Dreaming of more space without leaving your building? Combining two or more apartments is one of the most rewarding — and complex — renovations in NYC. Knockout Renovation has the expertise to handle structural engineering, permit management, and seamless design integration.

Engineering & Permits
Apartment combinations require structural analysis, DOB permits, and co-op/condo board approval. Our team manages the entire process — from hiring licensed engineers to filing all necessary paperwork — so you can focus on designing your expanded home.
- Licensed structural engineering assessment
- DOB permit filing and expediting
- Co-op/condo board application support
- Load-bearing wall analysis and modifications
- Fire safety and egress compliance
Seamless Design Integration
The goal is to make your combined space feel like it was always one home. We match flooring, align ceiling heights, unify HVAC systems, and create a cohesive layout that flows naturally from room to room.
- Unified floor plan design
- Matching flooring and finishes across units
- HVAC system integration
- Electrical panel consolidation
- Custom millwork and built-ins
- Open-concept living areas
Related Services
Ready to Get Started?
Book a free consultation and let our experts create a custom renovation plan for you.
Book Free Consultation