The new proposal is just the most recent step in a process that reaches back almost a decade, culminating in the Master Plan (2015), the Housing Production Plan (2016) and the mixed-using zoning amendments of 2016. The Town has consistently proposed smart growth: more development along Arlington’s transit corridors to increase the tax base, stimulate local commerce, and provide more varied housing opportunities for everyone, including low and moderate income Arlingtonians. This year’s proposals are no head-long rush into change. Today’s debate is similar to the debate before Town Meeting three years ago. If anything, progress has been frustratingly slow. To realize the Master Plan’s vision of a vibrant Arlington with diverse housing types for a diverse population, we must stay the course on which we have been embarked for so long.
Related articles
Article 16 is a proposal to encourage the production of affordable housing in the town of Arlington. I brought this article to town meeting for several reasons, namely, our increasing cost of housing and our increasing cost of land. Arlington is part of the Metropolitan Boston area; we share borders with Cambridge, Somerville, and Medford, and are a mere 5.5 miles from Boston itself. Years ago, people moved out of cities and into the suburbs. That trend has reversed during the last decade, and people are moving back to urban areas, including Metro-Boston. Metro-Boston is a good source of jobs; people come here to work and want to live nearby. That obviously puts pressure on housing prices, and Arlington is not immune from that pressure.
Another reason for proposing Article 16 was my desire to start a conversation about the role our zoning laws play in the cost of housing, and how they might be used to relieve some of that burden. During the 20th century people discovered that one cannot draw a line on a map and say “upper-class households on this side, lower-class households on that side”, but one can draw a line on a map and say “single-family homes on this side, and apartments on that side”. For all practical purposes, the latter achieves the same result as the former. When zoning places a threshold on the cost of housing, it determines who can and cannot afford to live in a given area.
Today 70% of Arlington’s land is exclusively zoned for single family homes, the predominant form of housing in town. In 2013, the median cost of a single-family home was $472,850; this rose to $618,800 in 2018 — an increase of 31%. We can break this down further. The median building cost for a single-family building rose from $226,300 in 2013 to $248,100 in 2018 (an increase of 9.6%), and the median cost for a single-family lot rose from $243,700 to $360,900 (an increase of 48%). Land is a large component of our housing costs, and it continues to rise. Certain neighborhoods (e.g., Kelwyn Manor) saw substantial increases in land assessments in 2019, enough that the Assessor’s office issued a statement to explain the property tax increases. To that end, multifamily housing is a straightforward way to reduce the land costs associated with housing. Putting two units on a lot instead of one decreases the land cost by 50% for each unit.
Article 16 tries to encourage the production of affordable housing (restricted to 60% of the area median income for rentable units and 70% for owner-occupied units). It works as follows:
- Projects of six or more units must make 15% of those units affordable. This is part of our existing bylaws.
- Projects of twenty or more units must make 20% of those units affordable. This is a new provision in Article 16.
- Projects of six or more units that produce more than the required number of affordable units will be eligible for density bonuses, according to the proposed section 8.2.4(C). Essentially, this allows a developer to build a larger building, in exchange for creating more affordable housing.
- Projects of six or more units that produce only the required number of affordable units are not eligible for the density bonuses contained in 8.2.4(C).
- Projects of 4-5 units will be eligible for the density bonuses in section 8.2.4(C), as long as they are of a use, and in a zone contained in those tables. This provision is intended to permit smaller apartments and townhouses, filling a need for residents who don’t necessarily want (or may not be able to afford) a single-family home. This provision can help reduce land costs by allowing a four-unit townhouse in place of a duplex, for example.
Historically, Arlington has had mixed results with affordable housing production, mainly due to the limited opportunity to build projects of six units or more. It is my hope that the density bonuses allow more of these projects to be built.
In conclusion, the problem of housing affordability in Arlington comes from a variety of pressures, is several years in the making, and will likely take years to address. I see Article 16 as the first step down a long road, and I ask for your support during the 2019 Town Meeting. I’d also ask for your support on articles 6, 7, and 8 which contain minor changes to make Article 16 work properly.
(This post originally appeared as a one-page handout, distributed at The State of Zoning for Multi-Family Housing in Greater Boston.)

This chart shows the assessed value of Arlington’s low density housing from 2015–2019 (assessed values generally reflect market values from two years prior). During this time, home values increased between 39% (single-family homes) and 48% (two-family homes). Most of the change comes from the increasing cost of land. As a point of comparison, the US experienced 7.7% inflation during the same period. (1)
Arlington has constructed six apartment buildings in the 44 years since the town’s zoning bylaw was rewritten in 1975; we constructed 75 of them in the preceding 44 years.(2) Like numerous communities in the Metro-Boston area, we’re experiencing a high demand for housing, but our zoning regulations have created a paper wall that prevents more housing — including affordable housing — from being built.
Communities need adequate housing, but they also need housing diversity: different types of housing at different price points. The housing needs of young adults are different than the housing needs of parents with children, which are in turn different than the housing needs of senior citizens. As demographics change, housing needs change too. Keeping people in town means providing them with the opportunity to upsize or downsize when the need arises.
If Arlington’s housing costs had only increased with the rate of inflation, the cost of single family housing would average $581K, over $170K less than today. The median household income in Arlington is about $103K/year.(3) Buying an average single family-home with that income on a typical 30-year mortgage would require approximately 46% of a household’s monthly income.(4)
Either homes in Arlington will only be available to people who have much more substantial incomes than current residents, or the town will find a way to balance the rapidly growing cost of land against the housing needs of its current citizens, those still in school, those preparing to downsize as well as those looking for a bigger space.
In addition, Arlington’s commercial economy will thrive with a greater number of housing units so we can keep the empty nesters, and the new college graduates who have lived in the town for years, as well as welcome new Arlingtonians to support our local businesses, restaurants and other services.
Our Town, like others in the state, is looking for ways to balance the needs of our citizens with the market forces of rising land costs while maintaining a healthy, diverse community.
Footnotes
- The inflation amount comes from Inflation amount from https://data.bls.gov/cgi-bin/cpicalc.pl.
- Figures on multi-family unit construction are taken from Arlington Assessor’s data. They reflect multi-family buildings that are still used as rental apartments.
- Income levels come from 2013-2017 ACS 5-year data for Arlington, MA.
- Assuming 10% downpayment, 4% interest, $800/year for insurance, and Arlington’s $11.26 tax rate, the monthly mortgage payment would be nearly $4000/month.
I’ve had an annual ritual for the past several years: obtain a spreadsheet of property assessments from the Town Assessor, load them in to a database, and run a series of R computations against the data. I started doing this for a number of reasons: to understand what was built where (our zoning laws have changed over time, and there are numerous non-conforming uses), the relationship between land and building values, the capital costs of different types of housing, and how these factors have changed over time.
I’d typically compile these analyses into a fact-book of sorts, and email it around to people that I thought might be interested. This year, I’m going to post the analyses here as a series of articles. This first installment contains basic information about Arlington’s low-density housing: single-, two-, and three-family homes, as well as condominiums. Condominiums are something of an oddball in this category — a condominium can be half of a two-family structure, part of a larger residential building, or somewhere in between. There’s a lot of variety.
Here’s a table showing how the number of units has changed over time, since 2013.
land use | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 |
---|---|---|---|---|---|---|---|---|
Single Family | 7984 | 7983 | 7991 | 8000 | 7994 | 7994 | 7998 | 7999 |
Condominium | 3242 | 3304 | 3367 | 3492 | 3552 | 3662 | 3726 | 3827 |
Two-family | 2352 | 2332 | 2308 | 2282 | 2263 | 2218 | 2183 | 2139 |
Three-family | 207 | 201 | 196 | 194 | 193 | 190 | 185 | 182 |
Arlington’s predominant form of housing — the single family home — has stayed relatively static; we’ve added 15 over the last seven years. The number of condominiums has increased significantly: +585 over seven years. That, coupled with the reduction of two-family homes (-213) and three-family homes (-25) leads me to believe that a fair number of rental units have been removed from the market.
Next, I’d like to look at how these homes are spread across our various zoning districts. (The “Notes” section at the bottom of the post explains what the zoning district codes mean).
Zone | Single-Family | Condo | Two-family | Three-family |
---|---|---|---|---|
B1 | 8 | 22 | 13 | 11 |
B2 | 1 | 4 | 1 | |
B2A | 1 | 18 | ||
B3 | 59 | 4 | ||
B4 | 1 | 59 | 5 | 5 |
B5 | 1 | 1 | ||
I | 8 | 18 | 7 | 1 |
R0 | 502 | |||
R1 | 6798 | 168 | 200 | 7 |
R2 | 647 | 1816 | 1881 | 124 |
R3 | 4 | 39 | 11 | 17 |
R4 | 23 | 79 | 2 | 3 |
R5 | 3 | 616 | 5 | 4 |
R6 | 2 | 686 | 8 | 7 |
R7 | 1 | 243 | 2 | 1 |
A few points to note:
- R0 is our newest district, which was established in 1991. It consists only of conforming single-family homes.
- R1 is Arlington’s original (per 1975 zoning) single-family district. It’s predominantly single-family homes, but there are a fair number of two-family homes, and even a few three-families. The presence of condominiums suggests additional multi-family homes (that consist of two or more condominiums)
- R2 is predominantly two-, and three-family homes. Although three-family homes are no longer allowed in this district, R2 has the largest number of three-families in town.
- Residential uses are no longer allowed in the industrial (I) districts, but the I districts contain 34 homes. These buildings pre-date the current zoning laws (aka “pre-existing non-conforming”). A good portion of the Dudley street industrial district is a residential neighborhood.
I’m pointing out these conformities (and non-conformities) for a reason. The zoning map (and use tables) dictate what is allowed today, along with specifying a vision for the future. Our zoning bylaw happens to contain a strong statement to this effect: “It is the purpose of this Bylaw to discourage the perpetuity of nonconforming uses and structures whenever possible” (section 8.1.1(A)). Despite the strong statement of intent, it can take decades (if not generations) for a built environment to catch up with the bylaw’s prescriptions.
I’ll finish this post with a breakdown of how condominiums are distributed across the various zoning districts:
Zone | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | delta |
---|---|---|---|---|---|---|---|---|---|
(N/A) | 14 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | -14 |
B1 | 16 | 16 | 18 | 18 | 18 | 22 | 22 | 22 | 6 |
B2 | 2 | 2 | 2 | 2 | 4 | 4 | 4 | 4 | 2 |
B2A | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | -1 |
B3 | 55 | 55 | 61 | 59 | 59 | 59 | 59 | 59 | 4 |
B4 | 47 | 47 | 59 | 59 | 59 | 59 | 59 | 59 | 12 |
I | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 0 |
R1 | 140 | 144 | 146 | 148 | 150 | 154 | 162 | 168 | 28 |
R2 | 1355 | 1406 | 1456 | 1518 | 1574 | 1670 | 1723 | 1816 | 461 |
R3 | 22 | 25 | 28 | 31 | 31 | 37 | 37 | 39 | 17 |
R4 | 65 | 67 | 67 | 79 | 79 | 79 | 79 | 79 | 14 |
R5 | 616 | 616 | 616 | 616 | 616 | 616 | 616 | 616 | 0 |
R6 | 630 | 632 | 635 | 683 | 683 | 683 | 686 | 686 | 56 |
R7 | 243 | 243 | 243 | 243 | 243 | 243 | 243 | 243 | 0 |
The last column (“delta”) shows the difference between 2013 and 2020. The largest increase occurred in the R2 (two-family) district, followed by R6 (medium-density apartments, where most of the increase took place in 2014) and R1 (single-family).
That it will do it for the first installation. In the next post, we’ll look at how the cost (assessed values, actually) of Arlington’s low density housing has changed over the last seven years.
Here is a spreadsheet, containing the various tables shown in this article.
Notes
Arlington’s zoning map divides the town into a set of districts, and each district has regulations about what kinds of buildings and uses are allowed (or not allowed). The districts mentioned in this article are:
- B1 (Neighborhood Office district)
- B2 (Neighborhood Business distrct)
- B2A (Major Business District)
- B3 (Village Business District)
- B4 (Vehicular-Oriented Business District)
- I (Industrial District)
- R0 (Single-Family, large-lot district)
- R1 (Single-Family Distict)
- R2 (Two-Family District)
- R3 (Three-Family District)
- R4 (Townhouse District)
- R5 (Low-Density Apartment District)
- R6 (Medium-Density Apartment District)
- R7 (High-Density Apartment District)
Arlington’s Zoning Bylaw describes each district in detail (see sections 5.4.2, 5.5.2, and 5.6.2)
Accessory Dwelling Units (aka “granny flats”)
The following information was presented to the Arlington Redevelopment Board in October, 2020 by Barbara Thornton, TMM, Precinct 16
This Article proposes to allow Accessory Dwelling Units, “as of right”, in each of the 8 residential zoning districts in Arlington.
Why is this zoning legislation important?
Arlington is increasingly losing the diversity it once had. It has become increasingly difficult for residents who have grown up and grown old in the town to remain here. This will only become more difficult as the effects of tax increases to support the new schools, including the high school, roll into the tax bills for lower income residents and senior citizens on a fixed income. For young adults raised in Arlington, the price of a home to buy or to rent is increasingly out of reach.
Who benefits from ADUs?
- Families benefit from greater flexibility as their needs change over time and, in particular providing options for older adults to be able to stay in their homes and for households with disabled persons or young adults who want additional privacy but still be within a family setting.
- Residents seeking an increase in the diversity of housing choices in the Town while respecting the residential character and scale of existing neighborhoods; ADUs provide a non-subsidized form of housing that is generally less costly and more affordable than similar units in multifamily buildings;
- Residents wanting more housing units in Arlington’s total housing stock with minimal adverse effects on Arlington’s neighborhoods.
What authority and established policy is this built on?
Arlington’s Master Plan is the foundational document establishing the validity and mission for pursuing the zoning change that will allow Accessory Dwelling Units.
Under Introduction in Part 5, Housing and Residential Development, the Master Plan states: Arlington’s Master Plan provides a framework for addressing key issues such as affordability, transit-oriented residential development, and aging in place.
The Master Plan states that the American Community Survey (ACS) reports that Arlington’s housing units are slightly larger than those in other inner-suburbs and small cities. In Arlington, the median number of rooms per unit is 5.7. There is a great deal of difference in density and housing size among the different Arlington neighborhoods. The generally larger size of homes makes it easier to contemplate a successful move to encourage ADUs.
What do other municipalities do?
According to a study (https://equitable-arlington.org/2020/02/16/accessory-dwelling-units-policies/), by 2017 65 out of 101 municipalities in the greater Boston (MAPC) region allowed Accessory Dwelling Units by right or by special permit. The average number of ADU’s added per year was only about 3. But by 2017, Lexington had 75 ADUs and Newton had 73. Both of these communities were among about 10 “as of right” municipalities in the MAPC region. This finding suggests that communities with more restrictions are less likely to see any significant affordable housing benefits.
Even in the midst of a housing crisis in this region, according to Amy Dain, housing expert, (https://equitable-arlington.org/2020/02/18/zoning-for-accessory-dwelling-units/) most municipalities still have zoning laws that restrict single family home owners from creating more affordable housing.
And this is despite the fact that, as according to Banker & Tradesman, March 10, 2020: https://www.bankerandtradesman.com/63-percent-in-greater-boston-back-adus/, 63% of people in the region approve of ADUs. California has recently passed strong pro-ADU legislation. A study by Zillow further corroborated this strong interest in communities across the US, including our region. https://equitable-arlington.org/2020/03/10/adu-popularity/.
Learn more about Accessory Dwelling Units/ “Granny Flats” here: https://planning.org/knowledgebase/accessorydwellings/

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.
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.
The calculation for what is permanently affordable housing is complicated. Arlington’s affordable rate is based on a region that includes the Area Median Income (AMI) of the Cambridge-Boston-Quincy region. The rate is adjusted and reset periodically according to federal HUD guidelines. The rate is applied based on family size and on the Town’s definition of what income level is eligible for Inclusionary Housing opportunities in Arlington. In Arlington a 3 person family would qualify if their income was under 60% of AMI. At this time, that is approximately $58,000 for a family of three.
For more information, see this table of income limits from Cambridge’s Community Development Department, and this short paper on affordable housing from the City of Boston.