Seaport Real Estate Services Blog

While Connecticut state law requires all towns and cities to allow accessory dwelling units (ADUs) either by right or by special permit, individual towns and cities have the ability to create their own regulations and restrictions related to ADUs. As a result, some towns may not allow ADUs or may impose stricter regulations on them.

There are a variety of reasons why a town may not allow ADUs. One common concern is related to the potential impact on the character of a neighborhood or community. Some residents may worry that the addition of an ADU will change the nature of their community or that it will have a negative impact on property values. Other concerns may be related to traffic, parking, or overcrowding.

In addition, some towns may not have updated their zoning regulations to reflect the changes in state law that require ADUs to be allowed. Others may not have the resources to adequately review and process applications for ADUs, which can be time-consuming and require expertise in zoning and building regulations.

It's important to note that ADUs can be an effective way to address the affordable housing crisis and provide more flexible housing options for homeowners and renters. However, each town and city must balance the potential benefits of ADUs with the concerns and challenges that come with implementing them.

Connecticut state law requires that all towns and cities in the state allow Accessory Dwelling Units (ADUs) by right or by special permit. However, individual towns and cities can impose their own regulations and guidelines for ADUs. Here is a list of some Connecticut towns and cities that allow ADUs:

1. Avon
2. Bethany
3. Bethel
4. Bloomfield
5. Bolton
6. Branford
7. Bristol
8. Brookfield
9. Canton
10. Chaplin
11. Chester
12. Clinton
13. Colchester
14. Coventry
15. Cromwell
16. Danbury
17. Durham
18. East Haddam
19. East Hampton
20. East Windsor
21. Ellington
22. Essex
23. Farmington
24. Franklin
25. Glastonbury
26. Granby
27. Groton
28. Guilford
29. Haddam
30. Hamden
31. Hartford
32. Hebron
33. Killingworth
34. Lebanon
35. Ledyard
36. Madison
37. Manchester
38. Mansfield
39. Marlborough
40. Meriden
41. Middlebury
42. Middletown
43. Milford
44. Monroe
45. Montville
46. Naugatuck
47. New Canaan
48. New Fairfield
49. New Hartford
50. New London
51. New Milford
52. Newington
53. Newtown
54. North Branford
55. North Haven
56. Norwalk
57. Old Lyme
58. Old Saybrook
59. Orange
60. Oxford
61. Plainfield
62. Plainville
63. Plymouth
64. Pomfret
65. Portland
66. Prospect
67. Putnam
68. Redding
69. Ridgefield
70. Rocky Hill
71. Salem
72. Scotland
73. Seymour
74. Shelton
75. Somers
76. South Windsor
77. Sprague
78. Stafford
79. Stamford
80. Sterling
81. Stonington
82. Suffield
83. Thomaston
84. Tolland
85. Trumbull
86. Union
87. Vernon
88. Voluntown
89. Wallingford
90. Waterbury
91. Waterford
92. West Hartford
93. Westbrook
94. Weston
95. Westport
96. Willington
97. Wilton
98. Windsor
99. Windsor Locks
100. Wolcott
101. Woodbridge

This list is not exhaustive, and towns and cities may update their regulations and guidelines at any time. Homeowners who are interested in building an ADU in Connecticut should check with their local zoning department to confirm that ADUs are allowed and to learn about any specific requirements or guidelines.