336 21st Street, Brooklyn

Small South Slope walk-up where the property carries no open housing violations while surrounding blocks see heavy street activity.

An eight-unit South Slope walk-up built in 1931 where operational filings against the property are absent. While the building's own file carries no open housing violations, street-level activity on the surrounding blocks is active. Three things to know:

Street parking within three blocks sees frequent turnover calls 109 illegal parking complaints were logged within three blocks over the last year, most recently on September 19, 2026. The calls center on 37 blocked hydrants and 27 blocked crosswalks, reflecting quick curb-turnover friction rather than stored cars.

Late-night party noise concentrates on neighboring blocks 39 residential noise calls occurred within three blocks over the last 12 months, running through August 9, 2026. 24 of these logged specifically for loud music and parties nearby.

Quieter signals on this building and the blocks around it:

• 32 general noise calls within three blocks last year, including 12 off-hours construction reports
• 25 dirty condition complaints within three blocks over the trailing 12 months
• 11 lead-kit requests logged within three blocks over the past year

336 21st Street is a 8-unit building in Brooklyn, New York City (BBL 3008980029). This building is associated with 3336 21st Street LLC. Brix tracks 0 open HPD violations for this property, along with inspection history, DOB filings, tenant complaints, and rent stabilization status.

Built in 1931, this walk-up apartment building sits in Brooklyn and is tracked by Brix using public NYC records from HPD, DOB, ACRIS, and 311.

The building last changed hands on May 21, 2024 for $1,050,000, according to recorded deeds.

Brix score: 90/100. View the Building Report on Brix.

See every NYC building owned by 3336 21st Street LLC on the landlord portfolio page.