Building Safety in Montana (2026)
9 rules on the books across Montana, 2 cities and counties. Select a rule to read the full details.
Severity: Few Restrictions · Light Restrictions · Some Restrictions · Significant Restrictions · Heavy Restrictions
Fire Sprinkler Requirements
When residential and commercial buildings must install fire sprinkler systems, including new-construction triggers and major-renovation thresholds.
Childcare Center Rules
Building safety standards specific to family childcare homes and centers, including egress, sprinklers, lead and asbestos clearances, and outdoor play standards.
Billings
Some RestrictionsBillings' Fire Prevention Code amendments classify day care facilities serving more than five children as a Group E…
Read full rule →Yellowstone County
Some RestrictionsIn unincorporated Yellowstone County, a day care center, family day care home, or group day care home must comply with…
Read full rule →Green Building Code
CALGreen and equivalent state green building codes, plus reach codes that go further (electric-only new construction, EV-readiness, low-VOC materials).
Carbon Monoxide Detectors
Where CO detectors are required (typically near sleeping areas in homes with fuel-burning appliances or attached garages), and seller/landlord deadlines.
Building Permits
When a building permit is required, new work, renovations, reroofing, decks, the small-project exemptions, and what unpermitted work costs when it surfaces at sale or inspection.
Electrical Permits
Which electrical work (panel upgrades, EV chargers, solar inverters, sub-panels) requires a licensed-electrician permit vs. an owner-builder permit.
Plumbing Permits
Which plumbing work (water heaters, sewer-line replacement, repipe, gas-line) requires a permit, and which minor repairs are typically exempt.
Building Inspections
Required inspection types (rough framing, electrical, plumbing, final), how to schedule, what inspectors look for, and how to handle a failed inspection.