NYC Building Permits and Plans. We Know Every Layer of the Process.

The most common high-value renovation project in NYC. Floor additions, rear yard extensions, cellar-to-basement conversions, full gut renovations — these almost always require an Alteration Type 1 with a new or amended Certificate of Occupancy.

• Alt-1 filing with new CO — full architectural and structural drawings required
• Rear yard and lot coverage calculations for zoning compliance
• Party wall agreements and neighbor notifications when required
• LPC review for buildings in historic districts
• Strongest demand in Park Slope, Carroll Gardens, Brooklyn Heights, West Village, UWS

Interior alterations in co-ops and condos require both board approval and DOB filing. Kitchen and bathroom reconfigurations, combined apartments, structural modifications — we handle the full documentation package your alteration agreement requires.

• Alt-2 and Alt-3 applications for interior alterations
• As-built drawings for combined apartments
• MEP (mechanical, electrical, plumbing) coordination documents
• Wet over dry waiver applications where applicable
• High demand on the Upper East Side, Upper West Side, Tribeca, and Downtown Brooklyn

Unit conversions, egress upgrades, basement unit legalizations — multi-family work is often the most complex permit territory in NYC. CO amendment work requires careful navigation of occupancy classifications and zoning use groups.

• CO amendment applications for unit conversions
• Egress analysis and fire safety compliance documentation
• Basement dwelling legalization under City of Yes (2024)
• Zoning use group analysis for mixed occupancy
• High volume in Astoria, Jackson Heights, Flatbush, and the Bronx

NYC has 143 historic districts. Any building within one requires concurrent Landmarks Preservation Commission (LPC) approval alongside DOB filing. Most expeditors do not handle LPC — we do both simultaneously so your project does not stall.

• LPC Certificate of Appropriateness applications
• LPC staff-level approval for minor work
• Coordinated LPC and DOB filing to prevent timeline gaps
• Facade and window specifications that satisfy LPC requirements
• Key districts: Brooklyn Heights, Cobble Hill, Park Slope, Greenwich Village, Upper East Side HD

The December 2024 City of Yes zoning amendment legalized ADUs across one- and two-family residential districts citywide for the first time. This is one of the fastest-growing permit categories in NYC — and we are already filing them.

• ADU design and architectural plans under new City of Yes rules
• Basement dwelling legalization program compliance
• Detached garage conversions, rear yard structures, and interior ADUs
• Egress window, ceiling height, and light and air compliance
• High demand in Staten Island, Southeast Brooklyn, Southeast Queens, and the Bronx

New Building (NB) filings in NYC require coordination across multiple city agencies — DOB, DOT, DEP, and FDNY at minimum. We handle the full construction document package and multi-agency filing from day one.

• Full CD set — architectural, structural, MEP
• New Building (NB) DOB NOW filing
• Multi-agency coordination — DOB, DOT, DEP, FDNY
• Demolition permit applications and site safety plans
• Special inspections program coordination