Fergus County, MT - 2026 Building Permit Guide

Permit Authority

Unincorporated areas of Fergus County; state-level authority for building permits with local zoning coordination through Fergus County Planning Office.

Department

Montana Building Codes Program (State Level) / Fergus County Planning Office (Local)

Address

1625 11th Ave, Helena, MT 59601

Phone

(406) 841-2056

Email

buildingcodes@mt.gov

Website

https://bsd.dli.mt.gov/building-codes-permits/

Online Permit Portal

Application Process

1. Determine if your project requires a permit (contact Building Codes Program if uncertain)
2. Prepare construction plans meeting International Building Code standards adopted by Montana
3. Complete Building Permit/Plan Review Application form
4. Submit application with plans and fees via EBIZ portal, mail, or in person
5. Building Codes Program reviews plans (typically 2-3 weeks if complete)
6. Pay plan review fees upon receipt of plan review letter
7. Address any plan review comments in writing
8. Pay final building permit fees when all comments satisfied
9. Receive and display building permit on-site
10. Notify state inspector 24 hours before work is ready for inspection
11. Inspector will inspect within 72 hours of notification

Typical processing time: 2-3 weeks for plan review (if plans complete)

Source: Montana Building Codes Program (State Level) / Fergus County Planning Office (Local)

General Requirements

Any construction work except specific exemptions listed below. State law requires permits for all structures except: farm/ranch buildings, mining buildings on mining property, petroleum refineries and pulp/paper mills (excluding office/shop buildings), residential buildings with less than 5 dwelling units (except transient guest structures), and private garages/storage buildings for owner's own use (non-commercial).

Required Documents

• Complete Building Permit/Plan Review Application
• Construction plans showing: site plan, architectural/structural details, mechanical/electrical/plumbing systems, foundation design
• Project cost estimate

Permit validity

Building permits remain valid for 180 days from date of issuance, unless work is substantially started and diligently prosecuted. Extensions may be granted.

Building code

2021 International Building Codes (IBC 2021, IEC 2021, IMC 2021, IPC 2021, IRC 2021) as of June 9, 2022

Owner-builder

The property owner is responsible for applying for the permit. The owner may rely on contractor/designer expertise to complete application.

Contractor requirements

All contractors working in Montana must either: (1) Register as a Construction Contractor with the Montana Department of Labor & Industry ($70 fee) if they have employees, or (2) Obtain an Independent Contractor Exemption Certificate (ICEC) if they have no employees ($125 fee). Specialty trades (electrical, plumbing, mechanical) may have additional licensing requirements.

Fees

Minimum permit fee

$0

Plan check fee

35% of building permit fee

Permit fee formula

1-2% of total building valuation; building valuation is rounded to nearest $1,000; calculated fees are rounded to nearest $1

Fees change. Verify current amounts at the official fee schedule.

Work That Does NOT Require a Permit

• Farm and ranch buildings
• Mining buildings on mining property
• Petroleum refineries and pulp/paper mills (excluding office and shop buildings)
• Residential buildings containing less than 5 dwelling units (except when serving transient guests)
• Private garages and private storage buildings used for owner's own use (not part of commercial enterprise)
• Certain mechanical work covered under separate mechanical permits
• State-owned facilities not subject to local code

Important: Even if exempt from state permits, owner must verify compliance with Fergus County Planning Office requirements for land use/zoning.

Inspections

How to Schedule

• (406) 841-2056 (phone)

Scheduling deadline

Call state building inspector at least 24 hours before work is ready for inspection

Time windows

Inspector has 72 hours from notification to perform inspection

Typical inspection sequence: Multiple inspections required depending on project type (foundation, framing, mechanical, plumbing, electrical, final). Inspector provides written approval/correction notice after each inspection. All inspections must pass before Certificate of Occupancy issued.

Additional Resources

• Building code: 2021 International Building Codes (IBC 2021, IEC 2021, IMC 2021, IPC 2021, IRC 2021) as of June 9, 2022
• Zoning information: View zoning info
• Montana Department of Labor & Industry
• Building Codes Program FAQ
• Montana Contractor Registration
• Montana Administrative Rules (Building Codes)
• Fergus County Contact
• License lookup guide: Montana Contractor License Requirements
• Contract template: Montana Homeowner-Contractor Agreement
• Montana hub: Montana Contractor License & Permit Hub

Frequently Asked Questions

Fergus County Building Permit FAQ

Do I need a building permit in unincorporated Fergus County, MT?

Any construction work except specific exemptions listed below. State law requires permits for all structures except: farm/ranch buildings, mining buildings on mining property, petroleum refineries and pulp/paper mills (excluding office/shop buildings), residential buildings with less than 5 dwelling units (except transient guest structures), and private garages/storage buildings for owner's own use (non-commercial).

How much does a building permit cost in unincorporated Fergus County, MT?

The minimum permit fee is $0. Fees are calculated as: 1-2% of total building valuation; building valuation is rounded to nearest $1,000; calculated fees are rounded to nearest $1. Plan check fee: 35% of building permit fee.

How do I apply for a building permit in unincorporated Fergus County, MT?

1. Determine if your project requires a permit (contact Building Codes Program if uncertain) 2. Prepare construction plans meeting International Building Code standards adopted by Montana 3. Complete Building Permit/Plan Review Application form 4. Submit application with plans and fees via EBIZ portal, mail, or in person 5. Building Codes Program reviews plans (typically 2-3 weeks if complete) 6. Pay plan review fees upon receipt of plan review letter 7. Address any plan review comments in writing 8. Pay final building permit fees when all comments satisfied 9. Receive and display building permit on-site 10. Notify state inspector 24 hours before work is ready for inspection 11. Inspector will inspect within 72 hours of notification

How long does it take to get a building permit in unincorporated Fergus County, MT?

Typical processing time is 2-3 weeks for plan review (if plans complete).

What work is exempt from building permits in unincorporated Fergus County, MT?

The following work is generally exempt: Farm and ranch buildings; Mining buildings on mining property; Petroleum refineries and pulp/paper mills (excluding office and shop buildings); Residential buildings containing less than 5 dwelling units (except when serving transient guests); Private garages and private storage buildings used for owner's own use (not part of commercial enterprise); Certain mechanical work covered under separate mechanical permits; State-owned facilities not subject to local code. Note: Even if exempt from state permits, owner must verify compliance with Fergus County Planning Office requirements for land use/zoning.

How do I schedule a building inspection in unincorporated Fergus County, MT?

Inspections can be scheduled via: (406) 841-2056. Call state building inspector at least 24 hours before work is ready for inspection.