You’re not looking to move. You like your neighborhood, your commute, your schools. But you need another bedroom, a real home office, or just somewhere to put everything that’s currently piled in the hallway.
Going out isn’t an option. Locust Valley zoning doesn’t give you much room to work with, and your lot size isn’t doing you any favors either. That’s where dormers make sense.
A dormer lets you go up instead of out. You’re using space that’s already there—your attic—and converting it into something functional. No foundation work. No eating up your backyard. Just a roof extension that adds square footage where you actually need it.
Most projects take four to eight weeks. You get a bedroom, bathroom, office, or studio without the timeline or cost of a full addition. And because you’re adding livable space, your home’s value goes up too.
We’ve been handling large-scale projects across Nassau and Suffolk County since the early ’80s. Dormers, extensions, full renovations—we focus on the jobs that require experience, not just a crew.
We answer the phone. We show up when we say we will. If something goes wrong—frozen pipes, a leak, whatever—we handle it. That’s not marketing talk. It’s just how we operate.
Locust Valley homes come with their own challenges. Older construction, strict zoning, weather that swings hard in both directions. We’ve worked in enough attics here to know what holds up and what doesn’t. You’re not getting a generic approach. You’re getting a dormer built for this climate and this market.
First, we come out and look at your attic. Not every roof can handle a dormer, and not every layout makes sense for one. We’ll tell you what’s possible, what’s not, and what it’s going to cost before anything gets started.
If we’re moving forward, we pull permits and handle the approvals. On Long Island, that process can drag, so we get it going early. Once permits clear, framing starts. That’s typically seven to ten days, weather depending.
After framing, we weatherproof everything—flashing, sealing, insulation. This is where a lot of contractors cut corners, and it’s also where you end up with leaks or drafts a year later. We don’t skip it.
Then comes interior work. Drywall, electrical, flooring, trim—whatever the room needs to be finished and livable. You’ll have access to the rest of your house the whole time, and we keep the site clean. No one wants to live in a construction zone longer than they have to.
Ready to get started?
A dormer isn’t just a bump-out on your roof. It’s a full room addition—walls, windows, insulation, electrical, HVAC if needed. You’re getting finished, livable space that matches the rest of your home.
In Locust Valley, where home prices average over a million and lot sizes don’t leave much room for expansion, a dormer is one of the few ways to add square footage without major disruption. You’re not tearing up your foundation or losing your driveway for three months.
We build shed dormers and gable dormers depending on your roof pitch and what you’re trying to accomplish. Shed dormers give you more headroom and square footage. Gable dormers add character and work well on Colonial or Cape Cod-style homes, which make up a lot of the housing stock around here.
Everything gets insulated properly for Long Island winters. That means spray foam in the right places, proper ventilation so your attic doesn’t turn into an oven in July, and flashing that actually keeps water out. We’ve seen what happens when that stuff gets overlooked. It’s expensive to fix later.
Most dormer projects in Nassau County run between $30,000 and $60,000, depending on size and what’s included. A small gable dormer for a bathroom is on the lower end. A full shed dormer that adds a primary suite with a bathroom is on the higher end.
Long Island costs more than other parts of the state. Permits take longer. Labor costs are higher. Materials cost more. That’s just the reality of building here.
We give you a fixed price upfront. No surprises, no change orders unless you change the scope. You’ll know what it costs before we start, and that number doesn’t move unless you add something.
Plan on four to eight weeks for most projects. Framing takes about a week to ten days. Weatherproofing and exterior work takes another week. Interior finishing—drywall, paint, flooring, trim—takes two to three weeks depending on what’s involved.
Delays happen. Permits get held up. We find something in the framing that needs reinforcement. Weather shuts us down for a few days. We build buffer time into the schedule so you’re not left guessing.
You’ll have access to the rest of your house the entire time. We’re not tearing up your kitchen or blocking your front door. The work stays contained to the attic and roof area, and we clean up at the end of every day.
Yes. Adding livable square footage increases your home’s value, especially in a market like Locust Valley where space is limited and demand is high. Studies show property values can increase by 15% to 22% with a well-executed attic conversion.
You’re also adding a bedroom or bathroom, which matters when it’s time to sell. Homes with more bedrooms and bathrooms sell faster and for more money. That’s especially true in areas with good schools and high household incomes, which describes most of Nassau County.
Return on investment for dormers typically falls between 60% and 80%. That’s better than most other home improvement projects. You’re not just making your house more comfortable—you’re making it more valuable.
Yes. Any structural work that changes your roofline or adds square footage requires a permit in Nassau County. That includes dormers.
We handle the permit process. You’re not filling out paperwork or standing in line at the building department. We submit everything, handle the inspections, and make sure it all gets approved before we start framing.
Permit timelines vary. Sometimes it’s two weeks. Sometimes it’s six. We start the process early so it doesn’t hold up your project. And if the inspector asks for changes, we handle it. You’re not dealing with any of that.
A shed dormer runs along the length of your roof and gives you the most usable space. It’s a single sloped roof that extends out from your existing roofline. You get more headroom, more square footage, and more flexibility for layout. Most people choose shed dormers when they’re adding a bedroom or full bathroom.
A gable dormer is smaller and projects out from the roof with its own peaked roofline. It adds character and works well on Colonial or Cape Cod homes. You don’t get as much interior space, but it looks more traditional and fits the architecture better in some cases.
Which one makes sense depends on your roof pitch, your home’s style, and what you’re trying to accomplish. We’ll walk you through both options when we come out for the estimate.
Yes. That’s one of the main reasons people add dormers. You can fit a full bathroom, a bedroom, a home office, or even a primary suite depending on how much space you’re working with.
Bathrooms require plumbing and ventilation, which we route through the existing walls or run new lines if needed. Bedrooms need egress windows for code compliance, which we include in the design. If you’re adding HVAC, we tie into your existing system or add a mini-split if that makes more sense.
Everything gets finished to match the rest of your house. Same flooring, same trim, same quality. When it’s done, it doesn’t look like an addition. It looks like it was always there.
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