Lynn's Department of Inspectional Services at City Hall, 3 City Hall Square, permits and inspects construction for the largest city on the North Shore under the same state building code that applies across the Commonwealth. The department issues the building permit; the city's wiring and plumbing inspectors permit and inspect their own trades under the state electrical and fuel gas and plumbing codes; and the zoning ordinance is administered locally under the state Zoning Act.
Two local realities shape most Lynn projects. The first is the counter: City Hall runs late on Tuesdays, to eight in the evening, and closes at half past 12 on Fridays, so a filing planned for Friday afternoon is a Monday filing. The second is water. Lynn's harbour frontage, the Saugus River and the marshes behind the shoreline put a great deal of the city inside the conservation commission's Wetlands Protection Act jurisdiction, where an order of conditions is a hearing rather than a counter transaction and precedes the building permit.
This guide covers the City of Lynn. Swampscott, Saugus, Salem, Nahant, Peabody and Lynnfield run their own building departments under the same state code.
Late on Tuesday, gone by lunchtime on Friday. City Hall's counter runs to 8:00 pm on Tuesdays and closes at 12:30 pm on Fridays. On a project that needs the building, wiring and plumbing inspectors booked separately, a lost Friday afternoon compounds across three offices — and Tuesday evening is the one slot that suits a working contractor.
What requires a building permit in Lynn?
What is local in Lynn is the building department, the fee schedule, zoning, and the conservation commission's coastal and riverfront jurisdiction.
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- Any construction, reconstruction, alteration, repair, removal or demolition, and any change of use or occupancy
- Work in the wetlands, riverfront or coastal floodplain areas, which needs the conservation commission's order of conditions before the permit
- Electrical work under the state electrical code and plumbing and gas work under the state fuel gas and plumbing code, on separate permits
- New buildings, additions and any structural work on an existing building
- Alterations, repairs and reconstruction under the existing building provisions, and any change of use or occupancy
- Decks (except small, low, freestanding ones), sheds over 200 square feet at a one- or two-family home or 120 square feet elsewhere, swimming pools 24 inches deep or more, and solar installations
Often exempt
- Ordinary repairs that do not alter structure, egress or systems
- Ordinary repairs that do not alter structure, egress or systems
- Painting, wallpapering, flooring, cabinets and similar finish work
- Small items on the code’s exempt list, such as fences up to 7 feet and retaining walls up to 4 feet
- Work on a building owned by the Commonwealth, which the State Building Inspector enforces rather than the town
What is actually local, and what is not
The code is the Commonwealth's and cannot be amended locally. Lynn's layer is the building department itself, its fee schedule and filing route, the zoning bylaw or ordinance and the zoning enforcement that precedes the permit, the conservation commission's wetlands jurisdiction under the Wetlands Protection Act, and the conservation commission's jurisdiction across the harbour, river and marsh frontage that reaches much of the city.
Massachusetts has one State Building Code, 780 CMR, for every city and town; towns cannot rewrite it, though many opt into a stricter energy code. The trades run under their own state codes. Massachusetts rules
Who handles permitting in Lynn?
The Department of Inspectional Services is the enforcing office, with the building commissioner or inspector of buildings as building official under the state code and the city's wiring and plumbing inspectors covering their own trades. The zoning board of appeals hears variances and special permits under the state Zoning Act, the planning board handles site plan review, and the conservation commission administers the Wetlands Protection Act across the city's extensive water frontage.
| Detail | Information |
|---|---|
| Department | City of Lynn Department of Inspectional Services |
| Office | City Hall, 3 City Hall Square, Room 405, Lynn, MA 01901 |
| Phone | (781) 598-4000 (City Hall). Inspection lines: building (781) 586-6815, electrical (781) 586-6714, plumbing and gas (781) 710-7459 |
| Hours | Monday, Wednesday and Thursday 8:30 am to 4:00 pm; Tuesday to 8:00 pm; Friday to 12:30 pm |
| Trades | City wiring and plumbing inspectors under the state codes; applications and fees through the ISD online portal, with a $25 administrative fee on paper applications since January 1, 2025 |
| Energy | Stretch energy code; the city has not adopted the Specialized opt-in code |
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Residential permits
A Lynn house project files with inspectional services against the state code and the city's zoning ordinance, with the supervising individual's Construction Supervisor Licence and, on residential work for an owner-occupant, the contractor's Home Improvement Contractor registration. In the city's dense triple-decker neighbourhoods a change of occupancy brings the existing building provisions and their fire protection requirements into play, and a homeowner pulling their own permit signs the affidavit that waives Guaranty Fund protection.
Commercial permits
Commercial and waterfront work in Lynn clears zoning and, where the ordinance requires it, site plan review, then the building permit, with the conservation commission's order of conditions in hand where the site touches a resource area. The city's harbourfront redevelopment parcels carry their own approval histories that the department checks against the application.
Zoning, conservation and the 30-day clock
The approvals that run ahead of the building permit are the local ones: zoning sign-off under Lynn's bylaw or ordinance, and, where the work is within 100 feet of a wetland or within the riverfront or floodplain areas, an order of conditions from the conservation commission under the Wetlands Protection Act, which is a hearing rather than a counter transaction. In Lynn the harbour, the Saugus River and the marshes bring the conservation commission's Wetlands Protection Act jurisdiction and coastal floodplain review across much of the city, and the state's tidelands licensing reaches the waterfront parcels. Appeals from the building official go to the local zoning board of appeals on zoning matters and to the State Building Code Appeals Board on code matters.
Massachusetts has no general contractor licence: the supervising individual holds a Construction Supervisor Licence, and contractors working on existing owner-occupied homes register as Home Improvement Contractors. Massachusetts rules
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Fees follow the city's schedule, with the trades charged separately under the state codes and land use applications charged by their own boards.
| Item | Fee or rule |
|---|---|
| Building permit | City schedule by project type and valuation |
| Wiring permits | Filed with and inspected by the city's wiring inspector under the state electrical code |
| Plumbing and gas permits | Filed with and inspected by the city's plumbing inspector under the state code |
| Conservation | Wetlands Protection Act filing fees where the work is in a resource area |
| Zoning relief | Zoning board of appeals application under the state Zoning Act |
| Certificate of occupancy | Issued after the final inspections on new buildings and changes of use |
The order of conditions is a hearing. Where a Lynn project sits within 100 feet of a wetland, in the riverfront area or in the coastal floodplain, the conservation commission's order of conditions comes before the building permit — and it is issued after a public hearing, not over a counter. On this shoreline that is most of the harbour side of the city, and the commission's meeting calendar sets the schedule.
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Permit required
- Wetlands, riverfront and coastal work — the conservation commission's order of conditions before the permit
- Electrical — state-licensed electrician; separate wiring permit under 527 CMR 12
- Plumbing and gas — state-licensed plumber or gas fitter; separate permits under 248 CMR
- Sheet metal work — state sheet metal licence where the work falls under it
- Fire protection and alarms — fire department plan review through the building permit, plus any fire department permit under 527 CMR; alarms by a state-licensed systems contractor
Typically exempt
- Fixing a leaking faucet or valve, clearing a blocked drain, or adjusting gas appliance controls, which need no plumbing or gas permit
Trade work is permitted separately and inspected by the municipality’s own wiring and plumbing inspectors under the state codes. Massachusetts rules
How to apply for a Lynn building permit
Zoning sign-off under the local bylaw or ordinance, and any variance or special permit the project needs, must come before the building permit.
Work in or near wetlands, rivers or land that floods needs conservation commission approval under the Wetlands Protection Act, usually an order of conditions, before work starts.
The Construction Supervisor Licence of the supervising individual, and the Home Improvement Contractor registration where the work is on an existing owner-occupied home of one to four units.
The building official reviews the documents against 780 CMR and the energy code the town has adopted.
Fees are the town's own and are due before issuance; trade permits are filed separately.
Footing to final, with the wiring and plumbing inspectors on their own trades, then a certificate of occupancy for a new building or change of use, or a certificate of completion for other work.
Review, corrections and what actually causes delay
Lynn's building official acts on a complete application within 30 days under the state code. What delays a file here is a conservation filing started after design, a Friday-afternoon submission that becomes a Monday one, and trade inspections booked as though one office covered them.
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Inspections follow the code's sequence — footing and foundation, frame, insulation and final — with the wiring and plumbing inspectors covering their own trades, and are requested from the building department by permit number. Work that passes final receives a certificate of occupancy for new buildings and changes of use, or a certificate of inspection where the code requires one. Buildings in the use groups listed in 780 CMR Section 110 also carry periodic inspections, with proof of maintenance filed with the building official. Lynn inspects in the code's sequence through inspectional services, with the city's wiring and plumbing inspectors booking their own trades and the certificate of occupancy following the finals.
Lynn permit search and official resources
- Lynn Department of Inspectional Services — the department, its permits and its hours
- Massachusetts State Building Code, 780 CMR — the 10th edition the department enforces
- Massachusetts energy code adoption by municipality — which code each city and town has adopted
- Massachusetts State Building Code, 780 CMR — the 10th edition and its Massachusetts amendments from the Board of Building Regulations and Standards
- Home Improvement Contractor registration — the consumer-protection registration and Guaranty Fund
- Construction Supervisor Licence — the examined licence held by the individual supervising the work
Inspections are where schedules slip.
Get a free quote →Frequently asked questions
When is the Lynn permit counter open?
Monday, Wednesday and Thursday through the working day, to 8:00 pm on Tuesdays, and closing at 12:30 pm on Fridays.
Do I need the conservation commission?
Where the work is within 100 feet of a wetland, in the riverfront area or in the coastal floodplain — which covers much of Lynn — the commission's order of conditions comes before the building permit.
Which energy code applies?
Lynn has been a Stretch energy code community since January 1, 2020; it is not among the municipalities that have adopted the Municipal Opt-in Specialized code.
Who permits electrical and plumbing work?
The city's wiring inspector under the state electrical code and the plumbing inspector under the state fuel gas and plumbing code, each separately from the building permit.
Can a homeowner pull the permit?
On their own one- or two-family home, under the Construction Supervisor Licence exemption — signing the affidavit waives the Guaranty Fund protection a registered contractor's permit would carry.
Which building code edition applies?
The 10th edition of the Massachusetts State Building Code, 780 CMR, in effect since October 11, 2024 and the only code in force since July 1, 2025.
Simplify Lynn permitting with Alliance Permitting
Lynn's water reaches further inland than most people expect, and its counter closes earlier. We settle the conservation question at the parcel stage, file inside the week's real hours, and book the three inspectors as three separate calls.
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Send us the scope and the parcel. We confirm the review path with the Lynn Department of Inspectional Services, assemble the submittal, file it, and track it through issuance — corrections included.
More Massachusetts permitting guides
More Massachusetts permitting guides
This guide is provided by Alliance Permitting for general information about Lynn permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.