Nassau County's Dedicated Additions Specialists
Nassau County Home Additions
More Space. Same Home. Same Neighborhood. We build room additions, second stories, dormers, and extensions for Nassau County homeowners — and we handle every permit, every step.
Nassau County Home Addition Services
Home Additions
Full structural room additions that expand your living space — master suites, family rooms, and multi-room expansions. Nassau County permits handled end to end.
Second Story Additions
Add a complete second floor to your existing home — the most efficient way to double your square footage without losing yard space. We handle all structural engineering.
Home Extensions
First-floor extensions that expand a kitchen, living room, or dining area. Faster to permit and build than a full addition — ideal for many Nassau County lots.
Dormers
Transform your attic or roofline into livable space. Shed, gable, and hip dormers — the most cost-effective solution for South Shore Nassau County homes with limited lot coverage.
Mother-Daughter Extensions
A private in-law suite with separate entrance — built to Nassau County code with proper egress, kitchen, and bathroom. We handle all zoning and permit requirements.
Basement Finishing
Convert your unfinished basement into fully livable square footage — family room, home office, guest bedroom, or home gym. Nassau County egress and code compliance included.
How Our Nassau County Addition Process Works
Step 01
Free On-Site Consultation
We walk your property, assess your lot's zoning limits, and tell you exactly what's possible — honestly. No surprises, no sales pitch.
Step 02
Design & Permit Filing
We handle all Nassau County building department submissions, engineering drawings, and permit approvals. Average timeline: 4–8 weeks depending on your municipality.
Step 03
Licensed Construction
Our crews build your addition from foundation to finish. We keep you updated at every phase and never hand work off to subcontractors.
Step 04
Final Inspection & Sign-Off
We walk the completed addition with you and coordinate the final municipal inspection — your project is done when it's done right.
Nassau County Home Addition ContractorsSpecialists Only.
Most contractors offer additions as one item on a long list of services. We don't. Every project we take is a home addition, extension, or second story — and every one is permitted through Nassau County by us.
What Nassau County Homeowners Say
"We added a full second story to our Rockville Centre home. The permit process alone would have taken us months to figure out — they handled everything in six weeks. The crew was professional, on schedule, and the addition looks like it was always part of the house."
Michael R.
Rockville Centre — Second Story Addition
"We compared bids and every other contractor was a generalist. Nassau County Home Additions only does additions — you could tell from the first call they'd done this hundreds of times. Our dormer conversion came out better than we imagined."
Sandra K.
Lynbrook — Dormer Conversion
"We needed a mother-daughter extension for my wife's parents. The zoning requirements in Valley Stream for a separate entrance are complicated. They knew exactly what was allowed and had the permit approved on the first submission. Outstanding."
Frank T.
Valley Stream — Mother-Daughter Extension
Nassau County Communities We Serve
We build home additions and extensions across all of Nassau County — from Valley Stream and Lynbrook on the South Shore to Garden City, Great Neck, and Manhasset further north. If you're in Nassau County, we serve your town.
Request a Free Home Addition Quote
Tell us your address, the type of addition you're considering, and your timeline. We'll confirm what's permitted on your lot and schedule a free on-site consultation.
Or call: 516 494 3370
Thank you!
We've received your request and will be in touch shortly.
Ready to Build Your Nassau County Home Extension?
Serving Valley Stream, Garden City, Great Neck, Manhasset, Rockville Centre, Lynbrook, and all of Nassau County. Call Nassau County Home Additions for a free on-site estimate.