You’re not using the top floor of your home because it’s dark, cramped, and feels like storage. A dormer changes that completely.
Dormer installation brings natural light flooding into spaces that used to feel like caves. You get actual headroom where you couldn’t stand before. The ventilation improves, the temperature evens out, and suddenly that attic becomes the room everyone wants to be in.
This isn’t about squeezing another bedroom into your house just to check a box. It’s about creating space you’ll actually use—a home office with windows, a playroom where kids can spread out, or a master suite that doesn’t feel like you’re living in someone’s basement. Glen Head homes, especially the older ones, have great bones but weren’t built with modern space needs in mind. Dormers let you expand up instead of out, which means you’re not losing yard space or dealing with the nightmare of a full addition.
And when you eventually sell? Buyers see more square footage, better light, and a home that’s been thoughtfully improved. That’s value that sticks.
We’ve been doing this work in Glen Head and across Long Island for over 40 years. That’s not a marketing line—it’s just how long we’ve been showing up, answering the phone, and finishing what we start.
We’re a general contractor, but our focus is on the bigger projects: dormers, extensions, full kitchen and bathroom remodels, first-floor renovations. The kind of work that changes how you live in your home. We’re licensed, insured to $1 million, and we know Nassau County building codes inside and out because we’ve been working with them since before most of our competitors existed.
Glen Head homeowners deal with the same challenges across the North Shore—older homes with great potential but layouts that don’t fit how people live now. We’ve built dormers on streets you drive every day. Our crews keep job sites clean, we answer when you call, and if your pipes freeze in January, we respond. That’s just how we work.
First, we come out to look at your roof and attic. Not every home is set up the same way, so we need to see your roof pitch, your framing, and what’s actually possible given your structure. We’ll talk about what you’re trying to accomplish—more bedroom space, a home office, better light—and design a dormer that makes sense for your house and your budget.
Once we agree on the design, we handle the permits and approvals. Nassau County has specific requirements, and we make sure everything is filed correctly so there are no surprises later. Then the build starts: we open up the roof, extend the framing outward, install the dormer structure, and tie everything back into your existing roofline. Windows go in, insulation gets installed, and we close it all up weathertight.
Inside, we finish the space—drywall, flooring, trim, whatever’s needed to make it livable. If you’re adding a bathroom or closets, we handle that too. The whole process typically takes a few weeks depending on the size and complexity, but we keep you in the loop the entire time.
You’re left with a finished room that feels like it was always part of the house. No tarps left behind, no half-done corners. Just clean, professional work that adds real square footage to your home.
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A dormer isn’t just cutting a hole in your roof and hoping for the best. It’s a full structural extension that involves framing, roofing, windows, insulation, and interior finish work. We handle all of it.
That means you’re getting a weathertight structure that’s built to Long Island standards—wind, snow load, the works. We install energy-efficient windows that actually open and let air in, not the cheap fixed panels some contractors use. Insulation is done right so your new space isn’t an icebox in winter or an oven in summer. And the exterior matches your existing roofline and siding so it doesn’t look like an afterthought.
Glen Head homes vary—some are cape-style with steep pitches, others are colonials or ranches with different roof configurations. We’ve worked on all of them. Shed dormers are common because they maximize space and headroom. Gable dormers add architectural interest and work well on front-facing roofs where curb appeal matters. We’ll recommend what makes sense for your home, not just what’s easiest for us to build.
If your existing roof needs repair or replacement, we take care of that too as part of the project. You’re not going to install a brand-new dormer on a roof that’s about to fail. Everything gets done right, in the right order, so the finished product lasts.
Dormer costs vary based on size, style, and what’s involved in the build, but most projects in Glen Head range from $20,000 to $60,000. A small shed dormer that adds headroom and a window runs on the lower end. A full-width shed dormer that turns your entire attic into livable space with multiple windows, insulation, and finished interiors will cost more.
Gable dormers tend to be less expensive than shed dormers because they’re smaller, but they also add less usable space. If you’re adding a bathroom, closets, or custom finishes inside the new space, that increases the price. So does your roof’s condition—if we need to replace sections of old roofing or reinforce framing, that’s additional work.
The best way to get an accurate number is to have us come out and look at your specific situation. We’ll measure, assess the structure, talk through what you want, and give you a clear estimate. No surprises, no upselling—just honest numbers based on the actual work involved.
Yes, and often significantly. Adding livable square footage is one of the most reliable ways to increase home value, especially in a market like Glen Head where inventory is tight and buyers are looking for move-in-ready homes with space.
A dormer that converts an attic into a bedroom, office, or bonus room adds functional square footage that appraisers count. That directly impacts your home’s valuation. Beyond the numbers, it also makes your home more appealing to buyers—better light, more room, modern updates. Homes that show well sell faster and for more money.
That said, not every dormer project will return 100% of its cost at resale, and that’s okay. If you’re planning to stay in your home for several years, the value is in how you use the space now—extra room for your family, a dedicated workspace, a guest suite. The resale boost is a bonus. If you’re planning to sell soon, we can talk through what makes the most sense financially and what buyers in Glen Head are actually looking for right now.
Most dormer projects take between three and six weeks, depending on size and complexity. A straightforward shed dormer on a simple roofline with no interior finish work might be done in three weeks. A larger project that includes a full attic conversion, bathroom addition, and custom interior finishes will take closer to six weeks or a bit longer.
Weather can affect the timeline, especially in winter. We’re not working on your roof in a snowstorm or when ice is an issue, because that’s unsafe and leads to poor-quality work. Permit approvals can also add time on the front end, though we handle that process and keep things moving as quickly as possible.
Once we start the actual construction, we work efficiently and keep the job site clean and secure. Your roof won’t be open to the elements for weeks—we get it weathertight fast, then focus on the interior and finish work. We’ll give you a realistic timeline before we start and keep you updated if anything changes. You’ll know what to expect and when.
Yes, dormer construction in Glen Head requires a building permit from the Town of Oyster Bay or Nassau County, depending on your exact location. Dormers are considered structural changes to your home, so they need to meet local building codes for safety, wind load, snow load, and energy efficiency.
We handle the permit process for you. That means preparing the drawings, submitting the applications, coordinating inspections, and making sure everything is approved before we start work. It’s not something you need to worry about or figure out on your own.
Some contractors will suggest skipping permits to save time or money. Don’t do that. Unpermitted work can come back to haunt you when you sell—title companies and buyers’ attorneys will ask for permits during closing, and if you don’t have them, you’re looking at delays, fines, or having to rip out the work entirely. We do it right from the start so you never have that problem. Licensed, insured, and fully permitted—every time.
A shed dormer has a single sloped roof that extends out from your existing roofline, creating a long, wide space inside. It’s the most common type because it maximizes headroom and usable square footage. If you’re trying to turn your attic into a full bedroom or office, a shed dormer usually makes the most sense.
A gable dormer is smaller and has a peaked roof, like a little house sticking out of your main roof. It adds light and some headroom, but not as much space as a shed dormer. Gable dormers are often used on the front of a home for curb appeal or in situations where you just need a window and a bit more height in one area, not a full room conversion.
Which one is right for your home depends on your goals, your roof structure, and your budget. Shed dormers cost more because they’re bigger and involve more materials and labor, but they also give you more usable space. Gable dormers are less expensive and can look great, but they won’t turn your whole attic into a livable floor. We’ll walk you through both options and show you what makes sense for your house and what you’re trying to accomplish.
Yes, and that’s a critical part of the job. A dormer should look like it was always part of your home, not something that was tacked on later. We match your existing roofing material, siding style, trim details, and paint color so everything blends seamlessly.
If your roof is older and the shingles are discontinued, we’ll find the closest match or discuss whether it makes sense to replace a larger section so everything looks consistent. Same with siding—if you have cedar shakes or vinyl in a specific profile, we source the right material. Details matter, especially in Glen Head where homes have distinct architectural styles.
We’ve been doing this long enough to know what works and what doesn’t. A poorly matched dormer stands out and can actually hurt your home’s curb appeal and value. A well-executed dormer that matches your home’s style enhances it. That’s what you’re paying for—craftsmanship and attention to detail, not just a box stuck on your roof.
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