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421 of 2,128 properties in Forest Hills are eligible for an accessory dwelling unit. 19.8% eligibility rate based on real NYC property data.
2,128
Total Properties
421
ADU Eligible
19.8%
Eligibility Rate
R4B / R4
Top Zones
3,496 ft²
Avg Lot Size
$2K–$3K
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.
19.8% of Forest Hills properties qualify
Based on property data, here are the ADU types that Forest Hills homeowners can build.
Construct a standalone cottage in the rear yard. Up to 800 sq ft under NYC rules. Requires sufficient lot area and setbacks.
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.
Estimated costs and rental income based on real data from eligible properties in Forest Hills.
$120,000 – $300,000
Est. Construction Cost
$1,800 – $2,500/mo
Est. Monthly Rent
$25,800/yr
Est. Annual Income
Estimates are based on aggregate data from eligible properties in Forest Hills. 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 Forest Hills homeowners. Must be owner-occupied, below 165% AMI, and commit to a 10-year rental period.
Based on our analysis of 2,128 properties in Forest Hills, Queens, 421 are eligible for an ADU under NYC Local Laws 126 & 127. That is a 19.8% eligibility rate. The most common zoning districts are R4B, R4, R3A.
Properties in Forest Hills are eligible for Detached Backyard ADU, Basement/Interior Conversion, Attached ADU. The best option depends on your lot size (average in Forest Hills is 3,496 sq ft), existing structures, and budget. Use our eligibility checker for a personalized assessment.
Based on eligible properties in Forest Hills, estimated ADU construction costs range from $120,000 to $300,000. 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 Forest Hills, Queens can generate an estimated $1,800 to $2,500 per month in rental income. At $2,150 per month, that is approximately $25,800 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 Forest Hills 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 Forest Hills.
Rego Park
Queens
4,435
Properties
1,978
Eligible
44.6%
Rate
Kew Gardens
Queens
911
Properties
399
Eligible
43.8%
Rate
Woodhaven
Queens
3,345
Properties
465
Eligible
13.9%
Rate
Richmond Hill
Queens
7,788
Properties
1,334
Eligible
17.1%
Rate
Glendale
Queens
7,325
Properties
3,200
Eligible
43.7%
Rate
Ozone Park
Queens
7,503
Properties
1,777
Eligible
23.7%
Rate
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