Boston ADU Permit Fees & Cost Calculator
Boston requires building permits for ADUs through Inspectional Services, and some projects may also need Zoning Board of Appeal review. The available search results did not provide an official Boston fee schedule for ADU-specific permit, plan review, or utility charges, so exact fees should be verified directly with the city and relevant utilities.
Free ADU fee calculator
Estimate local ADU fees
Step 1 of 5: Location
The calculator uses staged city data from the ADUFee database with visible confidence levels and dated source tracking.
Fee overview
No official Boston ADU fee schedule was surfaced in the search results.
Secondary sources may mix permit fees, soft costs, and construction costs; those should not be treated as official city fees.
Utility fees may vary by provider and service upgrade scope and must be verified separately.
The request is for ADU-related fees, not total construction cost.
Boston-specific official fee schedules were not available in the provided search results, so numeric fees are left null unless directly supported.
Because Boston is in Massachusetts, statewide ADU size and zoning rules may affect feasibility, but they do not provide the fee amounts requested here.
FAQs
Are Boston ADU fee estimates official?
No. ADUFee.com provides planning estimates only. Final fees are set by the city, utility providers, school district, and other agencies.
What sources are used for Boston?
The database stores city, state, utility, school, county, and other source links where available. Each estimate should still be verified locally.
Can ADU fees vary within Massachusetts?
Yes. Permit, utility, school, inspection, and impact fees can vary by jurisdiction, parcel, project size, utility provider, and local interpretation.