526 Union Avenue
526 Union Avenue, Brooklyn, NY 11211
BBL 3027417502 · BIN 3068238
- Year built
- 2023
- Type
- Condominium
- Units
- 44
- Floors
- 7
- Landmark
- No
- Amenities
- A second-floor exercise room, per the amended certificate of occupancy, plus the on-site parking and storage units. Anything beyond that is not documented in the records reviewed
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 526 Union Avenue would likely sell for today, what it costs to sell, and what you’d walk away with — reviewed personally against condition, exposures, renovation quality, and the competition actually on the market.
526 Union Avenue belongs to the latest generation of Williamsburg condominiums: permitted just before the pandemic, completed in 2023 and sold out in two years. The public record is complete on the three questions that matter most for a building this new: whether it really sold, how many apartments it has, and what the owners pay in taxes.
It sold, to separate buyers. Northside NY Capital LLC closed its first apartments in March 2023. Most closings were recorded that year, a handful more in 2024, and the last sponsor apartment closed in February 2025. All 44 residences went to separate buyers — individuals, trusts and single-purpose LLCs — and many took a parking space or storage unit with the apartment. The sponsor holds no residential inventory. On the fiscal 2027 roll it still owns 7 of the 23 parking spaces, and nothing else. This is a for-sale condominium in fact, not a rental building held in a condominium wrapper.
It has 44 apartments, not 75. The 75 lots include 23 parking spaces and 8 storage units, each separately deeded. City data that reports 75 units is counting lots.
It pays full taxes. Many Brooklyn condominiums of this generation carry a 421-a benefit, including the 421-a(16) homeownership option, which applied outside Manhattan. This building has none. That is the central carrying-cost fact, and it is covered below.
Architecture and unit composition
A seven-story building on a 100-by-100-foot lot. The new-building application records about 35,900 square feet of zoning floor area. Residences occupy floors two through seven; the parking and storage units are within the building. The layout steps down at the top: six units on the second floor, eight on each of floors three through six, and six penthouse units on the seventh.
The mix leans compact. On the Department of Finance roll the smallest residences (the 01 and 04 lines on floors three through six) are about 412 to 450 square feet, most of the rest run about 600 to 980, and the largest are about 1,144: unit 205 and the 07 line on floors three through six. The penthouses run from about 607 to about 1,061 square feet. Bedroom counts, exposures and outdoor space are not documented in the records reviewed and should be read from the floor plans.
A zoning note worth checking. The recorded zoning floor area works out to a floor area ratio of about 3.6 on the lot. PLUTO lists a residential maximum of 3.0 for the district. In this part of the 2005 rezoning area, floor area above the base is generally earned through the Inclusionary Housing program. HPD's affordable-housing production records show no affordable units at this address, and there is none inside the condominium regime: all 44 residences sold on the open market. How the additional floor area was generated is not documented in the records reviewed. The offering plan's zoning disclosure is where to confirm it.
Building operations
There is no real-estate tax exemption on any lot in this condominium. The Department of Finance exemption file shows no 421-a, 421-a(16) or other benefit on lots 1101–1175 or the billing lot on any roll from fiscal 2021 through fiscal 2027. The neighboring condominium at 538 Union Avenue, on the same block, does carry a 421-a benefit, so a buyer comparing the two should compare tax bills, not asking prices. Owners here have paid full Class 2 taxes from their first bill.
At the fiscal 2027 assessments and a Class 2 rate of roughly 12.5 percent, that works out to about $7,000 a year for the smallest residences and about $21,000 to $24,000 for the largest. That is our estimate from the roll, not a bill. Assessments on new condominiums tend to rise as resales establish values. Check the current bill for the specific unit.
Parking and storage are separately deeded lots with their own small tax bills. The sponsor's seven remaining parking spaces are its only remaining stake in the building. Board composition and the date control passed to purchasers are not documented in the records reviewed; ask the managing agent.
Recent sales
Every closing through February 2025 was a first sale from the sponsor. Resale activity has only just begun, and the building now trades as ordinary resale inventory with no sponsor apartments competing. Within northern Williamsburg's post-2018 condominium supply, pricing here turns on unit size and floor, whether a parking space conveys, and the full-tax position. Against abated buildings of the 2008–2016 cohort nearby, this building's taxes are higher. Against other full-tax new construction, they are comparable. Unit-level transaction history is maintained in The Roebling Research Library and shared with clients during diligence.
The retrade record
Lines that have traded more than once in the public record — the building’s appreciation arc, apartment by apartment.
Recent closings at this building, sourced from NYC Department of Finance records. Apartment-level detail (line, condition, asking-price context) verified upon consultation request.
| Date | Unit | Price |
|---|---|---|
| Dec 19, 2025 | 508 | $1,465,000 |
| Mar 12, 2025 | S1 | $1,706,587 |
| May 29, 2024 | P18 | $1,888,853.75 |
| Apr 29, 2024 | S6 | $1,746,298.75 |
| Apr 26, 2024 | PH1 | $1,792,120 |
| Mar 29, 2024 | 201 | $1,675,021.25 |
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 3-02741-7502) 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.
Buying here? Condo closing costs with a mortgage typically run 3 to 6% of the price. See NYC co-op and condo closing costs, line by line.
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What to know if you’re buying
Underwrite full taxes from day one. There is no abatement to burn off. The number is higher than at abated buildings nearby, but there is no step-up waiting later.
Confirm what conveys. Parking spaces and storage units are separate tax lots. If one is part of the deal, it needs its own line in the contract, the title report and the transfer tax filing. The sponsor still holds seven spaces and may sell them directly.
Ask for the documents that aren't public. No offering plan was located. Pets, leasing and short-term-rental rules, any working-capital contribution, the current budget and reserves all have to come from the managing agent and the governing documents. So does the zoning disclosure on floor area.
Check the amended certificate of occupancy. The 2024 amendment added the exercise room. Confirm that the space you are paying common charges on is the legal use.
What to know if you’re selling
Price against full-tax new construction. Buyers cross-shopping abated buildings will compare the monthly number. Lead with the tax bill rather than let a buyer find it.
Sell the parking. Twenty-three deeded spaces for 44 apartments makes parking scarce inside the building. An apartment with a space attached is a different product.
Comparable buildings
- 88 Withers Street (Element 88): a 33-residence condominium on the neighboring block, same MX-8 zoning, separately deeded parking and storage, and also sold with no abatement
- 510 Driggs Avenue: a 44-residence Northside Williamsburg condominium that sold out in 2023 and is fully taxed with no 421-a
- 147 Hope Street: a 38-residence Williamsburg condominium with underground parking and no abatement; the full-tax comparison
- 65 Eckford Street: a 2025 Greenpoint delivery with full real-estate taxes; the newest small-building contrast
- 415 Leonard Street: a seven-story condominium with separately deeded parking whose 421-a has already expired
- 280 Metropolitan Avenue: a 28-residence Williamsburg condominium with deeded parking and a capped 421-a stepping down from 2028; the abated contrast
- 14 Hope Street: a 23-residence condominium with a garage and a 25-year 421-a running into the 2030s
More Williamsburg buildings
- 49 North 8th Street (North8) — 2006 condominium
- 505–515 Flushing Avenue, 505 and 515 Flushing Avenue — 2010 condominium by Karl Fischer Architects
- 510 Driggs Avenue — 2022 condominium
- 535 Kent Avenue (525–535 Park Plaza Condominium) — 2001 condominium
- 55 Berry Street (Berry Street Lofts) — 1900 condominium by Karl Fischer Architects
- 580 Wythe Avenue (564–580 Park Plaza Condominium) — 2001 condominium
The neighborhood
For the full neighborhood — its buildings, character, and market — read The Roebling Team Guide to Williamsburg.
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.
Considering a move at 526 Union Avenue?
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