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Get ProEvery project in every city · from $79/mo

Cities
Boston
December 2025

Monthly permit report

Boston commercial building permits, December 2025

← November 2025 January 2026 →

81
Commercial & multifamily permits: 33
Projects with new permits: $52.4M
Declared value

Biggest projects in December 2025

By declared value.

9 Arch St
Issued Dec 11
$20M
Change of occupancy from Offices to Multi-family Dwelling for 110 units; ground floor Store occupancy to remain. Renovation of 11-story office condominium from an office use to…
multifamilyBuildingContractor not published
1 Congress St
Issued Dec 29 · 5 permits
$11.8M
Fit out of the 30th floor for a single tenant, scope includes minor demo, mechanical, electrical, plumbing and fire protection upgrades and architectural finishes.
commercialBuilding · ElectricalContractor not published
1188-1194 Bennington St

Boston building permits in December 2025: key facts

In December 2025, Boston issued 81 building permits on commercial and multifamily properties, on 33 projects, declaring $52.4M of work.
The busiest trade was electrical (32 permits), then general building (21).
The largest project was at 9 Arch St, with $20M declared.

Source: building permit records from official city open-data portals, checked daily. Data through October 28, 2026. How we count

Projects in this report

9 Arch StChange of occupancy from Offices to Multi-family Dwelling for 110 units; ground floor Store occupancy to remain. Renovation of 11-story office condominium from an office use to…multifamilyBuilding$20MDec 11
1 Congress StFit out of the 30th floor for a single tenant, scope includes minor demo, mechanical, electrical, plumbing and fire protection upgrades and architectural finishes.

Issued Dec 5

$5.5M

AT RISK FOUNDATION for ERT1462975 new Twenty-two (22) unit mixed use residential building with 1-Retail space at lower level. with 8 parking spaces.;Demolition of existing…

commercialBuildingContractor not published

Issued Dec 12

$4.5M

Consolidate 4 existing parcels into 1 single Lot. Existing parcel IDs = 0800823000, 0800824000, 0800825000, 0800826000. This is a companion case to ALT1703424.

commercialBuildingContractor not published

84-100 River St

Issued Dec 8 · 3 permits

$3.5M

Change occupancy from "retail" to "professional office". Construct tenant fit-out.\*Existing 2 Retail, Bank, Restaurant, Gym, Beauty Salon, Dental Office, Offices…

commercialBuilding · Fire protectionContractor not published

Issued Dec 1 · 12 permits

$2.2M

Interior alteration to existing tenant suite located on 19th floor of office building.

commercialBuilding · ElectricalContractor not published

Issued Dec 1

$1.6M

City of Boston Animal Shelter renovation property @26 Mahler Rd. Roslindale, Ma

commercialBuildingContractor not published

125-135 Congress St

Issued Dec 9

$1.2M

Renovation to the 3rd floor of 30 Federal St, including MEP, Sprinkler, FA and finishes and adding a small conference room.*Application assigned to FD on 10/29/25**LEGAL USE AND…

commercialBuildingContractor not published

170-170a Tremont St

Issued Dec 12 · 3 permits

$1.1M

Installation of interior finishes (flooring, tile, trim and paint) Installation of kitchen cabinetry and appliances in existing location. Installation of (2) bathroom finishes in…

multifamilyDemolition · Fire protection · OtherContractor not published

374 Commonwealth Av

Issued Dec 9

$236K

Removal of existing carpet in Basement, 1st floor, and 2nd floor, and installation of new, same model carpet to include tile work within the back hallway on the 1st floor.

commercialBuildingContractor not published

Permits by trade

Electrical32
Building21
Fire protection12
Plumbing4
Roofing2
Demolition2
HVAC / Mechanical1
MEP1

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commercialBuilding, Electrical

$11.8MDec 29

1188-1194 Bennington StAT RISK FOUNDATION for ERT1462975 new Twenty-two (22) unit mixed use residential building with 1-Retail space at lower level. with 8 parking spaces.;Demolition of existing…commercialBuilding$5.5MDec 5

134 Hampden StConsolidate 4 existing parcels into 1 single Lot. Existing parcel IDs = 0800823000, 0800824000, 0800825000, 0800826000. This is a companion case to ALT1703424.commercialBuilding$4.5MDec 12

84-100 River StChange occupancy from "retail" to "professional office". Construct tenant fit-out.\*Existing 2 Retail, Bank, Restaurant, Gym, Beauty Salon, Dental Office, Offices…commercialBuilding, Fire protection$3.5MDec 8

100 Federal StInterior alteration to existing tenant suite located on 19th floor of office building.commercialBuilding, Electrical$2.2MDec 1

26 Mahler RdCity of Boston Animal Shelter renovation property @26 Mahler Rd. Roslindale, MacommercialBuilding$1.6MDec 1

125-135 Congress StRenovation to the 3rd floor of 30 Federal St, including MEP, Sprinkler, FA and finishes and adding a small conference room.*Application assigned to FD on 10/29/25**LEGAL USE AND…commercialBuilding$1.2MDec 9

170-170a Tremont StInstallation of interior finishes (flooring, tile, trim and paint) Installation of kitchen cabinetry and appliances in existing location. Installation of (2) bathroom finishes in…multifamilyDemolition, Fire protection$1.1MDec 12

374 Commonwealth AvRemoval of existing carpet in Basement, 1st floor, and 2nd floor, and installation of new, same model carpet to include tile work within the back hallway on the 1st floor.commercialBuilding$236KDec 9

Other months: September 2026 · August 2026 · July 2026 · June 2026 · May 2026 · April 2026