Apply For An Idaho Building Permit

How can I find out if I need a building permit for my project in Idaho?

Building permits are issued by the local municipality where the property in Idaho is located. In the case of unincorporated areas where the property does not fall under the jurisdiction of a municipality, it is the county government that issues the permit. Regulations throughout Idaho for building permits, including when one is needed, varies by jurisdiction. Your local city or county government will have additional information on whether you need a building permit for your project based on where you are located.

Generally, what projects require a building permit in Idaho?

In Idaho, you will usually need a permit for any demolishing work, construction of a new structure, and substantial alterations to an existing structure. Alterations that need a building permit can include re-roofing, installation of heating systems, and adding a deck to your home, but this depends on the size of the project and local regulations.

What kind of building permits are there?

In the State of Idaho, large projects will often require multiple building permits to cover different aspects of the construction work. For example, you may need one permit to pour the foundation of a structure and another to actually construct the structure. Electrical, mechanical, and plumbing work also normally requires specialized permits. Some requirements depend on where the property is located and what it will ultimately be used for. In Blaine County for example, an agricultural building will not require a building permit but will require a setback permit, unless it is located in a residential area in which case the owner will need to obtain a building permit before construction can begin. It is important that you pay attention to existing regulations such as zoning and flood zone determination when planning your project as these considerations will impact what permits are required.

How long will it take for my building permit application to be processed?

Processing time depends on the size of the project and where you submit your application. Blain County lists a minimum wait time of at least six weeks from the time you submit your application while the city of Rexburg estimates about four weeks for a determination to be made on your application. You can check with your local city or county government to find out how long the average processing time is and whether there is any significant backlog at the time of your application.  


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This site is for informational purposes only and does not constitute legal, financial or tax advise. The information on this site should not be relied upon as an official source of information and should be independently verified.


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