Accessory Residential Unit (ARU) Permit in Jackson, Wyoming

Jackson requires an accessory residential unit (aru) permit for: ARUs are permitted in the NC-ToJ, NC-2, S-ToJ, and R-ToJ zones per Ordinance 1139 (adopted Nov. 21, 2016, effective Nov. 23, 2016) — confirm current zone eligibility with the Planning Department before applying, as LDR zone names/boundaries may have been updated since 2016; Maximum of 1 ARU permitted accessory to a detached single-family unit; Built under the standard One and Two Family Building Permit Application (has a dedicated 'Attached ARU' line in the gross square footage tabulation table) — not a separate permit type; The Town's homeowner self-build exemption ('Proprietary Homeowner Contractor') explicitly EXCLUDES accessory residential units — ARU construction always requires a licensed Town of Jackson contractor, even if the owner could otherwise self-build their principal residence; Historically, ARU rental has been restricted to persons employed within Teton County or family/guests of the primary occupant, with minimum rental periods and no compensation for guest use (per 2016 amendment materials); confirm current rental-restriction language with Teton County/Town of Jackson Planning before relying on it, as this may have been superseded by subsequent housing ordinances (e.g., Title 16 Housing). If your project isn't listed, confirm with Town of Jackson Planning & Building Department — Building Division at 307-733-0440, ext. 1352 (Building Inspection Hotline: 307-733-0520, ext. 1351) before starting work.

In Jackson, the published Building Permit — charged under the same per-square-foot / valuation schedule as the primary residence is: $1.70/sq ft (new construction) or valuation-based (addition to existing home). Additional published fees: WUI Permit Review Fee (prerequisite) — $150.00. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Plan review for an accessory residential unit (aru) permit in Jackson typically runs 45–45 business days. This is an estimate, not a published figure — confirm current review times with Town of Jackson Planning & Building Department — Building Division at 307-733-0440, ext. 1352 (Building Inspection Hotline: 307-733-0520, ext. 1351).

You'll need: One and Two Family Building Permit Application (with Attached ARU square footage tabulated); Site Plan showing ARU location, setbacks, and parking; Zoning verification of ARU eligibility (contact Planning Department). See the required-documents checklist on this page for details on each.

Jackson requires 3 inspection(s) for an accessory residential unit (aru) permit, in order: Foundation, Rough Electrical, then Combination Rough (Gas/Plumbing/Mechanical/Framing), Final. Schedule each through Town of Jackson Planning & Building Department — Building Division (307-733-0440, ext. 1352 (Building Inspection Hotline: 307-733-0520, ext. 1351)).

Apply through Town of Jackson Planning & Building Department — Building Division at 150 E Pearl Avenue, Jackson, WY 83001 (P.O. Box 1687, Jackson, WY 83001). Phone: 307-733-0440, ext. 1352 (Building Inspection Hotline: 307-733-0520, ext. 1351), email: townbuilding@jacksonwy.gov. Office hours: The Town does not do over-the-counter permitting; all submittals are electronic. Inspections conducted virtually Tuesdays/Thursdays and in-person Mondays/Wednesdays/Fridays.. Official information: https://www.jacksonwy.gov/181/Building.

Jackson calls it an Accessory Residential Unit (ARU). It is built under the standard One and Two Family Building Permit — there is no separate ADU/ARU permit type or fee.

No. The Town's Proprietary Homeowner Contractor exemption, which otherwise lets a homeowner build their own principal residence, explicitly excludes accessory residential units. ARU construction always requires a licensed Town of Jackson contractor.