Boxborough sustainability fellow outlines specialized stretch code and grant opportunities ahead of fall town meeting

Becky Caruso, Boxborough’s KELP municipal fellow assigned to the Sustainability Committee, laid out the case on June 15 for the town to consider adopting the state’s specialized stretch code, a voluntary enhancement to the stretch energy code that applies only to new construction.

Caruso said the specialized code encourages energy‑efficient, all‑electric new buildings and requires measures such as pre‑wiring for future electrification and solar readiness. “The specialized stretch code does not significantly increase energy efficiency requirements beyond the updated stretch code,” she said, adding that the code aims to reduce greenhouse gas emissions and avoid costly retrofits for homeowners later.

The presentation placed the proposal in local context: Boxborough already follows the state’s stretch energy code. Caruso said about 60 Massachusetts towns had adopted the specialized stretch code as of June, including neighboring communities, and that Boxborough’s electric utility service from Littleton Electric makes electrification relatively cost‑effective for new construction.

On costs, Caruso cited Mass DOER case studies showing no added cost for all‑electric single‑family homes under the specialized code versus the updated stretch code; by contrast, a mixed‑fuel single‑family model used in the study showed an additional compliance cost of about $18,928 above the stretch code. For multifamily mixed‑fuel units, the study estimated roughly $7,579 in additional per‑unit costs compared with stretch code compliance.

Caruso used a prospective new fire station as an example of potential municipal impact, saying a specialized‑code design could raise upfront costs but materially reduce operating costs and emissions over time. She cited modelled annual energy costs of roughly $16,000–$20,000 under a specialized‑code design versus $35,000–$40,000 under the stretch code and an estimated roughly 80 percent reduction in greenhouse gas emissions; she also referenced more than $800,000 in estimated lifecycle savings over 30 years for that example.

Most of the board’s questions focused on local cost drivers and grant competitiveness. Board member Chris Dowy asked how Littleton Electric rates compare with Eversource or National Grid; Caruso said Littleton is substantially lower than Eversource, and staff noted that a municipal utility status affects certain incentive eligibility. On grants, Caruso and staff said adopting the specialized code is one of the Climate Leader Communities (CLC) requirements; achieving CLC status can make the town eligible for up to $150,000 for engineering/design and up to $1 million for implementation for high‑impact greenhouse gas projects. Caruso described those funds as competitive and recommended a phased use of existing Green Communities funds prior to pursuing CLC funding.

The board asked staff to follow up with technical clarifications on ADUs, how additions are defined, solar interconnection constraints with Littleton Electric, and whether AAB (Architectural Access Board) waivers might apply in some sidewalk/interconnection or site‑specific contexts. Caruso and the sustainability committee said they will continue outreach through the summer, expect to return with additional information in September, and may propose a warrant article at fall town meeting if the town wishes to opt in.

What’s next: staff and the sustainability committee will gather follow‑up details on interconnection and specific code definitions for ADUs and additions. If Boxborough pursues SSC adoption, the likely next steps are additional public hearings this summer and formal adoption via town meeting vote if the board and the public approve moving forward.