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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.
Jennifer Susse authored this letter on January 20, 2020. Ms. Susse is a member of the Arlington School Committee and a Town Meeting Member. She closely follows the costs and demographic trends of school enrollment and of Town finances.

I write in support of efforts to increase housing in Arlington, both as a resident and as a member of the School Committee. I support these efforts not in spite of their potential effects on our schools, but because of their potential effects on both schools and town.
I have often spoken to the community about our rapid enrollment growth — over 2,000 students added in the last 25 years, 60 percent of those in the last 10 years. Because of these large enrollment increases the Arlington Public Schools have had to add capacity, which the town has generously supported. So how can I be in favor of adding more housing to Arlington, and thus potentially adding even more students to our already stressed school facilities?
Losing diversity
I will get to the capacity issue in a bit, but first I want to point out that in the last 30 years Arlington has lost both economic and generational diversity. The story about the loss of economic diversity is well known; the loss of generational diversity less so.
Between 1990 and 2010, the percentage of residents between 20 and 34 dropped from 28 percent to 17 percent. During that same period, the population over 65 dropped from 18 percent to 16 percent. What replaced these demographic groups were primarily residents between the ages of 35 and 54 and 0 and 14. In other words, mostly families with school-aged children. The loss of both types of diversity weakens the fabric of our community. However, the loss of generational diversity also weakens the town’s finances.
The average cost to the town of an additional student is about $8,500, a number that includes what’s known as the Enrollment Growth Factor (the amount that the town gives to the schools for each additional student in the system, currently at 50 percent of the per pupil cost of the preceding year, or $7,297), as well as the average cost of the benefits that the town pays for new hires.
What this means is that during the time a household has children in the school system, it is likely receiving more in benefits than it pays in taxes. For the town’s finances to work, we also need people who do not have children to live and pay taxes in Arlington, including young adults and older adults for whom Arlington is becoming less affordable because of condo conversions, teardowns, etc.
Overcrowded classrooms
But what about our overcrowded classrooms? The answer is that given the type of housing likely to be created on the main corridors, and the timing of that housing construction, I am not worried about further stresses to our school facilities.
By the time new housing is built, our elementary-aged population will likely be in modest decline. Five to 10 years out we expect to see enrollment stabilize at the middle and high school levels as well. That does not mean that we will have tons of extra space; just that we will no longer be in danger of taking over art, music, and literacy rooms for general classroom use.
Enrollment projections made by Dr. Jerome McKibbin in 2015 have so far been fairly accurate. His revised projections show that, without additional housing, we are expected to have 350 fewer elementary-aged students in the Arlington Public Schools 12 years from now than we have today.
The discussion about housing in Arlington reminds me of the discussion a few years ago over the Affordable Care Act. At that time, there was a lot of anxiety about potential changes to the health-care system, but insufficient appreciation (in my opinion) of the then current trends.
Zoning changes
Any discussion of zoning changes in Arlington must take an honest look at where we are now, and the direction we are headed in if there were no zoning changes. Our current trends have us losing natural affordability and economic and demographic diversity because of teardowns, condo conversions and sharp price increases. We don’t have the option to freeze Arlington as we know it today (or 10 years ago) in place.
In closing, I would like to say that I am proud of our excellent schools and strongly believe that families who have recently moved to Arlington have strengthened our community, but I do not want Arlington to become a place where people move in with toddlers and move out soon as their children graduate from high school. The current trends have us losing both economic and generational diversity, which threatens not only our community and civic life, but our financial health as well. Adding more and diverse housing can help.
As the public hearings on the zoning articles proceeded in late winter and early spring, 2019, it became clear that there was a very strong sentiment that the proposed increase in density in these designated zoning districts should result in an increase in affordable housing in Arlington. This coincided with the approved 2015 Master Plan’s stated goals:
- Encourage mixed-use development that includes affordable housing, primarily in well-established commercial areas.
- Provide a variety of housing options for a range of incomes, ages, family sizes, and needs.
- Preserve the “streetcar suburb” character of Arlington’s residential neighborhoods.
- Encourage sustainable construction and renovation of new and existing structures (see ch. 5, pg 77++ for housing section)
- The Yes on 16 report supports the citizen initiated petition resulting in Article 16 and demonstrates the tremendous impact of rapidly increasing land values on the overall affordability of property in Arlington. Building a stack of homes on one footprint is far more financially affordable than creating a single home on the same footprint of land.
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)
In the past few weeks, a number of highly respected Arlington organizations have come out in support of the MBTA Communities Plan. Here are a few. We will continue to update this list as it grows.
Greater Boston Interfaith Organization
This week the Greater Boston Interfaith Organization’s Arlington members released a letter of support, stating:
Arlington GBIO members support the Arlington Redevelopment Board’s proposal for the Article 12 of the Fall 2023 Special Town Meeting (MBTA Communities Overlay District) to enact changes in Arlington’s zoning by-laws that will allow for more multi-family housing to be built by right. We support an article that goes beyond the minimum capacity required by law in order to encourage the construction of a meaningful number of additional homes of various sizes beyond the number already present in Arlington.
Arlington Chamber of Commerce
The Arlington Chamber of Commerce sent a letter supporting the MBTA Communities Plan on October 2, saying:
The Arlington Chamber of Commerce believes that the MBTA Working Group’s proposal presents a strong plan for both housing and commercial growth. Arlington’s existing and future small businesses will benefit from an increased customer base and foot traffic resulting from additional housing units.
Division of Diversity, Equity and Inclusion
Arlington’s Division of Diversity, Equity and Inclusion wrote to the Arlington Redevelopment Board in support of the MBTA Communities Plan:
The DEI Division would like to formally voice our support for the Working Group’s effort to create a zoning plan that would allow for more multi-housing opportunities at varied price points across Arlington. Only 9% of Arlington’s land is devoted to multifamily housing, and even where building multi-family housing is allowable, it is not permitted by right. This does not provide suitable conditions for a range of housing types to exist. The current price point of homes in Arlington are far beyond the reach of most residents, regardless of their status as a member of a protected class. stating:
Read the full letter. [PDF]
Clean Energy Future Committee
The Clean Energy Future Committee said passage of the MBTA Communities Zoning was crucial because:
Passage of the MBTA Communities zoning amendment at this fall’s Special Town Meeting is the only viable pathway for Arlington to participate in the State’s Fossil Fuel Free Demonstration Program (Demonstration Program), which would allow implementation of the Clean Heat bylaw and home rule petition passed overwhelmingly by Arlington Town Meeting in 2020. Participation in the Demonstration Program will allow the Town to prohibit the installation of natural gas, oil, propane, and other fossil fuel infrastructure in new buildings and major renovations. Town Meeting sent a clear message in 2020 that enacting the Fossil Fuel Bylaw was a priority, and we–the CEFC, Town administrators, and elected and appointed bodies–have an obligation to act upon that priority; passage of the MBTA Communities zoning amendment is an essential step to carrying out the will of Town Meeting.
Mothers Out Front
As we previously reported, the Arlington chapter of Mothers Out Front supports the MBTA Communities Plan, writing:
A revised zoning by-law to allow for more multi-family housing will reduce pressure to build single family homes on undeveloped land elsewhere in Massachusetts. This safeguards undisturbed ecosystems and provides real alternatives to automotive commutes in the region, reducing both congestion and fossil fuel emissions.
Prof. Christophe Reinhardt runs the MIT Sustainable Design Lab. On Nov. 25, 2019 he gave a very interesting presentation, including talk and slides, that shows a pathway to make more housing, all kinds of housing, and greater housing density both more palatable in Arlington, and actually desirable. He also stressed the importance of paying attention to housing now in order to meet the climate change challenge. Charts (starting about 10 min in) show how drastically we need to reduce our carbon footprint to reach net zero by 2050. Buildings today account for about 40% of our carbon emissions world wide. What we build today will likely be around through 2050.
Paying attention to housing design is important to create a sustainable environment.
Here is the link for the Reinhardts talk and slide show:
http://scienceforthepublic.org/energy-and-resources/designing-sustainable-urban-development
or see it on youtube: https://youtu.be/YAeCvUZmUrI
He uses research, drawn from around the world and locally, to show what measurable attributes make local communities desirable to live in and what attributes of housing make residents happy.
Key attributes for success (slide is at about 18:15 min. in presentation):
1. Economic opportunities (proximity to work opportunities)
2. High quality living (daylight access for buildings, streets, walkable, mixed use, micro-units, vibrant public spaces, organic food, fitness opportunities)
3. Sustainability (comfortable work and play and living spaces, resource efficiency)
The presentation was arranged by the Robbins Library. It was developed and recorded by Science for the Public as part of it’s lecture series.
For more information on sustainability and cities, cities and local municipalities are beginning to recognize the important linkages between urban resiliency, human well-being, and climate change mitigation and adaptation activities. https://news.mongabay.com/2019/11/how-cities-can-lead-the-fight-against-climate-change-using-urban-forestry-and-trees-commentary/ Courtesy of Science for the Public Interest Weekly News Roundup.
(For more opportunities to learn about sustainability, buildings and cities, sign up for the FREE MITx “Sustainable Building Design” online course which starts January.)
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.
It’s New Year’s eve and I’m determined to get my third and final “Arlington 2020” article written and posted before 2021 rolls in. I’ve written these articles to paint a picture of Arlington’s housing stock, and how our housing costs have changed over time. The first article looked at the number of one-, two-, and three-family homes and condominiums in Arlington. The second article looked at how the costs of these homes has varied over time.
In this article, I’m going to look at the per-unit costs for our different housing types. The per-unit cost is just the assessed value, divided by the number of units. For condos and single-family homes, the unit cost is simply the assessed value. For two-family homes, it’s the assessed value divided by two. For a ten-unit apartment building, it’s the assessed value divided by ten. We’ll look at the price ranges within housing types, as well as the general differences between them.
The information here doesn’t include residential units from Arlington’s 76 mixed-use buildings. (My copy of the assessor’s data doesn’t distinguish between residential and commercial units in these buildings; I’ll try to say more about them in 2021.) It also omits units owned by the Arlington Housing Authority.
Condominiums
Condominiums provide the most variety and cost diversity. A condo can be half of a duplex, or part of a much larger multi-family building. The low end of the scale tends to be 500–600 square foot units that were built in the 1960’s; the high end tends to be more spacious new construction.

This graph is a histogram, as are the others in this article. The horizontal axis shows cost per unit, and the vertical axis shows the number of units in each particular cost band.
The per-unit price distribution is
| min | 1st quartile | median | mean | 3rd quartile | max |
| $92,600 | $344,450 | $473,100 | $500,086 | $640,850 | $1,241,000 |
Single-family homes
Single family homes are heavily concentrated around the $700,000 mark. There’s very little available for less than a half million dollars.

Per unit rice distribution:
| min | 1st quartile | median | mean | 3rd quartile | max |
| $103,700 | $679,900 | $771,900 | $825,172 | $908,750 | $3,232,700 |
The $103,700 single-family home deserves some explanation. The property straddles the border between Arlington and Lexington; it appears that the $103k assessed value reflects the portion that lies in Arlington.
Two-family Homes
Two-family homes are the bread and butter of East Arlington; they’re also common in the blocks off Mass ave near Brattle Square and the heights. Many of these homes are older and non-conforming, and they’re gradually being renovated and turned into condominiums.
As a reminder, these are costs per unit (as opposed to the cost of the entire two-family home).

Per unit price distribution:
| Min | 1st quartile | median | mean | 3rd quartile | max |
| $209,050 | $440,550 | $472,000 | $479,175 | $508,588 | $1,140,450 |
Three-family Homes
Unlike Dorchester and Somerville, three-family homes are not a staple of Arlington’s housing stock. But we have a few of them. Most were built between 1906 and 1930.

Per-unit price distribution:
| Min | 1st quartile | median | mean | 3rd quartile | max |
| $227,567 | $313,733 | $336,950 | $344,292 | $362,600 | $719,000 |
Small Apartments (4–8 units)
The majority of Arlington’s small apartment buildings were constructed during the first half of the 20th century. The most recent one dates from 1976.

Per-unit price distribution:
| Min | 1st quartile | median | mean | 3rd quartile | max |
| $154,950 | $202,950 | $227,775 | $231,619 | $255,775 | $403,875 |
Large Apartments (9+ units)
You’ll see three outliers in the per unit-cost distribution for large apartment buildings. These correspond to the newest apartment complexes in Arlington: The Legacy (2000), Brigham Square (2012), and Arlington 360 (2013).

Per-unit price distribution:
| Min | 1st quartile | median | mean | 3rd quartile | max |
| $117,013 | $141,383 | $153,006 | $195,789 | $170,973 | $474,631 |
All combined
Finally, we’ll put it all together in one picture, representing nineteen-thousand and some odd homes in town.

Per-unit price distribution:
| Min | 1st quartile | median | mean | 3rd quartile | max |
| $92,600 | $417,175 | $555,825 | $587,975 | $759,900 | $3,232,700 |
While there are lower-priced options available, a person coming to Arlington should expect to buy (or rent) a property that costs just shy of half a million dollars (or more).
Here is a spreadsheet with the cost distributions mentioned in this article.

