ADU Rules: Stamford vs Stratford
How do adu rules rules compare between Stamford, CT and Stratford, CT?
Stamford and Stratford have similar restriction levels.
Stamford, CT
Fairfield County
Stamford allows ADUs as of right per CT PA 21-29. High housing costs in the Gold Coast make ADUs an important affordability tool. North Stamford's larger lots accommodate detached ADUs more readily.
View full Stamford rules →Stratford, CT
Fairfield County
Connecticut abolished operational county governments in 1960; Fairfield County is a Census/judicial region only. ADU regulation occurs at the town level under home rule and is governed by Conn. Gen. Stat. Sec. 8-2 (zoning enabling act). Public Act 21-29 (HB 6107, 2021) requires municipalities zoning under Sec. 8-2 to allow ADUs as of right on lots with single-family homes unless the town has formally opted out. Major Fairfield County towns including Stamford, Bridgeport, Norwalk, Greenwich, and Danbury each set their own ADU dimensional, occupancy, and permit standards through local zoning regulations.
View full Stratford rules →Key Facts Comparison
| Fact | Stamford | Stratford |
|---|---|---|
| State Mandate | PA 21-29 as of right | - |
| Housing Costs | Among highest in CT | - |
| Best Fit | North Stamford lots | - |
| Permit | Building permit required | - |
| County Government | - | None (abolished 1960) |
| State Statute | - | Conn. Gen. Stat. Sec. 8-2 |
| Statewide ADU Law | - | Public Act 21-29 (HB 6107, 2021) |
| As-of-Right Default | - | Yes, unless town opts out |
| Permit Authority | - | Each town's P&Z and Building Dept. |
| Affordable Housing | - | ADUs without deed restrictions don't count toward Sec. 8-30g base |
Highlighted rows indicate differences between cities.
Stamford FAQ
Can I build an ADU?
Yes. CT law (PA 21-29) requires towns to allow ADUs as of right on single-family lots.
Can Stamford deny my ADU application?
Towns cannot effectively prohibit ADUs but may impose reasonable regulations on size, setbacks, and design.
Stratford FAQ
Does Fairfield County issue ADU permits?
No. Connecticut abolished operational county governments in 1960. Fairfield County is only a Census and judicial region. Every ADU permit is issued by the individual town (Stamford, Bridgeport, Norwalk, Greenwich, Danbury, etc.) under its own zoning regulations and Conn. Gen. Stat. Sec. 8-2.
Can my Fairfield County town refuse to allow an ADU?
Possibly. Public Act 21-29 (HB 6107, 2021) makes ADUs as-of-right on single-family lots unless the town formally opted out by following the statutory opt-out procedure. Some Fairfield County towns have used the opt-out provision to retain stricter rules, so check with your local Planning & Zoning office.
Compare other topics
See how Stamford and Stratford compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool