Custom built-ins, trim, staircases & antique furniture restoration. Precision craftsmanship serving Brooklyn, Manhattan, Queens, Long Island & Nassau County.
From custom built-ins to antique restoration, our craftsmen bring decades of experience to every project.
Floor-to-ceiling shelving, entertainment centers, home office built-ins & custom cabinetry designed and built to your exact specifications.
Crown molding, baseboard installation, chair rails, wainscoting & decorative millwork to elevate your interiors throughout NYC.
Stair tread replacement, baluster repair, newel post installation & complete staircase renovations for NYC apartments & brownstones.
Careful restoration of antique furniture, hutches, dining tables & heirloom pieces. We bring old wood back to its original beauty.
Interior & exterior door installation, hanging, hardware fitting & repair. Pocket doors, French doors & barn doors throughout NYC.
Shiplap, board & batten, coffered ceilings & decorative wood paneling to add character and warmth to any room in NYC.
Beyond interior millwork, we specialize in custom staircases and outdoor carpentry. Browse our specialty services below.
Custom-built staircases — straight, L-shaped, U-shaped, spiral & floating designs for NYC homes and brownstones.
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Modernize tired or outdated staircases with new treads, risers, railings & balusters.
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Preserve historic brownstone staircases — period-correct restoration of original woodwork and details.
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Partial improvements — new railings, balusters, treads, or modern handrails without full renovation.
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Custom decks built from scratch — pressure-treated, cedar, composite Trex with railings and stairs.
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Refinish, repair, or rebuild aging decks. Board replacement, sanding, staining & structural reinforcement.
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Pergolas, gazebos, fences, exterior trim, siding repair & all outdoor woodwork projects throughout NYC and Long Island.
Explore Exterior Carpentry
Our carpenters have decades of experience working in NYC homes, brownstones, co-ops and commercial spaces.
Meet to discuss your vision, take measurements, and create custom design that fits your space perfectly.
Choose wood species, stain, hardware, and finish options. We source quality materials from trusted NYC suppliers.
Detailed shop drawings showing exact dimensions, joinery, and details before any wood is cut.
Skilled carpenters build your custom pieces in our shop using precision tools and traditional joinery techniques.
Multi-stage sanding from rough to fine grit. Apply stain or paint with proper sealing and protection.
Protect floors and walls. Verify all measurements are accurate before installation begins.
Professional installation with proper anchoring, leveling, and integration with existing trim and walls.
Final touch-ups, caulking, painting where needed, and walkthrough to ensure perfect results.
"Sani Building Corp built beautiful custom built-in shelving and a window seat in our Brooklyn brownstone. The craftsmanship is exceptional — perfectly fitted, beautifully finished, and exactly what we envisioned."
"Zura and his team restored my great grandmother's hutch, dining table and writing desk. The work was incredible — they brought pieces back to life that I thought were beyond saving. Highly recommend!"
"Had them install crown molding and wainscoting throughout our entire Long Island home. The attention to detail on the corners and transitions was impeccable. Our home looks like it belongs in a magazine now."
"Our staircase in our Queens home was completely worn out — loose balusters, damaged treads, and a wobbly newel post. Sani Building Corp repaired everything perfectly and it looks brand new. Very professional team."
"They installed a custom home office built-in with floor-to-ceiling shelving and a built-in desk in our Long Island City apartment. Made perfect use of an awkward space. The quality is outstanding."
"Sani Building Corp installed barn doors and new interior doors throughout our Manhattan apartment. Perfect installation, great hardware selection advice, and they finished ahead of schedule."
Serving Brooklyn, Manhattan, Queens, Long Island & Nassau County. Free estimates, fully insured.