Nassau County
Sunroom contractor Gilgo Beach, NY. Salt-air aluminum framing, wind-rated glass, Town of Babylon permits. Waterfront four-season rooms. Free estimate — (631) 565-8313.
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Nassau & Suffolk
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580+ Projects
Since 2011
Gilgo Beach sits on a barrier beach along the Fire Island seashore — a thin strip of land between the Atlantic Ocean and the Great South Bay, accessible via Ocean Parkway in the Town of Babylon. It is one of the more unusual addresses on Long Island: homes here face open ocean on one side and Great South Bay on the other, making it a setting that demands very different thinking from a standard Nassau County sunroom project.
We build four-season rooms and enclosed porches at barrier beach communities throughout the Town of Babylon, including Gilgo Beach, Cedar Beach, and the Fire Island National Seashore adjacent communities. If you have a waterfront or near-waterfront home here and want to add enclosed living space, the considerations are specific — and most sunroom contractors won't take the time to understand them.
Gilgo Beach falls within the Town of Babylon building jurisdiction. The Town of Babylon Building Department on Lindenhurst Avenue in Babylon handles all residential building permit applications for this area.
Permit requirements for a sunroom or enclosed porch addition at Gilgo:
Permit timeline for Town of Babylon is typically 6–10 weeks. We prepare and submit the complete package and handle all follow-up with the building department.
One note: homes in FEMA Special Flood Hazard Areas face specific restrictions on enclosed below-grade or at-grade space. For elevated or pier-foundation homes, we evaluate what's permissible before recommending a room type.
Most Gilgo homeowners who contact us are thinking about the same thing: extending their season by 3–4 months on each end. The shoulder months — March through May and September through November — are some of the best weather on the barrier beach, with comfortable temperatures, low humidity, and empty beaches. A proper four-season room with adequate heating makes those months fully livable without fighting the elements.
What we typically build at Gilgo and similar barrier beach communities:
Glass area. Larger glass panels maximize the water view and light. We use insulated, low-E glass rated for coastal wind loads — typically double-pane units with a 9/16" space and warm-edge spacers that prevent condensation on cold days.
Roof systems. Solid insulated roofs perform better at the shore than all-glass roofs for year-round use. Solar heat gain through an all-glass roof on an Atlantic-facing room in July can make the space unusable without mechanical cooling. We design the roof to balance light and comfort.
Heating and cooling. Most Gilgo beach homes are not connected to natural gas. A ductless mini-split system in the sunroom is the standard solution — efficient, powerful, and independent of the main HVAC system. We coordinate with licensed HVAC contractors on every four-season project.
Materials. Thermally broken aluminum frames are the minimum spec for a barrier beach project. If budget allows, fiberglass-reinforced frames offer superior resistance to coastal thermal cycling and virtually zero maintenance.
Typical cost range for a four-season sunroom at a Gilgo Beach property: $52,000–$90,000 depending on size, structural complexity, foundation conditions, and materials specified. We provide a fixed-price proposal after the site visit.
Can I build a year-round sunroom at Gilgo Beach?
Yes. A properly designed four-season room with insulated panels, thermally broken aluminum framing, and a ductless HVAC system is entirely suited to year-round use at a barrier beach location. The key is specifying materials that handle the marine environment: anodized frames, sealed fasteners, corrosion-resistant hardware.
What flood zone rules affect a sunroom addition at Gilgo?
Gilgo Beach is in a FEMA AE flood zone. For elevated homes (on piers or columns), the area below the elevated floor is typically restricted from being enclosed living space. For slab-on-grade homes above the base flood elevation, a sunroom addition may be permissible with proper flood-resistant design. We assess this on every Gilgo project before recommending a configuration.
Does the Town of Babylon require stamped engineering drawings for a Gilgo Beach sunroom?
In our experience, yes — coastal and barrier beach projects routinely require stamped structural engineering. We include this in our project scope for all Gilgo and waterfront jobs.
How much does salt air actually affect sunroom framing?
Significantly. Standard aluminum that is not properly anodized will show surface oxidation within 2–3 years at the barrier beach and can develop pitting and structural corrosion within 8–10 years in marine environments. Marine-grade anodized aluminum or thermally broken frames with sealed surfaces are the correct specification for any sunroom within a mile of open ocean.
What's the difference between a three-season and four-season sunroom for a beach property?
A three-season room is uninsulated — panels are typically single-pane glass or screened sections that let the season in. It's comfortable from April through October in most conditions. A four-season room is fully insulated — double-pane low-E glass, insulated panel roof, thermally broken frames — and is heated and cooled as a true additional room. For Gilgo, we recommend four-season construction given the wind and marine exposure.
Do you serve other barrier beach communities on the South Shore?
Yes. We serve Gilgo Beach, Cedar Beach, Jones Beach area, Point Lookout, Long Beach, and other South Shore coastal communities. The same marine-grade specifications apply throughout.
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Recent Work
We haven't posted a Gilgo-specific check-in yet, but here is recent work from the Nassau County towns nearest to you.
Built a 14×18 four-season sunroom off the back of a Garden City colonial — insulated Low-E windows, thermally broken aluminum frame, HVAC tie-in, and a coffered ceiling to match the interior.
Enclosed an existing 12×20 concrete patio with sliding window panels and a studio roof — no foundation work needed. Added a ceiling fan and recessed lighting.
Replaced a failing 2008-era sunroom with a properly engineered 16×18 four-season room — triple-pane windows, R-30 roof insulation, and split-system mini-split for year-round use.
Enclosed a 10×18 deck with a three-season patio enclosure — vinyl panels, aluminum frame, and a cathedral ceiling that tied into the gable end of the house.
Added a 14×20 year-round sunroom off the kitchen with radiant floor heat, insulated windows, and a heated slab foundation. Functions as a second dining area in winter.
12×16 three-season sunroom on a new concrete pier foundation. Double-pane windows on all three walls with a cathedral ceiling and exterior covered porch overhang.
Homeowner Reviews
Nearby Nassau County homeowners — we build across the same building departments, codes, and soil conditions.
“Tom and his crew built our four-season sunroom in under three weeks. We use it every single day, even in January. Best investment we made in this house.”
Jennifer M.
Massapequa, Nassau County
“We had a three-season room built last spring. By October we were still using it comfortably. The window quality and insulation are impressive for the price point.”
David W.
Garden City, Nassau County
“Tom gave us an honest assessment — told us our deck wasn't suitable for a full four-season room and recommended a three-season instead. Saved us $20k and we love the result.”
Susan T.
Great Neck, Nassau County
“Had a leaking sunroom installed by another company five years ago. Tom's team ripped it down, fixed the foundation issues, and built a proper four-season room. Night and day difference.”
Karen B.
Manhasset, Nassau County
“Replaced an old screened porch with a proper three-season sunroom. The difference in build quality is obvious. Solid framing, clean welds, no rattling when the wind picks up.”
Thomas H.
Merrick, Nassau County
“We live on a corner lot in Levittown and thought we didn't have room for a sunroom. Tom found a way to make it work with a 12x14 footprint off the kitchen. Perfect fit.”
Maria G.
Levittown, Nassau County
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