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
(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?


Massachusetts is experiencing a housing affordability crisis and a climate crisis. For these reasons, Mothers Out Front Arlington supports changes in zoning by-laws that allow greater density in housing near public transit. Mothers Out Front is supportive of the passage of a meaningful MBTA Communities Act that encourages the development of more multi-family housing and a greater diversity of home types in Arlington. 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. In addition, passing this by-law will allow Arlington to participate in the Massachusetts pilot for communities to build fossil fuel-free homes, thus ensuring that new construction in Arlington supports our net-zero climate goals.
Mothers Out Front Arlington respects the public engagement activities that inform the Working Group’s MBTA Communities Act proposal. We appreciate that the Working Group is working with the Town to identify opportunities for developer incentives to encourage public open spaces, mitigate heat islands, and increase the tree canopy. Similarly, the Town’s commitment to maintaining current (and incentivizing higher) zoning requirements for affordable housing also is important to our group. For these reasons, Mothers Out Front Arlington strongly urges the Arlington Redevelopment Board to accept the MBTA Communities Act plan as proposed by the Working Group.
Some years back, I took a bus ride to a climate rally in New York City with a bunch of other activists. My seatmate was 12 years old, a smart kid from the suburbs who had never been to New York. As we approached Manhattan on the Cross Bronx Expressway, he looked out at a block of concrete apartment buildings and said something like: This is what happens when you don’t care about the environment. Actually, I replied, this is green living: People live close together; they can walk or take public transit; they live in apartments, share walls and heat and are relatively energy efficient; their carbon footprint is far lower than a family in a “green”, leafy single-family suburban house.
But my traveling companion was not altogether wrong about what he saw: New York, Boston, and every other city are now at pains to make a humane, equitable adaptation to a changing climate. We don’t want to create living spaces that bake in the sun’s heat, that have no shade or greenery or open space, surrounded by asphalt and highway, beset with deadly particulate pollution, flooding risk, and polluted stormwater runoff. Heat and air pollution are an expensive and deadly burden that fall especially heavily on low- and middle-income folks — a burden cruelly increasing with climate change.
As we decide what kinds of housing we are going to encourage in Arlington, we can do things in a more compassionate and inclusive way. We can incorporate environmental and aesthetic concerns, while allowing a mix of housing types that accommodate people of diverse incomes, family sizes, and life stages.
We can address both the climate crisis and the crisis-level housing shortage in Greater Boston. Environmental concerns are not a reason to say no to new housing. Rather, they are a part of the housing solution, in Arlington and regionally.
As Laura Wiener detailed in another post, The Housing Corporation of Arlington development at 10 Sunnyside (between Broadway and Mystic Valley Parkway, near Route 16), is an excellent example of implementing environmental/sustainability measures in an affordable (i.e. income-subsidized) multi-family dwelling. It is Passive House certified: An extremely stringent standard, using a combination of advanced and repurposed materials, high- and low-tech, to provide human comfort while bringing energy use to an absolute minimum.* The development features plentiful bike parking and a roof garden. It converts previously impervious pavement to landscaping, like planters, where stormwater can infiltrate the ground rather than carrying unfiltered pollutants into Arlington’s water bodies.
Another example of green infrastructure lives charmingly and unassumingly on some of our street corners. In 2020, Arlington installed rain gardens at the corner of Milton Street and Herbert Road in East Arlington. These little curbside oases act as a kind of green filter for storm water, catching pollutants (Fertilizer! Salt! Dog poop! Oil! Brake dust!) before they reach Alewife Brook and the Mystic River. Perhaps co-sited with new housing, wider buildout of rain gardens could keep nutrient pollution out of Spy Pond, preventing nasty algae growth which literally suffocates other aquatic life.
A caveat: We must take care not to load so many creative requirements onto new housing that it doesn’t get built at all. We need the housing. (See “The Problem with Everything-Bagel Liberalism” by Ezra Klein in the New York Times.) And under the new MBTA Zoning that we are required to implement, we must allow three-family housing in our new multi-family zones by right, i.e. without extra requirements or rigamarole.
But we could decide to add incentives to allow more housing above those requirements if such environmental improvements (rain gardens, green roofs, pollinator habitat, Passive House innovations, etc.) are included. Every new building is an opportunity for environmental adaptation. A vision for a greener, cooler, more inclusive Arlington takes shape. We can do this.
New housing development provides an opportunity to incorporate inclusive, environmentally friendly, win-win adaptations. Our environmental and housing goals must not be in tension with each other. With a coordinated approach, we can address the challenges of pollution, climate change, and our chronic and unjust housing shortage.
*As far as I can tell, only two other buildings in all of Greater Boston are Passive House certified: A new multi-family in Roxbury, and a single-family in Somerville.
by Andy Greenspon
Image credit: Henry Hudson Kitson, Public domain, via Wikimedia Commons
In 2023, Lexington was one of the first towns to comply with the State “MBTA Communities” law (MBTA-C) by adding 227 acres to several multifamily overlay zones. When discussing this proposal, it was estimated to possibly generate 400-800 units in 4-10 years. However, after receiving building permit applications for about 1,100 units in the first year (including 160 inclusionary affordable units), Lexington passed Article 2 at a Special Town Meeting recently, which decreased the amount of land in these zones to approximately 90 acres. What can Arlington learn from Lexington’s experience?
Overall, Lexington’s experience shows us that developers are willing and able to build multifamily housing on large lots that aren’t very built up, and that MBTA-C can be successful in adding new housing in some circumstances. However, Arlington has few if any large, sparsely-built parcels zoned to allow multifamily housing under MBTA-C. As such, Arlington is unlikely to add significant amounts of new housing or affordable housing as a result of the MBTA-C overlay passed at Town Meeting in fall of 2023.
Parcel Size and Existing Buildings
Many of the parcels in Lexington’s MBTA-C zone are multiple acres each, are underutilized, and contain older office space. In contrast, Arlington’s MBTA-C parcels are much smaller and mostly covered with existing buildings, typically residential.
The largest development approved under MBTA-C so far in Lexington is at 3-5 Militia Drive. This land is three very large parcels containing a couple older office buildings, a previous religious institution, and giant surface parking lots. Therefore, such a property was already primed for redevelopment and the large lots allowed for 292 units to be approved. These parcels are also within walking distance of Lexington Town Center and the Minuteman Bike path, so multi-family housing on this location is a great use.
In contrast, there are no similar parcels in Arlington in the MBTA-C zone with large surface parking lots and aged office space that could be redeveloped in such a manner. One of the few parcels in Arlington that is somewhat similar to the planned parcels for redevelopment in Lexington would be the Walgreens at 324 Massachusetts Ave, 1.5 acres with a surface parking lot. However, this parcel was specifically excluded from the MBTA-C overlay along with all other business parcels to avoid displacing any existing business space. And the parcel is unlikely to be redeveloped one way or another unless Walgreens chooses to close their business and sell the parcel to a developer.
In short, compared to Lexington, Arlington is “built out” insofar as almost every parcel is utilized in some manner with high lot coverage. The original Lexington MBTA-C zone contained many parcels with low lot coverage, large surface parking lots, and underutilized office space, all attributes that make such parcels more likely to be sold to a developer to construct housing if permitted by zoning.
Last, while 1,100 units have been permitted so far, this does not mean all these units will be constructed given current financial uncertainty in the economy and high interest rates. It will also take several years for these properties to be completed and prepared for occupancy. As such, the original estimate of 400-800 units in 4-10 years (an estimate that actually widely ranges from 40 units all the way to 200 units per year) may in fact not be that far off from the final numbers once buildings are completed. The parcels most primed for redevelopment were acquired and permitted first. Finally, it is not entirely clear how many more parcels would have been redeveloped in the next 5-10 years had the Lexington MBTA-C zoning not been reduced in size.
Development Potential in Arlington
Most privately owned lots in Arlington are less than ⅓ of an acre with many much smaller, significantly limiting the amount of new housing development on any single parcel. Almost all of these lots are covered by existing buildings, and some of those buildings are condominiums. Therefore, in order for a large new construction project to occur on such parcels in Arlington’s MBTA-C multifamily zone, all of the following would have to take place:
- a single owner would have to take control of multiple lots and/or condominiums, meaning that
- multiple existing property owners would have to want to sell at the same time, or else the new owner would have to take the time and risk to assemble the property slowly, and
- the new proposed development would have to be large and profitable enough to make up for the combined purchase prices of all the properties acquired.
Meanwhile, properties in Arlington generally turn over at a fairly slow and steady pace. This is in contrast to underused large commercial properties, whose owners are more eager to sell.
With simulation modeling performed on potential rate of redevelopment, the Arlington Redevelopment Board’s 2023 Report to Town Meeting on the MBTA-C proposal projected that 15–45 parcels could be redeveloped over the next ten years, for a net increase of 50–200 new units or 5–20 per year, far fewer than even the initial Lexington housing unit construction estimates at the time of passage of their initial MBTA-C zoning.
In fact, Arlington has seen even less than the low end estimate of 5 units per year so far since our MBTA-C zoning became effective. Only a single project has been permitted so far, which would turn an existing 2-unit building into 4 units, a potential net gain of 2 housing units.
Lessons
- There is strong regional demand for housing including for multifamily units.
- Developers are currently willing and able to build when lots are available, are zoned multifamily, and aren’t already full of other buildings.
- Arlington can’t expect anywhere near as many new units with our current zoning as Lexington saw, because our MBTA-C multifamily zones are almost exclusively made up of smaller and built-up lots.
- As a result, Arlington’s current zoning won’t add much housing or affordable housing to our community, and won’t noticeably increase our tax base either.
An ADU is a separate, smaller living unit with its own kitchen and bathroom facilities and separate entrance that is included within a larger resident (type 1), attached to a residence (type 2) or located in an accessory (“detached”) structure on the same lot as a main residence (type 3). For a variety of reasons, primarily cost and feasibility, the type 1 ADUs are by far the most common.
Article 43 on Arlington’s warrant for Spring 2021 Town Meeting would allow accessory dwelling units in connectin with single-family dwellings, two-family dwellings and duplex dwellings, as long as the ADUs can conform to dimentional requirements in existing zones (aka R0, R1, R2, B) and all code requirements. These dimensional requirements including setbacks, side yards, height, etc.
The sizes of these ADUs are determined by the size of the finished area of the specific home and must meet the dimensional requirements of the zoning district. Many homes in Arlington may not qualify for a Type 2 (attached) or Type 3 (detached) ADU. This chart shows the probable average square footage size of an ADU in each of the Town’s 21 precincts. There is a considerable difference, ranging from 479sf in precinct 4 to 885sf in precinct 8. The town wide average is 652 sf, not very big but a perfect size for an individual looking for a smaller, less expensive home in Arlington. No matter how big the home, the maximum size is capped at 900sf.
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
The presentation, dated March 11, 2019, includes slides used to present the information necessary to understand the rationale for zoning changes, the location of the zoning areas under consideration and the charts, tables and maps that help describe the situation. The proposed zoning changes, especially articles 6, 7, 8, 11 and 16, only cover changes affecting about 7% of the Town, those parts of the Town that are currently zoned R4-R7 and the B zoning districts.