Timber House (670 Union Street)Recorded sales & closing prices
670 Union Street, Brooklyn, NY 11215
19 recorded closings, 2017–2026. Sortable and searchable below.
- Recorded closings
- 19
- Date range
- 2017–2026
- Median $/sf
- $1,852
- Listing discount
- -1.8%
- Monthly carry/sf
- $1.36
- Price range
- $101K – $3.85M
Change in the building’s median $/sf over each window, adjusted to a floor-adjusted basis — standardized to the building’s average floor, so it reflects price rather than which floors happened to sell. (2022 marks the rate-shock inflection.) Like-for-like repeat-sale figures to follow.
Timber House trades on scarcity of type rather than on scale or service. It prices in dollars per square foot against the Park Slope and Gowanus-edge boutique new-development tier — Fourth Avenue's newer condominiums, the smaller Carroll Gardens and Gowanus buildings of the same era — but with a design premium that has no local substitute, and without the amenity depth or staffing of the larger Fourth Avenue product.
Three things drive the number. Ceiling height and light: eleven-foot ceilings with exposed structure and triple-glazed windows in a fourteen-unit building are not something a buyer can find elsewhere in the immediate market. Outdoor and parking: a deeded space with charging is a real asset on this side of Park Slope and should be priced as one. And the operating case: a genuinely all-electric, solar-supplemented, Passive House–principled building should be presented with its actual utility history, because that is what converts a design story into a number. Indexed to 2025, the last complete year, the honest framing is a premium small-building product in a market where most comparable-priced inventory is either larger and more serviced or older and less efficient. Unit-level transaction history is maintained in The Roebling Research Library and shared with clients during diligence.
The complete recorded-sale history for Timber House, compiled from NYC Department of Finance transfer records and verified listing data, then enriched apartment-by-apartment by The Roebling Team research desk.
Price per square foot over time
19 sales with a known square footage, by closing date.
The vertical premium
The climb in price per square foot as you rise through the building — light and views included, time-adjusted to today’s market.
Premium by line
What each line’s exposure is worth — its light, outlook, and orientation — measured against the building’s average sale.
Recent closings
The building’s 10 most recent market sales.
| Date | Unit | Apartment | Price | $/sf | vs. Ask |
|---|---|---|---|---|---|
| Apr 17, 2026 | 4A | 3 BR · 3.5 BA · 2,041 sf | $3,850,000 | $1,886 | +0.0% |
| Jan 8, 2026 | 3A | 2 BR · 2 BA · 1,395 sf | $2,425,000 | $1,738 | +5.4% |
| Jan 10, 2023 | 5B | 1 BR · 1 BA · 622 sf | $1,013,158 | $1,629 | +1.8% |
| Dec 12, 2022 | 4A | 3 BR · 3.5 BA · 2,041 sf | $3,215,362 | $1,575 | +0.5% |
| Nov 22, 2022 | P2 | 153 sf | $111,540 | $729 | — |
| Nov 21, 2022 | 6B | 3 BR · 2.5 BA · 1,948 sf | $3,516,483 | $1,805 | +2.1% |
| Nov 21, 2022 | 4B | 3 BR · 2.5 BA · 1,839 sf | $3,128,598 | $1,701 | +7.9% |
| Nov 17, 2022 | 3C | 3 BR · 2 BA · 1,839 sf | $3,182,681 | $1,731 | +14.1% |
| Nov 17, 2022 | 3B | 1 BR · 1 BA · 683 sf | $1,181,170 | $1,729 | +18.7% |
| Nov 17, 2022 | 3A | 2 BR · 2 BA · 1,395 sf | $2,173,963 | $1,558 | +9.0% |
The retrade record
Lines that have changed hands more than once in the public record — the building’s appreciation arc, apartment by apartment.
Every recorded sale
Sort any column; filter by unit or keyword. Prices are the recorded transfer amount at the NYC Department of Finance. Every sale sits in one of three states: counted in the building’s medians and trend; shown but excluded as a non-arms-length or nominal transfer; or shown and ⚑ flagged for review — a possible duplicate filing or an extreme $/sf outlier, held out of the statistics pending manual verification rather than allowed to move them.
| Apartment | ||||||
|---|---|---|---|---|---|---|
| Apr 17, 2026 | 4A | 3 BR · 3.5 BA | 2,041 | $3,850,000 | $1,886 | +0.0% |
| Jan 8, 2026 | 3A | 2 BR · 2 BA | 1,395 | $2,425,000 | $1,738 | +5.4% |
| Jan 10, 2023 | 5BSponsor Sale | 1 BR · 1 BA | 622 | $1,013,158 | $1,629 | +1.8% |
| Dec 12, 2022 | 4ASponsor Sale | 3 BR · 3.5 BA | 2,041 | $3,215,362 | $1,575 | +0.5% |
| Nov 22, 2022 | P2Sponsor Sale | 153 | $111,540 | $729 | — | |
| Nov 21, 2022 | 6BSponsor Sale | 3 BR · 2.5 BA | 1,948 | $3,516,483 | $1,805 | +2.1% |
| Nov 21, 2022 | 4BSponsor Sale | 3 BR · 2.5 BA | 1,839 | $3,128,598 | $1,701 | +7.9% |
| Nov 17, 2022 | 3CSponsor Sale | 3 BR · 2 BA | 1,839 | $3,182,681 | $1,731 | +14.1% |
| Nov 17, 2022 | 3BSponsor Sale | 1 BR · 1 BA | 683 | $1,181,170 | $1,729 | +18.7% |
| Nov 17, 2022 | 3ASponsor Sale | 2 BR · 2 BA | 1,395 | $2,173,963 | $1,558 | +9.0% |
| Nov 16, 2022 | 1BSponsor Sale | 1 BA | 526 | $661,862 | $1,258 | +1.8% |
| Nov 16, 2022 | 2BSponsor Sale | 3 BR · 3 BA | 2,376 | $3,623,662 | $1,525 | -2.5% |
| Nov 10, 2022 | 5ASponsor Sale | 2 BR · 2 BA | 1,416 | $2,311,427 | $1,632 | -0.6% |
| Nov 3, 2022 | P4Sponsor Sale | 153 | $101,400 | $663 | — | |
| Nov 2, 2022 | 2ASponsor Sale | 3 BR · 3 BA | 1,854 | $2,947,833 | $1,590 | +1.8% |
| Oct 28, 2022 | 5CSponsor Sale | 3 BR · 2.5 BA | 1,840 | $3,132,162 | $1,702 | +1.0% |
| Oct 28, 2022 | 6ASponsor Sale | 2 BR · 2.5 BA | 1,737 | $3,066,488 | $1,765 | +5.7% |
| Oct 25, 2022 | 1ASponsor Sale | 1 BA | 462 | $590,000 | $1,277 | -0.8% |
| Nov 27, 2017 | —Sponsor Sale | 4 BR | 1,580 | $1,832,850 | $1,160 | — |
Sources, exclusions and how these figures are computed
Sales sourced from NYC Department of Finance recorded transfers (BBL 3-00955-7507) 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. Storage, parking, and commercial units are excluded from all figures. Floor- and line-level $/sf are time-controlled (each sale measured against the building’s going rate at the time of sale) and expressed at today’s pricing, so they isolate the floor or line premium rather than blend two decades of market movement.
Put this data to work.
Know what’s fair before you offer — we’ll show you where each line trades, the building’s discount-to-ask pattern, and where the value sits right now.
Price to the building’s real trajectory, not a guess — we’ll position your line against its true comps to maximize the outcome.