ADUs are allowed in Town Of SouthamptonTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Town Of Southampton, NY
Is your property eligible for an ADU?
# of Properties
37,095
Owner-occupied
33%
Zoning districts
51
Avg Home Value
$1,147,700
Median Lot Size
0.54 acres
Avg Income
$149,175
Residential Types:
42,190 housing units
2-3 Family
82%
Apts (4+ units)
17%
Condos
1%
Zoning Districts:
40,232 parcels · 51 districts
R20
25%(10,220)
R40
17%(7,040)
CR200
16%(6,497)
R15
7%(2,780)
Other
34%(13,695)
ADU Rules
What can you build in Town Of Southampton, NY?
Town Of Southampton, NY 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: Conditional Use Permit
Interior / Attached ADU Size Limits
- –Maximum size is the lesser of 35% of the principal dwelling’s total floor area and 1,000 sq ft.
Detached ADU Size Limits
- –Maximum size is the lesser of 35% of the principal dwelling’s total floor area and 1,000 sq ft
Max Units
- –1 per lot (accessory apartment)
Owner Occupancy
- –Owner must reside in the principal dwelling or the ADU.
Parking
- –1 space/ADU (studio or 1BR); 2 spaces for 2BR; spaces may not be in the required front yard; building dept may require additional spaces if occupants own more than one vehicle.
Rental Restrictions
- –Rental permit required before occupancy; post-2019 approvals must document rent at or below HUD FMR and income-qualified tenants; minimum one-year leases and no seasonal/short-term occupancy.
ADU State Law
What can you build in New York?
- –New York does not have a statewide ADU law; all ADU rules are set by individual municipalities.
- –ADUs may also be referenced as "accessory apartments" or "accessory living units," and definitions are not standardized statewide.
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.
Check my propertyHow can we help you?
Get matched with trusted local builders
Understand what's allowed on your property
Learn the key rules and size limits for ADUs
Is your property eligible for an ADU?
ADU rules in other New York municipalities
Rules change at the town line. Check the municipality your property is actually in.
Suffolk County
Town Of BabylonTown Of BrookhavenTown Of East HamptonTown Of HuntingtonTown Of IslipTown Of RiverheadTown Of SmithtownTown Of SoutholdVillage Of AmityvilleVillage Of AsharokenVillage Of BabylonVillage Of Belle TerreVillage Of BellportVillage Of BrightwatersVillage Of Dering HarborVillage Of East HamptonVillage Of GreenportVillage Of Head Of The HarborVillage Of Huntington BayVillage Of IslandiaVillage Of Lake GroveVillage Of LindenhurstVillage Of Lloyd HarborVillage Of Nissequogue