5 ZIP codes with 100 or more permits on homes in the City of Cambridge, October 2023 through September 2026. 02138 is the busiest with 5,892 permits (39% of the 15,278 in Cambridge). Each permit is counted at its property's ZIP code, for the 11 kinds of home work we track.
Busiest first. Top trade is the trade with the most permits in that ZIP code; contractors are distinct business names with at least one permit there. A ZIP code opens its page: permits by trade, the most active firms and usual filed values.
Source: City of Cambridge Inspectional Services permits (the city's per-type open-data permit files). The window is October 2023 through September 2026.
Counted: permits on homes for the kinds of work we track (electrical, remodel, addition & alteration, plumbing, gas fitting, HVAC & sheet metal, roofing, solar, demolition, fire sprinkler, new construction, siding) where the record names a contractor, placed by the ZIP code of the permit's address (or its parcel's). The pages with a ZIP code cover 15,268 of the 15,278 permits; 10 had no usable ZIP code.
Not counted: commercial work, trades we don't read, and owner-pulled permits. A ZIP code does not follow city or county lines; these count only permits in the City of Cambridge.