Utah ADU Rules - 2026
Can you build a backyard home on your Utah lot?
Utah's detached-ADU law (SB284) is now in effect as of October 1, 2026. Every covered city must allow a backyard home on a qualifying lot, and most Wasatch Front cities have adopted their own rules to match. Tap your city on the map, or scroll the full list below - 34 cities, each reviewed against the ordinance its council actually adopted.
Cocoon Homes, a Utah ADU builder, designs, permits and builds ADUs in all 34 cities on this tracker — from Ogden to Santaquin — typically $85,000–$200,000 all-in.
Tracker last reviewed October 6, 2026 · SB284 in force since Oct 1
Find your city
Hover a dot to see the city; tap or click to pull up its rules.
Allowed under city ordinance
State rule applies (city update not confirmed)
Pick a city to see its rules
Tap any dot on the map and this panel fills in with that city's ADU rules — lot size, height, owner-occupancy, and a link to the official source.
What SB284 actually does
The statewide floor, in force since October 1, 2026 - your city fills in the details
Utah passed SB284 in the 2026 session, and it took effect on October 1, 2026 as Utah Code 10-21-304. It extends the state's ADU rules to detached units - backyard cottages, garage apartments, standalone guest houses. Before it, many cities prohibited them outright or made them a conditional use. That's over. Here's the shape of it:
Cities must allow them
Covered cities of 5,000+ residents must now permit a detached ADU as a permitted use - no conditional-use permit - on qualifying lots. A city that hasn't finished updating its code is still bound by the state rule today.
The 11,000 sq ft line
Any lot of 11,000 sq ft or larger (about a quarter acre) with a single-family home, in a zone where single-family homes are permitted, qualifies. Many cities allow detached ADUs on smaller lots too - that stays their call.
No size cap below the house
A city can't cap a qualifying detached ADU's size, other than saying it can't be larger than the primary home. It can require a second off-street parking space only when the unit is over 650 sq ft.
Your city sets the specifics
Setbacks, height, lot coverage, design, utilities, owner-occupancy, front-yard placement and short-term-rental rules are still your city's call. One ADU per lot is the norm, and the law also requires a path to convert an existing, legally built accessory structure.
That last point is the whole game. The right to build is now statewide, but the details still vary city by city - two homeowners a mile apart can get different setbacks, heights and size limits. 29 of the 34 cities below have adopted their own detached-ADU rules; for the rest, the state rule fills the gaps until they do. Always confirm with your city before you design or budget.
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34 cities shown
Salt Lake City ADU rules (Salt Lake County)
AllowedDetached ADUAllowed citywide, by right (conditional use dropped 2023)
Max height17 ft (up to 24 ft pitched w/ added setback)
SetbacksSide & rear min 3 ft (detached)
Owner-occupancyRequired — live in either unit
SB284Already more permissive than the state floor; no change needed
BuilderCocoon Homes builds detached ADUs in Salt Lake City — design, permits and on-site construction. See our Salt Lake City ADU builder page →
Check my lot in Salt Lake City →Last reviewed October 6, 2026Official source ↗
Salt Lake County (uninc.) ADU rules (Salt Lake County)
AllowedDetached ADUAllowed with standards (2024 ordinance)
Lot minimum7,000 sq ft (detached) — already below the state's 11,000
HeightUp to 20 ft or match main home
Parking1 space for the ADU
Owner-occupancyRequired; affidavit recorded
BuilderCocoon Homes builds detached ADUs in Salt Lake County (uninc.) — design, permits and on-site construction.
Check my lot in Salt Lake County (uninc.) →Last reviewed October 6, 2026Official source ↗
West Valley City ADU rules (Salt Lake County)
AllowedDetached ADUAllowed on 11,000+ sq ft single-family lots — Ord. 26-28 adopted June 23, 2026
PlacementSide or rear yard only; 20 ft from any street-side property line; accessory-building height/area limits
Owner-occupancyOwner lives in the home or the ADU
Parking1 space under 650 sq ft; 2 spaces at 650 sq ft+, outside the front setback
RentalBusiness license required; 90-day minimum
BuilderCocoon Homes builds detached ADUs in West Valley City — design, permits and on-site construction.
Check my lot in West Valley City →Last reviewed October 6, 2026Official source ↗
West Jordan ADU rules (Salt Lake County)
AllowedDetached ADUAllowed (EADU) on single-family lots 10,000 sq ft+ — Ord. 25-34
Lot minimum10,000 sq ft — already below the state's 11,000
FoundationMust be on a permanent foundation
UnitsOne ADU per lot (internal OR external)
2026Further 13-5B-8 tweaks discussed Feb 24 — confirm current text
BuilderCocoon Homes builds detached ADUs in West Jordan — design, permits and on-site construction.
Check my lot in West Jordan →Last reviewed October 6, 2026Official source ↗
Sandy ADU rules (Salt Lake County)
AllowedDetached ADUAllowed — Ord. 26-55 adopted Sept 15, 2026 (4-2); administrative permit; side or rear yard
Lot minimum11,000 sq ft (motion for 10,000 failed 3-3)
Size / heightLesser of 2,000 sq ft, 75% of the home's footprint, or accessory cap; 15 ft at 10 ft setback, or 18 ft / 1.5 stories
Setbacks10 ft side & rear minimum; 6 ft from the house
Parking / occupancyUnder 650 sq ft: 1; 650+: 2; owner-occupancy proven by deed + affidavit; 30-day minimum rental
BuilderCocoon Homes builds detached ADUs in Sandy — design, permits and on-site construction. See our Sandy ADU builder page →
Check my lot in Sandy →Last reviewed October 6, 2026Official source ↗
Draper ADU rules (Salt Lake County)
AllowedDetached ADUAllowed (D-ADU); rules eased Nov 2024
Lot minimum6,000 sq ft — already below the state's 11,000
Owner-occupancyRequired — main home OR the ADU
Basement rentalsPermitted
PermitD-ADU permit required (code current through Ord. 1721, Aug 2026)
BuilderCocoon Homes builds detached ADUs in Draper — design, permits and on-site construction. See our Draper ADU builder page →
Check my lot in Draper →Last reviewed October 6, 2026Official source ↗
Murray ADU rules (Salt Lake County)
AllowedDetached ADUAllowed in any zone that permits single-family homes (Ch. 17.78)
2024 updateOrd. O24-26 eased detached-ADU standards
UnitsOne ADU per lot
Owner-occupancyOwner in primary or the ADU
Short-term rentalProhibited (under 30 days)
BuilderCocoon Homes builds detached ADUs in Murray — design, permits and on-site construction.
Check my lot in Murray →Last reviewed October 6, 2026Official source ↗
Herriman ADU rules (Salt Lake County)
AllowedDetached ADUAllowed — Council adopted 5-0 on May 27, 2026
Lot minimum7,000 sq ft (as recommended by Planning Commission)
Size / height1,000 sq ft max, 25 ft max in the draft — confirm final text
Owner-occupancyRequired on the primary home; no short-term rentals
UtilitiesNo separate meters; no new road cuts
BuilderCocoon Homes builds detached ADUs in Herriman — design, permits and on-site construction.
Check my lot in Herriman →Last reviewed October 6, 2026Official source ↗
Bluffdale ADU rules (Salt Lake County)
AllowedDetached ADUPermitted use in residential zones since May 2023 (administrative approval)
Max size50% of the main home's gross sq ft — on 11,000+ sq ft lots the state allows only “not larger than the home”; confirm
Rental30 days or longer; no short-term rentals
UtilitiesNo separate meters
CodeSection 11.340 + the city's ADU Toolkit
BuilderCocoon Homes builds detached ADUs in Bluffdale — design, permits and on-site construction.
Check my lot in Bluffdale →Last reviewed October 6, 2026Official source ↗
Bountiful ADU rules (Davis County)
State rule appliesDetached ADUOrd. 2026-08 (conditional use → permitted, staff review) was on the Sept 22 agenda — adoption not verified
Draft lot minimum8,000 sq ft buildable land — more generous than the state's 11,000
Draft size / height350–1,250 sq ft; 20 ft with 3 ft side/rear setbacks, or 25 ft with 8 ft
Draft designBehind the front building line; no windows/doors or decks facing a 3–8 ft setback
Draft parking / occupancy1 added space; owner in either unit; deed restriction; no separate meters
BuilderCocoon Homes builds ADUs in Bountiful. On qualifying lots (11,000+ sq ft, single-family home) the state rule allows a detached ADU now, even before the city finishes its ordinance.
Check my lot in Bountiful →Last reviewed October 6, 2026Official source ↗
Farmington ADU rules (Davis County)
AllowedDetached ADUAllowed (Ch. 11-28-200) — one of the state's most permissive ordinances
NotableDetached units may even be sold separately in some cases
Setback10 ft from the primary building (detached)
Owner-occupancyConfirm current rule with city
2025–26Title 11 cleanups in progress — confirm specifics
BuilderCocoon Homes builds detached ADUs in Farmington — design, permits and on-site construction.
Check my lot in Farmington →Last reviewed October 6, 2026Official source ↗
Kaysville ADU rules (Davis County)
AllowedDetached ADUAllowed — Ord. 26-09-04 adopted Sept 17, 2026, in all residential zones; not in front yard or easements
Lot minimum11,000 sq ft with a permitted single-family home
Size / heightSmaller of 50% of the house footprint (incl. garage) or 1,200 sq ft; no taller than the house or 25 ft
SetbacksOne story: house setbacks; two story: side yard grows to the zone's rear setback
Parking / occupancy650 sq ft or less: 1; over: 2; paved, no tandem; owner in either unit; 90-day minimum; rental license
BuilderCocoon Homes builds detached ADUs in Kaysville — design, permits and on-site construction.
Check my lot in Kaysville →Last reviewed October 6, 2026Official source ↗
Layton ADU rules (Davis County)
AllowedDetached ADUAllowed in all single-family zones — Ord. 26-27 aligned code to SB284
Lot minimum6,000 sq ft for detached — already below the state's 11,000
DesignMaterial, window and door-placement rules removed per state law; simplified standards table
ConversionClear path to convert an existing accessory structure
Owner-occupancyRequired; 30-day minimum rental, no STR
BuilderCocoon Homes builds detached ADUs in Layton — design, permits and on-site construction.
Check my lot in Layton →Last reviewed October 6, 2026Official source ↗
Syracuse ADU rules (Davis County)
AllowedDetached ADUAllowed in every residential zone
Lot minimumVaries by zone (RPC zone ~5,600–6,000 sq ft) — confirm for yours
Internal ADUNo size limit for internal
Owner-occupancyOwner-occupied (2 exceptions: leave/medical)
Next stepConfirm setbacks and parking with Syracuse planning
BuilderCocoon Homes builds detached ADUs in Syracuse — design, permits and on-site construction.
Check my lot in Syracuse →Last reviewed October 6, 2026Official source ↗
Ogden ADU rules (Weber County)
AllowedDetached ADUAllowed, owner-occupied model
Detached size300–800 sq ft in current code (15-13-39) — state bars any cap below the home's size on 11,000+ sq ft lots since Oct 1; confirm
OccupancyOwner in one unit; other unit ≤2 adults
AppearanceSingle-family look; side/rear entrance; ≤25% of rear yard
PermitADU/land-use permit, then building permits
BuilderCocoon Homes builds detached ADUs in Ogden — design, permits and on-site construction.
Check my lot in Ogden →Last reviewed October 6, 2026Official source ↗
Lehi ADU rules (Utah County)
AllowedDetached ADUAllowed — Council adopted the SB284 update July 14, 2026
Lot minimum11,000 sq ft (was 14,520)
SizeMust be smaller than the primary home (1,300 sq ft cap dropped)
Setback6 ft from the existing home
Owner-occupancyRequired — primary or the detached unit; 2 parking spaces if over 650 sq ft
BuilderCocoon Homes builds detached ADUs in Lehi — design, permits and on-site construction. See our Lehi ADU builder page →
Check my lot in Lehi →Last reviewed October 6, 2026Official source ↗
Highland ADU rules (Utah County)
AllowedDetached ADUAllowed — Ord. O-2026-28 adopted Sept 1, 2026
Lot minimum11,000 sq ft (state threshold)
SizeCapped by lot size — roughly 1,250–1,500 sq ft on larger lots
SetbacksMain-dwelling setbacks apply, single-story exception
Owner-occupancyRequired and recorded; registration; 1 parking space (+1 if over 650 sq ft)
BuilderCocoon Homes builds detached ADUs in Highland — design, permits and on-site construction.
Check my lot in Highland →Last reviewed October 6, 2026Official source ↗
Alpine ADU rules (Utah County)
AllowedDetached ADUAllowed — Ord. 2026-16 adopted Sept 8, 2026 (3-2) wherever single-family is permitted
Size300 sq ft min; max 800 / 900 / 1,000 / 1,200 sq ft by lot size, plus a 35–22% coverage cap (lesser governs)
Height / setbacks25 ft to ridge; accessory-building setbacks for the zone
Utilities / conversionExisting legal accessory structures may convert; shares the house's meters
Parking / occupancyUp to 650 sq ft: 1 added; over: 2; owner in either unit (3-yr absence exception); 90-day minimum rental
BuilderCocoon Homes builds detached ADUs in Alpine — design, permits and on-site construction.
Check my lot in Alpine →Last reviewed October 6, 2026Official source ↗
Cedar Hills ADU rules (Utah County)
AllowedDetached ADUAllowed — Ord. 07-07-2026C adopted July 7, 2026; no longer a conditional use
UnitsOne ADU per lot; only one may be rented
RegistrationRequired; enforcement via code compliance
Parking1 off-street space (2 if over 650 sq ft)
SetbacksAccessory buildings 12 ft from the main building's rear and side walls
BuilderCocoon Homes builds detached ADUs in Cedar Hills — design, permits and on-site construction.
Check my lot in Cedar Hills →Last reviewed October 6, 2026Official source ↗
American Fork ADU rules (Utah County)
AllowedDetached ADUAllowed — Council adopted 4-0 on Sept 22, 2026 (first time AF has allowed them)
Lot / size11,000 sq ft+; footprint up to 1,500 sq ft or the home's footprint, whichever is smaller
Height / setbacksNot taller than the house or 24 ft; 12 ft side & rear (20 ft street side on corners); ≤25% of rear yard
Parking1 space under 650 sq ft; 2 at 650 sq ft+
Owner-occupancyRequired; one ADU per lot; 90-day minimum rental
BuilderCocoon Homes builds detached ADUs in American Fork — design, permits and on-site construction. See our American Fork ADU builder page →
Check my lot in American Fork →Last reviewed October 6, 2026Official source ↗
Pleasant Grove ADU rules (Utah County)
AllowedDetached ADUAllowed in the rear yard — incl. tiny homes as detached ADU
Owner-occupancyMain dwelling must be owner-occupied
ParkingAmendment to state limits (1 space, or 2 for larger units) went to Council Sept 15 — state limits govern regardless
SaleCannot be subdivided or sold separately
CodeChapter 10-15-47
BuilderCocoon Homes builds detached ADUs in Pleasant Grove — design, permits and on-site construction.
Check my lot in Pleasant Grove →Last reviewed October 6, 2026Official source ↗
Lindon ADU rules (Utah County)
AllowedDetached ADUAllowed — Ord. 2026-16-O adopted Sept 21, 2026
Lot minimum11,000 sq ft (was 12,000) with an owner-occupied home
Parking1 stall at 650 sq ft or less; 2 above (was 2 for every unit)
ConversionLegally built accessory structures can convert if they meet setbacks and codes
DesignCity may regulate height, size, coverage, setbacks — not colors, materials or door placement
BuilderCocoon Homes builds detached ADUs in Lindon — design, permits and on-site construction.
Check my lot in Lindon →Last reviewed October 6, 2026Official source ↗
Orem ADU rules (Utah County)
AllowedDetached ADUAllowed — Art. 22-6-11 adopted Sept 22, 2026 (first time Orem has allowed them)
SizeTiered by lot: about 850 / 1,000 / 1,200 sq ft (15,000 sq ft+ lots); 200 sq ft min
HeightSingle story; 20 ft pitched, 14 ft flat, never taller than the home
Setbacks10 ft from the home and interior lot lines; 20 ft from a neighbor's house; no front yard
Owner-occupancyRequired; no short-term rentals
BuilderCocoon Homes builds detached ADUs in Orem — design, permits and on-site construction. See our Orem ADU builder page →
Check my lot in Orem →Last reviewed October 6, 2026Official source ↗
Vineyard ADU rules (Utah County)
State rule appliesDetached ADUOrd. 2026-11 hearing continued Sept 8, 2026 pending a Planning Commission recommendation
Lot minimum12,000 sq ft today; proposed 11,000 — state rule already covers 11,000+ lots
ScopePhase 1 of a three-phase SB284 update
Size / height / setbacksNot yet set in adopted code
Next stepWatch Vineyard Community Development for adoption
BuilderCocoon Homes builds ADUs in Vineyard. On qualifying lots (11,000+ sq ft, single-family home) the state rule allows a detached ADU now, even before the city finishes its ordinance.
Check my lot in Vineyard →Last reviewed October 6, 2026Official source ↗
Provo ADU rules (Utah County)
State rule appliesDetached ADUNo SB284 ordinance adopted — Title 14 rewrite (PLOTA20260414) continued Sept 8, 2026
What applies nowState rule: any 11,000+ sq ft single-family lot qualifies as a permitted use
Existing codeCh. 14.30 ties ADUs to the ADU overlay (eligibility map published)
Draft standardsSize, height, setbacks and parking still in draft — not adopted
Next stepConfirm current standards with Provo Planning
BuilderCocoon Homes builds ADUs in Provo. On qualifying lots (11,000+ sq ft, single-family home) the state rule allows a detached ADU now, even before the city finishes its ordinance. See our Provo ADU builder page →
Check my lot in Provo →Last reviewed October 6, 2026Official source ↗
Springville ADU rules (Utah County)
AllowedDetached ADUAllowed since 2020 (54 certificates issued)
Size / heightUp to 1,200 sq ft and 16 ft — on 11,000+ sq ft lots the state now allows up to the home's size; confirm
Internal ADUAlso allowed in attached homes (Sept 2025)
Owner-occupancyRequired
ParkingRequired
BuilderCocoon Homes builds detached ADUs in Springville — design, permits and on-site construction.
Check my lot in Springville →Last reviewed October 6, 2026Official source ↗
Mapleton ADU rules (Utah County)
AllowedDetached ADUAllowed on ~11,000 sq ft (quarter-acre) lots — Council amended June 2026 to meet state law
Size40% cap removed; caps by lot size remain (1,000 / 1,200 / 1,400 sq ft)
ExemptionHarvest Park small-lot exemption kept
Owner-occupancyRequired (18.84.410)
AppealsNow heard by a hearing officer, not Council
BuilderCocoon Homes builds detached ADUs in Mapleton — design, permits and on-site construction.
Check my lot in Mapleton →Last reviewed October 6, 2026Official source ↗
Spanish Fork ADU rules (Utah County)
AllowedDetached ADUAllowed — Ord. 14-2026 (Title 15 Detached ADUs) adopted Aug 18, 2026
Lot minimum10,000 sq ft — already below the state's 11,000
Setbacks10 ft from the rear property line; not in front/side yard
Owner-occupancyRequired; one ADU per home; annual registration ($60)
Parking4 off-street spaces (external) — confirm against the new ordinance
BuilderCocoon Homes builds detached ADUs in Spanish Fork — design, permits and on-site construction.
Check my lot in Spanish Fork →Last reviewed October 6, 2026Official source ↗
Salem ADU rules (Utah County)
AllowedDetached ADUAllowed — SB284 compliance ordinance adopted unanimously May 6, 2026
Lot minimumWas 2 acres, cut to 1 acre Feb 18; 11,000+ sq ft lots qualify since Oct 1
Impact feesNone if the ADU ties into existing services; charged if utilities are upsized
Owner-occupancyConfirm current rule with city
Next stepConfirm size / parking specifics with Salem Planning
BuilderCocoon Homes builds detached ADUs in Salem — design, permits and on-site construction.
Check my lot in Salem →Last reviewed October 6, 2026Official source ↗
Payson ADU rules (Utah County)
AllowedDetached ADUAllowed in residential and agricultural zones since Nov 2024 (Code 13.20.220–221)
PermitAccessory-apartment permit; owner-occupied; permit does not run with the land
ParkingIf a garage converts, replace its 2 spaces
FrontageCurb, gutter and sidewalk must be in place / repaired
SB284State rule governs anything stricter on 11,000+ sq ft lots — confirm specifics
BuilderCocoon Homes builds detached ADUs in Payson — design, permits and on-site construction.
Check my lot in Payson →Last reviewed October 6, 2026Official source ↗
Santaquin ADU rules (Utah County)
State rule appliesDetached ADUOrd. 09-01-2026 was on the Sept 15 council agenda — adoption not verified; allowed in R-15/R-20 already
Draft lot minimum11,000 sq ft with a single-family home (plus MSR, R-8, R-10, R-15 zones)
Draft size / height800 sq ft footprint, 1,600 sq ft total; no taller than the house or 24 ft
Draft setbacksRear yard only; 12 ft from the house; 10 ft from side & rear lines
Draft parking / occupancyUnder 650 sq ft: 1; 650+: 2; no tandem; owner in either unit
BuilderCocoon Homes builds ADUs in Santaquin. On qualifying lots (11,000+ sq ft, single-family home) the state rule allows a detached ADU now, even before the city finishes its ordinance.
Check my lot in Santaquin →Last reviewed October 6, 2026Official source ↗
Eagle Mountain ADU rules (Utah County)
AllowedDetached ADUAllowed — cottage/casita/guest house, where zoned (EMMC 17.70)
TypesBasement, attached, above-garage, or detached; one per lot
Owner-occupancyOwner lives in the home or the ADU
Rental30 consecutive days minimum
Next stepConfirm your zone allows detached ADUs (Ord. O-56-2025 amended the chapter)
BuilderCocoon Homes builds detached ADUs in Eagle Mountain — design, permits and on-site construction.
Check my lot in Eagle Mountain →Last reviewed October 6, 2026Official source ↗
Saratoga Springs ADU rules (Utah County)
AllowedDetached ADUAllowed — Ord. 26-42 adopted Sept 15, 2026; one ADU per lot; not in front yard or a public utility easement
Lot minimum11,000 sq ft or larger (19.20.06.1)
Size / heightNo larger than the house; counts toward lot coverage; no taller than the house
SetbacksTwo-story: side & rear setback equals the unit's height; confirm one-story setbacks
Parking / rentalUnder 650 sq ft: 1 added stall; 650+: 2; replace any lost garage stalls; 90-day minimum rental
BuilderCocoon Homes builds detached ADUs in Saratoga Springs — design, permits and on-site construction. See our Saratoga Springs ADU builder page →
Check my lot in Saratoga Springs →Last reviewed October 6, 2026Official source ↗
Midway ADU rules (Wasatch County)
State rule appliesDetached ADUNo detached ordinance adopted or on council agendas Aug 4 – Oct 6, 2026
SB284 coverageNot verified — confirm with the city whether Midway is covered
Internal ADUPermitted (May 2026 ordinance)
Resort-town noteShort-term rental overlay shrunk Sept 1, 2026 — verify STR rules
Next stepCall Midway Planning before designing
BuilderCocoon Homes builds ADUs in Midway. Detached eligibility isn't confirmed yet, so we check with Midway Planning before design; internal ADUs are permitted now.
Check my lot in Midway →Last reviewed October 6, 2026Official source ↗
No city match yet. We're adding cities every week - tell us which one you need and we'll prioritize it.
Where Cocoon Homes builds ADUs
Cocoon Homes builds ADUs in every city on this tracker. Find yours:
Salt Lake County
Salt Lake City · Salt Lake County (unincorporated) · West Valley City · West Jordan · Sandy · Draper · Murray · Herriman · Bluffdale
Davis County
Bountiful · Farmington · Kaysville · Layton · Syracuse
Weber and Wasatch counties
Utah County
Lehi · Highland · Alpine · Cedar Hills · American Fork · Pleasant Grove · Lindon · Orem · Vineyard · Provo · Springville · Mapleton · Spanish Fork · Salem · Payson · Santaquin · Eagle Mountain · Saratoga Springs
Headquartered in Lehi, with a model home you can tour by appointment · 801-919-9666
Utah ADU rules FAQ
The questions homeowners ask before calling their city
Are detached ADUs legal in Utah?
Yes. Utah's SB284 (Utah Code 10-21-304) took effect October 1, 2026, and it requires covered cities of 5,000 or more residents to permit a detached ADU as a permitted use on any lot of 11,000 sq ft or larger that has a single-family home. Cities can't require a conditional-use permit or cap the unit's size below the size of the main house, but they still set setbacks, height, parking, design, and owner-occupancy rules.
Does my city allow a detached ADU now?
On a qualifying lot, yes - in every covered city. Most Wasatch Front cities have adopted their own detached-ADU ordinance, including late adopters Saratoga Springs, Alpine, Sandy, Orem, American Fork, Lindon, Kaysville and Layton. A few (Provo, Santaquin, Vineyard, Bountiful) had not confirmed a final ordinance at our last review, so the state rule governs there until they do. Use the map and city list above, each with a link to the official source, then confirm with your city's planning department before you design or budget.
Who builds ADUs in Utah County?
Cocoon Homes, headquartered in Lehi, designs, permits and builds ADUs in all 18 Utah County cities on this tracker — including Lehi, Provo, Orem, American Fork, Saratoga Springs, Highland, Spanish Fork and Eagle Mountain — typically $85,000–$200,000 all-in.
Who builds ADUs in Salt Lake County?
Cocoon Homes builds ADUs across Salt Lake County, including Salt Lake City, Sandy, Draper, West Jordan, West Valley City, Murray, Herriman, Bluffdale and unincorporated Salt Lake County — typically $85,000–$200,000 all-in, with our model home in nearby Lehi.
Who builds ADUs in Davis and Weber counties?
Cocoon Homes builds ADUs in Bountiful, Farmington, Kaysville, Layton, Syracuse and Ogden, with design, permitting and on-site construction handled by one team.
Can I build an ADU in Lehi, Utah?
Yes. Lehi adopted its SB284 update on July 14, 2026: a detached ADU is allowed on single-family lots of 11,000 sq ft or more (down from 14,520), must be smaller than the main home (the old 1,300 sq ft cap was dropped), must sit at least 6 ft from the existing house, and the owner must live in either the main home or the ADU. Units over 650 sq ft need two parking spaces. Cocoon Homes is headquartered in Lehi and builds detached ADUs here.
Does Cocoon Homes build ADUs in my city?
If your city is on this tracker, yes — Cocoon Homes builds ADUs in all 34 of them. Tell us your address and we'll check your lot against your city's adopted rules before you spend anything on design.
What if my city hasn't updated its ordinance yet?
The state law applies anyway. Since October 1, 2026, a detached ADU on a qualifying lot (11,000 sq ft or larger, single-family home, single-family zone) is a permitted use whether or not the city has finished its rewrite. The city just has fewer locally tailored standards in place, so expect its ordinary setback, height and building-code rules to apply in the meantime.
Once my city approves it, what does an ADU cost?
A Cocoon ADU typically runs $85,000–$200,000 all-in; the home itself is about $63,000–$109,000 depending on model, with site work, utilities and city costs adding 35–50%. See the full breakdown and cost calculator on our Utah ADU cost guide.
Do these rules apply to tiny homes on wheels?
Generally no. SB284 covers foundation-built dwellings — most Utah cities classify a tiny home on wheels as an RV, which can't be a full-time residence on a standard residential lot. Eagle Mountain is the notable exception. We break down the legal difference in our ADU vs. tiny home guide.
Not sure how your lot reads under the new rules?
We build ADUs across the Wasatch Front and handle the part most homeowners dread - zoning, permitting, and hookups. Tell us your city and lot, and we'll tell you what's actually possible.
Ready to talk? Book a 30-minute call.
This tracker is general information from Cocoon Homes to help Utah homeowners get oriented - not legal advice, and not a substitute for your city's planning department or the current Utah Code. Cities rewrote their rules month to month through 2026, and some are still amending them after October 1; we note when each city was last reviewed, but always confirm specifics with your city before relying on them.