ADU & Garage Conversion Costs in Sandy and Draper (2026)
Sandy and Draper allow ADUs — here's what they cost in 2026, the difference between converting a garage and building detached, and the permit notes you'll run into.
Garage conversion vs detached ADU
A garage conversion uses existing footprint and walls — cheaper, faster, but you give up the garage. Expect $85k–$150k for a 400–500 sq ft conditioned ADU with a full bath, kitchenette, and separate entrance. Add $10k–$20k if utilities (sewer, water) need to be extended.
A detached ADU is a new structure — slab, framing, roof, full mechanicals. Pricier ($140k–$310k for 600–900 sq ft) but doesn't take the garage and typically appraises higher.
Sandy and Draper permit notes
Sandy's updated ADU ordinance allows internal (basement) and detached ADUs subject to owner-occupancy and one off-street parking space per ADU. Draper allows ADUs similarly, with additional setback requirements on smaller lots. Both cities issue ADU permits in 4–6 weeks once drawings are submitted.
SunCrest, Hidden Valley, and other HOA-governed neighborhoods may have additional restrictions on ADUs — verify with the ARC before drawings are finalized.
Frequently Asked Questions
- Can I rent out my ADU in Sandy?
- Yes, subject to the owner-occupancy requirement (you must live in the primary residence or the ADU) and local short-term rental rules.
- Does a garage conversion need a permit?
- Yes — conditioning previously-unconditioned space requires building, electrical, plumbing, and mechanical permits.