Rear & Side Extensions
Single-story additions for a bigger kitchen, family room, mudroom or primary suite.
Extensions & dormers · Nassau County
Home extensions & dormer additions
More space without moving. As roofers and general contractors, we tie every new roofline into your existing home the right way.
Extensions & Dormers
Add space that looks like it was always there
Extensions and dormers change your home’s structure and roofline, which is exactly where most additions go wrong. Our roofing background means the new roof ties into the old one cleanly and stays watertight.
We handle framing, roofing, windows, siding, insulation and interior finishes, and we manage permits and inspections with your town or village.
What we offer
Extension & dormer services
Every addition is designed to match your home’s style and built to code.
Second-Story Additions
Add a full floor of bedrooms and bathrooms without giving up your yard.
Shed Dormers
Turn a cramped attic into usable rooms with full head height and natural light.
Gable Dormers
Classic dormers that add light, character and curb appeal to Cape Cods and colonials.
Why Cove
What you can count on
The standards that built our roofing reputation apply to every project.
Roofing expertiseSeamless, watertight rooflines.
Permits handledPlans, filings and inspections.
Matched exteriorsSiding, trim and windows that blend in.
One contractorFrom foundation to finishes.
How it works
From first call to final walkthrough
A clear, four-step process with no surprise change orders.
Walkthrough
We visit your home, look at the roof or the space, and talk through your goals and budget.
Plan & estimate
You get a clear written scope, material options and an itemized price.
Build with care
One project manager coordinates every trade, with daily cleanup.
Final walkthrough
We review the finished work together and complete the punch list.
Do I need an architect for an addition?
Most extensions and dormers require stamped drawings for the permit. We can work with your architect or recommend one we trust.
How long does a dormer addition take?
A typical dormer takes three to six weeks of construction once permits are approved. Full extensions and second stories take longer.
Will my home be exposed to weather during construction?
We plan the work so openings in the roof are dried in quickly, usually within the same day, and protected with tarps and underlayment.
More services
Other ways we can help
Roofing Services
New roofs, roof replacement, flat roofing and protective roof coatings.
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Home Remodeling
Whole-home and multi-room renovations, planned and built as one project.
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Kitchen Remodeling
Layouts, cabinetry, countertops and lighting for the busiest room in the house.
Learn moreReady to talk about your extensions & dormers project?
Call 516-550-0670 or request a free estimate online. We serve Glen Cove and all of Nassau County.