ADU builder in Davis County, Utah
Cocoon Homes, headquartered in Lehi, designs, permits and builds backyard ADUs in every Davis County city on our tracker — Bountiful, Farmington, Kaysville, Layton and Syracuse — typically $85,000–$200,000 all-in.
Four of the five allow detached ADUs under their own rules. In Bountiful the state rule applies until its pending ordinance is adopted, so any single-family lot of 11,000 sq ft or more qualifies there today.
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ADU rules by city in Davis County
| City | Status | Lot minimum | Owner-occupancy | Details |
|---|---|---|---|---|
| Bountiful | State rule applies (ordinance pending) | 8,000 sq ft (draft) | Owner in either unit (draft) | Tracker |
| Farmington | Allowed | Not specified | Confirm with city | Tracker |
| Kaysville | Allowed (Sept 17, 2026) | 11,000 sq ft | Owner in either unit | Tracker |
| Layton | Allowed (Ord. 26-27) | 6,000 sq ft | Required | Tracker |
| Syracuse | Allowed in every residential zone | Varies by zone (~5,600–6,000 in RPC) | Owner-occupied | Tracker |
Last reviewed October 6, 2026 · Every city's full rules on our Utah ADU tracker
Where ADU rules are most flexible in Davis County
- Smallest lots: Syracuse allows detached ADUs in every residential zone, with lot minimums around 5,600–6,000 sq ft in its RPC zone, and Layton's minimum is 6,000 sq ft.
- Below the state's 11,000 sq ft even in draft: Bountiful's pending ordinance proposes 8,000 sq ft.
- Owner may live in either unit: Kaysville, and Bountiful's draft.
- At the state line of 11,000 sq ft: Kaysville, adopted September 17, 2026.
- State rule, ordinance still pending: Bountiful.
Davis County ADU costs
The all-in range for a Cocoon ADU in Davis County is $85,000–$200,000. That's the home plus the 35–50% that site work, utilities and city costs add on top, with city fees typically $3,500–$9,000. For a sense of scale: the 300 Series one-bedroom runs about $113,000–$126,000 all-in, while a traditional custom-built ADU costs $200,000–$400,000 or more. In Layton and Syracuse, where lots can be as small as about 6,000 sq ft, we check yard space and setbacks first, before any of that is priced. Full breakdown: Utah ADU costs.
Davis County ADU rents
We don't publish city-level rent figures for Davis County yet. The Wasatch Front regional range is $1,200–$2,500 a month, with a typical one-bedroom at $1,200–$1,500; that's regional, not a Davis County number. At $1,300 a month, a $113,000 build pays back in about 7–7.5 years of gross rent. Layton, Syracuse and Kaysville require the owner to live on the property, Bountiful's draft does too, and Farmington's rule is still to confirm, so plan on renting one unit. More: ADU rental income in Utah.
How a Davis County ADU gets built
- Check the lot against the right city. Five cities, five sets of rules (one still pending), so we start with your address and your city's lot minimum.
- Pick the plan. One of our five floor plans or a custom footprint, then your finishes.
- Permit it. We prepare engineer-stamped plans and submit them to your city.
- Build it. Our own Utah crew builds on a permanent foundation on your lot.
- Hand it over. Final inspection, utilities connected, keys to you.
Davis County ADU questions
Who builds ADUs in Davis County?
Which Davis County cities allow detached ADUs?
What's the minimum lot size for an ADU in Davis County?
How much does an ADU cost in Davis County?
Building in Davis County? We'll check your lot first.
Free, and you'll hear from us the same business day.
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Other counties: Utah County · Salt Lake County
More on Utah ADUs: Utah ADU homes · ADU rules in 34 Utah cities · Floor plans · Our home base: Lehi