City or County: Who Issues Your Building Permit?

Before you can apply for a building permit, you need to know which government office actually has authority over your property. In most of the country the rule is simple: if the property is inside the limits of an incorporated city, town, village or borough, that municipality issues the permit; if it is in an unincorporated area, the county does. The trouble is that many people don’t know which side of the line they are on, and the address on their mail can point them to the wrong office.

Applying to the wrong department wastes time, and work permitted by an agency without jurisdiction may not count as permitted at all. This guide explains how permit authority is divided in the US, the common exceptions, and how to confirm your jurisdiction in a few minutes.

Your mailing address is not your jurisdiction

The city name on your mail is a postal designation, not a legal boundary. ZIP codes and the city names attached to them are set for mail delivery, and they regularly cross city limits. A home with a “Springfield” address may sit in unincorporated county land, in a neighboring village, or in a township that has never been part of Springfield.

The same goes for subdivision names, school assignments and the “city” listed on real estate websites. None of these define who regulates construction. What matters is the legal boundary of the incorporated municipality, which is recorded by the county and the state.

Incorporated vs unincorporated areas

An incorporated place is a municipality with its own charter and government: a city, town, village or borough, depending on the state. Incorporated municipalities typically adopt and enforce a building code within their limits, usually based on the International Residential Code and International Building Code with state or local amendments.

Unincorporated land is not part of any municipality. There, the county is usually the general-purpose local government, and in most states the county building or development services department issues permits. Rural areas, but also many dense suburbs, are unincorporated.

Permit authority and zoning authority can sit with the same office or with different ones. Even when you have the right building department, setbacks, land use and floodplain rules may be handled by a separate planning or zoning office.

How the pattern changes by state

Townships, boroughs and villages

The Census Bureau counts 12 states where townships or towns (which it calls minor civil divisions) are general-purpose local governments that can do everything a city can: Connecticut, Maine, Massachusetts, Michigan, Minnesota, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont and Wisconsin. In these states, a property outside any city may still be inside a town or township with its own building department.

• New Jersey: Every incorporated place is independent of the surrounding township, and the whole state is divided among municipalities. Applicants file the state’s construction permit application (UCC Form F100) with the local construction code enforcement office. Where a municipality’s construction officials don’t hold licenses of the right class for a project, the state Department of Community Affairs does the plan review, and the municipality then issues the permit and inspects.
• Pennsylvania: Each of the state’s 2,562 municipalities chooses whether to enforce the Uniform Construction Code. In a municipality that has opted out, the Department of Labor and Industry handles non-residential buildings, and for homes the property owner hires a state-certified third-party agency. Ask the township or borough office which applies before you start.
• New York: The state Uniform Code applies everywhere except New York City, which keeps its own code. Enforcement belongs to each city, village, and town outside any village. A property inside a village is permitted by the village; the same town’s land outside the village goes to the town. If a local government opts out, enforcement passes to the county, and if the county also opts out, to the Department of State.

Consolidated city-counties

Some cities have merged with their counties into one government, so the city and county building departments are the same office. Examples include the City and County of Denver, Nashville-Davidson County, and Jacksonville-Duval County.

Consolidation is rarely total. The Census Bureau notes that in many consolidated governments, other incorporated places inside the county keep functioning as separate governments. Jacksonville Beach, for example, is in Duval County but has its own building division and collects its own building permit fees. In Davidson County, Belle Meade, Forest Hills and Goodlettsville still hold their own municipal elections. Check whether your address falls in one of these places before applying to the consolidated government.

Independent cities

According to the Census Bureau, four states (Maryland, Missouri, Nevada and Virginia) have one or more independent cities that are not part of any county. A property in the City of Alexandria is permitted by the city, not by neighboring Fairfax County. Likewise, Baltimore City and Baltimore County are separate governments with separate permit offices, and St. Louis is separate from St. Louis County.

Texas: extraterritorial jurisdiction and county limits

Texas cities have an extraterritorial jurisdiction (ETJ), the unincorporated land next to city limits, generally extending from half a mile to five miles depending on the city’s population (Local Government Code Section 42.021). Since 2023, residents and landowners have been able to petition for release from a city’s ETJ (Section 42.102). A city can extend its subdivision and platting rules into its ETJ, but under Section 212.003, unless state law authorizes it, the city may not regulate building use, bulk, height, size or residential density there.

Texas counties do not run full building departments the way counties in most states do. Under Local Government Code Chapter 233, Subchapter F, a county that adopts an order opting in can require new single-family homes, duplexes and some additions in unincorporated areas to meet the International Residential Code, either the version published as of May 1, 2008 or the version used in the county seat. But the county cannot require approval before construction starts and cannot charge a fee to enforce the standards (Section 233.153). Instead, the builder hires the inspector, such as a licensed engineer, a TREC-licensed inspector or an ICC-certified residential combination inspector, for at least three inspections: foundation, framing and mechanical, and final (Section 233.154). If a city has adopted a building code for its ETJ, the city’s code controls there. Counties can require the builder to notify them before construction and to report the final inspection, so check with the county engineer or development office before you build.

Regional, contracted and state agencies

Not every permit office belongs to a single city or county.

• Regional departments: The Pikes Peak Regional Building Department in Colorado issues building permits for Colorado Springs, El Paso County, Fountain, Woodland Park, Manitou Springs, Monument, Green Mountain Falls, Palmer Lake and Calhan.
• Third-party plan review and inspection: Some states let private parties take over parts of the work. In Florida, Section 553.791 lets a property owner, or the owner’s contractor with written permission, hire a private provider for plan review or inspections, but the local building official still issues the permit and the certificate of occupancy. In Pennsylvania’s opt-out municipalities the property owner hires a certified third-party agency, and in Texas counties under Subchapter F the builder hires the inspector.
• State agencies: Some building types go to a state office instead of the local department. California’s Division of the State Architect oversees design and construction of K-12 schools, community colleges and various state-owned and leased buildings. New Jersey’s Bureau of Construction Project Review handles plan review for state-owned structures, among others. Private homeowners rarely deal with these agencies, but they explain why a nearby public project may not appear in local permit records.

Manufactured and modular homes

Manufactured homes are built in a factory to the federal Manufactured Home Construction and Safety Standards (24 CFR Part 3280), the HUD code, which governs the home’s construction. Installation falls under a separate federal installation program (24 CFR Part 3286), and in states that run their own qualifying program, the home must meet the state’s installation requirements. You will typically still need local permits for the foundation, utility hookups and any decks, porches, garages or additions.

Modular homes are different. Federal rules (24 CFR 3282.12) exclude them from the HUD code when the manufacturer certifies that they are designed for a permanent site-built foundation and built to a recognized building code. That means the state or local building code applies, and the local building department permits the foundation and site work.

How to confirm who issues your permit

You can usually confirm your jurisdiction in a few minutes:

1. Look up your parcel on the county GIS or parcel viewer. Most counties publish a free map that shows city limits, zoning and the parcel number (APN or PIN). Look for a “jurisdiction,” “municipality” or “city limits” layer.
2. Read your property tax bill. The bill lists every taxing entity. If it includes a city, town, village, borough or township levy, you are probably in that municipality. If the only general government listed is the county (plus special districts), you are probably unincorporated.
3. Ignore special districts. School, fire, water, library, park and utility districts appear on tax bills but are not building permit authorities.
4. Check for a state list. Some states publish who enforces the code in each municipality, such as Pennsylvania’s list of opt-in and opt-out municipalities.
5. Call with your parcel number. Call the building department you think is correct and give them the parcel number, not just the address. Ask: “Is this parcel in your permitting jurisdiction? Do you contract out plan review or inspections? Are there other agencies I need approval from, such as planning, health or floodplain?”
6. Use a directory as a starting point. You can find your local building department here, then confirm with the parcel number.

If you are buying a property, checking jurisdiction early also tells you where to search for permit history. Records of past work live with whichever agency had authority at the time, which can change after an annexation. If you discover work that was never permitted, see our guide on unpermitted work.

Once you know the right office, our guides on how to apply for a building permit and building permit costs cover the next steps.