- Year built
- 2024
- Type
- Condominium
- Landmark
- No
- Amenities
- Keyed elevator, roof deck, video intercom (per listing records)
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 249 18th 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.
249 18th Street is a five-residence condominium on a 34-foot-wide lot in the South Slope, a block from the Fifth Avenue commercial strip and a short walk to the Prospect Avenue R station. Each home takes a full floor, reached by a keyed elevator.
The pricing is specific. Three listed homes ask between $1,975,000 and $2,195,000, or about $1,280 to $1,565 per square foot. The offering plan's total of $11,925,000 averages $2,385,000 per home. That leaves about $5.76 million for the two homes not yet listed, or roughly $2.88 million each. If the plan's prices hold, the unlisted homes, likely including the top floor, price well above the three on the market.
The plan has been accepted since February 2025 but is not yet effective, and ACRIS shows no recorded deeds on the five condominium lots as of October 2026.
Architecture and residences
Z Architecture PLLC filed the new building in December 2022. The first permit issued in March 2024. The filing describes a five-story, five-unit residential building of cast-in-place concrete, 55 feet tall, with about 8,800 square feet of construction floor area. The Department of Buildings signed off the job with a certificate of occupancy on September 16, 2026. A completed condominium filing creates five tax lots, one for each floor from the first to the fifth.
Listing records describe:
- Garden residence: three bedrooms, two baths, about 1,275 square feet, with a private garden of nearly 900 square feet; two bedrooms open to the garden
- Residence 2: three bedrooms, two baths, about 1,542 square feet
- Residence 4: about 1,542 square feet
Published finishes include Italian kitchen cabinetry with quartz counters, Bertazzoni and Miele appliances, zoned heating and cooling and in-unit laundry. Some listing photographs are virtually staged.
Offering and pricing
Per the offering plan filed with the New York State Attorney General (plan CD240241), 247 18 Street LLC submitted the plan August 15, 2024, and it was accepted February 27, 2025. The initial total offering price was $10,500,000. The current total is $11,925,000, an increase of $1,425,000. The amendments were not readable in the database during this review. The record shows no effective date and no units sold.
One listing record cites the offering plan as file number CD19-0179, which does not match the Attorney General's CD24-0241. Confirm the plan number with sponsor counsel.
| Residence | Layout | Size | Ask | $/sf | Monthly charges | Seen |
|---|---|---|---|---|---|---|
| Garden | 3 bed, 2 bath | 1,275 sf | $1,995,000 | $1,565 | CC $605, taxes $1,606 | October 26, 2026 record |
| 2 | 3 bed, 2 bath | 1,542 sf | $1,975,000 | $1,281 | CC $682 | June 2026 record |
| 4 | — | 1,542 sf | $2,195,000 | $1,423 | CC $695 | first listed September 28, 2026 |
These are asking prices, not contract prices. The garden listing allows financing up to 90%. Projected real estate taxes on the garden home of $1,606 a month are well above its common charges, which suggests no tax abatement in the budget; confirm in the plan.
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 →What would your apartment rent for?
Enter your apartment and I'll send you what it would rent for, from comparable closed leases at 249 18th Street and nearby.
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
The plan is accepted but not effective. The sponsor can sign contracts now. The plan becomes binding only when the sponsor declares it effective, which requires a minimum share of homes under contract. Ask how many are in contract.
Deposit. New-development contracts typically require 10% at signing, held in escrow by sponsor counsel.
Closing costs. In sponsor sales the buyer customarily pays the New York State transfer tax (0.4%) and the New York City real property transfer tax (1.425% above $500,000), plus the mansion tax of 1% between $1 million and $2 million. On a $1,995,000 purchase that is about $36,400 in transfer taxes and $19,950 in mansion tax. Use the calculators below to run your price.
Carrying costs. Common charges of about $600 to $700 a month reflect a small building with no staff listed. Taxes are the larger number. Read the plan's budget and reserve.
A five-owner condominium. The sponsor controls the board until enough homes close. With five owners, every repair and reserve decision is shared among few people.
Comparable buildings
If you're considering 249 18th Street, also look at these South Slope and Park Slope condominiums:
- 205 14th Street — five-residence South Slope conversion, sold out between November 2024 and October 2025
- 179 20th Street — Lumina, 26 residences on Fourth Avenue two blocks south
- 222 16th Street — 32-residence condominium asking about $1,400 to $1,600 per square foot
- 408 3rd Street — four three-bedroom condominiums in a renovated 1920 building
- 851 Carroll Street — five-unit brownstone condominium in the Park Slope Historic District
More Park Slope buildings
- 241 13th Street — condominium
- 243 4th Avenue (Parlour), 243 Fourth Avenue — 2018 condominium
- 248 20th Street — 1899 condominium
- 25 Montgomery Place — 1892 condominium
- 25 Plaza Street West — 1941 co-op
- 251 1st Street — 2015 condominium by Isaac & Stern Architects
The neighborhood
For the full neighborhood — its buildings, character, and market — read The Roebling Team Guide to Park Slope.
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 249 18th Street?
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646.939.7375 · c.cohen@compass.com