Accessory Dwelling Unit (ADU) Permit in Green River, Wyoming
VerifiedGreen River's zoning ordinance (Code of Ordinances Appendix B, Chapter 9 — Use Regulations) has NO dedicated Accessory Dwelling Unit (ADU) permit type or zoning category. The zoning code's own definition of 'Accessory Buildings, Structures and Uses' (Section 9.6) explicitly excludes residential occupancy: an accessory use 'Does not include residential occupancy.' A second dwelling unit on a lot must instead be built as a recognized 'Multi-Unit Dwelling' use (permitted only in specific multi-family zoning districts, e.g. R-3/R-4), not as an accessory structure to a single-family home.
Verified 2026-07-01 · Source
When you need this permit
- No ADU-specific permit or zoning pathway exists in Green River; do not apply expecting an 'ADU' permit type
- An accessory structure (garage, shed, workshop) may NOT include residential occupancy per Zoning Code Section 9.6.A ('Accessory Buildings, Structures and Uses') and the Shed & Accessory Structure Brochure
- A genuine second dwelling unit on a property requires the lot to be zoned for Multi-Unit Dwelling use (the zoning Table of Uses permits 'Multi-Unit Dwelling' only in specific districts, e.g. R-3/R-4, not R-1/R-2 single-family districts) — this is processed as a standard residential building permit for a duplex/multi-family structure, not an ADU permit
- Confirm zoning district and permitted use eligibility with Development Services/Planning before attempting any second-unit project
Required documents
- Opt
Shed & Accessory Structure Brochure (DocumentCenter Doc #4092)
States the accessory-use condition that residential occupancy is not included in an accessory structure/use
Fee schedule
| Fee type | Amount | Notes |
|---|
Review timeline
~1–14 business days
Typical estimate — confirm current times with the Green River building department
Inspection process
Tips
- If you are exploring a second dwelling unit in Green River, the correct question is whether your lot is zoned R-3 or R-4 (Multi-Unit Dwelling permitted), not whether an 'ADU' pathway exists — it does not.
- The zoning Table of Uses (Section 9.2) lists 'Single Unit Dwelling' and 'Multi-Unit Dwelling' as the only residential use categories; there is no 'Accessory Dwelling Unit' row.
- This is a verified finding (not a partial): the zoning code was read directly and confirmed to define accessory uses as excluding residential occupancy, and to lack any ADU use category in its Table of Uses.
Frequently asked questions
- Can I build an accessory dwelling unit (ADU) in Green River?
- Green River's zoning code has no dedicated ADU permit or use category. Its definition of an accessory structure/use explicitly excludes residential occupancy. A genuine second dwelling unit requires the property to be zoned for Multi-Unit Dwelling use (e.g., R-3 or R-4), processed as a standard residential building permit for that use — not as an accessory structure to an existing single-family home.
Sources & verification
Verified against official sources. Last reviewed 2026-07-01.
- City of Green River Development Services — Building Inspection Division — official building department
- Green River Code of Ordinances, Appendix B, Chapter 9 — Use Regulations, Section 9.6 (Accessory Buildings, Structures and Uses) and Section 9.2 (Table of Uses)
- City of Green River — Shed & Accessory Structure Brochure (PDF)
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 Green River building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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