The Shocking Transformation Of 65 4th Ave Brooklyn NY: 7 Essential Facts About The New 10-Story Tower
The address 65 4th Ave in Brooklyn, NY, is no longer associated with the quiet, pre-war structure it once was. As of late 2025, this location marks a major milestone in the ongoing transformation of the 4th Avenue corridor, sitting right on the dynamic border of Park Slope and Boerum Hill. The site has been completely redeveloped, replacing a low-rise, mixed-use building with a sleek, 10-story luxury rental development that is now actively leasing and significantly reshaping the local streetscape.
This new mixed-use building represents a fresh wave of New York City real estate, combining modern residential living with a dedicated commercial presence. It stands as a testament to Brooklyn’s relentless growth, offering a blend of high-end amenities and unparalleled transit access near the Atlantic Avenue–Barclays Center hub. For residents and real estate watchers alike, 65 4th Avenue is one of the most talked-about new developments in the area.
The 65 4th Avenue Development: Project Profile and Key Entities
The story of 65 4th Avenue is one of dramatic urban renewal. The original structure, a modest four-story, five-unit building dating back to 1920, was demolished to make way for a much taller, denser, and more modern development. This transition reflects the broader trend along 4th Avenue, which is increasingly becoming a corridor for mid-to-high-rise residential towers designed to accommodate Brooklyn’s booming population. The new structure is a major anchor point in the area, contributing significantly to the neighborhood’s housing stock.
The project, which wrapped up construction in 2024, is now fully operational and leasing units. It is a key piece of the Park Slope/Boerum Hill real estate puzzle, providing a contemporary rental option in a neighborhood known for its classic brownstones and vibrant atmosphere. The building's design emphasizes clean lines and modern functionality, typical of the new construction found across the borough.
- Address: 65 4th Avenue, Brooklyn, NY 11217
- Neighborhood: Park Slope / Boerum Hill Border
- Building Type: Mixed-Use (Residential and Retail)
- Height: 10 Stories (Approximately 100 feet tall)
- Total Units: 30 Rental Apartments
- Total Square Footage: 25,458 square feet
- Developer: Yisroel Greenfeld (Brooklyn-based)
- Architect: MHM Engineering PC (Mohamed Mabrouk)
- Year Built (New Structure): 2024
- Assessed Market Value: $5,656,000 (Current Tax Assessor’s Value)
7 Essential Facts About the New 65 4th Ave Tower
The new development at 65 4th Avenue is more than just a place to live; it is a vital piece of infrastructure for the area. Here are the most critical, up-to-date facts about the building that define its role in the Brooklyn real estate market and its appeal to new residents.
1. It Replaced a Century-Old Pre-War Building
The site’s history is a microcosm of Brooklyn’s development. For decades, 65 4th Avenue was a four-story structure built in 1920, housing only five units. The decision to replace this modest building with a 10-story tower highlights the increasing pressure for density and modern housing along major transit corridors. This dramatic change from low-rise pre-war to high-rise contemporary development is a powerful visual marker of the neighborhood's evolution. Real estate investors see the 4th Avenue corridor as a prime location for new construction due to its commercial zoning and proximity to major transit lines.
2. The Ground Floor is Anchored by a Major Fitness Center
One of the most significant and recent developments is the confirmation of the ground-floor retail tenant. Oak Fitness Inc has secured a substantial 60-year lease for a 1,400-square-foot commercial space at the address. This is a huge amenity for the building's residents and the surrounding community. Oak Fitness is a high-end gym specializing in personal training, further elevating the luxury status of the mixed-use building. The long-term lease commitment by a fitness entity like Oak Fitness underscores the commercial viability and foot traffic potential of this Boerum Hill/Park Slope location.
3. Units are Exclusively Rental Apartments
Unlike many new Brooklyn developments that offer condos, the 30 units at 65 4th Avenue are structured as rental apartments. This is a critical distinction for the local housing market, providing much-needed rental inventory. The units range from studios to larger layouts, with current listings showing studios starting around the high $2,000s per month. The rental focus makes the building an attractive option for professionals and young families looking for modern construction without the long-term commitment of ownership in the competitive Park Slope market.
4. The Building Features In-House Residential Amenities
As a modern luxury rental building, 65 4th Avenue provides several key amenities designed for convenience and comfort. The most notable features confirmed by listing data include an elevator and an in-house fitness center. While a full list of amenities has not been widely publicized, the inclusion of a dedicated gym space, separate from the ground-floor retail gym, is a major draw for prospective tenants. Other common amenities in similar buildings often include a package room, a resident lounge, and a rooftop terrace, which are highly anticipated features.
5. Its Location is a Transit Mecca
The building's location is arguably its strongest asset. Situated just blocks from the Atlantic Avenue–Barclays Center transit hub, residents have access to nearly every major subway line in Brooklyn, including the 2, 3, 4, 5, B, D, N, Q, and R trains. This unparalleled access makes the building a premier spot for commuters working in Manhattan or other parts of Brooklyn. The proximity to Barclays Center also means residents are steps away from major entertainment, dining, and shopping options, including the bustling retail on Atlantic Avenue.
6. Designed by MHM Engineering PC, a Prolific Brooklyn Firm
The architectural vision for the 10-story tower was provided by MHM Engineering PC, with Mohamed Mabrouk listed as the architect of record. MHM is a firm well-known for its work on other multi-family and mixed-use projects across Brooklyn and Queens. Their involvement ensures the building adheres to modern zoning regulations while maximizing the usable space and aesthetic appeal of the structure. The design is contemporary, contrasting sharply with the historic architecture of the surrounding Park Slope brownstones.
7. It is a Key Example of the 4th Avenue Corridor's Future
The 4th Avenue corridor in Brooklyn has been a hotbed for development over the last decade. Projects like 65 4th Avenue are instrumental in transitioning the street from a primarily vehicular thoroughfare into a vibrant, high-density residential avenue. This new building, along with others nearby, contributes to the topical authority of the area as a major hub for new luxury rentals, driving up local real estate values and attracting a new demographic of residents to the area. Its success is a bellwether for future development projects in the surrounding neighborhoods, including Downtown Brooklyn and Gowanus.
The Neighborhood Context: Park Slope Meets Boerum Hill
The location of 65 4th Avenue sits right in the confluence of two highly desirable Brooklyn neighborhoods: Park Slope and Boerum Hill. This geographic advantage offers residents the best of both worlds. To the east is Park Slope, known for its tree-lined streets, historic brownstones, and Prospect Park. To the west is Boerum Hill, famous for its boutique shopping, trendy restaurants, and a more bohemian, artsy atmosphere.
The immediate vicinity is highly walkable, providing easy access to local amenities, including numerous cafes, grocery stores, and specialty shops. The presence of the new Oak Fitness on the ground floor further solidifies the building's integration into the local commerce scene. For those interested in Brooklyn real estate, this mixed-use development is a prime example of how developers are capitalizing on highly convenient, transit-oriented locations to deliver modern, in-demand housing options.
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