ADUs are allowed in WillingtonTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Willington, CT
Is your property eligible for an ADU?
# of Properties
1,794
Owner-occupied
86%
Zoning districts
9
Avg Home Value
$162,138
Median Lot Size
2.22 acres
Avg Income
$100,731
Residential Types:
1,803 housing units
Single Family
97%
2-3 Family
3%
Zoning Districts:
2,799 parcels · 9 districts
R80
86%(2,420)
DCR
7%(208)
SWV
3%(95)
DC
2%(44)
Other
1%(32)
ADU Rules
What can you build in Willington, CT?
Willington, CT follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum size of 1,000 sq ft
- –Maximum size of 40% of the principal structure’s gross floor area
Detached ADU Size Limits
- –Maximum detached ADU size of 1,000 sq ft
- –Maximum detached ADU size of 40% of the principal structure’s gross floor area
- –As an accessory building, a detached ADU is limited to 20% of the principal building’s gross floor area (R-80 may be lower per Table 7.1)
Max Units
- –1 ADU per parcel/lot
Owner Occupancy
- –Owner-occupancy required; owner of record must occupy either unit six months.
Parking
- –No numeric min/max; adequate off-street parking on the same lot; driveway curb cuts not permitted; parking counted as 1 space per 10 ft by 20 ft driveway area for single- and two-family dwellings.
Rental Restrictions
- –Short-term rentals prohibited; ADU leases must be at least 90 days.
ADU State Law
What can you build in Connecticut?
- –Connecticut Public Act 21-29 (now CGS § 8-2o) established statewide ADU rules.
- –115 municipalities opted out of the state ADU provisions. In those towns, ADUs may still be allowed, but they are regulated solely under local zoning bylaws.
- –54 municipalities did not opt out and are subject to the state's default ADU standards. Local bylaws in these towns must allow at least the minimums required by state law.
- –At least one accessory apartment must be allowed as of right on any lot with a single-family home.
- –Towns must allow an ADU to be at least the lesser of 1,000 sq ft or 30% of the principal dwelling's Net Floor Area.
- –Setbacks, lot size, building frontage, lot coverage, height, and design requirements cannot be more restrictive than those applied to the principal dwelling.
- –Only one parking space can be required per ADU.
- –A passageway between units
- –A separate exterior entrance (unless required by code)
- –A relationship (e.g. familial or employment) between occupants
- –Age minimums for ADU tenants
- –Separate utility billing
- –Periodic permit renewals
- –Owner-occupancy is not required under state law, but towns may impose it.
- –Towns may regulate short-term rentals.
- –Requirements for wells or private sewerage systems still apply, but approval cannot be unreasonably withheld.
- –Towns may not condition ADU approval on fixing unrelated nonconformities on the lot.
- –No new utility connection fees may be charged unless the ADU is built with a new principal dwelling.
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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ADU rules in other Connecticut municipalities
Rules change at the town line. Check the municipality your property is actually in.
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