Building report

309 Knickerbocker Avenue · Brooklyn · BBL 3032200001 · generated 2026-10-20 · FREE Print / save PDF

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Where the penalty points come from

Open with the city right now

status snapshot refreshed weekly from HPD records

Patterns

4 heat or hot-water complaints in the last three years (winter 2025–26: 4).

No bedbug-infested units reported in the last three years of filings.

What 311 hears from this address

22 service requests in the last three years. Most common: Graffiti (3) · Dirty Condition (3) · Illegal Parking (2) · Noise (2) · Vendor Enforcement (2) · UNSANITARY CONDITION (2).

Filed construction activity

$114,800 in permitted construction work filed since 2016 (2 filings with a declared cost) — a rough measure of how actively the owner maintains the building. Permit costs cover filed construction work only — they do not capture routine maintenance or repairs done without a permit.

Rent-stabilization signals

2 of 3 signals present. This is the classic profile of a rent-stabilized building (pre-1974, 6+ units) — many units in such buildings remain stabilized. The definitive answer for any unit: request its rent history from NYS Homes & Community Renewal (free, at hcr.ny.gov).

Registered with HPD — the names behind the building

as filed by the owner in the building's HPD registration

What the city thinks it's worth

The city's market estimate has risen 21% between tax years 2025 and 2027.

Restaurants in this building

Report to 311: Food poisoning · Food safety complaint

1 restaurant · 0 with mice evidence · See them on the Mice Map

1 Food Establishment complaint to 311 at this address in the last three years (most often: Rodents/Insects/Garbage) · complaints filed by the public; DOHMH investigates, outcomes aren't published.

Flood exposure

Not in the FEMA 1%-annual-chance floodplain (2015 preliminary maps).

Not in a hurricane evacuation zone.

Not in the city's stormwater (cloudburst) flood maps under any modeled scenario.

6 street-flooding or sewer-backup complaints at this address since 2010 (1 in the last three years).

Sources: FEMA flood maps (coastal), NYC DEP Stormwater Flood Maps (cloudburst), NYC hurricane evacuation zones, and 311 records for this address.

Getting around

Distances are straight-line, not walking routes. Transit locations from the MTA and Citi Bike, bike facilities from NYC DOT, school zones from the DOE's 2024–25 maps.

Report a problem to 311

309 Knickerbocker Avenue Copy address

22 311 service requests from this address in the last three years — 2 of them about heat or hot water.

311 will ask for the address, the apartment if the problem is inside, and what's wrong. Contact details are optional for most complaints; food-poisoning reports can be anonymous. Complaints appear in the city's public 311 data, usually within a day or two, and then in the Live from 311 box on this page.

Sales, deeds & mortgages

Most recent mortgage recorded against this lot: $750,000 on 2004-09-23 (lender: Astoria Federal Savings And Loan Association). Face amount at recording — it may have since been paid down, refinanced or satisfied. View the recorded document.

Ten-year activity

Show as table

Year	Construction	Enforcement	Housing & tenants	Health & systems	Total
2017	0	0	2	10	12
2018	0	0	3	13	16
2019	5	1	9	4	19
2020	0	0	23	3	26
2021	0	0	9	2	11
2022	0	3	13	6	22
2023	0	0	10	9	19
2024	0	4	14	15	33
2025	0	1	13	3	17
2026	0	1	5	10	16

The last 12 months — 24 records

The full timeline

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