MT Building Standards2026 Residential Code

Montana Building Permit Costs, Exemptions & City Portals

Understand residential construction permit requirements in Montana under Montana State Building Code (ARM 24.301). Calculate permit fee estimates for Billings and surrounding counties, check shed and fence exemptions, and review mandatory inspection procedures.

Montana Statutory Ruling: Residential Permitting Standards & Exemptions

Montana Building Permit Standard: Under Montana State Building Code (ARM 24.301), residential building permits are mandated for High snow-load structural roof framing, Basement finishes and frost footings, Electrical service replacements. Detached accessory storage sheds up to 200 sq ft and fences up to 6 ft are permit-exempt. Base municipal fees start at $75 plus plan check review fees.

Governing Code: Montana State Building Code (ARM 24.301)Metro Jurisdiction: City of Billings Building DivisionLast Verified: October 2026

Building Permit Cost & Requirement Estimator

Estimate municipal building permit fees, plan check review costs, and inspection requirements by project valuation.

Valuation includes labor and materials as required by municipal fee formulas.
Expected Permit Subcodes:
BuildingElectricalPlumbing

Estimated Municipal Permit Fees (Billings, MT)

Building Construction Permit:$348
Plan Check Review Fee (50%):$174
Subtrade Surcharges (Elec/Plumb/Mech):$150
Total Estimated Permit Cost:$571 – $773
⏱ Typical Plan Review Turnaround: 7–12 business days
Local Jurisdiction Department:
City of Billings Building Division
Open Official City Permit Portal →
State Building Standards Code: Montana State Building Code (ARM 24.301). Detached one-story accessory tool sheds are permit-exempt up to 200 sq ft. Fences up to 6 feet tall are exempt from building permits.

Planning Construction Budgets in Billings?

Compare full contractor labor and material cost benchmarks across kitchen, bathroom, ADU, and roof replacements.

Explore Metro Cost Guides →

Montana Building Code Exemption Guidelines

Detached Shed Exemption Cap
Up to 200 sq ft
One-story tool/storage shed without electrical or plumbing
Fence Height Exemption Cap
Up to 6 Feet Tall
Standard residential boundary privacy fences

Projects Strictly Requiring Building Permits in Montana

  • High snow-load structural roof framing
  • Basement finishes and frost footings
  • Electrical service replacements
  • Wood stove venting

Permit-Exempt Cosmetic Improvements in Montana

  • One-story tool sheds under 200 sq ft
  • Fences under 6 feet tall
  • Interior painting and tile work

Penalties for Unpermitted Work in Montana

Double permit fees and potential retroactive engineering certifications.

Major Municipal Building Department (Billings)

For properties located in or around Billings, residential permits are processed through the City of Billings Building Division. Standard residential plan check reviews typically take 7–12 business days.

Access Billings Online Permitting Portal →

Montana Building Permit FAQs

Does Montana have a statewide residential building code?

Montana enforces building codes in certified local government jurisdictions (like Billings, Missoula, Bozeman). Unincorporated rural areas may not enforce residential codes, though electrical and plumbing permits remain state-regulated.

Do I need a permit for a pellet stove in Montana?

Yes, local municipalities require a mechanical/solid fuel permit and fire inspection for wood and pellet stove installations.

Compliance Notice: Building codes are adopted locally and may vary between incorporated cities and unincorporated county districts in Montana. Always verify specific setback and permitting requirements with your local jurisdiction before commencing construction.