Room Addition Permit Requirements in Dayton, WY
Dayton, WY (pop 757 per 2020 census) is an incorporated town in Sheridan County. Wyoming has no state building code, so the authority depends on location. Sheridan County Public Works (307-675-2420, publicworks@sheridancountywy.gov) runs a building permit program only in the unincorporated Building Code Enforcement Area; incorporated towns like Dayton, Ranchester, and Sheridan are excluded. Within town limits, the Town of Dayton is the authority and permits are handled through Town Hall (no dedicated building department, online portal, or published fee schedule). Town site verified live 2026-05-15. Mailing address PO Box 100, Dayton, WY 82836; phone (307) 655-2217; email frontdesk@daytonwyoming.org. Call Town Hall to confirm permit requirements and fees before starting work.
By Joey, Founder · Last verified May 15, 2026 · How we research →
When you need a Addition permit in Dayton
Home additions almost always require a building permit because they change the structure, footprint, and often the electrical, plumbing, and mechanical systems. Sealed architectural plans are typically required, and additions over 500 sq ft commonly trigger zoning review for setback and lot-coverage compliance (IRC R105.1). To confirm requirements for your specific project in Dayton, WY, contact Town of Dayton (Town Hall) at (307) 655-2217. Visit: https://www.daytonwyoming.org/.
Room Addition Permit Costs: Dayton vs. Nearby
| City | Estimated Fee |
|---|---|
| Dayton | N/A |
| Cheyenne | $180 – $1,800 |
| Casper | $170 – $1,700 |
| Gillette | $170 – $1,700 |
Fees shown are estimates based on local building code data. Actual fees may vary based on project scope and valuation. See all Dayton permit costs →
Zoning Considerations
Room additions typically require zoning review for setbacks, height limits, and lot coverage. Your addition must comply with your zoning district's building envelope requirements.
Estimated Project Timeline in Dayton
Here's a typical timeline for a room addition project in Dayton, WY:
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Frequently Asked Questions
Contact Dayton's building department for current Room Addition permit fee information. Fees typically vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller Room Addition projects may be exempt from permit requirements, while larger ones typically require a permit. Use our free lookup tool to check your specific situation.
Working without a required permit in Dayton can result in fines, stop-work orders, being required to remove completed work, and complications when selling your home. It's always best to check first.
Contact Dayton's building department for current processing times. Timelines vary based on project complexity and whether plan review is required.
Learn More About Room Addition Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read Room Addition Guide →