Yellowstone County Commercial Mechanical & HVAC Systems Permit Calculator
Official fee schedule logic based on Billings City Code Chapter 6. Includes plan review fees, technology surcharges, and prerequisite contractor bond rules.
- AHJ Authority
- City of Billings Building Division
- Enforced Ordinance
- Billings City Code Chapter 6
- Plan Check SLA
- 8 - 14 Business Days
- Surety Bond Required
- $10,000
Yellowstone County Commercial Permit Fee Estimator
Tier Valuation Formula: $1,665 base fee + $3.80 per $1,000 above $250,000 valuation.
Mandatory Contractor Prerequisites & Submittal Checklist
Yellowstone County AHJ RequirementsContractor Surety License Bond
Yellowstone County requires an active $10,000 Montana Contractor Registration Bond on file prior to plan submittal.
Commercial COI Liability ($1M+)
Minimum $1.0M General Liability COI naming Yellowstone County Building Dept as Certificate Holder.
Commercial Mechanical & HVAC Systems Submittal Rules in Yellowstone County
Specialized trade submittals for Commercial Mechanical & HVAC Systems in Yellowstone County, Montana are administered by City of Billings Building Division. Permits are required prior to installing, extending, replacing, or altering any mechanical, electrical, plumbing, structural, or life-safety infrastructure under Billings City Code Chapter 6.
Intake review for Commercial Mechanical & HVAC Systems requires verified trade licensing, minimum contractor general liability COI filings ($1,000,000+), and compliance with enforced regional code editions (2021 Montana State Building Code.).
Mandatory Submittal Plan Documents & PE Engineering Stamps
Plans submitted to City of Billings Building Division for Commercial Mechanical & HVAC Systems must include scaled engineering drawings and specifications:
- MEP Mechanical Load Calculations
- COMcheck Energy Compliance Form
Inspection Sequence for Commercial Mechanical & HVAC Systems
Work performed under a Commercial Mechanical & HVAC Systems permit in Yellowstone County requires mandatory rough-in and final field inspections. Rough-in inspections must be conducted and signed off by the municipal inspector prior to covering or concealing any piping, ductwork, structural framing, or electrical conductors. Final inspection and system testing are required for building certificate of completion issuance.
City of Billings Building Division Official Building Department
2825 3rd Ave N, Billings, MT 59101 | Phone: (406) 657-8270