ADU Journal
ADU Rules by State
Laws governing accessory dwelling units vary dramatically across the country — from highly permissive state preemption laws to restrictive local ordinances. Our jurisdiction database tracks setbacks, size limits, owner-occupancy requirements, permitting timelines, and recent legislative changes.
50
States tracked
0+
City & county pages
ADU Climate:
ADU-Friendly
Rapidly Evolving
Moderate
Restrictive
AL
28
Alabama
Restrictive
AK
35
Alaska
Moderate
AZ
55
Arizona
Moderate
AR
25
Arkansas
Restrictive
CA
85
California
ADU-Friendly
CO
70
Colorado
ADU-Friendly
CT
52
Connecticut
Moderate
DE
40
Delaware
Moderate
FL
40
Florida
Moderate
GA
42
Georgia
Moderate
HI
72
Hawaii
ADU-Friendly
ID
30
Idaho
Restrictive
IL
48
Illinois
Moderate
IN
32
Indiana
Restrictive
IA
30
Iowa
Restrictive
KS
28
Kansas
Restrictive
KY
30
Kentucky
Restrictive
LA
28
Louisiana
Restrictive
ME
50
Maine
Moderate
MD
65
Maryland
ADU-Friendly
MA
70
Massachusetts
ADU-Friendly
MI
40
Michigan
Moderate
MN
45
Minnesota
Moderate
MS
22
Mississippi
Restrictive
MO
30
Missouri
Restrictive
MT
28
Montana
Restrictive
NE
28
Nebraska
Restrictive
NV
48
Nevada
Moderate
NH
48
New Hampshire
Moderate
NJ
48
New Jersey
Moderate
NM
38
New Mexico
Moderate
NY
50
New York
Moderate
NC
45
North Carolina
Moderate
NO
25
North Dakota
Restrictive
OH
38
Ohio
Moderate
OK
28
Oklahoma
Restrictive
OR
79
Oregon
ADU-Friendly
PA
42
Pennsylvania
Moderate
RI
65
Rhode Island
ADU-Friendly
SC
30
South Carolina
Restrictive
SD
25
South Dakota
Restrictive
TN
40
Tennessee
Moderate
TX
45
Texas
Moderate
UT
52
Utah
Moderate
VT
68
Vermont
ADU-Friendly
VA
52
Virginia
Moderate
WA
75
Washington
ADU-Friendly
WV
22
West Virginia
Restrictive
WI
42
Wisconsin
Moderate
WY
22
Wyoming
Restrictive