Grant County, Kentucky Building Permit Guide

Grant County has its own building department. The county building inspector, who is also its plan reviewer, issues building permits in the county (859-824-9608), inspects every new home three times and enforces the county zoning regulations alongside the Kentucky codes. Applications go on the county’s “Application for Building & Site Permit”, revised April 2, 2026, with two scaled sets of plans, and a certificate of occupancy is required before anyone moves in.

What requires a building permit in Grant County?

The county’s permit form is the clearest list of what it permits. It covers four kinds of work, a new build, an addition, a remodel and a demolition or removal, on a wide range of structures.

The application is signed by the owner or lessee, who agrees to comply with the building code and zoning ordinance. Any violation of the building or zoning rules makes the permit void, so a project that breaks setbacks can lose its permit after issue.

What the county decides and what the state holds

Kentucky’s building codes are uniform, so the county’s role is to run the inspection program and to enforce its own zoning regulations, which the building department treats as part of the same job. The state Department of Housing, Buildings and Construction (HBC) reviews and inspects the larger and higher-risk buildings its code reserves to it, and it runs plumbing and HVAC permitting statewide. HBC’s Grant County contact sheet, updated October 20, 2026, lists the county’s local building inspector with the state building, manufactured housing, electrical, elevator, HVAC, plumbing and boiler inspectors for the county.

Grant County building department: who handles permitting

The building inspector’s duties, as the county lists them, are to issue all building permits in the county and to carry out three building inspections on each new home. The fiscal court’s offices are in the old courthouse at 101 North Main Street, Williamstown, where the state HVAC inspector also keeps Monday office hours.

Cities in Grant County

Three of the four cities straddle a county line, so check which county a lot is in before applying. Only Williamstown publishes how its zoning and the county’s building department fit together.

Grant County permit types

One form, the Application for Building & Site Permit, covers every project type. It asks for the project address and cost, the applicant, owner and contractor, and the square footage of each floor, basement and garage, then a full building description: foundation, framing, heating and air conditioning, roofing, windows, insulation, plumbing fixtures and basement finish.

Residential permits

For a house or addition the form wants plans in duplicate, drawn to scale, showing the lot’s actual shape and dimensions, the size and location of existing and new buildings, the lines within which the building will sit, each building’s existing and intended use and the number of families it will house. Decks and docks need length, width, height and square footage. Owners agree to get a certificate of occupancy before living in a new dwelling or addition.

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

Commercial permits

Hotels, signs and cell towers are on the same form. Commercial projects that fall under the state’s plan review go to HBC as well, and any business working in the county, including contractors, needs a Grant County business license.

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

What comes before the building permit

• Zoning. The building department enforces the county zoning regulations, and the county has a Board of Adjustments, whose members the fiscal court reappointed on July 21, 2026 for terms to January 31, 2029. In Williamstown the city zoning permit comes first: its form asks for the present zoning, lot dimensions and area, intended use, side, front and rear setbacks, and whether city sewer is available or a private system approved by the health department is needed, with a drawing measuring the building to every property line and the street. The form states that zoning approval must be obtained before the building permit process begins.
• Sewer. The fiscal court appoints the board of the Grant County Sanitary Sewer District (two reappointments on August 11, 2026); ask the district, or the city utility, whether a lot can connect to public sewer before designing a septic system.
• Septic. The Northern Kentucky Health Department inspects septic systems in Grant County. For a new system the owner or an agent applies for a site evaluation and pays its $300 fee with the application; if the site is rated suitable or provisionally suitable, a certified installer applies for the installation permit and pays the permit fee. For an addition or rebuild on an existing system, the department says local building code offices require it to inspect the system before a building or remodeling permit is issued.
• Roads. County roads are maintained by the Road Department; any entrance on a state highway needs a Kentucky Transportation Cabinet permit from District 6.
• Short-term rentals. A rental outside Williamstown, Dry Ridge and Crittenden needs a Grant County Short Term Rental Property Permit as well as a county business license.
• Flood zones. Grant County participates in the National Flood Insurance Program; ask the building department about a lot in a mapped flood zone.

Grant County permit fees

The county does not post a building permit fee schedule, and its 2026 application form prints no fees; ask the building inspector for the fee before applying (859-824-9608). The ordinances page carries only the tax and business license ordinances, and official copies of any other ordinance come from the County Clerk. The fees that are published are these:

Business licenses expire on December 31 and must be renewed by January 31; a license taken out after March 31 with no prior work can be prorated by 25%, and after June 30 by 50%. The county’s short-term rental page prints a lower set of license tiers ($25 to $200) than its occupational requirements page, so confirm the amount with the tax administrator.

Trade permits and who may pull them

• Electrical. HBC’s contact sheet tells applicants to ask the Judge/Executive’s office, or the city office where the work is done, for the local electrical inspector. HBC licenses electrical contractors and electricians, and an owner may wire their own home with a permit.
• Plumbing. HBC’s state plumbing inspector holds office hours on Monday mornings at the health department on Barnes Road. HBC issues plumbing permits to licensed master plumbers, or to homeowners for plumbing in their own personal residence.
• HVAC. Licensed HVAC contractors buy permits from HBC through its SmartGov portal; the state HVAC inspector for the county keeps Monday office hours at the old courthouse.
• Elevators, boilers and manufactured homes. Each has its own state inspector on the contact sheet.

Kentucky does not license general contractors; in Grant County a contractor’s local obligation is the county business license and the quarterly occupational tax.

How to apply for a Grant County building permit

Review, corrections and what causes delay

The building inspector is also the plan reviewer, and the form calls for the lot shape, building lines and every existing structure, so drawings missing those items cannot be checked. Williamstown projects wait for the city’s zoning decision before county review begins, and buildings under state jurisdiction need HBC approval. Every business that provides services for pay must register for a county business license, so line those up before work starts.

Inspections in Grant County

Each new home gets three county building inspections: walls, framing and final. Plumbing rough-in and final inspections are booked with the state plumbing inspector, HVAC with the state HVAC inspector, and electrical with the local electrical inspector. The permit form makes the certificate of occupancy a condition of moving into a new dwelling or addition.

Kentucky building code

The county enforces the 2018 Kentucky Building Code and Kentucky Residential Code, the only building codes a Kentucky county may apply. FEMA’s Community Status Book lists Grant County as participating in the National Flood Insurance Program, with a current flood map dated February 28, 2025.

Kentucky has one mandatory statewide building code that local governments may not add to. Cities and counties enforce it and run zoning. The state reviews plans for larger and higher-risk buildings, and the local program reviews smaller ones. Kentucky rules

Grant County permit search and official resources

Permit and certificate of occupancy records are kept by the building inspector’s office; for a written request, the county site links the Attorney General’s standard open records request form. Fiscal court minutes are posted as scanned documents on the minutes page.

• Grant County Building Inspector
• Northern Kentucky Health Department: septic systems
• Application for Building & Site Permit (rev. April 2, 2026)
• Grant County departments and agencies
• Grant County directory
• Occupational requirements and business license fees
• Short-term rental property permits
• County ordinances
• Fiscal court meeting minutes
• City of Williamstown planning and zoning
• Williamstown zoning permit process
• Williamstown zoning permit application
• HBC Grant County inspector contact sheet
• HBC Building Codes: state and local jurisdiction
• HBC Division of Plumbing: permits and fees
• HBC Division of HVAC
• HBC SmartGov portal
• KYTC district permit contacts
• FEMA Community Status Book, Kentucky

Grant County permit FAQs

Who issues building permits in Grant County?

The Grant County building inspector, who also reviews plans (859-824-9608).

Does a new house need a county permit?

Yes. Residences, modular homes, garages, sheds and pole barns are all on the county permit form, and new homes get three inspections.

I am building in Williamstown. Where do I start?

With the city’s zoning permit; the zoning administrator then sends the approval to the Grant County Building Department for the building permit.

How much is a building permit?

The county does not publish its building permit fees; ask the building inspector before applying.

Where do I get a septic permit?

The Grant County Health Department (Northern Kentucky Health Department), 234 Barnes Road, Williamstown, 859-824-5074; the site evaluation costs $300, and a certified installer then takes out the permit.

Do contractors need a county license?

Every business providing services for pay in the county needs a Grant County business license; state trade licenses still apply.

Simplify Grant County permitting with Alliance Permitting

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