Serving in Nassau & Suffolk County, Long Island
Who We Are &
How We Work.
What We Stand For
Built on Integrity.
Finished with Pride.
Custom Design & Contracting LLC is a licensed and insured general contracting company serving Long Island, NY — built on a simple promise: your home, exactly the way you pictured it. Owner James Donnelly runs every job with the same standard: no shortcuts, no excuses, no cutting corners on quality.
What We Do
Custom Design and Contracting LLC is a full-service general contracting company serving Nassau and Suffolk County, Long Island. We specialise in kitchen and bathroom remodels, full home renovations, flooring, cabinet and countertop supply and installation, framing, and interior finishing.
The Standard We Hold
We've built our reputation on integrity, honesty, and personal accountability. We know how important it is to find a contractor you can actually trust one who answers the phone, shows up on time, and does the work they promised.
We Install & Supply
One of the things that sets us apart: we supply the materials too. Cabinets, countertops, flooring — you don't have to run to showrooms, coordinate deliveries, or deal with separate vendors. We source everything directly and install it ourselves.
Design Before We Build
We plan every detail before a tool comes out. Layouts, material selections, finishes, and timelines are all agreed upon before construction begins. No surprises. No mid-project decisions you weren't expecting. Just a clean process from start to finish.
Owner & Lead Contractor
James Donnelly
"We built this company on three things: showing up, doing the job right, and treating every home like it's our own."
Special Discounts
New Customers
Special pricing for first-time clients
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Military
Discount for active duty & veterans
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First Responders
Police, fire, EMS & emergency services
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Senior Citizens
Senior Citizens
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