364 Union Street
364 Union Street, between Smith and Hoyt streets, Carroll Gardens, Brooklyn
BBL 3004367502 · BIN 3007281
- Landmark
- No
- Amenities
- Video intercom and storage
Every recorded sale at this building, 2012–2025
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf
- $1,605
- Listing discount
- -0.8%
- Recorded sales
- 10
- On record
- 2012–2025
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About the building
364 Union Street is a brownstone condominium converted by East River Partners during 2013–14. The company renovated the existing multifamily building into five homes, retaining its bay-fronted street presence. The Attorney General accepted the condominium filing in August 2013. A final certificate of occupancy followed in January 2015, after the initial sales had closed.
The building contains four three-bedroom floor-throughs above a larger garden duplex. The upper apartments have approximately 1,371 square feet, while the duplex extends to roughly 2,200 square feet across two levels and opens to private outdoor space. Bay windows widen the front living rooms and bring light into the dining areas. Decorative fireplaces remain within the renovated interiors. The ground-level home has a different circulation pattern from the single-level apartments above, with an internal stair connecting its living areas.
Recent sales
Recent closings at this building, curated by The Roebling Team research desk. Prices are the transfer amounts recorded with the NYC Department of Finance; apartment-level detail is checked against the building’s own file in The Roebling Research Library before publishing.
| Date | Unit | Apartment | Price | PPSF | vs. Ask |
|---|---|---|---|---|---|
| Dec 5, 2025 | 2 | 3 BR · 2 BA · 1,371 sf | $2,200,000 | $1,605/sf | -10.2% |
| Mar 17, 2021 | 2 | 3 BR · 2 BA · 1,371 sf | $1,900,000 | $1,386/sf | -2.6% |
| Apr 16, 2019 | 1 | 2 BR · 3 BA · 2,204 sf | $2,400,000 | $1,089/sf | -4.0% |
| Aug 4, 2014 | 3 | 3 BR · 1,371 sf | $1,731,025 | $1,263/sf | +12.0% |
| May 5, 2014 | 5 | 3 BR · 1,371 sf | $1,654,656 | $1,207/sf | +5.7% |
| Apr 30, 2014 | 4 | 3 BR · 1,371 sf | $1,756,481 | $1,281/sf | +12.2% |
| Mar 28, 2014 | 2 | 3 BR · 1,371 sf | $1,550,000 | $1,131/sf | +1.6% |
| Mar 21, 2014 | 1 | 2 BR · 2,204 sf | $2,226,278 | $1,010/sf | off-mkt |
Market read. Most recent trades (2025) cleared a median $1,605/sf across 1 sale. Median listing discount -0.8% over ask.
The retrade record
Lines that have traded more than once in the public record — the building’s appreciation arc, apartment by apartment.
Full closing history with price-per-square-foot over time, the complete retrade record, and every line that has traded.
Sales sourced from NYC Department of Finance recorded transfers (BBL 3-00436-7502) and verified listing data. Apartment-level facts (line, condition, asking-price context) curated and cross-verified by The Roebling Team research desk. Not all transactions cross-verify with ACRIS records — sponsor and LLC purchases sometimes record at stipulated values rather than market price; square footage from recorded condo declarations and offering plans.
Comparable buildings
- 358 Court Street — A nearby historic condominium with a larger collection of residences.
- The Landmark at Strong — A former church conversion for buyers considering historic condominium architecture.
- 25 Bergen Street — A prewar condominium with a somewhat larger ownership group.
- The Mill — A nearby commercial-building conversion with broader loft layouts and a much larger association.
More Carroll Gardens buildings
- 351 Union Street — 1920 condominium
- 358 Court Street — 1851 condominium
- 361 Clinton Street — 1987 condop
- 370 Union Street, 370–372 Union Street · Carroll Gardens — 1910 condominium
- 391 Clinton Street — 1909 co-op
- 406 Degraw Street — 1899 condominium
The neighborhood
For the full neighborhood — its buildings, character, and market — read The Roebling Team Guide to Carroll Gardens.
How to read the facts on this page. Items attributed to an offering plan describe the building as it was offered at that filing — unit mix, square footage, the amenity program as planned. They are not a statement about how the building operates today. Tax and compliance figures are sourced separately to current City records and carry their own dates. House rules, staffing and fee policy can change by board resolution without any public filing: treat every policy line here as a starting point for diligence and confirm it with the managing agent. Where this page compares one building or neighborhood to another, that is our analysis of the recorded record — it names the measure, the period and the sample it rests on, and it is an observation about medians rather than a prediction about any particular apartment.
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