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Accessory Dwelling Unit (ADU) Permit — Cheyenne, Wyoming · Requirements sheet
Verified 2026-07-17 · Source: https://www.cheyennecity.org/files/sharedassets/public/v/2/departments/city-treasurer/schedule-of-fees/schedule-of-fees.pdf
PermitBase is an independent reference and is not affiliated with any government agency. Requirements change and vary by project — confirm current details with the building department before you submit.
Accessory Dwelling Unit (ADU) Permit in Cheyenne, Wyoming
Required for construction of a new ADU in Cheyenne. As of a Feb 2026 third-reading ordinance, the City removed its owner-occupancy requirement for ADUs and adjusted parking regulations and ADU/semi-attached-dwelling definitions in the Unified Development Code (UDC), making it easier to build and rent ADUs without the owner living on-site.
Verified 2026-07-17 · Source
When you need this permit
- ADU construction requires a standard valuation-based building permit plus Planning Fees review (Accessory Dwelling Unit planning fee)
- As of the Feb 2026 ordinance, owner-occupancy of the primary residence is NO LONGER required to build or rent out an ADU in Cheyenne
- Parking regulations were adjusted alongside the owner-occupancy repeal — confirm current on-site parking requirement with Planning and Development (307-637-6282)
- ADU and semi-attached dwelling (flat-over-flat duplex) definitions were clarified in the UDC to align zoning code with building department practice
- Governed by the 2024 IRC for construction standards; zoning eligibility governed by the Unified Development Code (UDC)
- Contact Planning and Development (307-637-6282) before applying to confirm zoning eligibility for the specific property
Required documents
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Fee schedule
Planning Fees — Accessory Dwelling UnitCity of Cheyenne Schedule of Fees, Planning Fees section (Resolution 6213)
$600.00
Building and Construction Permit Fee — valuation-basedCity of Cheyenne Schedule of Fees (Ordinance 4254)
Varies by project valuation — see Building and Construction Permit Fee table under residential-building-permit
Plan Review FeeCity of Cheyenne Schedule of Fees (Ordinance 4254)
65% of the Building Permit Fee
Review timeline
Plan reviewTypical estimate — confirm current times with the Cheyenne building department
~10–21 business days
Inspection process
- 1
Foundation
Footings/foundation before concrete pour — 36-inch frost depth minimum
- 2
Framing
Structural framing, egress windows, fire separation (if attached)
- 3
MEP Rough-In
Mechanical, electrical, plumbing rough-ins before walls closed
- 4
Final
All work complete, ready for occupancy
See the full Cheyenne inspection guide — scheduling & re-inspection fees →
Tips
- As of the Feb 2026 ordinance, you no longer need to live in the primary residence to build or rent out an ADU in Cheyenne — this is a significant, recent change from the prior owner-occupancy requirement.
- Councilor opposition at the Feb 2026 vote flagged investor-driven ADU purchases as a possible side effect of the owner-occupancy repeal — a signal the rule could face future revisiting, so confirm current status with Planning and Development before relying on it.
- Confirm the exact current parking requirement with Planning and Development, since parking regulations were adjusted at the same time as the owner-occupancy repeal.
- 2026-07-17 rotation audit: searched for any amendment, reversal, or repeal of the Feb 2026 owner-occupancy repeal and found none as of this date — the ordinance (which passed with two dissenting votes) remains in force. The $600.00 ADU Planning Fee (Resolution 6213) was re-confirmed live against the current Schedule of Fees PDF.
Frequently asked questions
Cheyenne requires an accessory dwelling unit (adu) permit for: ADU construction requires a standard valuation-based building permit plus Planning Fees review (Accessory Dwelling Unit planning fee); As of the Feb 2026 ordinance, owner-occupancy of the primary residence is NO LONGER required to build or rent out an ADU in Cheyenne; Parking regulations were adjusted alongside the owner-occupancy repeal — confirm current on-site parking requirement with Planning and Development (307-637-6282); ADU and semi-attached dwelling (flat-over-flat duplex) definitions were clarified in the UDC to align zoning code with building department practice; Governed by the 2024 IRC for construction standards; zoning eligibility governed by the Unified Development Code (UDC); Contact Planning and Development (307-637-6282) before applying to confirm zoning eligibility for the specific property. If your project isn't listed, confirm with City of Cheyenne Compliance Department — Building Safety Division at (307) 637-6265 before starting work.
In Cheyenne, the published Planning Fees — Accessory Dwelling Unit is: $600.00. Additional published fees: Building and Construction Permit Fee — valuation-based — Varies by project valuation — see Building and Construction Permit Fee table under residential-building-permit; Plan Review Fee — 65% of the Building Permit Fee. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.
Plan review for an accessory dwelling unit (adu) permit in Cheyenne typically runs 10–21 business days. This is an estimate, not a published figure — confirm current review times with City of Cheyenne Compliance Department — Building Safety Division at (307) 637-6265.
You'll need: Building Permit Application (via OpenGov portal); Site Plan. See the required-documents checklist on this page for details on each.
Cheyenne requires 4 inspection(s) for an accessory dwelling unit (adu) permit, in order: Foundation, Framing, MEP Rough-In, Final. Schedule each through City of Cheyenne Compliance Department — Building Safety Division ((307) 637-6265).
Apply through City of Cheyenne Compliance Department — Building Safety Division at 2101 O'Neil Avenue, Room 202, Cheyenne, WY 82001. Phone: (307) 637-6265, email: Not published on city site — use main phone or OpenGov portal messaging. Office hours: Mon–Fri (contact department for current hours); permits/inspections managed via OpenGov portal (cheyennewy.portal.opengov.com). Official information: https://www.cheyennecity.org/Your-Government/Departments/Compliance-Department/Building-Permitting-Licensing.
Cheyenne, Wyoming has adopted: 2024 International Building Code (IBC) — adopted by Cheyenne Ordinance No. 4613 (§1), passed 2nd/3rd reading Feb 24, 2025 [CORRECTED 2026-07-17: Municode Ch. 15.08.010 cites 'Ord. No. 4613, §1, 2-24-25' — the ordinance number is 4613, not '2-24'; '2-24-25' is the adoption date (Feb 24, 2025), previously misread as an ordinance number]; 2024 International Residential Code (IRC) — adopted by Ordinance No. 4613 (§3, Feb 24, 2025) [CORRECTED 2026-07-17, same ordinance-number fix; verified live via Municode Ch. 15.10.010]; 2024 International Existing Building Code (IEBC) — adopted by Ordinance No. 4613 (Feb 24, 2025) [CORRECTED 2026-07-17, same ordinance-number fix; verified live via Municode Ch. 15.09.010 — '2024 Edition' confirmed]; 2024 International Fire Code (IFC) — adopted by Ordinance No. 4613 (Feb 24, 2025); solar system pathway-to-ridge grandfather clause for systems installed/permitted before Mar 1, 2025 [CORRECTED 2026-07-17, same ordinance-number fix; verified live via Municode — IFC is codified at Title 8 Ch. 8.12 (Health and Safety), not Title 15, but '2024 Edition' confirmed]; 2024 International Fuel Gas Code (IFGC) — per City of Cheyenne ICC 2024 Building Codes adoption page; 2024 International Mechanical Code (IMC) — verified live 2026-07-17 via Municode Ch. 15.16.010 ('International Mechanical Code, 2024 Edition... Ord. No. 4613, §5, 2-24-25'); NOTE the city's own ICC-2024-Building-Codes webpage badge grid omits an IMC badge entirely, but the codified ordinance confirms 2024 is in force; 2024 International Plumbing Code (IPC) — verified live 2026-07-17 via Municode Ch. 15.12.010 ('International Plumbing Code, 2024 Edition') (NOTE: Cheyenne uses IPC, not UPC); 2024 International Property Maintenance Code (IPMC) — verified live 2026-07-17 via Municode Ch. 15.24.010 (Ch. 1–2 of the 2024 IPMC, adopted under the 'Dangerous Building Code' chapter heading; §15.24.020 amendments still reference some retained 2018 IPMC chapter numbers for Ch. 3–8); 2018 International Energy Conservation Code (IECC) [CORRECTED 2026-07-17 — DRIFT FOUND: the JSON previously said '2024 IECC per the ICC 2024 Building Codes adoption page,' but that page's own badge grid shows '2018 IECC', and Municode Ch. 15.26.010 confirms 'International Energy Conservation Code, 2018 Edition' is the current in-force text, last amended by Ord. No. 4485 §8 (1-9-23) — the 2024/Ord. No. 4613 code-adoption cycle did NOT touch the IECC chapter]; National Electrical Code — City Municipal Code Chapter 15.20 'National Electrical Code Adopted'; 2023 NEC is the current edition in force. Local amendments apply — see the Cheyenne overview page for the full list.
No — as of a Feb 2026 third-reading ordinance, Cheyenne removed the owner-occupancy requirement for accessory dwelling units. Confirm current status and any parking requirements with Planning and Development at (307) 637-6282, since this is a recent change.
Sources & verification
Verified against official sources. Last reviewed 2026-07-17.
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 Cheyenne building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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