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County building permits in Montana

Select a county to see exactly who issues building permits and open the official permit portal.

Yellowstone County

City of Billings Building Division (Yellowstone County does not issue building permits)

Missoula County

Missoula County Public Works Building Division (unincorporated areas); City of Missoula issues within city limits

Lewis and Clark County

Lewis and Clark County Community Development & Planning (unincorporated areas); City of Helena issues within city limits

Before you file in Montana

Does your project need a permit?

A go / no-go answer before you contact the county.

Permit rules by project type

What the county will look for, project by project.

Permit fee estimator

Budget the fee before you open the application.

Statewide overview

See how this state compares with the others we cover.

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