How do I apply for a building permit in Union, MO?

1. Download the Building Permit Application from the Union permit page. 2. Prepare and submit the application with two sets of plans showing the work, a site plan showing setbacks to lot lines, and truss plans where roofing is involved. 3. If the project is commercial, industrial, or institutional, submit sealed drawings from a design professional. 4. Respond to plan review comments from the Engineering / Building Department. 5. Receive permit issuance and proceed with inspections for code compliance.

How do I schedule a building inspection in Union, MO?

Inspections can be scheduled via: (636) 583-1805.

City Building Permits

Union, MO - 2026 Building Permit Guide

How to apply for a building permit in Union, Missouri. Permit authority, application steps, fees, and inspection requirements.

Missouri Franklin County Updated March 2026

Permit Authority

Applies within the City of Union. The department reviews plans and issues permits for residential and commercial construction and remodeling projects within the city.

Department: City of Union Engineering / Building Department
Address: 10 E Locust Street, Union, MO 63084
Phone: (636) 583-1805
Website: https://www.unionmissouri.gov/government/departments/engineering_building/index.php

Online Permit Portal

Open Building Permits

Platform: Revize website forms page • Account required: No • Submission: In-person only

Additional resources:

Application Process

Download the Building Permit Application from the Union permit page.
Prepare and submit the application with two sets of plans showing the work, a site plan showing setbacks to lot lines, and truss plans where roofing is involved.
If the project is commercial, industrial, or institutional, submit sealed drawings from a design professional.
Respond to plan review comments from the Engineering / Building Department.
Receive permit issuance and proceed with inspections for code compliance.

Source: City of Union Engineering / Building Department

General Requirements

Union states the department issues permits for all residential and commercial construction and remodeling projects within the city.

Required Documents

Building Permit Application
Two sets of plans
Site plan with lot-line dimensions
Truss plans if roofing is involved
Sealed drawings for commercial, industrial, or institutional projects

Building code: Union adopted 2021 IBC, 2021 IRC, 2021 IEBC, 2021 IPC, 2021 IMC, 2021 IFGC, 2021 IPMC, 2021 IECC, and NEC 2020 as amended.

Fees

Payment note: Confirm current fees with Engineering / Building.

Work That Does NOT Require a Permit

Contact the City of Union Engineering / Building Department to confirm whether your project requires a permit before starting work.

Inspections

How to Schedule

(636) 583-1805 (phone)

Inspection hours: Monday through Friday, 8:00 AM to 4:30 PM

Typical inspection sequence: Department conducts inspections to ensure compliance with ICC and local codes; detailed sequence not publicly posted on the reviewed page.

Additional Resources

Building code: Union adopted 2021 IBC, 2021 IRC, 2021 IEBC, 2021 IPC, 2021 IMC, 2021 IFGC, 2021 IPMC, 2021 IECC, and NEC 2020 as amended.
Verify contractor license: Missouri Contractor License Lookup
Zoning information: View zoning info
Building Permits
Building Codes
City Code of Ordinances
License lookup guide: Missouri Contractor License Requirements
Contract template: Missouri Homeowner-Contractor Agreement
Missouri hub: Missouri Contractor License & Permit Hub

Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the City of Union Engineering / Building Department before applying.

Frequently Asked Questions

Union Building Permit FAQ

Do I need a building permit in Union, MO?: Union states the department issues permits for all residential and commercial construction and remodeling projects within the city.
How do I apply for a building permit in Union, MO?: 1. Download the Building Permit Application from the Union permit page. 2. Prepare and submit the application with two sets of plans showing the work, a site plan showing setbacks to lot lines, and truss plans where roofing is involved. 3. If the project is commercial, industrial, or institutional, submit sealed drawings from a design professional. 4. Respond to plan review comments from the Engineering / Building Department. 5. Receive permit issuance and proceed with inspections for code compliance.
How do I schedule a building inspection in Union, MO?: Inspections can be scheduled via: (636) 583-1805.

Need help with your project?

Navigating permits in Union can be complicated.

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Important: This page is an educational resource provided by jaspector.com. It is not legal advice, and it does not substitute for official guidance from the permit authority listed above. Permit requirements, fees, and processes change frequently. Always verify current requirements directly with the issuing department before beginning any construction project. Use of this page does not create an attorney-client relationship. Jaspector assumes no liability for any outcomes arising from reliance on this information.

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