5221 20th Avenue, Brooklyn
Single family · built c. 1925 · Block 5476, Lot 1.
Building permits
- New Building — Multi-Family, filed May 27, 2026, 3 units, 3 stories, described as “New 3-story & cellar residential building.”
- New Building — Multi-Family, filed Mar 13, 2026, 3 units, 3 stories, described as “New 3-story & cellar residential building.”
- Alteration, filed Dec 19, 2025, estimated cost $1K, described as “Proposed construction fence”
- Demolition, filed Dec 11, 2025, estimated cost $70K, described as “Full demolition of existing 2 1/2 story house”
- Alteration, filed Apr 4, 2024, estimated cost $25K, described as “Filing for Fence application”
- Alteration, filed Feb 12, 2024, estimated cost $5K, described as “Curb cut filing”
- Alteration, filed Aug 4, 2022
Property taxes
- Assessment
- $115,020
- 2026–27 tax
- $10,249
- Market value (city estimate)
- $1,917,000
- Taxable value
- $51,650
- Assessed land
- $39,720
- Assessed improvements
- $75,300
Zoning
R5: floor area ratio 0.36 built, 1.50 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.