Your home already sits on the property you want. The location works. The neighborhood fits. But you’re running out of space, and moving means starting over in a market where inventory is tight and prices keep climbing.
A dormer gives you the square footage you need without the hassle of relocating. You’re adding a bedroom for a growing family, creating a home office that actually has a door, or finally getting that master bathroom you’ve been planning. The attic space is already there—it just needs headroom and light.
The right dormer doesn’t look like an add-on. It matches your roofline, your siding, and the architectural style of your home. When it’s done well, it looks original. And in Old Brookville, where homes reflect a certain standard, that matters. You’re not just adding space—you’re increasing your property value and improving how your home functions day to day.
We’ve been handling large-scale renovations across Nassau County for over five decades. We specialize in projects like dormers, extensions, and full-floor remodels—work that requires structural knowledge, design sense, and the ability to manage a job from start to finish.
We’re not a crew that shows up when it’s convenient. You’ll get someone on the phone when you call, and if something goes wrong at 3 a.m.—frozen pipe, roof leak, whatever—we respond. Our job sites stay clean, our crews stay professional, and we keep you informed through every phase.
Old Brookville has specific expectations when it comes to home improvement. The homes here are high-end, the lots are large, and the work needs to be done right. We understand that, and we’ve built our reputation on it.
First, we walk through your attic and talk about what you’re trying to accomplish. We measure the space, assess the roof structure, and discuss dormer styles—shed, gable, or a custom design that matches your home. You’ll know upfront what’s possible and what it’s going to cost.
Once the design is set, we handle the structural work. That means cutting into the roof, framing the dormer, and making sure everything is weathertight before we move inside. We install windows, insulation, drywall, and flooring. If you’re adding a bathroom, we run the plumbing. If it’s a bedroom, we make sure the electrical and HVAC are properly integrated.
Throughout the project, we keep the site clean and stay in communication. You’re not guessing where things stand. And when we’re done, the space is finished and functional—ready to use the day we hand it over.
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A dormer project isn’t just about framing and a roof. You’re getting a fully finished room, which means we’re handling the structural work, exterior finishes, insulation, drywall, flooring, electrical, and any plumbing if you’re adding a bathroom. We match your existing siding and roofing materials so the addition blends in.
In Old Brookville, where homes often sit on multi-acre lots with strict aesthetic standards, the exterior finish matters as much as the interior function. We source materials that match your home’s current look—whether that’s cedar shakes, vinyl siding, or custom trim work. The goal is to make the dormer look like it was part of the original build.
On Long Island, winter weather is a real factor. We account for snow load, ice damming, and insulation requirements that keep your new space comfortable year-round. That means proper ventilation, quality insulation, and weatherproofing that holds up when temperatures drop. You’re not just getting more space—you’re getting space that works in every season.
For a standard dormer adding around 150 to 200 square feet, you’re typically looking at $15,000 to $40,000, depending on the size, style, and finishes you choose. Shed dormers tend to be more affordable because they’re simpler to frame and require less roofing work. Gable dormers cost more due to the additional structural complexity and custom trim.
The price also depends on what you’re finishing inside. If you’re adding a bathroom with plumbing and tile work, that’s going to cost more than a simple bedroom or office space. Custom windows, higher-end flooring, or matching intricate exterior details will also affect the final number.
We give you a clear estimate upfront so you know what you’re spending and what’s included. No surprises halfway through the job.
In most cases, yes—dormer additions typically require a building permit in Nassau County because you’re altering the roofline and adding structural elements. The permit process involves submitting plans, getting approval, and scheduling inspections at key stages of the project.
That said, we handle permit coordination as part of the job. We know what the local building department requires, and we make sure the plans meet code before we start. You’re not dealing with the paperwork or the back-and-forth—we take care of that.
There are some smaller projects that don’t require permits, and if your job falls into that category, we’ll let you know. But for most dormer installations, especially in Old Brookville where homes are larger and standards are high, permits are part of the process.
Most dormer projects take four to eight weeks from start to finish, depending on the size and complexity. A simple shed dormer with basic finishes will be on the shorter end. A larger gable dormer with a full bathroom, custom windows, and detailed exterior work will take longer.
Weather can affect the timeline, especially during the winter months on Long Island. We work year-round, but snow, ice, and freezing temperatures can slow down exterior work. We plan around that and keep you updated if conditions cause delays.
The goal is to get the job done right, not fast. We’re not rushing through framing or cutting corners on weatherproofing. You’re getting a finished space that’s built to last, and that takes the time it takes.
Yes, if it’s done correctly. A dormer should look like it’s always been part of your home, not something that was tacked on later. That means matching the roofline, siding, trim, and window style to what’s already there.
We source materials that match your existing exterior—whether that’s specific siding profiles, roofing shingles, or custom trim details. In Old Brookville, where homes range from traditional colonials to more contemporary designs, the dormer needs to fit the architectural style. We take the time to get that right.
The design phase is where this happens. We walk through options, show you what different dormer styles look like on homes similar to yours, and make sure you’re confident in the plan before we start building.
Absolutely. Adding a bathroom is one of the most common reasons people build dormers—especially in homes where the master bedroom is on the second floor and there’s no en-suite. You’re creating a private bathroom without taking space from existing bedrooms.
The dormer gives you the headroom and square footage you need for a shower, toilet, vanity, and proper ventilation. We run the plumbing from the existing system, install the fixtures, and finish the space with tile, flooring, and lighting. It’s a full bathroom, not a cramped afterthought.
In terms of layout, we make sure the bathroom is functional and meets code. That means proper drainage, ventilation, and clearances around fixtures. You’re getting a space that works well and adds real value to your home.
A shed dormer has a single sloped roof that extends from the existing roofline. It’s the most common type because it maximizes interior space and costs less to build. You get more headroom and usable square footage, which is why it’s popular for bedrooms and bathrooms.
A gable dormer has a peaked roof and projects out from the main roofline. It’s more architectural and adds curb appeal, but it doesn’t create as much interior space as a shed dormer. Gable dormers are often used for aesthetic balance or when you want the addition to stand out as a design feature.
The choice depends on what you’re trying to accomplish. If you need maximum space, a shed dormer makes sense. If you’re focused on exterior appearance and architectural detail, a gable dormer might be the better fit. We walk through both options and help you decide based on your home’s style and your functional needs.
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