General Contractor
in Park Slope, NY

All residential renovation work in Park Slope requiring structural, plumbing, electrical, or HVAC modifications must be filed with the NYC Department of Buildings (DOB) through a DOB-registered architect or engineer. Park Slope's predominantly row-house building fabric — three- and four-story brownstones built in continuous party-wall configurations on 100-foot deep lots — creates specific permit and structural conditions that must be addressed in every filing. Any work affecting the party walls shared with adjoining properties requires a structural engineering assessment; formal notification to adjoining property owners under New York State law may be required depending on the scope. Within the Park Slope Historic District, the NYC Landmarks Preservation Commission requires a Certificate of Appropriateness for all exterior alterations visible from a public way — including window and door replacement, facade masonry repair or repointing, rooftop additions, and modifications to the original stoop configuration. The DOB permit for exterior alterations in the Historic District cannot be issued until LPC CofA is obtained; for work that does not alter exterior-visible features, the DOB permit process proceeds independently of LPC. JMR manages the complete regulatory sequence — DOB filing, LPC review coordination, structural party-wall assessment, and DOB BIS research — as an integrated part of every Park Slope project.

The Park Slope Historic District (LPC, 1973) covers the dense Romanesque Revival and Italianate brownstone rowhouse blocks from Flatbush Avenue west to Eighth Avenue, and from St. Johns Place south to Prospect Avenue. Within the district, a Certificate of Appropriateness is required for any exterior alteration visible from a public way. The district's character guidelines address the specific architectural elements of the 1870s–1910s rowhouse tradition: original brownstone facade planes, stoop configurations, iron newel posts and railings, window opening proportions, cornice profiles, and masonry coursing. Interior renovations do not require LPC review. JMR prepares CofA applications and coordinates with LPC for all exterior alterations within the Park Slope Historic District.

A full gut renovation of a Park Slope brownstone within the Historic District involves two parallel regulatory processes that must be coordinated from the outset. The DOB permit process — covering all structural, plumbing, electrical, and HVAC modifications — requires a DOB-registered architect or engineer to file an alteration application with complete construction documents. The LPC Certificate of Appropriateness process runs in parallel for any exterior alteration visible from a public way, including window and door replacement, facade masonry work, stoop modifications, rooftop elements, or changes to the rear facade visible from the street or a public alley. The DOB cannot issue the exterior alteration permit until the LPC CofA is obtained; for interior-only work, the DOB permit proceeds independently. Additionally, any work affecting the party walls shared with adjoining brownstones requires a structural engineering assessment and, depending on scope, formal notice to adjoining owners under New York State law. JMR's Park Slope brownstone renovation process begins with a DOB BIS research review — establishing the building's existing CO classification, open violations, prior permit history, and party-wall configuration — before any design or scope is proposed.

Garden-level kitchen renovations in Park Slope brownstones — where the kitchen occupies the rear of the parlor-floor basement level, typically below grade at the front and at grade or above grade at the rear garden — involve DOB permit requirements for any plumbing, electrical, or structural modifications. The garden-level kitchen is frequently positioned adjacent to or directly above the building's original foundation, and drain lines from this level must connect to the building's main drain stack, which in 19th-century Park Slope construction is typically located in the party wall or at the rear of the building. Reconfiguring the kitchen layout to reposition the sink or add a dishwasher connection requires routing new drain lines within the existing floor depth, which is constrained by the original joist framing of this level. If the renovation includes extending the kitchen footprint into the rear yard through a rear addition, the addition requires a separate DOB filing, and any visible exterior element within the LPC Historic District boundaries requires Certificate of Appropriateness review. JMR's kitchen assessment documents the existing drain configuration, floor joist depth, and party-wall proximity at the proposed kitchen location before any layout is proposed.

JMR has completed 12 projects in Park Slope — including full brownstone gut renovations retaining original parlor plaster cornices and stoop ironwork, rear kitchen extensions coordinated with LPC Certificate of Appropriateness review, and primary suite renovations requiring structural party-wall assessment — with all permits filed through the NYC Department of Buildings Brooklyn Borough Office.