Utah city ADU rules
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County
Salt Lake County
20 cities
- Salt Lake City
204,657 residents · Specified municipality
Salt Lake City: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- West Valley City
136,650 residents · Specified municipality
West Valley City: internal ADUs allowed; detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- West Jordan✓ Verified Sept 2026
116,688 residents · Specified municipality
West Jordan: internal ADUs allowed; detached ADUs allowed (lot 10,000+ sq ft).
- Sandy
93,022 residents · Specified municipality
Sandy: internal ADUs allowed; detached ADUs are not generally allowed today. Beginning October 1, 2026, state law (S.B. 284) requires the city to permit a detached ADU on qualifying single-family lots of 11,000 sq ft or more. Owner occupancy applies.
- South Jordan✓ Verified Sept 2026
86,156 residents · Specified municipality
South Jordan: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 6,000+ sq ft). Owner occupancy applies.
- Millcreek
63,034 residents · Specified municipality
Millcreek: internal ADUs allowed; detached ADUs allowed (lot 8,000+ sq ft). Owner occupancy applies.
- Herriman✓ Verified Sept 2026
62,352 residents · Specified municipality
Herriman: internal ADUs allowed; detached ADUs allowed (lot 10,000+ sq ft). Owner occupancy applies.
- Taylorsville
57,879 residents · Specified municipality
Taylorsville: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Draper
50,731 residents · Specified municipality
Draper: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 12,000+ sq ft). Owner occupancy applies.
- Murray
49,463 residents · Specified municipality
Murray: internal ADUs allowed; detached ADUs allowed (lot 10,000+ sq ft).
- Riverton✓ Verified Sept 2026
46,680 residents · Specified municipality
Riverton: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- Kearns✓ Verified Sept 2026
39,398 residents · Specified municipality
Kearns: internal ADUs allowed (lot 5,000+ sq ft); detached ADUs allowed (lot 5,000+ sq ft). Owner occupancy applies.
- Midvale✓ Verified Sept 2026
36,219 residents · Specified municipality
Midvale: internal ADUs allowed (lot 6,001+ sq ft); detached ADUs allowed (lot 6,001+ sq ft). Owner occupancy applies.
- Cottonwood Heights✓ Verified Sept 2026
32,437 residents · Specified municipality
Cottonwood Heights: internal ADUs allowed (lot 6,001+ sq ft); detached ADUs allowed with conditions. Owner occupancy applies.
- Magna✓ Verified Sept 2026
31,381 residents · Specified municipality
Magna: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 8,000+ sq ft). Owner occupancy applies.
- Holladay✓ Verified Sept 2026
30,588 residents · Specified municipality
Holladay: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- South Salt Lake
26,003 residents · Specified municipality
South Salt Lake: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 6,000+ sq ft). Owner occupancy applies.
- Bluffdale
19,080 residents · Specified municipality
Bluffdale: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 11,000+ sq ft).
- White City
5,598 residents · Specified municipality
White City: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Emigration Canyon
1,484 residents
Emigration Canyon: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
Cities in this county by population
- Salt Lake City204,657
- West Valley City136,650
- West Jordan116,688
- Sandy93,022
- South Jordan86,156
- Millcreek63,034
- Herriman62,352
- Taylorsville57,879
- Draper50,731
- Murray49,463
- Riverton46,680
- Kearns39,398
County
Utah County
21 cities
- Provo
113,523 residents · Specified municipality
Provo: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft). Owner occupancy applies.
- Orem
95,910 residents · Specified municipality
Orem: internal ADUs allowed; detached ADUs are not generally allowed today. Beginning October 1, 2026, state law (S.B. 284) requires the city to permit a detached ADU on qualifying single-family lots of 11,000 sq ft or more. Owner occupancy applies.
- Lehi✓ Verified Sept 2026
93,446 residents · Specified municipality
Lehi: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- Saratoga Springs✓ Verified Sept 2026
57,411 residents · Specified municipality
Saratoga Springs: internal ADUs allowed only in limited cases (lot 6,000+ sq ft); detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- Eagle Mountain
54,149 residents · Specified municipality
Eagle Mountain: internal ADUs allowed; detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- Spanish Fork
44,102 residents · Specified municipality
Spanish Fork: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 6,000+ sq ft). Owner occupancy applies.
- Pleasant Grove
37,630 residents · Specified municipality
Pleasant Grove: internal ADUs allowed; detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- American Fork
37,268 residents · Specified municipality
American Fork: internal ADUs allowed; detached ADUs are not generally allowed today. Beginning October 1, 2026, state law (S.B. 284) requires the city to permit a detached ADU on qualifying single-family lots of 11,000 sq ft or more. Owner occupancy applies.
- Springville
35,832 residents · Specified municipality
Springville: internal ADUs allowed; detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- Payson
22,516 residents · Specified municipality
Payson: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- Highland
19,902 residents · Specified municipality
Highland: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft). Owner occupancy applies.
- Santaquin
16,898 residents · Specified municipality
Santaquin: internal ADUs allowed; detached ADUs allowed (lot 11,000+ sq ft).
- Vineyard
14,535 residents · Specified municipality
Vineyard: internal ADUs allowed (lot 5,200+ sq ft); detached ADUs allowed (lot 12,000+ sq ft).
- Mapleton
12,999 residents · Specified municipality
Mapleton: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- Lindon
11,704 residents · Specified municipality
Lindon: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- Salem
10,393 residents · Specified municipality
Salem: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 11,000+ sq ft).
- Alpine
10,304 residents · Specified municipality
Alpine: internal ADUs allowed; detached ADUs are not generally allowed today. Beginning October 1, 2026, state law (S.B. 284) requires the city to permit a detached ADU on qualifying single-family lots of 11,000 sq ft or more. Owner occupancy applies.
- Cedar Hills
9,956 residents · Specified municipality
Cedar Hills: internal ADUs allowed; detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- Elk Ridge
4,907 residents
Elk Ridge: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
- Genola
1,585 residents
Genola: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
- Woodland Hills
1,553 residents
Woodland Hills: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
Cities in this county by population
- Provo113,523
- Orem95,910
- Lehi93,446
- Saratoga Springs57,411
- Eagle Mountain54,149
- Spanish Fork44,102
- Pleasant Grove37,630
- American Fork37,268
- Springville35,832
- Payson22,516
- Highland19,902
- Santaquin16,898
County
Davis County
15 cities
- Layton
82,601 residents · Specified municipality
Layton: internal ADUs allowed; detached ADUs allowed (lot 6,000+ sq ft). Owner occupancy applies.
- Bountiful
44,481 residents · Specified municipality
Bountiful: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed with conditions (lot 8,000+ sq ft). Owner occupancy applies.
- Syracuse
35,561 residents · Specified municipality
Syracuse: internal ADUs allowed with conditions (lot 6,000+ sq ft); detached ADUs allowed with conditions (lot 10,000+ sq ft).
- Clearfield
34,062 residents · Specified municipality
Clearfield: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed. Owner occupancy applies.
- Kaysville✓ Verified Sept 2026
33,252 residents · Specified municipality
Kaysville: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- Farmington
25,660 residents · Specified municipality
Farmington: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 10,000+ sq ft).
- Clinton
23,538 residents · Specified municipality
Clinton: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- North Salt Lake
22,537 residents · Specified municipality
North Salt Lake: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed. Owner occupancy applies.
- Centerville
16,502 residents · Specified municipality
Centerville: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs are not generally allowed today. Beginning October 1, 2026, state law (S.B. 284) requires the city to permit a detached ADU on qualifying single-family lots of 11,000 sq ft or more.
- West Point
11,892 residents · Specified municipality
West Point: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Woods Cross
11,487 residents · Specified municipality
Woods Cross: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs are not generally allowed today. Beginning October 1, 2026, state law (S.B. 284) requires the city to permit a detached ADU on qualifying single-family lots of 11,000 sq ft or more.
- South Weber
8,124 residents · Specified municipality
South Weber: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Fruit Heights
5,971 residents · Specified municipality
Fruit Heights: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- West Bountiful
5,888 residents · Specified municipality
West Bountiful: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Sunset
5,372 residents · Specified municipality
Sunset: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
Cities in this county by population
- Layton82,601
- Bountiful44,481
- Syracuse35,561
- Clearfield34,062
- Kaysville33,252
- Farmington25,660
- Clinton23,538
- North Salt Lake22,537
- Centerville16,502
- West Point11,892
- Woods Cross11,487
- South Weber8,124
County
Weber County
14 cities
- Ogden
86,825 residents · Specified municipality
Ogden: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed. Owner occupancy applies.
- Roy
38,785 residents · Specified municipality
Roy: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs are not generally allowed today. Beginning October 1, 2026, state law (S.B. 284) requires the city to permit a detached ADU on qualifying single-family lots of 11,000 sq ft or more.
- West Haven
22,395 residents · Specified municipality
West Haven: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed. Owner occupancy applies.
- North Ogden
21,855 residents · Specified municipality
North Ogden: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 11,000+ sq ft).
- South Ogden
17,716 residents · Specified municipality
South Ogden: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 10,000+ sq ft). Owner occupancy applies.
- Pleasant View✓ Verified Sept 2026
11,337 residents · Specified municipality
Pleasant View: internal ADUs allowed only in limited cases; detached ADUs are limited today. Beginning October 1, 2026, state law (S.B. 284) requires the city to permit a detached ADU on qualifying single-family lots of 11,000 sq ft or more. Owner occupancy applies.
- Hooper
9,300 residents · Specified municipality
Hooper: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Riverdale
9,285 residents · Specified municipality
Riverdale: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Washington Terrace
9,160 residents · Specified municipality
Washington Terrace: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Farr West
8,027 residents · Specified municipality
Farr West: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Plain City
7,833 residents · Specified municipality
Plain City: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Harrisville
6,876 residents · Specified municipality
Harrisville: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Marriott-Slaterville
2,206 residents
Marriott-Slaterville: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
- Uintah
1,422 residents
Uintah: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
Cities in this county by population
- Ogden86,825
- Roy38,785
- West Haven22,395
- North Ogden21,855
- South Ogden17,716
- Pleasant View11,337
- Hooper9,300
- Riverdale9,285
- Washington Terrace9,160
- Farr West8,027
- Plain City7,833
- Harrisville6,876
County
Washington County
5 cities
- St. George✓ Verified Sept 2026
106,288 residents · Specified municipality
St. George: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- Washington
32,709 residents · Specified municipality
Washington: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Hurricane✓ Verified Sept 2026
25,745 residents · Specified municipality
Hurricane: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- Ivins✓ Verified Sept 2026
11,546 residents · Specified municipality
Ivins: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- Santa Clara✓ Verified Sept 2026
8,722 residents · Specified municipality
Santa Clara: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 6,000+ sq ft). Owner occupancy applies.
Cities in this county by population
- St. George106,288
- Washington32,709
- Hurricane25,745
- Ivins11,546
- Santa Clara8,722
County
Cache County
6 cities
- Logan
52,778 residents · Specified municipality
Logan: internal ADUs allowed; detached ADUs allowed (lot 11,000+ sq ft). Owner occupancy applies.
- Smithfield✓ Verified Sept 2026
15,018 residents · Specified municipality
Smithfield: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- North Logan✓ Verified Sept 2026
11,727 residents · Specified municipality
North Logan: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- Providence✓ Verified Sept 2026
9,447 residents · Specified municipality
Providence: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- Nibley✓ Verified Sept 2026
8,615 residents · Specified municipality
Nibley: internal ADUs allowed; detached ADUs allowed (lot 10,000+ sq ft).
- Hyde Park✓ Verified Sept 2026
5,766 residents · Specified municipality
Hyde Park: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 6,000+ sq ft). Owner occupancy applies.
Cities in this county by population
- Logan52,778
- Smithfield15,018
- North Logan11,727
- Providence9,447
- Nibley8,615
- Hyde Park5,766
County
Tooele County
5 cities
- Tooele✓ Verified Sept 2026
40,919 residents · Specified municipality
Tooele: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 8,500+ sq ft). Owner occupancy applies.
- Grantsville
14,417 residents · Specified municipality
Grantsville: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 12,000+ sq ft).
- Erda
10,000 residents · Specified municipality
Erda: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Lake Point
4,000 residents
Lake Point: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
- Wendover
1,135 residents
Wendover: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
Cities in this county by population
- Tooele40,919
- Grantsville14,417
- Erda10,000
- Lake Point4,000
- Wendover1,135
County
Box Elder County
8 cities
- Brigham City✓ Verified Sept 2026
20,319 residents · Specified municipality
Brigham City: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- Tremonton✓ Verified Sept 2026
12,677 residents · Specified municipality
Tremonton: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- Perry
5,828 residents · Specified municipality
Perry: internal ADUs allowed; detached ADUs allowed with conditions (lot 11,000+ sq ft).
- Garland
2,613 residents
Garland: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
- Willard
2,224 residents
Willard: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
- Honeyville
1,725 residents
Honeyville: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
- Mantua
1,256 residents
Mantua: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
- Elwood
1,249 residents
Elwood: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
Cities in this county by population
- Brigham City20,319
- Tremonton12,677
- Perry5,828
- Garland2,613
- Willard2,224
- Honeyville1,725
- Mantua1,256
- Elwood1,249
County
Iron County
1 city
Cities in this county by population
- Cedar City40,885
County
Wasatch County
2 cities
- Heber City✓ Verified Sept 2026
19,651 residents · Specified municipality
Heber City: internal ADUs allowed; detached ADUs allowed. Owner occupancy applies.
- Midway✓ Verified Sept 2026
6,011 residents
Midway: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed only in limited cases (lot 22,000+ sq ft).
Cities in this county by population
- Heber City19,651
- Midway6,011
County
Summit County
5 cities
- Park City✓ Verified Sept 2026
8,292 residents · Specified municipality
Park City: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 3,750+ sq ft). Owner occupancy applies.
- Kamas
2,185 residents
Kamas: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
- Francis
1,722 residents
Francis: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
- Oakley
1,599 residents
Oakley: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
- Coalville
1,524 residents
Coalville: internal ADUs allowed with conditions; detached ADUs allowed only in limited cases.
Cities in this county by population
- Park City8,292
- Kamas2,185
- Francis1,722
- Oakley1,599
- Coalville1,524