Most residential projects in Massachusetts fail on sequence, not on merit. Filings have to happen in an order, each one gates the next, and several of the boards meet monthly.
The usual sequence
For a typical addition, garage or ADU on a conforming lot. Anything non-conforming inserts a zoning step near the front and adds two to four months.
| Step | Typical duration | |
|---|---|---|
| 01 | Feasibility — what the zoning allows, what the lot can carry | Before you spend on design |
| 02 | Zoning relief, if needed — ZBA special permit or variance | 2–4 months |
| 03 | Conservation Commission — if within 100 ft of a wetland or 200 ft of a stream | 1–2 months, runs in parallel |
| 04 | Board of Health — Title 5 septic review on unsewered lots | 3–8 weeks |
| 05 | Site plan review — Planning Board, where the bylaw requires it | 1–3 months |
| 06 | Construction documents — stamped drawings for permit | 3–8 weeks |
| 07 | Building permit — the application itself | 2–6 weeks |
| 08 | Trade permits — electrical, plumbing, gas, filed by the licensed trades | With construction |
| 09 | Inspections — footing, frame, rough, insulation, final | Through construction |
| 10 | Certificate of occupancy | On final sign-off |
Durations are planning-level ranges for an average Massachusetts municipality, not a commitment. Small towns with monthly board meetings run long; a few larger departments are faster than this.
Who issues what
| Authority | What it controls | |
|---|---|---|
| 01 | Building Department | Building permit, trade permits, inspections, certificate of occupancy. The final authority on code. |
| 02 | Zoning Enforcement Officer | Whether your project conforms. Usually the Building Commissioner wearing a second hat. |
| 03 | Zoning Board of Appeals | Special permits, variances, appeals of the ZEO. |
| 04 | Planning Board | Site plan review, subdivision, some special permits. |
| 05 | Conservation Commission | Wetlands Protection Act filings — RDA, NOI, Order of Conditions. |
| 06 | Board of Health | Title 5 septic, wells, some demolition. |
| 07 | Historic Commission | Demolition delay and exterior work in a district. |
What makes a permit take longer than it should
- An incomplete set. The reviewer stops at the first missing item and the clock restarts when you resubmit.
- Filing out of order — a building permit application before zoning relief is resolved.
- Missing the board meeting deadline by a day, which costs a month.
- An existing non-conformity nobody checked for, discovered at review.
- A septic system with no reserve capacity, discovered after the drawings are done.
Start with the sequence for your property
The free check returns the permitting sequence for your specific scope and town, in order, with the bylaw sections cited.