185 Ainslie Street
185 Ainslie Street, Brooklyn, NY 11211
Williamsburg, Brooklyn
BBL 3027697502 · BIN 3069031
- Year built
- 1901
- Type
- Condominium
- Landmark
- Landmark or historic district
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 185 Ainslie Street 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.
185 Ainslie Street is a four-residence condominium on a 25-foot-wide lot in East Williamsburg. The sponsor took a three-story building with a basement and cellar, which PLUTO dates to 1901, and enlarged it to four stories plus a penthouse level. Every home has private outdoor space, per listing records.
The building sold out in under three months once closings began. ACRIS records four sponsor deeds from October 23, 2025 to January 12, 2026, totaling $9,443,800, which is $98,800 above the plan's offering total. Prices ran from $2.2 million to $2.49 million, or about $1,150 to $1,615 per square foot depending on how much lower-level space a home includes.
For a buyer, that gives a recorded price range for boutique conversions with outdoor space at around $1,500 to $1,600 per square foot on the main floors.
Architecture and residences
Department of Buildings records show interior demolition and roof repairs permitted in June 2022, foundation and structural permits in December 2022, and the main job, filed as "converting existing 3 story with basement and cellar building to a 4 story with cellar and penthouse building," first permitted in February 2023. The city classifies it as a new building with existing elements to remain. An initial certificate of occupancy for four dwelling units issued November 14, 2025, and the final one on January 30, 2026.
PLUTO gives a 25-by-115-foot lot in an R6B district and 6,742 square feet of floor area, a figure that predates the enlargement.
Listing records describe the four homes this way:
- Residence 1: two bedrooms and three baths across 2,169 square feet, the largest home, which suggests a duplex using the lower level
- Residence 2: a three-bedroom, two-bath floor-through of 1,364 square feet with a 24-by-31-foot private garden and an outdoor kitchen
- Penthouse 1: three bedrooms across 1,555 square feet
- Penthouse 2: three bedrooms and three and a half baths across 1,583 square feet
Listing records also mention central heating and cooling, in-unit washers and dryers, and a home described as a triplex with a private roof terrace; that label does not match the unit names recorded in ACRIS, so read Schedule A for the layouts.
Offering and pricing
Per the offering plan filed with the New York State Attorney General (plan CD240290), the plan was submitted October 7, 2024, accepted February 26, 2025 and declared effective May 12, 2025, with 185 Ainslie St Realty LLC as sponsor and four residential units. The total offering price rose from $9,270,000 to $9,345,000, an increase of $75,000, an average of $2,336,250 per home. The record still lists one unit sold. The amendment text was not re-read for this page.
Listing records show asks of $2,550,000 for Residence 1, $2,200,000 for Residence 2 and $2,450,000 for Penthouse 1. Residence 2 went into contract in March 2025, which fits the plan being declared effective in May.
Recorded sales
| Residence | Layout | Size | Price | $/sf | Deed dated |
|---|---|---|---|---|---|
| 2 | 3 bed, 2 bath | 1,364 sf | $2,200,000 | $1,613 | October 23, 2025 |
| PH2 | 3 bed, 3.5 bath | 1,583 sf | $2,443,800 | $1,544 | October 24, 2025 |
| 1 | 2 bed, 3 bath | 2,169 sf | $2,490,000 | $1,148 | November 5, 2025 |
| PH1 | 3 bed | 1,555 sf | $2,310,000 | $1,486 | January 12, 2026 |
Sizes are from listing records. Residence 1 sold for $60,000 below its last ask and Penthouse 1 for $140,000 below. A 2025 listing record for Residence 2 shows common charges of $402 a month and real estate taxes of $5,004 a year; Penthouse 2 shows $439 a month in common charges. Unit-level transaction history is maintained in The Roebling Research Library and shared with clients during diligence.
Local Law 97
This building is below the 25,000 sq ft threshold at which LL97 limits apply to a building on its own. It is still covered if it shares a tax lot or condominium board with buildings totaling over 50,000 sq ft; confirm on DOB’s covered-buildings list.
See full Local Law 97 analysis →Recent sales
Recent closings at this building, from The Roebling Research Library. 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 |
|---|---|---|---|---|---|
| Jan 12, 2026 | PH1Sponsor Sale | 3 BR · 2.5 BA · 1,555 sf | $2,310,000 | $1,486/sf | — |
| Nov 5, 2025 | 1Sponsor Sale | 2 BR · 2.5 BA · 2,169 sf | $2,490,000 | $1,148/sf | -2.4% |
| Oct 24, 2025 | PH2Sponsor Sale | 3 BR · 2.5 BA · 1,583 sf | $2,443,800 | $1,544/sf | -0.3% |
| Oct 23, 2025 | 2Sponsor Sale | 3 BR · 2 BA · 1,364 sf | $2,200,000 | $1,613/sf | +0.0% |
Market read. Most recent trades (2026 to date) cleared a median $1,486/sf (recorded) across 1 sale.
Sales sourced from NYC Department of Finance recorded transfers (BBL 3-02769-7502; each condominium apartment is its own tax lot). Apartment-level facts (line, condition, asking-price context) curated and cross-verified in The Roebling Research Library. 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.
What would your apartment rent for?
Enter your apartment and I'll send you what it would rent for, from comparable closed leases at 185 Ainslie Street and nearby.
At the recent median sale of $2.38M (4 sales in the past 24 months, since October 31, 2024), a buyer putting 25% down would pay about $98,831 to close, or 4.2% of the price.
- Mansion tax: $29,711
- Mortgage recording tax: $34,316
- Title insurance: $10,696
- Attorneys, lender, building fees, reserves and filings: $24,107
Assumes a resale (the seller pays transfer taxes), a $4,500 attorney fee and a mortgage on the rest.
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What to know if you’re buying
Every home is a resale now. The sponsor sold out in January 2026. Use the recorded deeds, not the old asks, as the baseline.
Price per square foot depends on the lower level. Residence 1's figure of about $1,150 per square foot reflects lower-level area. Compare main-floor homes with main-floor homes.
Certificate of occupancy. The final certificate issued January 30, 2026, so the temporary-CO question that hangs over most new condominiums is settled here.
A four-unit association. There is no staff. Owners share decisions on the roof, facade and systems directly, so ask about reserves and the first-year budget.
Closing costs. In a resale the buyer pays the state mansion tax of 1% at $1 million and above, plus title and recording costs. Use the calculators below to run your price.
Comparable buildings
If you're considering 185 Ainslie Street, also look at these small Williamsburg condominiums:
- 167 Devoe Street — six residences made by converting and enlarging a 1901 building
- 145 Conselyea Street — three-residence East Williamsburg new building with a garden home and a triplex penthouse
- 144 Middleton Street — four-home condominium with an expired 421-a benefit
- 109 Devoe Street — eight residences with 2026 sponsor closings from $1.88 million to $2.795 million
- 100 Scholes Street — eight-residence East Williamsburg new building in sponsor sales in 2026
- 185 Skillman Avenue — eight-residence condominium near the Graham Avenue L
More Williamsburg buildings
- 179 Richardson Street, 179 Richardson Street · Williamsburg — condominium
- 180 South 4th Street, Brooklyn — condominium
- 181 Jackson Street — 2023 condominium
- 185 Skillman Avenue — condominium
- 185 Withers Street — 1899 condominium
- 189 Wallabout Street (Lee Gardens), 189 Wallabout Street · Williamsburg — 1998 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 185 Ainslie Street?
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646.939.7375 · c.cohen@compass.com