Yarmouth, Massachusetts Building Permit Guide

Yarmouth’s Building Department, in Town Hall at 1146 Route 28, South Yarmouth, issues every building permit in town along with the plumbing, gas and electrical permits, and takes applications through the OpenGov portal, which routes them to each department that must sign off. House permits are priced by floor area under the schedule effective January 1, 2015: a new one- or two-family home is $0.55 a square foot with a $550 minimum.

Two local layers shape most Yarmouth projects. North of Route 6, the Old King’s Highway Historic District Committee reviews almost any exterior change, from paint and fences to additions and sheds. And while Phase 1 of the town’s sewer construction is still under way, the Health Department checks bedroom counts, Zone II wellhead limits and septic capacity before an addition goes ahead.

The Yarmouth Building Department serves the whole town and all of its villages. Barnstable and Dennis, on either side, have their own building departments.

What requires a building permit in Yarmouth?

The department’s own answer follows the state code: a permit is needed for construction, reconstruction, alteration, repair, removal or demolition of a structure, for any change of use, and for installing or altering equipment the State Building Code regulates. A plot plan is required for a new structure, an addition or a reconstruction.

What the town decides and what the state holds

Yarmouth enforces 780 CMR as the Board of Building Regulations and Standards writes it and cannot amend it. The town’s own levers are its fee schedule, the zoning bylaw, the wetlands bylaw (Chapter 143) and the Conservation Commission’s regulations, revised in 2026, the Board of Health’s septic and Zone II rules, the demolition-delay bylaw (Chapter 92) and the pool fence bylaw (Chapter 127). The Old King’s Highway district runs under the Old King’s Highway Regional Historic District Act, with Yarmouth’s own committee hearing local cases.

Yarmouth building department: who handles permitting

Building Commissioner Mark Grylls, who is also Director of Inspectional Services, heads the department. A deputy building commissioner and two local inspectors carry the building inspections, and the town has its own plumbing and gas inspector and electrical inspector. The department also enforces the zoning bylaw.

Permit types

Residential permits

Houses use the Residential Building Permit application for one- and two-family dwellings. The May 2026 checklist for new construction, additions and decks asks for a complete application with licenses, the workers’ compensation form and signatures; any recorded Zoning Board of Appeals decision; a site plan stamped by a land surveyor; construction drawings showing compliance with the 10th edition of the Massachusetts code; a HERS certificate for a new home, or REScheck or HERS where required for an addition; and supplier engineering data or an engineer’s stamp for steel beams, LVLs, trusses and I-joists. All attachments go in as PDFs. Roofing, siding and sheds use the shorter Express Permit.

Building or remodeling a home here? Alliance handles residential permit filing, so the crew isn't waiting on the counter.

Commercial permits

Commercial work files the Commercial Building Permit application, with a COMcheck for the energy code and a clearing permit. Buildings over 35,000 cubic feet need the initial and final construction control documents signed by a registered design professional. Larger projects follow the Site Plan Review Submittal Outline, and a change of use goes through the Use and Occupancy Permit Application. Seasonal businesses that house managers or staff on site use the Manager and Seasonal Employee Housing Permit form.

For tenant improvements and new commercial builds, Alliance handles commercial permit expediting through issuance. More on this: commercial building permits explained.

What comes before the building permit

• Zoning: the Building Department enforces the zoning bylaw, and variances and special permits go to the Zoning Board of Appeals; the recorded decision is part of the building application.
• Conservation Commission: under Yarmouth’s wetlands bylaw, work within 100 feet of a wetland or 200 feet of a perennial stream needs the commission’s approval, with a local filing fee on top of the state one; its next sessions are on November 5 and 19, 2026.
• Health and Title 5: the Health Department checks whether the existing septic system can carry added bedrooms. Inside a Zone II wellhead area, lots are generally held to one bedroom per 10,000 square feet, and an owner over the limit may have to record a bedroom deed restriction at the Barnstable County Registry of Deeds. A new septic design can take two to three months.
• Old King’s Highway district: every property north of Route 6 is in the district. Visible exterior work needs a Certificate of Appropriateness after a public hearing; work not visible from a public way can get a Certificate of Exemption without one; demolition needs a Certificate of Demolition.
• Demolition delay: a copy of any demolition application goes to the Historical Commission, which rules on significance within 10 business days and holds a hearing within 30 days; a significant building whose loss it finds detrimental cannot be demolished for at least 180 days.

Yarmouth permit costs and fees

The Building Department’s posted schedule took effect on January 1, 2015, and remains the one the department links in 2026. Fees are rounded to the nearest dollar, square footage is measured to the outside of the exterior walls, and the certificate of occupancy for new work is included in the building permit fee.

Worked example: an 800-square-foot addition to a house is 800 × $0.55 = $440, which is above the $350 minimum; a 400-square-foot addition ($220 by the rate) pays the $350 minimum. The May 2026 checklist lists a $60 application submittal fee. Plumbing and gas fees are on the department’s separate plumbing and gas fee sheet.

Trade permits and who may pull them

Yarmouth issues plumbing, gas and wiring permits only to Massachusetts-licensed plumbers, gas fitters and electricians, and its inspectors enforce 248 CMR and 527 CMR. Trade applications can be dropped at the public window from 7:00 am, ahead of the general opening at 8:30, and the inspectors keep early-morning office hours for questions. Sheet metal permits cost $50 for residential and $60 for commercial work, and commercial mechanical equipment is $60 per unit under the 2015 schedule.

On the building side, the application carries the license numbers of the construction supervisor and, for work on an existing owner-occupied home, the home improvement contractor.

Massachusetts has no general contractor license: the supervising individual holds a Construction Supervisor License, and contractors working on existing owner-occupied homes register as Home Improvement Contractors. Massachusetts rules

How to apply for a Yarmouth building permit

Review, corrections and what causes delay

Under 780 CMR 105.3.1 the building official has 30 days from filing to grant or deny the permit in writing. Yarmouth’s checklist warns that an incomplete application will be cause for denial, so a missing stamped site plan, energy certificate or engineering sheet sends the file back. The other common wait is outside the department: a septic redesign, a Conservation Commission hearing, or an Old King’s Highway hearing tied to the committee’s twice-monthly Monday meetings.

Inspections in Yarmouth

Building inspections are booked by calling 508-398-2231 ext. 1260 or 1261, or in person, at least one business day ahead, with the permit number; the schedule says inspections will be done within two business days of the request, citing 780 CMR 110.3. Photos are not accepted in place of any required inspection, and concealed work may have to be opened up if a stage is skipped.

The schedule runs foundation (before the slab and before backfill, with rebar and forms in place where the foundation is reinforced), pre-frame sheathing and tie-downs, frame after rough trades and fire stopping, insulation, and final after any duct and HERS testing. Before occupancy, the owner submits a final as-built plan showing decks and porches and, in a flood zone, an elevation certificate. Re-inspections cost $80.

Building and energy code in Yarmouth

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

Yarmouth’s checklist calls for drawings to the 10th edition of 780 CMR and a HERS certificate for every new home. Yarmouth’s code of bylaws has no energy-code chapter and the Building Department’s pages do not name an energy path, so check the state Department of Energy Resources municipal list of base, Stretch and Specialized adoptions, or ask the department, before design. FEMA lists Yarmouth as a participating National Flood Insurance Program community with maps current from July 16, 2014; flood-zone projects add a notarized flood zone packet, an elevation certificate and a design-professional foundation, and the department posts FEMA’s substantial improvement and substantial damage desk reference.

Yarmouth permit search and official resources

Applicants follow their own permits, sign-offs and inspection results in their OpenGov account. For older files and permits on another property, ask the Building Department at 508-398-2231 ext. 1261, or file a public records request with the town.

• Yarmouth Building Department — staff, hours and OpenGov link
• Yarmouth OpenGov permit portal — applications and status
• Yarmouth building permits and forms — residential, commercial and express applications
• Checklist for new construction, additions and decks — May 2026 submittal list
• Yarmouth inspection schedule — booking rules and stages
• Yarmouth building permit fee schedule — effective January 1, 2015
• Yarmouth flood zone information — elevation certificate and flood packet
• Old King’s Highway Historic District, Yarmouth — certificates and 2026 schedule
• Yarmouth Conservation Division — wetlands bylaw and 2026 regulations
• Yarmouth Health Department — septic permits
• Yarmouth Code Chapter 92, Historic Properties — demolition delay

Yarmouth building permit FAQ

How much is a building permit for a house in Yarmouth?

$0.55 per square foot with a $550 minimum for a new one- or two-family home, and $0.55 per square foot with a $350 minimum for an addition, under the 2015 schedule.

Do I need a permit for a shed in Yarmouth?

Yes. Every shed needs a zoning permit on the express form: $35 up to 150 square feet, or $0.30 per square foot ($45 minimum) above that. North of Route 6 a shed also needs Old King’s Highway review.

Can I add a bedroom in Yarmouth?

Only if the septic system and lot support it. The Health Department checks capacity and setbacks, and inside a Zone II area the general limit is one bedroom per 10,000 square feet of land.

Is my property in the Old King’s Highway district?

If it is north of Route 6, yes: the district runs from Route 6 to the Barnstable and Dennis borders.

How do I book an inspection in Yarmouth?

Call 508-398-2231 ext. 1260 or 1261, or ask at the office, at least one business day ahead with the permit number.

Who can pull plumbing or electrical permits in Yarmouth?

Only Massachusetts-licensed plumbers, gas fitters and electricians.

How long is a Yarmouth building permit good for?

Work must start within six months of issue or the permit is treated as abandoned.

Simplify Yarmouth permitting with Alliance Permitting

Alliance Permitting is a permit documentation and submission company in Massachusetts. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.

This guide is provided by Alliance Permitting for general information about Yarmouth permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.