Chelmsford, Massachusetts Building Permit Guide

Chelmsford’s Building Department/Code Enforcement Division, at the Town Offices on Billerica Road, issues building permits and the electrical, plumbing and gas permits for the town, and takes applications online through PermitEyes. A residential building permit is $150 for work up to $10,000, plus $15 for each $1,000 above that, and the review clock only starts once every required document is uploaded.

What requires a building permit in Chelmsford?

Work that constructs, alters, repairs, removes or demolishes a building, or changes its use, needs a permit from the Building Department before it starts. Chelmsford’s procedures page shows which jobs draw extra paperwork: a certified plot plan is required for every new building, addition, shed, deck, porch and pool, and town bylaw separately requires a permit from the Building Inspector to demolish any building in whole or in part.

Ordinary repairs and the other items on the state code’s exempt list in 780 CMR, section 105.2 need no building permit. When a roofed shed or accessory structure is permitted, its certified plot plan must show floor-area-ratio and lot-coverage figures.

What Chelmsford decides and what the state holds

The technical rules belong to the Commonwealth: 780 CMR, the State Building Code in its 10th edition, is written by the Board of Building Regulations and Standards and cannot be amended by Town Meeting. The trades follow their own state codes. What Chelmsford sets is the zoning bylaw (Chapter 195 of the town code), its wetlands bylaw (Chapter 187), the demolition delay (Chapter 16), the Center Historic District, the pool enclosure rule, the stormwater bylaw and the permit fees.

On energy, Annual Town Meeting voted on October 19, 2023 (Article 25) to adopt the Municipal Opt-in Specialized Energy Code as Chapter 26 of the General Bylaws, applying to residential and commercial buildings and enforced by the Inspector of Buildings or Building Commissioner. The department’s procedures page still describes the town as a Stretch Code community and links 2018 energy handouts; the bylaw, which is the adopted rule, puts the Specialized code in force.

Chelmsford building department: who handles permitting

The Building Department/Code Enforcement Division enforces the state building, electrical, plumbing, gas and sanitation codes together with the town’s bylaws, and handles zoning enforcement as well. Its head is the Building Commissioner and Zoning Enforcement Officer, Jose W. Negron. The division includes building inspectors, a plumbing and gas inspector and an electrical inspector, so every permit type is issued from the same office.

The Community Development Office (978-250-5231) supports the Planning Board, Conservation Commission and Zoning Board of Appeals, and the Health Department sits in Room 102 of the same building (978-250-5241).

Chelmsford permit types

PermitEyes handles building, electrical, gas, plumbing, mechanical, sheet metal, sign, tent and solid-fuel appliance (SFA) permits for licensed contractors and homeowners. Register for an account first, then build a PDF of the documents the procedures page lists so they can be uploaded with the application.

Residential permits

A house project needs a certified plot plan drawn to scale with distances to the lot lines; for additions and new construction a registered design professional must calculate floor area ratio and lot coverage on it, and an as-built plan may be required once the foundation is in. Framing plans show lumber, joist, header, door and window sizes and insulation, and any LVL or other engineered lumber needs an engineer’s stamp. Additions and remodels of heated space file a REScheck printout, and new homes need a HERS rating. The Fire Department must approve and stamp 3 sets of floor plans for smoke and carbon monoxide detector locations on new homes and on bedroom additions or alterations. Contractors upload their Construction Supervisor License, Home Improvement Contractor registration and the contract with the owner. A homeowner can apply under the state code’s homeowner exemption, but the town warns that acting as your own general contractor can cost the right to HIC arbitration and the Guaranty Fund.

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

Commercial permits

Nonresidential permits start at a $350 minimum, and a Final Cost Affidavit is submitted for commercial permits so the fee can be squared with the real cost. Interior work in commercial or industrial buildings needs the Fire Department’s stamped approval on 3 sets of floor plans. A new business also needs the $100 Maintain/Change of Use inspection before it opens, and the electrical schedule lists a $250 yearly maintenance fee for commercial sites.

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 Commissioner is also the zoning enforcement officer. The department warns that zoning limits new additions and second stories on pre-existing nonconforming structures. Variances and special permits go to the Zoning Board of Appeals; site plans and subdivisions to the Planning Board.
• Conservation Commission. The wetlands bylaw reaches 100 feet from wetlands, ponds and intermittent streams and 200 feet from perennial rivers. On lots of 40,000 square feet or more no building may go within 50 feet of a resource area (buffer zones, riverfront and flood land excluded), and no new impervious surface within 30 feet. Exterior work flagged in PermitEyes is approved online by the Commission.
• Board of Health, Title 5. Where DPW says a new lot cannot connect to sewer, the Health Department runs the Title 5 process in PermitEyes: a soil (perc) test application first, then a septic plan review for each lot, with extra Groundwater Protection Zone rules in that zone.
• Historic review. Buildings 75 or more years old go to the Historical Commission before a demolition permit; unless it finds them not significant, it holds a hearing within 60 days and can delay a preferably preserved building for up to 12 months. Illegal demolition can bar building permits on the lot for up to three years. Separately, exterior changes in the Chelmsford Center Historic District go to the Historic District Commission under chapter 40C.
• DPW. Sewer connections, trenches, road openings, driveways and land disturbance each carry a DPW permit.

Chelmsford permit costs and fees

The Building Department’s Permit Fees page lists the current charges, which are non-refundable once the permit issues.

For a house, both of the department’s pages give the same result: a $70,000 addition costs $150 plus $15 × 60, or $1,050, and the occupancy or completion certificate adds $150. For nonresidential work they differ: the procedures page charges $15 per $1,000 of the whole cost with a $350 minimum, while the fee page adds $15 per $1,000 only above the first $10,000. On a $200,000 fit-out that is $3,000 against $3,200, so budget for the higher figure.

DPW’s 2026 schedule covers work in the street: a residential sewer connection is $200 (commercial $300 per line), a sewer cut and cap $100, a drainage permit $200, a trench permit $50, a road opening or driveway $5 per linear foot with a $75 minimum, and land disturbance $200 (minor) or $300 (major).

Trade permits and who may pull them

The trade inspectors work inside the Building Department, so wiring, plumbing and gas permits are filed in the same PermitEyes account as the building permit.

• Electrical: filed by a Massachusetts-licensed electrician and inspected by the town’s electrical inspector under 527 CMR 12. A house job with one inspection is $80.
• Plumbing and gas: filed by a licensed plumber or gas fitter under 248 CMR and priced by fixture; a water heater swap is $50.
• Sheet metal and mechanical: a separate permit starting at $50.
• Fire Department: stamps detector layouts on house plans and commercial interiors before the building permit issues.

Off-hour shutdown inspections are available only by appointment and cost extra.

How to apply for a Chelmsford building permit

Review, corrections and what causes delay

Chelmsford states that its review time begins only when all required documents have been submitted online. The state code (780 CMR 105.3.1) then gives the building official 30 days from the application to grant or refuse the permit in writing. Most delays in Chelmsford trace back to a plot plan without FAR and lot-coverage figures, a missing Fire Department stamp, a Conservation flag in the portal, or plans that still follow the old Stretch code energy path.

Inspections in Chelmsford

Building inspectors take calls and visitors from 8:30 to 10:00 am, Monday to Friday, or by appointment. The plumbing, gas and electrical inspectors answer the office from 8:30 to 9:30 am and inspect from 9:30 am to noon. A missed appointment, or work that fails and needs another visit, can cost a $100 reinspection fee.

A typical house permit moves through footing and foundation (with an as-built plot plan if requested), rough framing and rough trades, insulation, and the finals. Every building project ends with a certificate of occupancy or completion, which carries its own fee, and a new business is not cleared to open until the change-of-use inspection is done.

Massachusetts building code

Chelmsford enforces the 10th edition of 780 CMR together with the Specialized Energy Code bylaw. FEMA’s Community Status Book lists the Town of Chelmsford (community 250188) as participating in the National Flood Insurance Program, with flood maps current from July 8, 2025.

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

Chelmsford permit search and official resources

Property files are not available through PermitEyes. Ask for them by email to the Building Department or by a public records request through the town’s online request form, or review the files in person at the department.

• Chelmsford Building Department/Code Enforcement
• Procedures for obtaining a permit
• Online permitting information
• PermitEyes portal for Chelmsford
• Building Department permit fees
• DPW 2026 permit fees
• Chapter 26, Specialized Energy Code bylaw
• Chapter 16, demolition of buildings
• Chapter 68, Historic District
• Chapter 187, Wetlands bylaw
• Community Development: Planning Board, ZBA and Conservation
• Board of Health Title 5 process for new development
• Chelmsford public records request
• Massachusetts State Building Code, 780 CMR

Chelmsford building permit FAQs

How much does a building permit cost in Chelmsford?

For a house, $150 for work up to $10,000 plus $15 per $1,000 above that; for commercial work the minimum is $350. A certificate of occupancy or completion adds $150.

Does Chelmsford use the Specialized energy code?

Yes. Town Meeting adopted the Municipal Opt-in Specialized Energy Code on October 19, 2023 as Chapter 26 of the bylaws, for residential and commercial buildings.

Do I need a plot plan for a shed in Chelmsford?

Yes, when the shed is permitted. The town requires a certified plot plan for sheds, decks, porches and pools, and roofed accessory structures must show FAR and lot coverage.

Can I tear down an old house in Chelmsford?

Buildings 75 or more years old go to the Historical Commission first. If it finds the building preferably preserved after a hearing, it can delay demolition for up to 12 months.

When are Chelmsford’s inspectors available?

Building inspectors from 8:30 to 10:00 am on weekdays or by appointment; the plumbing, gas and electrical inspectors from 8:30 to 9:30 am, with inspections until noon.

Can I still file on paper?

Yes, the department still accepts paper applications, but it no longer keeps blank forms in the office and encourages PermitEyes.

How do I get a property’s permit history?

Request it by email or a public records request, or review the files at the Building Department; it is not available in the online portal.

Simplify Chelmsford 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 Chelmsford permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.