ADU builder in American Fork, Utah
Cocoon Homes is a Lehi, Utah ADU builder that designs, permits and builds backyard ADUs in American Fork — typically $85,000–$200,000 all-in.
American Fork's City Council voted 4-0 on September 22, 2026 to allow detached ADUs for the first time, on lots of 11,000 sq ft or more.
Ready to talk? Book a 30-minute call.
American Fork ADU rules at a glance
| Rule | American Fork |
|---|---|
| Detached ADU | Allowed — Council adopted 4-0 on Sept 22, 2026 (first time AF has allowed them) |
| Lot / size | 11,000 sq ft+; footprint up to 1,500 sq ft or the home's footprint, whichever is smaller |
| Height / setbacks | Not taller than the house or 24 ft; 12 ft side & rear (20 ft street side on corners); ≤25% of rear yard |
| Parking | 1 space under 650 sq ft; 2 at 650 sq ft+ |
| Owner-occupancy | Required; one ADU per lot; 90-day minimum rental |
Last reviewed October 6, 2026 · Official source: American Fork City · American Fork on our Utah ADU rules tracker
The rule people miss is the rear-yard one: the ADU can cover no more than 25% of your rear yard. On a shallow backyard that caps the footprint well before the 1,500 sq ft limit does, so we measure the yard before we talk plans.
Which Cocoon floor plans fit American Fork's rules
| Plan | Size | Fits American Fork's size rules? | Added parking |
|---|---|---|---|
| 100 Series studio (home ~$63K) | 170 sq ft | Yes, if your home's footprint is larger than 170 sq ft | 1 added space |
| 200 Series one-bed retreat (home ~$73K) | 240 sq ft | Yes, if your home's footprint is larger than 240 sq ft | 1 added space |
| 300 Series one-bedroom, most popular (home ~$84K) | 300 sq ft | Yes, if your home's footprint is larger than 300 sq ft | 1 added space |
| 400 Series flex (home ~$94K) | 400 sq ft | Yes, if your home's footprint is larger than 400 sq ft | 1 added space |
| 500 Series two-bedroom (home ~$109K) | 500 sq ft | Yes, if your home's footprint is larger than 500 sq ft | 1 added space |
| Each plan also has to fit within 25% of your rear yard and stay no taller than your house or 24 ft; we confirm both for your lot before design. | |||
Most owners go wider or add square footage; custom footprints up to American Fork's cap (1,500 sq ft or your home's footprint, whichever is smaller, and no more than a quarter of the rear yard) are available, and we size them to the rules before design. Crossing 650 sq ft moves the parking requirement from one space to two.
What an ADU costs in American Fork
Budget $85,000–$200,000 all-in for a Cocoon ADU in American Fork. The home price is the base; site work, utilities and city costs add 35–50%, and city fees typically run $3,500–$9,000 of that. Our 300 Series one-bedroom comes in around $113,000–$126,000 all-in. Staying under 650 sq ft keeps American Fork's parking requirement at one added space, which is one less pad to pour. Compare that with $200,000–$400,000+ for a traditional custom-built ADU. Details: what a Utah ADU costs.
What an ADU rents for in American Fork
We don't have an American Fork-specific rent figure yet. The Wasatch Front range is $1,200–$2,500 a month, with a typical one-bedroom renting for $1,200–$1,500; treat that as regional, not local. At $1,300 a month, a $113,000 build pays back in about 7–7.5 years of gross rent. American Fork sets a 90-day minimum on rentals, so this is long-term-tenant math, not nightly rentals. More: ADU rental income in Utah.
How we build your ADU in American Fork
- Lot check. We check your lot against American Fork's new ordinance: the 11,000 sq ft minimum, the 12 ft side and rear setbacks, the 25% rear-yard limit and your home's footprint.
- Plan and finishes. Choose a floor plan or a custom footprint sized under your cap, then finishes.
- Engineer-stamped plans submitted to American Fork. We assemble the permit set and submit it to the city on your behalf.
- On-site build. Our own Utah crew builds the ADU on a permanent foundation behind your house.
- Final inspection, utilities, keys. We get the final inspection passed, utilities hooked up and the keys in your hand.
American Fork ADU questions
Can I build an ADU in American Fork?
Who builds ADUs in American Fork?
Do I have to live on the property?
How much parking does an ADU need in American Fork?
How big can an ADU be in American Fork?
Building in American Fork? We'll check your lot first.
Free, and you'll hear from us the same business day.
Ready to talk? Book a 30-minute call.
Nearby: ADU builder in Utah County · Lehi · Saratoga Springs · Orem
More on Utah ADUs: Utah ADU homes · ADU rules in 34 Utah cities · Floor plans