If you’re thinking about adding more living space to your home, dormers or extensions are the way to go. Dormers and extensions add more than just space, they add dimension and character to the existing structure. You can add a bedroom, a master bath, even an entire second floor with custom dormers. This is a great way to accommodate a growing family without leaving your home. Add a great room with a toasty fireplace that your family can enjoy for years to come. The possibilities are endless, the project is simple.
Dormers, Extensions & Home Additions on Long Island, NY
No region in America is better suited to the dormer than Long Island. The island's signature house — the compact Cape Cod built by the tens of thousands during the postwar boom that Levittown launched in 1947 — was designed with a steep roof and an unfinished attic that practically begs to become living space. A full rear shed dormer can turn that attic into two bedrooms and a bath; a front gable dormer adds light and curb appeal. For families who love their block but have outgrown their footprint, dormers and extensions deliver the space of a move without leaving the school district, and typically cost far less than trading up in today's market.
We build dormers, side and rear extensions, and full second-story additions across Nassau and Suffolk, managing the structural engineering, town building permits, and weather-tight sequencing that keep your family comfortable while the roof is open. Because Long Island towns each enforce their own zoning — height limits, setbacks, and floor-area rules vary from North Hempstead to Babylon — we prepare plans that pass the local review the first time. Older homes get extra care: when an addition disturbs painted surfaces on a pre-1978 house, federal lead-safe renovation practices apply, and our licensed, insured crews follow them. Every project begins with a free estimate and honest guidance.
Water, fire, mold or asbestos emergency? We answer 24/7 and bill your insurance directly.
877-AIR-8070Request a Free QuoteAddition & Dormer Planning Resources on Long Island
An addition touches more rules than almost any other home project: zoning setbacks, state structural and energy codes, county contractor licensing, and — on the island's huge stock of pre-1978 homes — federal lead-safe work practices. The official resources gathered here let Nassau and Suffolk homeowners research those requirements straight from the source, including two town building departments that review thousands of dormer and extension permits, the state's code division, the EPA's renovation rules, and Nassau's licensing office.
- Town of North Hempstead Building Department — Nassau homeowners in North Hempstead file dormer and addition permits with this department, which enforces both state and town codes.
- Town of Babylon Building Department — In southwestern Suffolk, Babylon's building department reviews extension plans against the town's zoning ordinances and building codes.
- NYS Division of Building Standards and Codes — Structural, fire, and energy provisions for additions come from the state Uniform Code maintained by this division.
- EPA Lead-Safe Renovation, Repair and Painting — Because most Long Island capes predate 1978, the EPA's RRP consumer page explains why lead-safe certified practices matter when an addition opens old walls.
- Nassau County Licensing — Before hiring an addition contractor in Nassau, homeowners can review the county's home improvement licensing requirements here.
Frequently Asked Questions
Can you add a dormer to my Long Island cape?
Yes — dormers and extensions are one of our specialty construction services. We handle the design coordination, permits, framing, roofing, siding, and interior finish as a single licensed contractor.
Are you properly licensed for additions in Nassau and Suffolk?
We are licensed and insured in both counties, under Nassau County License #H0306780000 and Suffolk County License #50966-H.
Will I pay anything for an estimate on an extension?
No. We provide free estimates on dormers, extensions, and every other construction project, so you can plan your addition with real numbers in hand.
Can your other trades finish the new space completely?
Yes. Because our construction services include roofing, siding, masonry, HVAC, kitchens, and bathrooms, the same company that frames your dormer can finish it into livable space.
Why choose a family builder for an addition?
Three generations of our family have worked on Long Island homes, serving Nassau and Suffolk County for over 30 years — experience that shows when tying new construction into an older house. Call 877-AIR-8070 to talk it through.