Connecticut

Connecticut Permit Guide for Metal Carports, Garages and Barns

In Connecticut, your carport permit comes from your town's building official, because the state has had no working county government since 1960. The U.S. Census Bureau now treats the state's nine planning regions as county-equivalents, but those regions do not issue building permits. Your town's building official does. Every one of Connecticut's towns works from the same statewide building code, so the rules for a carport, garage or barn are mostly the same from town to town, while zoning rules can vary a lot.

Building code in effect

Connecticut builds to the 2022 Connecticut State Building Code, which is based on the 2021 International Codes from the International Code Council. It applies to projects with permit applications filed on or after October 1, 2022. Homes and their accessory buildings fall under the 2021 International Residential Code portion of the state code, and other buildings fall under the 2021 International Building Code portion. A 2026 Connecticut State Building Code based mostly on the 2024 International Codes is in the works. It was expected to start July 1, 2026, but the state Department of Administrative Services says that date has been delayed while the code waits for approval from the Legislative Regulation Review Committee. Ask your building official which edition your permit will be reviewed under.

Who issues permits

In Connecticut the town (or city) building official issues building permits. There is no county building department to call. The state code is the same everywhere, but each town has its own building department, fee schedule and application process. Zoning is a separate approval handled by the town's planning and zoning office, and some towns require a zoning permit for small sheds and accessory buildings that do not need a building permit. Call both offices before you order.

County permit guides

When you need a permit

Small sheds: The 2022 state code exempts one-story detached accessory structures used as tool and storage sheds, playhouses and similar uses from a building permit when the floor area is not greater than 200 square feet.
Carports and garages: A carport or garage over 200 square feet needs a building permit from your town building official. Most metal carports and garages are well over that size.
Zoning still applies: Even a small shed can need a zoning permit. Greenwich, for example, requires a zoning permit for any accessory building over 6 feet tall no matter the floor area.
Farm buildings: The state code does not give barns a general permit exemption. Only shade cloth structures built for nursery or agricultural purposes (with no service systems) are listed as exempt.
Commercial buildings: Buildings for a business fall under the International Building Code portion of the state code and many towns ask for sealed drawings, so plan for more paperwork than a home garage.

Farm buildings

Connecticut does not have a statewide exemption that lets farm buildings skip the building code. The 2022 Connecticut State Building Code incorporates Appendix C (Group U agricultural buildings), so barns and equipment sheds are built and permitted under the code like other structures. The only farm-related item on the state's list of work exempt from a permit is shade cloth structures built for nursery or agricultural purposes that have no service systems. Separately, Conn. Gen. Stat. 12-91 lets a town adopt a property tax exemption for farm buildings used only for farming, but that is a tax break filed with the town assessor, not a building permit exemption. Ask your building official before you assume a barn is exempt.

Wind and snow

Connecticut gets both coastal storms and real winter snow. Towns along Long Island Sound and the shoreline see higher design wind speeds from hurricanes and nor'easters. Inland and hilltop towns, especially in the northwest hills and northeast corner, usually design for heavier snow loads. Ask your town building official what wind speed and ground snow load your building must be engineered for before you order. Our partnered manufacturers offer certified buildings rated for 140 MPH wind and 35 PSF snow load, and higher ratings can be quoted where required.

Before you order

Call your town building department, not the county. Connecticut has no county permit office.
Stop by planning and zoning too. Setbacks, height limits and accessory building rules are set by each town.
Ask for the design wind speed and snow load in writing so the engineered drawings match what the town expects.
If the building is going on a farm, ask the building official how Appendix C applies before assuming it is exempt.

Common questions

Do I need a permit for a carport in Connecticut?
Almost always. The state code only exempts one-story detached accessory structures up to 200 square feet used as sheds, playhouses and similar uses. A typical metal carport is bigger than that, so you will need a building permit from your town building official, and possibly a zoning permit too.

Do I need a permit for a metal garage in Connecticut?
Yes. A metal garage needs a building permit from your town building department under the 2022 Connecticut State Building Code. Your town's zoning office will also check setbacks and size limits, so contact them before you order.

Are farm buildings exempt?
Not from the building code in general. Connecticut's code incorporates Appendix C for agricultural buildings, and only shade cloth structures for nursery or agricultural use are on the exempt list. Some towns offer a property tax exemption for farm buildings under Conn. Gen. Stat. 12-91, but that does not replace a building permit.

Sources

Permit rules change. Always confirm with your local permit office before you build.

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