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§ 02
When a permit is required
Permit triggers and exempt work for Union
Union states the department issues permits for all residential and commercial construction and remodeling projects within the city.
Note: No public Union exemption list was located on the reviewed pages.
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.
§ 03
Application process
Application → plan check → issuance → inspection → final
- 01 Download the Building Permit Application from the Union permit page.
- 02 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.
- 03 If the project is commercial, industrial, or institutional, submit sealed drawings from a design professional.
- 04 Respond to plan review comments from the Engineering / Building Department.
- 05 Receive permit issuance and proceed with inspections for code compliance.
§ 04
Required inspections
Scheduling and sequence
How to schedule
- (636) 583-1805 (phone)
- Inspection hours
- Monday through Friday, 8:00 AM to 4:30 PM
Typical sequence: Department conducts inspections to ensure compliance with ICC and local codes; detailed sequence not publicly posted on the reviewed page.
§ 05
Frequently asked
Common questions about Union permits
01 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.
02 How do I apply for a building permit in Union, MO? ▸
To apply for a building permit in Union, MO, follow these steps: 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.
03 How do I schedule a building inspection in Union, MO? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in Union, MO via: (636) 583-1805.
last verified April 2026
source City of Union Engineering / Building Department ↗
entry id permits/missouri/franklin/union
Educational reference. Permit rules and fees change — confirm current requirements directly with City of Union Engineering / Building Department before applying. Jaspector is not legal advice.