10 Prospect Place, Brooklyn, NY 11217

10 Prospect Place is a three-story, two-family residential building located in Park Slope, Brooklyn, owned by Caroline Putz and constructed in 1880. The property has experienced several significant issues in recent years, most notably a series of unauthorized construction activities that began in September 2023 and resulted in multiple violations.

These violations, which remain active as of now, include unpermitted alterations that reportedly left the building structurally compromised, with documented concerns about significant cracking in the third-floor wall, unsecured floors, debris, and unbraced CMU walls in the rear yard. The building was placed under structural monitoring and received a Special Operations Compliance Inspection in late 2023, during which a Stop Work Order was issued and subsequently rescinded in late 2024. The property has also been the subject of multiple Department of Health and Mental Hygiene (DOHMH) complaints regarding rodent sightings in 2021, though these were resolved relatively quickly.

Violation and complaint records show a pattern of construction-related issues, with the most recent activity in 2025 involving two CSC Actions, along with inspections that found no violations for Unlicensed/Illegal Activity and building permits. While some violations from 2023 were dismissed after the responsible party complied with the Commissioner's order, others related to unpermitted alterations and failure to maintain code compliance remain active, suggesting ongoing concerns about building safety and maintenance. The inspector's observations noted extensive gut renovation work being conducted without proper permits or documentation, including removal and replacement of plumbing, electrical systems, and floor joists, as well as unauthorized construction of a deck and fence using CMU blocks.