Derby, Connecticut Building Permit Guide

In the City of Derby, the Building Department at City Hall issues building, electrical, plumbing, HVAC, sign and demolition permits, and applications go through the city’s PermitLink portal with digital plans. Under chapter 64 as the Board of Aldermen replaced it on December 8, 2022, a permit costs $20 for the first $1,000 of estimated cost and $15 for each further $1,000, plus the state fee of 26 cents per $1,000. Zoning fees, property taxes and sewer (WPCA) charges must be paid in full before you apply.

The department works from City Hall at 1 Elizabeth Street, on 203-736-1481, with Joseph Ballaro as Building Official. Its counter is open 8:30 a.m. to 2:00 p.m. Monday to Thursday and 8:30 a.m. to 12:30 p.m. on Friday, shorter than City Hall’s own hours, and anyone who needs a particular building official should call at least 48 hours ahead. Inspections take place on Tuesdays and Thursdays between 10:00 a.m. and noon. Derby is a city of about 12,900 people (Census estimate for 2025) where the Naugatuck River meets the Housatonic, and one building office covers all of it.

What requires a building permit in Derby?

Derby’s fee ordinance and application cover building permits for new homes, additions, alterations, repairs, garages, sheds and pools, and separate electrical, plumbing, HVAC, sign and demolition permits; the application says outright that electrical, plumbing and HVAC permits must be obtained separately. A deed must be on file at City Hall before a permit is valid, and permits for trade work go only to subcontractors holding the right Connecticut license.

The zoning office’s rule is simple: you cannot receive a building permit without a zoning permit. Derby also requires an occupancy permit from the Building Official before an apartment in a building of two or more units is occupied after a vacancy, unless the owner lives in a building of two units or fewer or the building was built or substantially rebuilt within the previous ten years.

What the city decides and what the state holds

Derby sets its permit fees and valuation rules by ordinance, requires taxes, zoning fees and sewer charges to be paid first, runs its own occupancy permit for rental units, and limits building permits to lots on accepted streets under its code. The building code, the exemptions from it and the licensing of contractors and building officials are state law.

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

Derby building department: who handles permitting

The Building Department reviews applications, issues permits, inspects the work and issues certificates; the Building Official is also the city’s blight enforcement agent and ADA coordinator. The Zoning Enforcement and Wetland Division, reached on the same number, reviews and issues zoning and wetlands permits and staffs the Planning and Zoning Commission, the Zoning Board of Appeals and the Inland Wetlands Commission. The Fire Marshal’s office in City Hall enforces the state fire code and the city’s fire ordinances, and the Naugatuck Valley Health District in Seymour handles septic systems and wells.

Permit types

Residential permits

PermitLink lists separate application paths for Building Services, Zoning and Wetlands, the Fire Department, Public Works and the Board of Health. The building application asks you to submit plans as PDFs, to keep a copy of the approved plans on site at all times, and to install smoke and carbon monoxide detectors as state law requires; it also asks whether the property is on city sewer or a septic system and city water or a well, with structural details for footings (at least 42 inches below grade), framing, chimney, siding and roofing. A residential plan review costs $50 under the department’s 2022 schedule.

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

Commercial permits

Commercial jobs use the same fee rate with a $350 commercial plan review on the department’s schedule, and the schedule notes that fire watch, where the city ordinance requires it, must be paid in advance. The 2022 sheet lists a $200 administrative fee for commercial work started without a permit, but the replaced chapter 64 sets a fine of twice the permit fee, at least $500. The Fire Marshal’s office enforces the state fire codes and the city’s fire ordinances, and the Fire Department has its own application path in PermitLink.

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 comes first. The city’s seven-step guide to a zoning permit says that if wetlands lie within 200 feet of the property, the zoning application will not be processed until the Inland Wetlands Commission approves the work; a wetlands approval and a zoning permit are each valid for five years. The zoning permit needs an A2 site plan, architectural drawings and either a WPCA sewer application or the health district’s septic and well approval. Taxes, zoning fees and WPCA charges must be paid in full before the building application goes in.

Derby permit costs and fees

On December 8, 2022 the Board of Aldermen voted 5 to 3 to repeal and replace chapter 64, the city’s building construction ordinance; the minutes of that meeting print the adopted text, whose section 64-4 sets the fees and a schedule of values used to check the estimated cost. The City Hall ordinance compilation still shows the 2015 version, and the Building Department’s 2022 fee sheet differs in places, noted in the table.

The schedule of values sets figures per square foot or per roofing square for checking the estimate: $150 per sq ft for new habitable space on the first and second floors, $65 for finished basements, attics and garages, $100 for a gut renovation, $30 for an open deck and $50 for a covered one, $100 per square for a re-roof and $200 to strip and re-roof, and $15,000 for a chimney and fireplace. The estimate must be at least 80% of the actual cost to avoid a penalty, and new construction is valued at between $150 and $250 per sq ft. Worked example: a job estimated at $20,000 pays $20 for the first $1,000 and 19 × $15 ($285) for the rest, a $305 permit, plus $5.20 in state fee. The 2022 application lists a $55.26 minimum for any permit.

Credit card payments carry a $3.95 fee for Visa debit and 2.5% for other cards.

Trade permits and who may pull them

Electrical, plumbing and HVAC permits must be obtained separately from the building permit, at the same $20 and $15 rate, and the application states that permits are issued only to subcontractors who hold the required State of Connecticut license. Contractors are licensed by the Department of Consumer Protection, which also registers home improvement and new home construction contractors.

How to apply for a Derby building permit

Review, corrections and what causes delay

Under state law the building official has 30 days from the date of application to issue or refuse a permit. Derby’s application adds its own clock: an application is treated as abandoned six months after filing unless it is being pursued or a permit has been issued, with extensions of up to 90 days for reasonable cause. Files stall most often on unpaid taxes or WPCA charges, a missing zoning permit, a missing deed, or an estimate below the city’s schedule of values. The city takes applications through PermitLink; state law lets an applicant file in person, by mail or by email in the manner the building official sets, so call 203-736-1481 if you cannot use the portal.

Inspections in Derby

Inspections run on Tuesdays and Thursdays from 10:00 a.m. to noon. The application sets out the order for a new house: footings before concrete is poured; the foundation after waterproofing and footing drains and before backfill; rough framing, wiring, plumbing and heating before insulation and sheet rock; insulation; and a final once all work is done, the septic system is complete with its as-built drawing on file and any well is installed and its water tested.

A permit becomes invalid if work stops for six months, and every permit lapses two years after its date unless renewed with the fees paid again. Demolition needs at least 24 hours’ notice to the department before work starts, removal story by story with debris wetted down, a shed covering for buildings over 40 feet tall and the site graded with compacted fill; the packet’s checklist asks for disconnect letters from Eversource or United Illuminating, Aquarion or the Regional Water Authority and Frontier, asbestos abatement, and the health district’s release for any well or septic system.

Derby permit search and official resources

PermitLink’s public page lets you search by street and house number for permits on a property. Derby sits at the meeting of the Naugatuck and Housatonic rivers and takes part in FEMA’s flood insurance program with maps dated May 16, 2017; its Zoning Enforcement and Wetland Division posts the zoning map and the zoning regulations, updated to June 27, 2025, that apply to those riverside lots. The city’s code on eCode360 includes legislation only through October 15, 2013, and the City Hall compilation stops at the 2015 fee text, so the current chapter 64 is the one printed with the December 8, 2022 minutes linked below.

• Derby Building Department
• Derby PermitLink: apply and search permits
• City of Derby ordinances, 2006 compilation (2015 fee text)
• Building Department fee schedule, 2022
• Building permit application, 2022
• Demolition permit packet, 2022
• Zoning regulations and zoning permits
• Seven steps to a zoning permit
• Inland Wetlands Commission
• Derby Fire Marshal
• Board of Aldermen, December 8, 2022: chapter 64 replaced (agenda and minutes)
• Naugatuck Valley Health District: septic and wells
• FEMA Community Status Book for Connecticut
• Office of the State Building Inspector
• Connecticut Department of Consumer Protection

Derby building permit FAQ

Who issues building permits in Derby?

The City’s Building Department at City Hall, 1 Elizabeth Street, 203-736-1481. Joseph Ballaro is the Building Official.

How much is a building permit in Derby?

$20 for the first $1,000 of estimated cost and $15 for each further $1,000, plus 26 cents per $1,000 in state fee. The 2022 application lists a $55.26 minimum for any permit.

When are inspections?

Tuesdays and Thursdays between 10:00 a.m. and noon. Call 203-736-1481 to book.

Can I get a building permit before zoning?

No. The city’s zoning guide says you cannot receive a building permit without a zoning permit, and wetlands approval comes first if wetlands are within 200 feet.

Do I need anything paid up first?

Yes. Zoning fees, property taxes and WPCA sewer charges must be paid in full before you apply, and the deed must be on file at City Hall.

Do landlords need a permit between tenants?

For buildings of two or more units, an occupancy permit from the Building Official is required after a vacancy, unless the owner lives in a building of two units or fewer or the building is less than ten years old or newly rebuilt.

How long does a permit last?

It lapses if work stops for six months and becomes invalid two years after its date unless renewed with the fees paid again.

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