Accessory Dwelling Unit (ADU) Permit in Sheridan, Wyoming
VerifiedThe City of Sheridan's zoning code (City Code Appendix A — Zoning) contains no ADU-specific category, standard, or process: its Definitions chapter (Ch. 2) defines only "accessory building" and "accessory use" (general incidental structures/uses, not dwelling units), and each residential district chapter — R-1 (one-family only), R-2 (two-family/multi-family), R-3, and R-4 — permits only "accessory buildings and uses customarily incidental to" the district's principal dwelling use, with no second/independent dwelling unit provision. An ADU is therefore reviewed as a standard Detailed (plan-review) Building Permit under the 2024 IRC/IBC as amended by Ordinance No. 2290, using the general Residential New/Add/Alter valuation-based fee, and must otherwise conform to the underlying district's permitted-use table (e.g., only allowed as a second unit where the district itself permits two-family/multi-family dwellings, such as R-2).
Verified 2026-07-01 · Source
When you need this permit
- Confirmed absence: Sheridan City Code Appendix A (Zoning) Chapter 2 (Definitions) defines only "accessory building" and "accessory use" — general incidental structures, not dwelling units; no "accessory dwelling unit," "ADU," "carriage house," or "secondary dwelling" term is defined anywhere in the zoning code
- R-1 Residence District (Ch. 5) permits only one-family dwellings plus incidental accessory buildings/uses — no second dwelling unit permitted
- R-2, R-3, and R-4 Residence Districts (Ch. 6-8) permit two-family/multi-family dwellings as principal uses (not as an accessory unit to a single-family home) plus incidental accessory buildings/uses — none of the four residential district chapters contain an ADU-specific process
- Absent a dedicated ADU category, a legally accessory second dwelling would need to fit within the applicable district's permitted-use table (e.g., a duplex/two-family use in R-2+) and would be processed as a Detailed Building Permit (plan review) under the City's amended 2024 IRC/IBC
- Contractor must hold a current City of Sheridan contractor license
Required documents
- Req
Building Permit Application (OpenGov Permit & Licensing Portal)
Online application at sheridanwy.portal.opengov.com
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Residential New/Add/Alter — up to $100,000 valuation (general formula, likely applicable) | Valuation x 0.03 x 0.8 | City of Sheridan Master Fee Schedule (Resolution #34-23), p.14 — no ADU-specific fee line exists; this is the general residential construction fee formula that would apply absent a dedicated ADU fee |
Review timeline
~5–20 business days
Typical estimate — confirm current times with the Sheridan building department
Inspection process
- 1
Foundation / Footings
Before concrete pour, below the 42-inch local frost line
- 2
Framing
After framing complete, before insulation or wall cover
- 3
MEP Rough-In
Mechanical, electrical, plumbing rough-in before walls closed
- 4
Final
All work complete, ready for occupancy
Tips
- Sheridan's zoning code has no dedicated ADU ordinance, size cap, owner-occupancy standard, or streamlined process — this is a confirmed absence grounded against City Code Appendix A (Zoning) Ch. 2 (Definitions) and Ch. 5-8 (R-1 through R-4 residential districts), not an unverified gap.
- Because there is no ADU category, a second dwelling unit is legal in Sheridan only where the underlying zoning district's permitted-use table already allows a two-family/multi-family dwelling (R-2, R-3, R-4) — it is not permitted as an accessory unit on an R-1 (one-family-only) lot.
- Confirm the specific parcel's zoning district with the City Planning Office before applying; this entry captures the confirmed zoning gap, not a per-parcel eligibility determination.
Frequently asked questions
- Does Sheridan have ADU-specific zoning rules?
- No. The City of Sheridan's zoning code (City Code Appendix A) has no accessory-dwelling-unit definition or standard in its Definitions chapter or in any of the four residential district chapters (R-1 through R-4) — confirmed by direct review of those chapters. A second dwelling unit is only possible where the lot's zoning district already permits two-family/multi-family use (R-2 and above); it would be processed as a standard Detailed Building Permit under the 2024 IRC/IBC.
Sources & verification
Verified against official sources. Last reviewed 2026-07-01.
- City of Sheridan Building Department — official building department
- City of Sheridan City Code, Appendix A — Zoning, Chapter 2 (Definitions: "accessory building"/"accessory use" only, no ADU term)
- City of Sheridan — Building Department page (general Detailed Building Permit process that would apply)
- City of Sheridan Master Fee Schedule (Resolution #34-23, adopted July 5, 2023)
Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Sheridan building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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