439 East 135th Street, Bronx

24 open violations and a history of winter heat outages in a 10-unit pre-war building.

A building this size usually runs with a much shorter punch list. Having 24 active violations, even with no immediate hazards currently labeled, indicates a slow response to maintenance. Four things to know:

24 open violations are currently active on this 10-unit building. A building of this scale shouldn't run with this many open items. It indicates a systematic delay in resolving housing standards. Simon Moskowitz is registered as the head officer, but these outstanding violations have yet to be officially cleared.

Three indoor air quality complaints on the block over the last year signal potential riser bleed. These three complaints were logged in the immediate corridor, with the most recent filed on June 8, 2026. In historic structures, restaurant exhaust, sewer vents, or chemical odors can travel upward through shared wall cavities, seeping straight into residential units.

23 heat and hot water complaints point to a recurring winter struggle. All 23 building-wide complaints clustered between late September and December of 2025. When entire-building heat calls stack up day after day during cold weather, it usually means the boiler is struggling to hold pressure or keep the pilot lit under heavy load.

The building's underlying debt is held by a recovery venture following a bank collapse. Property filings show a December 2023 mortgage assignment transferring the building's debt from the defunct Signature Bank to a recovery venture, following a $2.55 million mortgage transaction in 2019. When properties land in complex receiverships, day-to-day capital repairs can get stuck in financial limbo.

Quieter signals on this building and the blocks around it:

• 138 illegal parking calls within three blocks over the last year, with 27 specifically blocking hydrants
• 120 unsanitary condition reports on the block, primarily split between 58 pest complaints and 38 mold reports
• Two appliance complaints about cooking ranges from late 2025 that have since been closed out
• While the corridor is active, the building's physical systems are where you should focus.

439 East 135th Street is a 10-unit building in Bronx, New York City (BBL 2022800060). This building is associated with Sig Rcrs C Mf 2023 Venture LLC. Brix tracks 24 open HPD violations for this property, along with inspection history, DOB filings, tenant complaints, and rent stabilization status.

Built in 1931, this walk-up apartment building sits in Bronx and is tracked by Brix using public NYC records from HPD, DOB, ACRIS, and 311.

Tenants have filed 172 HPD complaints about this building over the last five years, most often about heat/hot water.

What tenants have called the city about here over the last five years:

• Heat/hot Water: 66 complaints
• Door/window: 37 complaints
• Unsanitary Condition: 16 complaints
• Paint/plaster: 12 complaints

The most recent complaint on this building was filed December 3, 2025.

Conditions cited on open violations at this address:

• § 27-2089 ADM CODE THE PREMISES HAVE BEEN VACATED BY AN ORDER OF THIS DEPARTMENT AND CANNOT BE REOCCUPIED EXCEPT FOR CARETAKER, UNTIL (1) AN APPLICATION AND PLA
• § 27-2005 ADM CODE & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF FIRE DAMAGE IN THE ENTIRE APARTMENT LOCATED AT APT 1E, 1st STORY, APARTMENT AT SOUTH
• § 27-2005 ADM CODE & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF FIRE DAMAGE IN THE ENTIRE APARTMENT LOCATED AT APT 1W, 1st STORY, 1st APARTMENT FROM WEST AT N
• § 27-2005 ADM CODE & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF FIRE DAMAGE IN THE ENTIRE APARTMENT LOCATED AT APT 5E, 5th STORY, 1st APARTMENT FROM EAST AT S

The building last changed hands on December 15, 2023, according to recorded deeds.

Brix rating: Concerning (0/100). View the Building Report on Brix.

See every NYC building owned by Sig Rcrs C Mf 2023 Venture LLC on the landlord portfolio page.