Groton, Connecticut Building Permit Guide

In the Town of Groton, Inspection Services, part of the Office of Planning and Development Services, issues building, electrical, plumbing and mechanical permits and certificates of occupancy, and you apply, pay and request inspections through the Town’s Citizen Self Service (CSS) portal. Two places inside the town permit on their own: the City of Groton, through its Building and Zoning Department and PermitLink, and the Groton Long Point Association, whose building official issues all building permits there and the residential trade and demolition permits.

Inspection Services works from 134 Groton Long Point Road, the same building as the Town’s planning, zoning and wetlands staff. The Town had about 39,100 people in the Census estimate for 2025, of whom about 10,200 live in the City of Groton and about 500 in Groton Long Point. The Town’s planning page also lists the Noank Fire District, with the City and Groton Long Point, as a separate jurisdiction for zoning questions.

What requires a building permit in Groton?

Inspection Services enforces the building, electrical, plumbing and mechanical codes, so the permit list is the State Building Code’s: building, enlarging, altering, repairing, moving or demolishing a building, and installing or changing electrical, gas, mechanical or plumbing systems, unless the work is on the code’s exempt list. The division also enforces the State Demolition Code, the Town’s historic district regulations, the rental housing code and the property maintenance code.

What the town decides and what the state holds

The Town sets its permit fees in section 5-1 of the Town Code, which lets the Town Council change them by resolution, runs the CSS portal and decides how plans are routed to its planning, wetlands and coastal staff. The City of Groton and the Groton Long Point Association make those choices for themselves; the code and the trade licenses are the state’s.

Connecticut has one State Building Code: the code itself sets which work needs a permit and which is exempt, every town’s building official is licensed by the State Building Inspector, and there is no county government. Connecticut rules

Groton building department: who handles permitting

Inspection Services issues permits, inspects work at each stage of construction and issues certificates of occupancy; it also takes zoning, building, housing code and blight complaints and processes appeals to the Building Code Board of Appeals and applications to the Historic District Commission. Its zoning official issues certificates of zoning compliance. The Planning division supports the Planning and Zoning Commission, the Zoning Board of Appeals and the Inland Wetlands and Conservation commissions and enforces the Coastal Area Management Act. The Ledge Light Health District permits septic systems, and plans for buildings other than one- and two-family houses go to the district fire marshal.

Inside the City of Groton, the Building and Zoning Department under its Director of Building and Zoning takes building permits through PermitLink, supports the City’s Planning and Zoning Commission, Zoning Board of Appeals, Conservation Commission and Eastern Point Historic District Commission, and posts its own forms for certificate of occupancy sign-offs, tenant changes of use and home-based businesses. In Groton Long Point the Association’s building official issues all building permits, handles the electrical, plumbing, heating, air conditioning and demolition permits for residential work, reviews plans, inspects the work and issues a certificate of occupancy or acceptance at the end; its permits have been online through a GovOutreach site, and its zoning regulations were revised in August 2026.

Permit types

Residential permits

House projects are filed in CSS after a one-time registration that ties the account to a single email address, which then receives every status update, invoice and notice. The Apply tab lists the permit types, the My Work tab holds your permits, plans, inspection history and invoices and is where you request inspections, and the Map tab lets you start a permit from the parcel on the Town’s GIS. Where an address returns several results, as with new lots, pick the parcel with the right owner’s name. A house on septic also needs Ledge Light’s review of additions, pools, decks, garages and other accessory structures.

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

Commercial permits

The division’s commercial plan requirements apply to every building other than a one- or two-family detached house: three complete sets of construction documents including site plans, two for building inspection and one for the district fire marshal, plus one to Ledge Light for a restaurant or food service; sheets no larger than 30 by 42 inches; every sheet sealed by a Connecticut registered design professional; and a code analysis covering use group, construction type, height and area, egress, fire protection, accessibility, energy, special inspections and third-party review for threshold buildings. The sheet’s section numbers come from the 2018 code, which the 2022 code has since replaced. Staged reviews with the building official, fire marshal and health inspector can be held at concept and at 50, 70 or 90 percent design.

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

What comes before the building permit

Zoning comes first: the zoning regulations were reissued with changed tables on July 15, 2026, and the zoning official confirms compliance. Projects near wetlands and watercourses go to the Inland Wetlands Commission, and shoreline work in this coastal town goes through coastal area management review by the Planning division. In the Town’s historic districts a certificate of appropriateness from the Historic District Commission comes before the permit. The City of Groton and Groton Long Point run their own zoning, and the Town refers Noank zoning questions to the Noank Fire District.

Groton permit costs and fees

Section 5-1 of the Town Code sets the Town’s building and mechanical permit fee at $20 for the first $1,000 of cost and $10 for each further $1,000 or part, the codified rate, effective January 1, 1999, with the same rates for demolition and a certificate of occupancy fee of 2% of the building permit fee, at least $10. The same section lets the Town Council amend fees by resolution kept on file with the Town Clerk, and the CSS invoice shows the amount due. The City of Groton charges under its own resolution.

Worked example (City of Groton). A $30,000 renovation of a house inside the City pays $42 for the first $1,000 and 29 × $15 ($435) for the rest, $477, plus $7.80 state education fee: $484.80. Each trade permit is charged the same way on its own value. In the rest of the Town the CSS invoice gives the amount under section 5-1 and any later Council resolution.

When paying the Town in person, bring the invoice number from CSS, not just the permit number or address.

Trade permits and who may pull them

Electrical, plumbing and mechanical permits are issued by the same Inspection Services staff and filed in CSS under their own permit types, each with its own inspections. In the City of Groton, electrical, HVAC, plumbing, mechanical and sprinkler permits are charged at the same rate as building permits; in Groton Long Point the Association’s building official issues the residential trade permits.

The Department of Consumer Protection’s online lookup shows whether a contractor’s license or registration is current.

How to apply for a Groton building permit

Review, corrections and what causes delay

Filing with the wrong office costs time: a City or Groton Long Point parcel is permitted by its own building official, not in the Town’s CSS. On commercial work, plan sets missing the code analysis, seals or the fire marshal’s copy slow the review, which is why the division offers staged reviews before submission. A blighted property with a complete building permit application pending is exempt from the Town’s blight ordinance for 90 days, which gives owners a window to start repairs.

Inspections in Groton

Inspections are requested in CSS from the My Work tab, where the inspection history for each permit is kept. The building officials inspect each project at the different stages of construction, building, electrical, plumbing and mechanical alike, and issue the certificate of occupancy when the work passes. Inspection Services also carries out housing code inspections of rental property on request through the zoning official.

Under section 5-2 of the Town Code, the building official can order an unfit structure repaired or removed, presumed unreasonable to repair when the cost of repairs exceeds 50 percent of its replacement value or it has stood vacant six months after placarding; the owner may choose to repair it within up to six months or ask the Building Code Board of Appeals for a hearing.

Groton permit search and official resources

The CSS Search tab finds permits, plans, inspections and licenses by number without logging in, but only for records entered since the system started in July 2023; for older records, ask Inspection Services or file a public information request, which CSS also accepts. The Town, the City of Groton, Groton Long Point and the Noank Fire District each take part in the National Flood Insurance Program, all on flood maps dated August 5, 2013, and the Town Council serves as the Town’s flood and erosion control board.

• Town of Groton Inspection Services
• Town of Groton applications and permits: CSS guide and payment rules
• Town of Groton Citizen Self Service portal
• Town of Groton Planning and Development staff contacts
• Town of Groton commercial building plan requirements
• Town of Groton planning, zoning and wetlands
• Town of Groton zoning, wetlands and subdivision regulations
• Town of Groton Code: chapter 5, building fees
• City of Groton Building and Zoning Department
• City of Groton permit fee schedule, Resolution R-24-6-95
• Groton Long Point Association building and zoning
• Groton Long Point permit fees per $1,000, updated September 2024
• Ledge Light Health District: septic and B100a reviews
• FEMA Community Status Book for Connecticut
• Office of the State Building Inspector
• Connecticut Department of Consumer Protection: licenses and registrations

Groton building permit FAQ

Who issues building permits in Groton?

Town of Groton Inspection Services at 134 Groton Long Point Road, except inside the City of Groton, which has its own Building and Zoning Department, and Groton Long Point, whose Association building official issues all building permits there and the residential trade and demolition permits.

How do I apply in the Town of Groton?

Through the Citizen Self Service portal: register once with an email address, apply under the Apply tab, upload plans and pay the invoice online or in person.

How much is a building permit?

The Town Code sets $20 for the first $1,000 and $10 for each further $1,000, amendable by Council resolution; the City of Groton charges $42 and $15 per $1,000 under Resolution R-24-6-95, plus 26 cents per $1,000 for the state.

Can I look up an old permit online?

Only records entered since July 2023 are in CSS; older permits come from Inspection Services or a public information request.

Is there a fee for paying online?

Yes. Card payments carry 3.95% with a $2.50 minimum, and ACH payments $1.95.

What does a commercial permit need?

Three sealed sets of construction documents with site plans, one of them for the district fire marshal, a code analysis and, for food service, a set for Ledge Light.

Simplify Groton permitting with Alliance Permitting

Alliance Permitting is a permit documentation and submission company in Connecticut. 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 Groton permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.