Multifamily Zoning for MBTA Communities

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.

Map of MBTA communities, by community category

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.

MBTA Communities multi-family housing

Redlining and Urban Heat Islands

In the 1930’s the Home Owner’s Loan Corporation of America (HOLC) created actuarial maps of the United states. These maps were color coded — Green, Blue, Yellow, and Red — to reflect the amount of “risk” associated with home loans in those areas. The colors corresponded to “Best” (green), “Still Desirable” (blue), “Definitely Declining” (yellow), and “Hazardous” (red). Being in a green area made you likely to secure a federally-insured home mortgage, something that was effectively unavailable to red areas. Red areas were often associated with black populations, and these maps are where the term “redlining” comes from.

Here’s an HOLC map of Arlington, courtesy of the University of Richmond’s mapping inequality project.

"Redline" map of Arlington, MA, courtesty of the Home Owner's Loan Corporation — HOLC “redline” map of Arlington, Massachusetts

Note that Arlington does not have any “Hazardous” (red) areas; 68% of the town fell into the top two grades, meaning that we were generally a safe bet as far as federal mortgage insurers were concerned. To the extent that the HOLC preferred white communities, Arlington seems to have fit the bill. According to US census data.

1930: population 36,094. No breakdown by race.
1940: population 40,013. 99.8% white.
1950: population 44,353. No breakdown by race.
1960: population 49,953. 99.7% white.
1970: population 53,524. 99.0% white.
1980: population 48,219. 97.3% white.

Today, Arlington is about 84% white. But during the time that mortgage approvals were based on the HOLC maps — the mid 1930’s through the mid 1960’s — we certainly qualified as an overwhelmingly (> 99%) white community.

Arlington had four yellow-lined (“definitely declining”) areas; about 32% of the town. C1 (on the western edge of town) was noted for an “infiltration of Jews”, a “heavy concentration of relief families”, and hilly terrain which was “not conducive to good development”. But it had good schools and a nice area along Appleton St. C2 (along Mass Ave and Mill Brook) was noted for “obsolescence” with “business and housing mixed together” and “railroad tracks through [the] neighborhood”. There was an infiltration of lower-class people, a moderate number of relief families, and “little possibility of conversion of properties to business use”.

C3 (East Arlington, around the present location Thompson School and Menotomy Manor) was noted for “Obsolescence, poor reputations” and “foreign concentration”. There was an “infiltration of foreign [residents]” and a “heavy concentration of relief families”. On the positive side, there were “a few small farms in this section of high grade development of the ground [which] may be anticipated in the early future with modest houses”.

Finally, C4 (around Spy Pond, and near the Alewife T station) was “obsolescent”, with an infiltration of foreign families, and a moderately heavy concentration of relief families. The HOLC noted that “Houses East of Varnum Street [and] south of Herbert Road are built on low ground and many have damp basements which makes them difficult to keep occupied”.

That’s what the HOLC saw as the declining side of Arlington: Jews, foreigners (mostly Italian), relief families, obsolescence, damp basements, and proximity to the Boston-Maine railroad.

Exercise for the reader. Arlington has five public housing projects: Drake Village, Winslow Towers, Chestnut Manor, Cusack Terrace, and Menotomy Manor. What HOLC colors are associated with our public housing?

Buildings last for decades, and effects of the HOLC’s underwriting policies are still with us today — sometimes in unexpected ways. A 2020 paper called “The Effects of Historical Housing Policies on Resident Exposure to Intra-Urban Heat: A Study of 108 US Urban Areas” examined 108 communities, and tried to determine if there was a relationship between redlined areas and urban heat islands. Nationwide, this is what they found:

Land surface temperature as a function of HOLC risk category — Land Surface Temperature, by HOLC risk rating

LST stands for “land surface temperature” and shows how different HOLC risk categories compare to the overall temperature of a region. Green areas tend to be cooler, with less paved surface, more extensive tree canopies, and buildings with reflective exteriors. Red areas are warmer with more paved surfaces, less tree canopy, and building exteriors that absorb and release heat (e.g., brick and cinderblocks). While the degree varies across different parts of the country, the general trend is the same: as one goes from green to red, the surface temperature goes up. Formerly-redlined areas are far more likely to contain heat islands.

Exercise for the reader. Are there heat islands in Arlington? What (HOLC) color are they?

As the global temperature warms, Arlington (like many other communities) will have to contend with heat islands. The treatment is likely to be area-specific, following patterns laid out in the HOLC’s maps from the early-20th century.

Written by Steve Revilak February 20, 2020

Budgeting the Curb

(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.

A curbside rain garden. The curb has been bumped out, and there are tall-growing plants and flowers between the curb and the sidewalk.

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.

A picture of Arlington High School. Next to the curb, the pavement is painted with the words "no parking - fire lane".

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

No parking zone in front of Broadway plaza. The plaza contains a number of trees and planters, and there are several storefronts behind the 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.

A crosswalk, where the curb has been "bumped out" to reduce the crossing distance for pedestrians.

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.

A station wagon parked in a handicap space. The space is painted blue, with a white border.

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 bluebikes station. The station has docking spaces for eleven 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 curb-side bus stop. The bus stop is marked with a sign. There are trees, planters, and storefronts in the photo.

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.

A bus priority lane. It's a wide roadway lane marked with red paint. Next to the lane is a sign that says "Parking lane - Buses Only 6am-9pm Mon-Fri. Bikes OK"

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.

A two lane road. There's one lane for vehicles in either direction, and bicycle lanes on either side. The right-most lane provides on-street parking.

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

An electric vehicle charging station, near the Park Ave Congregational Church. The spaces is marked with faded green and white paint. The vehicle charger is located behind two yellow bollards.

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.

A curbside parking space with a parking meter.

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:

A pair of curbside parking spaces that have been converted to an outdoor dining area. There are tables, chairs, umbrellas, and a wooden screen.

And in Arlington Heights:

A curbside dining space that's surrounded by orange traffic barriers. The restaurant has a sign with the words "The Heights Pub", and a black awning with the words "Gather, Eat, Drink".

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.

A street where the houses are approximately 10 feet above the sidewalk level. There are retaining walls next to the sidewalk, and stairways leading up to the houses. A row of parked cars sits alongside the curb.

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?