- Year built
- 1910
- Type
- Condominium
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 300 5th 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.
300 5th Street is a four-residence condominium made from a 1910 house on Fifth Street, between Fourth and Fifth Avenues in the northwest corner of Park Slope. The sponsor took a three-story, two-family building and enlarged it vertically and horizontally into a four-story, four-family building, 40 feet tall, under a new certificate of occupancy filing.
The offering plan totals $7,950,000, or about $1.99 million per home on average. Three of the four homes are two-bedroom apartments of roughly 900 to 950 square feet; the fourth is a garden duplex of about 1,700 square feet. At published asks the floor-through apartments price near $1,900 to $2,040 per square foot, high for a small conversion on this stretch of Park Slope.
The first sponsor deed was recorded in June 2026, so the building already has one closed price to check asks against.
Architecture and residences
The Department of Buildings job (B01094512) was filed in October 2024 and permitted in January 2025. It describes a horizontal and vertical enlargement of a three-story building to a four-story, four-family dwelling with about 4,000 square feet of construction floor area. Separate filings cover excavation support and structural steel for the extension (both signed off), plumbing (signed off March 2026), new heating, cooling and exhaust systems (signed off June 2026), and a new water service and backflow preventer for a sprinkler system, permitted in September 2026. An earlier cosmetic renovation filing for the three-family house was withdrawn.
As of October 30, 2026, the main alteration job (B01094512-I1) still showed "Permit Entire" status, not sign-off. Neither the Department of Buildings' DOB NOW nor its older certificate of occupancy records list a certificate, temporary or final, for this building. The sprinkler water-service permit was issued in September 2026, three months after the first closing. Ask what certificate the June 2026 closing relied on.
Listing records describe the four homes this way:
| Home | Layout | Size | Ask | Ask per sq ft | Status (listing records) |
|---|---|---|---|---|---|
| Garden (duplex) | 2 bed, 2.5 bath | about 1,701 sq ft | $2,450,000 | about $1,440 | Listed February 3, 2026 |
| 2 | 2 bed, 2 bath | 950 sq ft | $1,795,000 | about $1,889 | Closed June 2026 (deed below) |
| 3 | 2 bed, 2 bath | 948 sq ft | $1,850,000 | about $1,951 | Listed January 2026; current status not confirmed |
| PH | 2 bed, 2 bath | 908 sq ft | $1,850,000 | about $2,037 | Pending, per a listing record updated late October 2026 |
The four asks total $7,945,000, within $5,000 of the plan's current total. The listing records for both Unit 3 and the PH describe private roof-deck access, so the roof appears to be divided between the two top homes; the plan's floor plans should confirm it. The garden duplex lists common charges of $635 a month and real estate taxes of $544 a month; listing summaries put the upper-floor homes at about $467 to $480 a month in common charges. ACRIS numbers the units 1 through 4; we read Garden as Unit 1 and PH as Unit 4, but the plan's Schedule A should confirm it.
Offering and pricing
Per the offering plan filed with the New York State Attorney General (plan CD250145), the plan was submitted April 30, 2025 and accepted November 17, 2025, with 300 PS LLC as sponsor. It covers four residential units. The initial offering price was $7,800,000; the current total is $7,950,000, so at least one amendment raised prices by $150,000. The database shows no effective date and no units sold. We could not open the amendment record, so the amendments were not reviewed.
A recorded sponsor deed normally means the plan has been declared effective. The database may not have caught up; confirm effectiveness in the amendments.
Recorded sales
ACRIS shows the condominium declaration recorded March 5, 2026, and one deed so far:
- Unit 2: $1,827,758.75, deed dated June 5, 2026, recorded June 24, 2026
Backing out a 1.825% gross-up for the transfer taxes the sponsor would ordinarily pay gives $1,795,000, exactly the listed ask. That is our arithmetic, not a recorded figure. One listing record reports a lower closing price for Unit 2; the deed controls. Unit-level transaction history is maintained in The Roebling Research Library and shared with clients during diligence.
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 |
|---|---|---|---|---|---|
| Jun 5, 2026 | 2 | 2 BR · 2 BA · 948 sf | $1,827,758 | $1,928/sf | +1.8% |
Market read. Most recent trades (2026 to date) cleared a median $1,928/sf (recorded) across 1 sale.
Sales sourced from NYC Department of Finance recorded transfers (BBL 3-00987-7502; 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.
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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
Read the amendments. The price has moved once, and the database does not show the plan's effective date. Both belong in your attorney's review.
Price per square foot. At about $1,950 to $2,040 per square foot, the two upper-floor asks sit well above the garden duplex. Compare them with recorded new-construction and conversion sales in north Park Slope, not with the plan total.
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 state mansion tax of 1% at $1 million and above. On a $1.85 million home that is about $33,800 in transfer taxes and $18,500 in mansion tax. Use the calculators below to run your price.
Certificate of occupancy. We found no sign-off on the main alteration job. Ask for the current certificate, temporary or final, and what work remains.
Carrying costs. The plan's budget sets common charges and projected taxes. No tax abatement has been confirmed in this review.
Comparable buildings
- 373 3rd Street — 1920 Park Slope house being enlarged into four condominiums, plan submitted August 2026
- 408 3rd Street — 1920 building renovated into four three-bedroom condominiums, sold out in 2022–23
- 34 Garfield Place — two-story Park Slope building enlarged into four condominiums, sold out in 2026
- 18 Eighth Avenue — four-residence Park Slope condominium
- 160 12th Street — seven-residence elevator building across Fourth Avenue in Gowanus
- 270 5th Street — the Milk Factory loft cooperative at the Fourth Avenue end of the same block
More Park Slope buildings
- 292 Garfield Place — 1891 co-op
- 295 Sixth Avenue, 295 Sixth Avenue · Park Slope — co-op
- 299 13th Street — 1920 co-op
- 300 8th Avenue, 300 Eighth Avenue — 1920 co-op
- 301 Fifth Avenue — 1920 co-op
- 303 Sixth Avenue — 1920 co-op
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 300 5th Street?
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646.939.7375 · c.cohen@compass.com