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52 of 144 properties in Washington Heights are eligible for an accessory dwelling unit. 36.1% eligibility rate based on real NYC property data.
144
Total Properties
52
ADU Eligible
36.1%
Eligibility Rate
R10 / R10A
Top Zones
1,901 ft²
Avg Lot Size
$3K–$5K
Est. Monthly Rent
Under NYC Local Laws 126 & 127 (City of Yes for Housing Opportunity), homeowners in eligible zoning districts can add an accessory dwelling unit to their property.
36.1% of Washington Heights properties qualify
Based on property data, here are the ADU types that Washington Heights homeowners can build.
Convert existing basement or interior space into a self-contained dwelling unit with separate entrance, kitchen, bathroom, and sleeping area.
Build a new ADU attached to the existing home -- such as a side or rear addition. Shares at least one wall with the primary structure.
Construct a standalone cottage in the rear yard. Up to 800 sq ft under NYC rules. Requires sufficient lot area and setbacks.
Estimated costs and rental income based on real data from eligible properties in Washington Heights.
$250,000 – $500,000
Est. Construction Cost
$3,000 – $5,000/mo
Est. Monthly Rent
$48,000/yr
Est. Annual Income
Estimates are based on aggregate data from eligible properties in Washington Heights. Actual costs vary by ADU type, size, site conditions, and finishes. Using HPD pre-approved plans can save $15,000–$40,000 on design costs.
Up to $395,000 in combined loans and grants (including up to $175,000 as a grant) for eligible Washington Heights homeowners. Must be owner-occupied, below 165% AMI, and commit to a 10-year rental period.
Based on our analysis of 144 properties in Washington Heights, Manhattan, 52 are eligible for an ADU under NYC Local Laws 126 & 127. That is a 36.1% eligibility rate. The most common zoning districts are R10, R10A.
Properties in Washington Heights are eligible for Basement/Interior Conversion, Attached ADU, Detached Backyard ADU. The best option depends on your lot size (average in Washington Heights is 1,901 sq ft), existing structures, and budget. Use our eligibility checker for a personalized assessment.
Based on eligible properties in Washington Heights, estimated ADU construction costs range from $250,000 to $500,000. Actual costs depend on the ADU type, size, site conditions, and finishes. Using HPD pre-approved plans can save $15,000-$40,000 on design costs.
ADUs in Washington Heights, Manhattan can generate an estimated $3,000 to $5,000 per month in rental income. At $4,000 per month, that is approximately $48,000 per year in gross rental income.
Yes. The Plus One ADU Program offers up to $395,000 in combined loans and grants (including up to $175,000 as a grant) for eligible homeowners in Washington Heights and all NYC neighborhoods. You must be owner-occupied, below 165% AMI, and commit to a 10-year rental period. Applications are open until June 12, 2026.
Explore ADU eligibility in areas near Washington Heights.
Astoria
Queens
5,955
Properties
3,540
Eligible
59.4%
Rate
Sunnyside
Queens
1,155
Properties
437
Eligible
37.8%
Rate
Woodside
Queens
1,222
Properties
566
Eligible
46.3%
Rate
Jackson Heights
Queens
7,958
Properties
3,509
Eligible
44.1%
Rate
Maspeth
Queens
6,522
Properties
2,764
Eligible
42.4%
Rate
Ridgewood
Queens
2,863
Properties
1,164
Eligible
40.7%
Rate
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