Building report

670 Union Street · Brooklyn · BBL 3009557507 · generated 2026-10-20 · FREE Print / save PDF

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Where the penalty points come from

Open with the city right now

No current HPD flags in the latest weekly snapshot: no open violations, no pending litigation, no active vacate orders, and not in the Alternative Enforcement Program.

Patterns

No heat or hot-water complaints in the last three years.

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

What 311 hears from this address

103 service requests in the last three years. Most common: Illegal Parking (77) · Blocked Driveway (19) · Noise (3) · Non (2) · Rodent (1) · Homeless Person Assistance (1).

Filed construction activity

$205,700 in permitted construction work filed since 2016 (14 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

1 of 3 signals present. Only a partial profile — stabilization is possible but less likely. 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 6% between tax years 2025 and 2027.

For property tax, the Department of Finance values this condo as if it were a rental building. Its 2023 estimate: gross income $1,014,748 a year ($39.31 per sq ft), operating expenses $253,752 ($9.83 per sq ft), net operating income $760,997. These are the city's estimates from comparable rentals, not the building's actual budget, rents or maintenance charges.

Flood exposure

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

Hurricane evacuation zone 5 of 6 — zone 1 evacuates first.

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

No street-flooding or sewer-backup complaints on record at this address.

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

670 Union Street Copy address

103 311 service requests from this address in the last three years.

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.

The landlord's report card

Managed by MONARCH REALTY GROUP — 33 buildings, 915 units. Grades across the portfolio: A30 · B2 · D1. See the whole portfolio

Sales, deeds & mortgages

Ten-year activity

Show as table

Year	Construction	Enforcement	Housing & tenants	Ownership & money	Health & systems	Total
2017	0	0	0	1	4	5
2018	6	0	0	0	0	6
2019	12	0	0	0	4	16
2020	16	2	0	0	0	18
2021	18	16	0	0	2	36
2022	6	13	0	140	1	160
2023	3	5	62	9	0	79
2024	0	0	46	8	0	54
2025	0	0	33	7	0	40
2026	0	0	21	22	1	44

The last 12 months — 53 records

The full timeline

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