Can you build your own house in Montana without a contractor’s license?

You can work on property you own in Montana without a construction-contractor license, subject to the prompt-resale restriction¹. Montana’s owner-work exemption applies whether you live on the property or not¹. Occupancy matters if you build with the intention of promptly selling the improved property¹.

Montana also exempts you as an owner hiring a registered construction contractor, with a separate prompt-resale restriction¹. Both routes leave building, electrical, plumbing, mechanical and inspection requirements in place where they apply¹. Ask the Construction Contractor License Program how the exemption fits the work you plan to do yourself and hire out.

You can lose Montana’s licensing exemption if you build with the intention and purpose of promptly selling the improved property¹. For owner work, Montana makes an exception if you have continuously occupied the property as your primary residence for at least the last 12 months¹.

That occupancy condition applies to Montana’s resale exception; you do not have to live on the property before doing any owner work¹. Montana’s separate exemption for owners hiring registered construction contractors also excludes otherwise-covered owners building a residence for prompt resale¹. Describe how you plan to use and sell the property to the Construction Contractor License Program before relying on either exemption.

Call the Montana Construction Contractor License Program at (406) 444-6880 or email dlibsdhelp@mt.gov for licensing help⁵. To ask whether you need a state building permit, call the Building Standards Section at (406) 841-2056 or email buildingcodes@mt.gov⁴.

Montana allows certified city, county and town programs to enforce all or part of the local building codes⁶. Montana’s Building Codes Program covers areas without a local enforcement program⁶. Give the Building Standards Section your site address and planned use. Ask which office handles the building permit and each trade permit for that address. Ask the licensing program separately about your owner-work exemption.

You still need the building and trade permits that apply to your project under Montana’s licensing exemption¹. Under Montana’s state jurisdiction, residential buildings with fewer than five dwelling units need no state building permit unless they serve transient guests⁴. That state exemption does not determine what you need inside a certified local government’s jurisdiction⁴.

You may still need separate electrical, plumbing and mechanical permits in Montana⁴. If your project needs a state building permit, you must get it before trade permits and the work they authorize⁴. Ask the Building Standards Section whether your planned home is exempt from the state building permit. Ask separately about the trade work you plan to do yourself.

Your building-permit requirements vary by Montana county, though the owner-builder licensing exemption applies statewide¹. On unincorporated land in 37 Montana counties, you need no residential building permit². Another 14 require a residential building permit only in some cases³. The remaining 5 require a residential building permit³.

You need no residential building permit in Lewis and Clark County or Broadwater County². You need a residential building permit in Silver Bow County³. These Montana county counts cover unincorporated areas; they do not describe city requirements². Use the Montana county building-permit list to narrow your search. Ask the building office about the exact parcel before you buy.

You need to submit construction plans and a Building Permit/Plan Review Application to the Montana Building Codes Program for covered state projects⁴. Montana issues your building permit after you answer plan-review comments satisfactorily and pay the fees⁴. Ask the Building Standards Section what fees and application materials your planned project needs.

If your Montana project needs state inspections, the permit holder must notify the inspector when work is ready and provide access⁶. For a building constructed under state or local building code, the certificate of occupancy must certify that it meets applicable building regulations⁷. Ask the responsible building office which inspections and completion documents you need before scheduling your work.