Cambridge’s Inspectional Services Department (ISD) is the primary authority for building, electrical, plumbing, gas, and mechanical permits and also enforces the City’s Zoning Ordinance. Permit applications are submitted through the City’s Online Permitting System, while zoning applications for variances, special permits, and appeals are handled through the same digital process and reviewed by the Board of Zoning Appeal when required.
Zoning compliance is checked before a building permit can be issued. Cambridge’s Zoning Ordinance controls permitted uses, building size and scale, parking, and other development standards, with additional rules applying in overlay districts and special planning areas. Some projects require a special permit from the Board of Zoning Appeal or Planning Board, while nonconforming proposals may require a variance.
Historic review is particularly important in Cambridge. Properties in historic districts, neighborhood conservation districts, designated landmarks, and other protected categories require review by the Cambridge Historical Commission before applicable building work proceeds. Cambridge also reviews demolition applications citywide for buildings more than 50 years old, and significant buildings can be subject to the City’s demolition-delay process.
Flood resilience and public-space impacts can create additional approvals. Cambridge has zoning standards addressing future flood risk, while construction staging or reserved curb space on City streets is handled through Department of Transportation Street Occupancy Permits. Excavation in the public right-of-way requires separate Public Works approval. Applicants can begin with the City’s Inspectional Services Department and then confirm zoning, historic, flood-resilience, and street-use requirements for the site.