Hastings on Hudson ADU Zoning Guide

Last reviewed 2026-04-26

Max size850 sq ft
Owner occupancyRequired

Hastings on Hudson has established clear ADU guidelines that, while having specific requirements, provide a pathway for homeowners to build on their existing property. Whether you're considering a primary residence for a family member, a rental income source, or an independent square footage for your growing family, understanding the local zoning rules is essential to moving forward with confidence. We've reviewed Hastings on Hudson's zoning regulations in detail and outlined the key requirements below. Rules can change, so confirm details with the Hastings on Hudson Planning Department or book a free consultation with our team before starting your project.

Status

Adoption status: Active — ADUs (accessory apartments) were first authorized approximately 2003 by Village local law; as of November 2024, 22 ADUs have been approved/built in the Village
Governing ordinance: Village of Hastings-on-Hudson Zoning Code Chapter 295 (referenced by Planning Board as governing section 295-103); ADU approval authority resides in the Planning Board per §295-103
Subsequent relaxation: The Village has relaxed ADU restrictions since original adoption, as noted in November 2024 regional memo

Eligibility

Where ADUs are allowed

Zoning districts permitted: All single-family residential zoning districts — R-20, R-10, R-7.5, 2R
Lot type / use restrictions: Single-family residential properties; lot must have more than 2,000 sq ft of lot area
Minimum lot area required: Greater than 2,000 sq ft
Limit per property: One ADU per lot

Types allowed

Attached ADU (interior conversion): Yes — basement, attic conversions confirmed
Attached ADU (addition): Yes
Detached ADU (garage conversion): Yes — garage conversions confirmed
Detached ADU (new construction): Yes — small stand-alone units on a single-family lot are listed as a permitted type
OFA secondary source: Lists only attached/converted types; the Village official sources are more expansive and are controlling

Size and placement

Size limits

Minimum sq ft: 300 sq ft
Maximum sq ft: 850 sq ft and no more than 33% of the principal dwelling's floor area; the Planning Board may approve an exception to the 33% cap
Maximum bedrooms: 2 bedrooms
Maximum roof height (accessory structure): 15 ft

Setbacks

General rule: Must comply with Chapter 295 setback requirements applicable to the zone; the OFA source notes there are "specific yard specifications" but does not reproduce numeric values
Residential districts noted in Chapter 295: R-20, R-10, R-7.5, 2R

Rules for use

Parking

1-bedroom ADU: 1 additional off-street parking space required
2-bedroom ADU: 2 additional off-street parking spaces required
Location: All parking spaces must be on the same property as the ADU

Owner occupancy

Required: Yes — the owner of the single-family residence must occupy one of the dwelling units on the premises as their principal residence

Rental use

Short-term rental: Likely prohibited; Village sources describe ADUs as providing housing for long-term tenants (teachers, students, first responders) and the Plus One program requires no STR use
Long-term rental: Permitted; generates rental income for homeowners

How to apply in Hastings on Hudson

Planning Board approval required: Planning Board issues ADU permits per §295-103; public hearing required
Building permit: Required from Village Building Inspector
Timeline: Permit approval typically takes 4 to 8 weeks on average
ADU Application: Downloadable ADU Application form available from the Planning Board
Application submission deadline: New applications must be submitted to the Building Inspector at least four weeks prior to the scheduled Planning Board meeting date
Contact: Village of Hastings-on-Hudson Planning Board / Building Inspector, 7 Maple Avenue, Hastings-on-Hudson, NY 10706

Recent and pending changes

Law originally adopted ~2003; relaxed over time
The Greenburgh Town Board memo (November 2024) notes Hastings-on-Hudson law was approved in 2003 and the Village "recently relaxed restrictions"
July 2025 Plus One ADU info session
The Village hosted a new Plus One ADU informational webinar in July 2025, indicating active program promotion

Important details

Plus One ADU Program: Up to $125,000 available per property through Westchester County Habitat for Humanity and Housing Action Council. Services include design, budgeting, permitting, environmental assessment, contractor selection, and construction. Eligibility: household income at or below 100% of Westchester AMI, adjusted for family size
Application instructions: The Village Planning Board's website provides a downloadable ADU Application form and an application instruction sheet
Track record: As of November 2024, Hastings-on-Hudson had 22 ADUs approved/built, among the higher counts of any Westchester village; the Building Inspector characterized the program as running smoothly with very few neighbor complaints in 12+ years

Frequently asked questions

How much of my house can an ADU be in Hastings on Hudson?

In Hastings on Hudson, an accessory apartment must be between 300 and 850 square feet and cannot exceed 33 percent of the principal dwelling's floor area (unless the Planning Board approves an exception).

Do I need to live in my house to have an ADU in Hastings on Hudson?

Yes, owner occupancy is required. The owner of the single-family residence must occupy one of the dwelling units on the premises as their principal residence.

How many parking spaces must I provide for an ADU in Hastings on Hudson?

One additional off-street parking space is required for a one-bedroom ADU, or two spaces if the ADU has two bedrooms. Parking must be located on the same property.

Sources (7)

Last reviewed 2026-04-26. Local rules can change — verify the latest details with the Hastings on Hudson planning department, or book a free consultation with our team before starting your project. This page is informational and is not legal advice.

Hastings on Hudson ADU regulations.