Solomon Schwimmer signs $5.36M contract for Longwood building set for 88-unit conversion
846 Brook Avenue aka 3144 Third Avenue (Credit - Cyclomedia)
The New York State Attorney General’s office approved a contract in which the nonprofit Boom!Community Services will sell its 33,208-square-foot, five-story building at 846 Brook Avenue, with an alternate address of 3144 Third Avenue, in Longwood, the Bronx, to Solomon Schwimmer’s 3144 3rd Avenue LLC for $5.36 million. Schwimmer filed plans this week to convert the commercial building into 88 residential units.
This Solomon Schwimmer is not the same Solomon Schwimmer who leads Twin Group Associates.
The price per foot based on the current building size is $161 per foot.
Solomon “Sol” Schwimmer of 3991 Saxon Ave LLC submitted a major alteration application for the conversion of the 33,208 square-foot commercial (COM) building at 846 Brook Avenue in Longwood, Bronx, to a residential building with 88 apartments. The filing states the building has 27,833 square feet of zoning square feet. The plan was filed with the New York City Department of Buildings on May 25, 2026 under job number X01406972. The project is described in the filing as: application filed herewith to convert an existing five-story community facility building into an 88-family residential building. The architect is Lester Katz.
Assistant Attorney General Jeffrey Chester approved the petition on May 27, 2026.
Petition Approval of 3144 Third Avenue
846 Brook Avenue
| wdt_ID | wdt_created_by | wdt_created_at | wdt_last_edited_by | wdt_last_edited_at | floor | comment | description | persons_permitted | occupancy_label | zoning_use | dwelling_units |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | acris | 05/29/2026 05:14 AM | acris | 05/29/2026 05:14 AM | Cellar | LAUNDRY ROOM, REFUSE ROOM, WATER-SPRINKLER ROOM, ELECTRICAL ROOM | Apartment | N/A | Residential | ||
| 2 | acris | 05/29/2026 05:14 AM | acris | 05/29/2026 05:14 AM | Cellar | NINE (9) CLASS 'A' DWELLING UNITS | Apartment | N/A | Residential | 9 | |
| 3 | acris | 05/29/2026 05:14 AM | acris | 05/29/2026 05:14 AM | 1 | FIFTEEN (15) CLASS 'A' DWELLING UNITS | Apartment | 40 | Residential | 15 | |
| 4 | acris | 05/29/2026 05:14 AM | acris | 05/29/2026 05:14 AM | 2 | SIXTEEN (16) CLASS 'A' DWELLING UNITS | Apartment | N/A | Residential | 16 | |
| 5 | acris | 05/29/2026 05:14 AM | acris | 05/29/2026 05:14 AM | 3 | SIXTEEN (16) CLASS 'A' DWELLING UNITS | Apartment | N/A | Residential | 16 | |
| 6 | acris | 05/29/2026 05:14 AM | acris | 05/29/2026 05:14 AM | 4 | SIXTEEN (16) CLASS 'A' DWELLING UNITS | Apartment | N/A | Residential | 16 | |
| 7 | acris | 05/29/2026 05:14 AM | acris | 05/29/2026 05:14 AM | 5 | SIXTEEN (16) CLASS 'A' DWELLING UNITS | Apartment | N/A | Residential | 16 | |
| 8 | acris | 05/29/2026 05:14 AM | acris | 05/29/2026 05:14 AM | Roof | ELEVATOR MACHINE ROOM, STAIR BULKHEAD | Apartment | N/A | Residential |
Boom!Community Services, a drug treatment organization affiliated with a related nonprofit, Boom!Health, bought the building in June 2016 for $4.95 million. The $1.66 million in net proceeds after closing costs and loan paydown, will be distributed to Boom!Health.
The property
The office building in Longwood has 33,208 square feet of built space according to a PincusCo analysis of city data. The parcel has frontage of 59 feet and is 89 feet deep with a total lot size of 6,005 square feet. The lot is irregular. The zoning is C4-4 which allows for up to 3.4 times floor area ratio (FAR) for commercial and up to 3.44 times FAR for residential. The city-designated market value for the property in 2022 is $4.3 million.
Prior sales, articles and revenue
This property was sold for $4.95 million on June 16, 2016.
The 33,208-square-foot property generated revenue of $921,232 or $28 per square foot, according to the most recent income and expense figures.
Development
For the tax lot building, it received its initial certificate of occupancy on August 22, 2017.
Violations and lawsuits
According to city public data, the property has not received any significant violations in the last year.
There were no lawsuits or bankruptcies filed against the property for the past 24 months.
The neighborhood
In Longwood, The bulk, or 44 percent of the 22.3 million square feet of commercial built space are elevator buildings, with walkup buildings next occupying 27 percent of the space. In sales, Longwood has near average sales volume among other neighborhoods with $105.7 million in sales volume in the last two years and is the 13th highest in Bronx. For development, Longwood has near average amount of major developments among other neighborhoods and is the 2nd highest in Bronx. It had 3.6 million square feet of commercial and multi-family construction under development in the last two years, which represents 16 percent of the neighborhood’s built space.
The block
On this tax block, PincusCo has identified the owners of two of the five commercial properties representing 58,120 square feet of the 106,938 square feet. The two identified owners are Nyc Department Of Housing Preservation And Development and Phipps Houses. There are no active new building construction projects on this tax block.
The surrounding
Within a 400-foot radius of 848 Brook Avenue, PincusCo identified one commercial real estate item of interests occurred over the past 24 months. It was a new building permit application filed on March 23, 2026 for a 176,405-square-foot residential (R-2) building with 214 residential units at 3116 Third Avenue.
Direct link to the property’s ACRIS page and link to DOB NOW portal.