, such as the high school, shown below. Fire hydrants also enjoy special curb status.

Other times, no-parking zones are established to enhance the free flow of traffic, such as here at Broadway Plaza:

Where pedestrian crosswalks are present, a curb extension is a key safety enhancement. By narrowing the roadway, the curb extension encourages drivers to slow down and look for pedestrians. For pedestrians, it reduces the distance they must cross and prevents cars from parking directly next to the crosswalk and blocking visibility.

Finally, accessible parking spaces can be created along the curb. Arlington has at least 50 designated permit-only on-street parking spaces that provide convenient parking for residents with mobility issues or other disabilities.

Support sustainable transportation
When the curb is mostly used for cars, it is easy to overlook how curbside facilities can enhance other forms of transportation.
In the space of one or two parked cars, this bikeshare station offers space for 11 bikes. However, because it is installed on the roadway, it must be removed every winter so that snow can be cleared. If the curb were extended, the bikeshare station could be used year-round. Another nice feature is bicycle parking: the space to park one car can be used to park six or more bicycles.

A bus stop allows buses to pull to the curb. In some cases, it is appropriate to extend the curb so the bus would stop in the traffic lane; otherwise, it may experience delays when it merges back into traffic.

A bus priority lane provides a dedicated right of way for buses, helping to improve on-time performance. To date, these lanes extend only a few hundred feet into Arlington along Mass Ave. They have proven beneficial in many other communities.

Bike lanes, particularly if they are separated from cars by a physical buffer, greatly enhance the safety and comfort of people traveling on two wheels.
But with a limited roadway width, adding bike lanes is difficult unless the community is flexible enough to consider consolidating curb parking on one side of the street, or moving it to side streets entirely.

Finally, the Town could expand the use of on-street spaces for electric vehicle charging stations, such as this one on Park Ave:

Strengthen business districts
Nowhere is the curb more valuable than in business districts. Businesses thrive when their customers have a convenient way to reach them. Metered parking encourages people to park, do their business, and move along so another patron can take that space. Revenue from parking meters can be spent to improve the business district–for example, by planting flowers and trees.

Metered parking is not the only valuable use of curb space in a business district. Outdoor dining is a way the Town can directly support its restaurants by enabling them to serve additional customers. Here is one example in Arlington Center:

And in Arlington Heights:

Other valuable curb uses in business districts include taxi stands and loading zones. Loading zones in particular are crucial to businesses’ success and help prevent the street from being clogged by early-morning delivery trucks, late-night food-delivery vehicles, and everything in between.
Enable new ‘car-light’ development
With high housing costs and a relatively small commercial tax base, Arlington could benefit from some kinds of development. However, land is valuable and lots are small, so if new buildings are required to have large parking lots, it is very difficult to build new homes and businesses. Plus, large parking lots bring more cars and more traffic. But better curb management can help resolve this dilemma, supporting car-light development that is more sustainable and affordable.
For example, on-street permit parking can enable nearby development with few or no off-street parking spaces. New housing or businesses are a better use of land than parking and will generate more property tax revenue. When parking permits are priced appropriately, they are available to residents who need them but discourage households from adding extra cars they do not need.
Take these hillside houses: access to on-street parking made it possible to build on a steep hillside, where it would have been too expensive and difficult to blast to create off-street parking.

Conclusion
Ask your town leaders if they have a curb management strategy. Is the Town using its limited curb space in support of goals such as green infrastructure, public safety and accessibility, public transportation, local business, and car-light development?

Article 1 in a series on the Arlington, MA master planning process. Prepared by Barbara Thornton
Arlington, located about 15 miles north west of Boston, is now developing a master plan that will reflect the visions and expectations of the community and will provide enabling steps for the community to move toward this vision over the next decade or two. Initial studies have been done, public meetings have been held. The Town will begin in January 2015 to pull together the vision for its future as written in a new Master Plan.
In developing a new master plan, the Town of Arlington follows in the footsteps laid down thousands of years ago when Greeks, Romans and other civilizations determined the best layout for a city before they started to build. In more recent times, William Penn laid out his utopian view of Philadelphia with a gridiron street pattern and public squares in 1682. Major Pierre Charles L’Enfant developed the hub and spoke street plan for Washington DC in 1798. City planning started with new cities, relatively empty land and a “master builder” typically an architect, engineer or landscape architect commissioned by the land holders to develop a visionary design.
In the 1900’s era of Progressive government in America, citizens sought ways to reach a consensus on how their existing cities should evolve. State and federal laws passed to help guide this process, seeing land use decisions as more than just a private landowner’s right but rather a process that involved improving the health and wellbeing of the entire community. While the focus on master planning was and still is primarily physical, 21st century master planners are typically convened by the local municipality, work with the help of trained planners and architects and rely heavily on the knowledge and participation of their citizenry to reflect a future vision of the health and wellbeing of the community. This vision is crafted into a Master Plan. In Arlington the process is guided by Carol Kowalski, Director of Planning and Community Development, with professional support from RKG Associates, a company of planners and architects and with the vision of the Master Planning advisory committee, co-chaired by Carol Svenson and Charles Kalauskas, Arlington residents, and by the citizens who share their concerns and hopes with the process as it evolves. This happens through public meetings, letters, email, and surveys. The most recent survey asks residents to respond on transportation modes and commuting patterns
We all do planning. Starting a family, a business or a career, we lay out our goals and assume the steps necessary to accomplish these goals and we periodically revise them as necessary. The same thing is true for cities. Based on changes in population, economic development, etc. cities, from time to time, need to revise their plans. In Massachusetts the enabling acts for planning and zoning are here http://www.mass.gov/hed/community/planning/zoning-resources.html. The specific law for Massachusetts is MGL Ch. 41 sect. 81D. This plan, whether called a city plan, master plan, general plan, comprehensive plan or development plan, has some constant characteristics independent of the specific municipality: focus on the built environment, long range view (10-20 years), covers the entire municipality, reflects the municipality’s vision of its future, and how this future is to be achieved. Typically it is broken out into a number of chapters or “elements” reflecting the situation as it is, the data showing the potential opportunities and concerns and recommendations for how to maximize the desired opportunities and minimize the concerns for each element.
Since beginning the master planning process in October, 2012, Arlington has had a number of community meetings (see http://vod.acmi.tv/category/government/arlingtons-master-plan/ ) gathering ideas from citizens, sharing data collected by planners and architects and moving toward a sense of what the future of Arlington should look like. The major elements of Arlington’s plan include these elements:
1. Visions and Goals http://www.arlingtonma.gov/home/showdocument?id=19829
2. Demographic Characteristics http://www.arlingtonma.gov/home/showdocument?id=19838
3. Land Use http://www.arlingtonma.gov/home/showdocument?id=19834
Working paper: http://www.arlingtonma.gov/home/showdocument?id=19825
4. Transportation http://www.arlingtonma.gov/home/showdocument?id=19830
Working paper: http://www.arlingtonma.gov/home/showdocument?id=19822
5. Economic Development http://www.arlingtonma.gov/home/showdocument?id=19837
Working paper: http://www.arlingtonma.gov/home/showdocument?id=19828
6. Housing http://www.arlingtonma.gov/home/showdocument?id=19835
Working paper: http://www.arlingtonma.gov/home/showdocument?id=19826
7. Open Space and Recreation http://www.arlingtonma.gov/home/showdocument?id=19832
Working paper: http://www.arlingtonma.gov/home/showdocument?id=19824
8. Historic and Cultural Resources http://www.arlingtonma.gov/home/showdocument?id=19836
Working paper: http://www.arlingtonma.gov/home/showdocument?id=19827
9. Public Facilities and Services http://www.arlingtonma.gov/home/showdocument?id=19831
Working paper: http://www.arlingtonma.gov/home/showdocument?id=19823
10. Natural Resources
Working paper: http://www.arlingtonma.gov/home/showdocument?id=19824
The upcoming articles in this series will focus on each individual element in the Town of Arlington’s Master Plan.
Dave Weinstock, an Arlington resident interested in affordable housing wondered about the concept of “developer math”. The math involved in planning an affordable housing projects is a problem that needs to get solved in order to have anything built here in Arlington, or anywhere. This topic comes up frequently in community discussions about the need for more housing.
Questions are raised around:
- 1- Why build so many units vs. smaller buildings
- 2- Why parking is costly and inefficient use of land
- 3- Why can’t more affordable or all affordable units be built?
- 4- The cost of subsidizing affordable units and how that may translate to higher rental rates/costs, etc.
Dave found a great Architecture and Development firm in Atlanta (Kronberg Urbanists + Architects, based in Atlanta GA) that lays out a nice presentation, includes sample proformas, and real life scenarios that may help us understand this piece of the puzzle better when evaluating any project and how developers may be incented to build certain types of projects or do certain types of work.
Here is a link, reformatted to be within this website, to the presentation, showing the varieties of choices, costs, formulas and outcomes developers consider before deciding if the project can be built: https://equitable-arlington.org/developer-math_kua_071420/
Much of our hope for more affordable housing depends on the market forces of capitalism and the willingness of developers to build for good, not just for profit. But the developers must be able to cover their costs. Many communities are highly skeptical of developers, assuming the community will get tricked, the developer will get greedy and the promised housing will be a disappointment. Trust is needed. But so is verification. We all need to learn the developer math.
What are the math factors that a developer considers before deciding to build affordable housing?

Here is a link to the original presentation. https://www.kronbergua.com/post/mr-mu-let-s-talk-about-math
This is the second in a series of “Arlington 2020” articles. The first article looked at the number of one-, two-, and three-family homes and condominiums in Arlington, and how that housing stock has changed over time. This article will examine changes in the value of those properties. We’re going to look at “value” through the lens of property assessments, so we should start with an explanation of what property assessments are and how they’re used.
A property assessment is simply the Town Assessor’s best estimate of what a property is worth, based on market values. The assessor’s office inspects properties every ten years; during intervening years, assessments are adjusted based on sale prices of similar homes in a given tax neighborhood. For all practical purposes, assessed values tend to trail market values by two years. In my neighborhood, property assessments are spot on — my house was assessed at $501,000 in 2020; during 2018, sales of similar homes in the neighborhood ranged from $495,000 to $520,000.
Condominiums have a single assessed value, which includes land and buildings. Otherwise, assessed values are broken down into land value, building value, and yard items (e.g., a garage or a shed).
Assessed values are used to determine the tax rate. The assessors page on the town website has calculations in worksheet form, but for all practical purposes, it’s just a division problem. One takes the total tax levy and divides by the sum of all property assessments (in thousands of dollars), and that’s the tax rate. An individual’s taxes are the assessed value of their property (in thousands of dollars) multiplied by the tax rate. If an individual owns (say) 1% of the assessed value in town, that individual will pay 1% of the property tax levy.
The main point is that assessed values are based on market values, but with a two-year lag. Consequently, we can use them as a way to see how home prices have changed over time.
With that background information out of the way, we can look at some numbers. Here’s a graph of the median assessed values for condominiums, one-family, two-family, and three-family homes from 2013 through 2020. (the “median” is a value such that half of the assessments are above, and half are below).

| year | Condominium | Single Family | Two-family | Three-family |
| 2013 | $297,800 | $472,850 | $532,650 | $581,600 |
| 2014 | $300,150 | $484,400 | $530,000 | $574,800 |
| 2015 | $318,200 | $507,900 | $572,000 | $616,300 |
| 2016 | $351,050 | $546,300 | $623,150 | $673,550 |
| 2017 | $357,750 | $581,200 | $663,900 | $714,800 |
| 2018 | $395,400 | $618,800 | $732,100 | $787,600 |
| 2019 | $463,250 | $701,550 | $851,200 | $897,500 |
| 2020 | $473,100 | $771,900 | $944,000 | $1,010,850 |
| %change | 58.87% | 63.24% | 77.23% | 73.81% |
As one would expect, two-family homes are worth more than single-family, and three-family are worth more than two. Condominiums have a lot of variety; they could be half of a duplex, or a single unit in an apartment building. But a general upward trend is clearly evident.
These values are straight out of the assessor’s database, and not adjusted for inflation. The Bureau of Labor Statistic’s inflation calculator shows 12% inflation between 2013 and 2020; the %change is pretty considerable, even if one deducts 12% for inflation.
Next, I’d like to dig further into the 1–3 family assessments, by breaking them down into the value of land vs the value of buildings, and showing how that’s changed over time.
Single-family homes:

| year | Land value | Building value | Total assessed value |
| 2013 | $243,700 | $226,300 | $472,850 |
| 2014 | $253,750 | $227,050 | $484,450 |
| 2015 | $272,700 | $229,900 | $507,900 |
| 2016 | $296,400 | $243,950 | $546,400 |
| 2017 | $326,400 | $246,400 | $581,250 |
| 2018 | $360,900 | $248,100 | $618,800 |
| 2019 | $440,400 | $250,400 | $701,600 |
| 2020 | $448,600 | $316,300 | $771,900 |
| %change | 84.08% | 39.77% | 63.24% |
Two-family homes:

| year | Land value | Building value | Total assessed value |
| 2013 | $202,500 | $320,550 | $532,650 |
| 2014 | $212,250 | $307,800 | $530,000 |
| 2015 | $256,400 | $309,800 | $572,000 |
| 2016 | $262,500 | $349,400 | $623,150 |
| 2017 | $307,000 | $350,700 | $663,900 |
| 2018 | $352,500 | $373,900 | $732,100 |
| 2019 | $478,300 | $374,850 | $851,700 |
| 2020 | $454,500 | $486,100 | $944,000 |
| %change | 124.44% | 51.65% | 77.23% |
Three-family homes:

| year | Land value | Building value | Total assessed value |
| 2013 | $200,100 | $377,900 | $581,600 |
| 2014 | $209,100 | $364,100 | $574,800 |
| 2015 | $249,800 | $366,550 | $616,300 |
| 2016 | $259,950 | $412,350 | $673,550 |
| 2017 | $298,100 | $412,500 | $714,800 |
| 2018 | $343,050 | $438,800 | $787,600 |
| 2019 | $459,000 | $440,100 | $897,500 |
| 2020 | $440,100 | $578,450 | $1,010,850 |
| %change | 119.94% | 53.07% | 73.81% |
There are several things worth pointing out in these breakdowns.
First, note that the land and building values “jump” a bit between 2019–2020. 2020 was one of our full reassessment years, so I’m willing to attribute this to a periodic course correction. The total increase is generally linear, but the land/building composition has changed.
Second, the median land value for single-family homes is higher than the median building value, for all years between 2013–2020.
Third, most of the increases come from changes in land value. I believe this comes down to location, location, and location. Arlington has a well-respected public school system, and it’s close to universities and tech centers is Cambridge and Boston, and office parks in Lexington, Waltham, and Burlington. City amenities are close at hand.
So what does one do about our rising home prices, and in particular, the rising value of land? The first (and perhaps default) answer is to do nothing. Rising property values are a boon to homeowners who purchased a capital asset (i.e., a house) in the past, and have seen its value appreciate over time. The downside of doing nothing is that each year, increasing housing prices create an ever-increasing income threshold for new residents.
An alternative approach would be to allow more (and smaller) units to be built on each lot. This requires reconstruction or redevelopment, but it allows the cost of land to be amortized among several households. More units/lot means more people and more density, but it reduces the income threshold for buying in to Arlington. (Note that the per-unit cost for three-family homes is lower than the per-unit cost for two-family homes. Similarly, the per-unit cost for two-family homes is lower than the cost of a single-family home).
A third article will look at the distribution of housing prices in Arlington, and how the distribution varies by housing type.
Here is a spreadsheet of data shown in this post.