You’re not just adding space. You’re opening up dark, cramped areas with natural light and ventilation that make rooms feel twice their size.
A dormer gives you functional square footage where you actually need it—an extra bedroom for kids home from college, a real office instead of a corner desk, or a master suite that doesn’t feel like an afterthought. On Long Island, where property values in Old Westbury average $2 million, a well-executed dormer can return 40-60% of your investment when it’s time to sell.
The difference shows up immediately. Brighter mornings, better airflow, and rooms that finally work the way you need them to. No foundation work, no losing yard space, and no months-long disruption to your daily routine.
We’ve been handling dormer construction and home additions across Nassau County since the early 1970s. We’re not a crew that shows up, disappears for weeks, then resurfaces when it’s convenient.
Ray is on-site daily. You’ll see him working, not just managing from a truck. When you call, someone answers—before the job starts, during construction, and after we’re done.
Old Westbury homeowners expect quality work and straight answers. We’ve built our reputation here by doing both, consistently, for over five decades. Clean job sites, professional crews, and projects that finish on time without the runaround.
We start with a consultation at your home to assess your roof structure, discuss what you’re trying to accomplish, and determine whether a shed dormer, gable dormer, or another style makes the most sense. Not every attic can support every type of dormer, so this step matters.
Once we agree on the design and scope, we handle the structural work—roof framing, window installation, insulation, and exterior finishing that matches your existing roofline. Interior work follows: drywall, flooring, electrical, and any finish carpentry needed to make the space livable.
Throughout the project, we keep the site clean and stay in communication. You’ll know what’s happening each day, and if something comes up—weather delays, material lead times, structural surprises—we’ll tell you immediately, not three weeks later. Most dormer projects take several weeks depending on size and complexity, but you won’t be left guessing where things stand.
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Long Island winters are tough on roofs. Frozen pipes, ice dams, and snow load all put stress on dormer structures, especially if they weren’t built right the first time. We use proper flashing, ventilation, and insulation to prevent the leaks and drafts that show up a year after a rushed job.
In Old Westbury, where homes often feature traditional architecture and strict aesthetic standards, your dormer needs to blend seamlessly with your existing roofline. We match materials, angles, and finishes so the addition looks original, not tacked on.
Whether you’re adding a full shed dormer across the back of your home or a smaller gable dormer for a single room, the construction process is the same: structural integrity first, then weatherproofing, then finishing. We don’t skip steps to save time, because that’s how you end up with callbacks and problems down the road.
Dormer installation on Long Island typically runs $188+ per square foot, though your actual cost depends on the size, style, and complexity of the project. A small gable dormer adding 60-80 square feet will cost significantly less than a full shed dormer that spans the length of your home.
Old Westbury projects often involve higher-end finishes and materials that match the existing home’s architecture, which can increase costs compared to standard construction. Structural considerations matter too—if your roof framing needs reinforcement or if we’re working around complex rooflines, that adds labor and materials.
We provide detailed estimates after assessing your home in person. You’ll know exactly what you’re paying for and why, with no surprise charges halfway through the job.
Most dormer projects in Old Westbury require building permits because you’re altering the roof structure and adding living space. The permit process involves submitting plans, passing inspections at various stages, and ensuring the work meets local building codes.
We handle permit applications and coordinate inspections so you don’t have to navigate the process yourself. Nassau County has specific requirements for structural work, and Old Westbury may have additional regulations depending on your property’s zoning and any homeowner association rules.
Some smaller dormer repairs or roof extensions might not trigger permit requirements, but that’s determined on a case-by-case basis. We’ll tell you upfront what’s needed and factor permit timelines into the project schedule.
A typical dormer installation takes 3-6 weeks from start to finish, depending on the project’s size and scope. Smaller gable dormers on straightforward rooflines move faster than full shed dormers that require extensive structural work and interior finishing.
Weather plays a role, especially during Long Island winters when snow and freezing temperatures can delay roofing work. We don’t rush through exterior work in bad conditions because that’s how leaks and structural problems develop.
You’ll have a realistic timeline before we start, and we’ll update you if anything changes. Most of the disruptive work—roof opening, framing, weatherproofing—happens in the first week or two. After that, it’s interior finishing, which is less invasive to your daily routine.
A shed dormer runs horizontally along your roofline with a single sloped roof, creating maximum interior space and headroom. It’s the best option when you need significant square footage—like converting an entire attic into a master suite or multiple rooms.
A gable dormer projects outward from the roof with a peaked, triangular front, adding vertical space and windows without extending the full length of the roof. Gable dormers work well for adding light and limited space to specific areas, like a small bedroom or bathroom.
Shed dormers provide more usable square footage but change your home’s profile more noticeably. Gable dormers are less dramatic visually and often blend better with traditional architecture common in Old Westbury. The right choice depends on how much space you need and how the addition will look on your specific home.
Dormer additions typically return 40-60% of the project cost in increased home value, with some reaching 70-80% depending on the quality of work and local market conditions. In Old Westbury, where median property values exceed $2 million, adding functional living space appeals to buyers looking for move-in-ready homes.
The return on investment improves when the dormer is well-designed, properly executed, and matches your home’s existing style. Buyers pay more for additional bedrooms, updated bathrooms, and natural light—all common outcomes of dormer projects.
Beyond resale value, you get immediate use of the space. If you’re staying in your home for years, the value isn’t just financial—it’s having the room you need without the cost and hassle of moving.
Not every roof can support a dormer, but most can with the right structural modifications. The key factors are your existing roof pitch, attic space, and framing structure. Steeper roofs generally accommodate dormers more easily than low-slope roofs.
We assess your roof during the initial consultation to determine what’s structurally feasible. Some homes need additional support beams or reinforced framing before dormer construction can begin. Others have attic layouts that make certain dormer styles impractical or too expensive relative to the space gained.
If your roof can’t support a traditional dormer, we’ll tell you upfront and discuss alternatives. There’s no point designing a project that won’t work or that creates structural problems years down the road.
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