You’re not looking to move. You like your neighborhood, your commute, your schools. But you need another bedroom, a real bathroom upstairs, or an office that isn’t the dining room table.
A dormer gives you that space by going up instead of out. No foundation work. No eating up your yard. Just usable square footage where your attic used to sit empty.
And it’s not just about the room itself. Dormers bring in natural light that makes the whole upstairs feel different. They add architectural interest to your roofline. They can increase your home’s value by up to 22%, which matters whether you’re staying long-term or thinking five years down the road.
On Long Island, where median home prices in Nassau County are over $800,000, adding functional space to what you already own makes more sense than buying bigger. Especially when you factor in closing costs, moving expenses, and the reality that there’s not much inventory out there anyway.
We’ve been handling dormers, additions, and full-scale renovations across Long Island for over 50 years. We’re not a crew that shows up, makes a mess, and disappears for weeks. Ray’s on-site every day, actually working—not just managing.
More than 60% of our work comes from referrals. People call us back for second and third projects. That doesn’t happen unless you answer the phone, show up when you say you will, and leave the job site clean at the end of the day.
We’ve worked in Manorhaven long enough to know the permit process, the local building codes, and what it takes to get a dormer project done right in a neighborhood where homes are close together and curb appeal matters. You’re not our first rodeo, and we’re not learning on your roof.
First, we walk through what you’re trying to accomplish. Do you need a full bathroom upstairs? A bedroom for a kid or a guest? Office space that actually has a door? That shapes everything—size, style, placement.
Then we handle the design and permits. On Long Island, permits can take time, so we start that process early. We pull what’s needed, coordinate inspections, and make sure everything’s documented. If you ever sell, that paper trail matters.
Once we’re cleared to build, we start with the roof. We cut the opening, frame the dormer structure, and tie it into your existing roofline. Then comes sheathing, roofing, windows, insulation, and interior finishes. If you’re adding a bathroom, we run plumbing. If it’s a bedroom, we make sure electrical and HVAC are handled.
The whole process typically takes 4 to 12 weeks depending on size and scope. Weather can slow things down—this is Long Island, after all. But we keep you updated, and we don’t leave your house open to the elements. Every day, we clean up. Every step, we’re there.
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Shed dormers are the most common. They run along the back or side of your roofline and give you the most usable square footage. If you want a full bedroom or bathroom, this is usually the way to go.
Gable dormers are smaller and add targeted space—perfect for a window seat, a closet, or just bringing light into a specific area. They also add more visual interest to your roofline, which matters in neighborhoods like Manorhaven where curb appeal counts.
Hip dormers are less common but work well on certain roof styles. They’re a bit more complex to build, but they blend into the existing structure in a way that feels original to the house.
In Manorhaven and across Nassau County, lot sizes are tight and zoning can be restrictive. A dormer lets you add space without increasing your home’s footprint, which keeps you compliant and keeps your yard intact. And because home values here are high, the return on investment is real. You’re not just getting more space—you’re protecting and growing what’s likely your biggest asset.
Dormer costs depend on size and what you’re building inside. A small dormer that’s mostly for light and a little storage might run $10,000 to $15,000. A larger dormer that adds a full bedroom or bathroom typically falls between $25,000 and $50,000.
That range accounts for framing, roofing, windows, insulation, drywall, and finishes. If you’re adding plumbing for a bathroom or upgrading electrical and HVAC, that adds to the total. We walk you through all of it upfront so there’s no surprise math later.
One thing that helps: if you’re already planning to replace your roof, adding a dormer at the same time saves money. You’re already paying for labor and scaffolding, so the overlap cuts costs. It’s worth thinking about timing if your roof is near the end of its life anyway.
Yes. Any structural work that changes your roofline or adds living space requires a permit in Manorhaven and across Nassau County. That includes dormers.
We handle the permit process for you. We submit the plans, coordinate with the building department, and schedule inspections. It’s not complicated, but it does take time—sometimes a few weeks depending on the backlog. That’s why we start early.
Skipping permits is a bad idea. It can hold up a future sale, show up during a title search, or cause issues with your homeowner’s insurance. It’s not worth the risk. We do it right from the start so you don’t have to worry about it five years from now when you’re trying to close on a buyer.
Most dormer projects take between 4 and 12 weeks. Smaller dormers that don’t involve plumbing or major interior work can be done in a month. Larger projects with full bathrooms, electrical upgrades, or custom finishes take closer to three months.
Permitting is usually the longest part of the timeline. Once we’re approved and start construction, the work moves steadily. Weather can cause delays—especially in winter or during heavy rain—but we plan around it and keep you in the loop.
We’re on-site every day, so if something comes up, we handle it. If we find rotted rafters or need to add structural reinforcement, we don’t wait two weeks to tell you. We address it, explain what’s needed, and keep moving. You won’t be left wondering what’s happening with your house.
Yes. Adding a dormer can increase your home’s value by up to 22%, especially if it creates a new bedroom or bathroom. In Nassau County, where home prices are high and inventory is tight, functional square footage is worth real money.
Buyers care about bedroom and bathroom count. If you’re turning a two-bedroom Cape into a three-bedroom, or adding a second full bath, that moves the needle. It also makes your home more competitive if you ever decide to sell.
Even if you’re not selling anytime soon, the value is in how you use the space. A home office, a guest room, a primary suite with an actual bathroom—these things improve your day-to-day life. The financial return is a bonus, but the real return is not having to move to get what you need.
A shed dormer runs horizontally along your roofline and creates the most usable interior space. The roof slopes in one direction, and the walls are typically tall enough to stand in. If you’re adding a bedroom, bathroom, or office, a shed dormer is usually the best option.
A gable dormer is smaller and projects out from the roof with a peaked front. It’s great for adding a window, a reading nook, or a small closet. It doesn’t give you as much square footage, but it adds character to your roofline and brings in natural light.
Which one makes sense depends on what you’re trying to accomplish. If you need functional living space, go with a shed dormer. If you want light, ventilation, and curb appeal without a full room, a gable dormer works. We’ll walk through your options based on your roof structure, your goals, and what fits your home’s style.
Absolutely. That’s one of the main reasons people build dormers. A dormer gives you the ceiling height and floor space to add a real bedroom or a full bathroom upstairs—something most unfinished attics can’t support.
If you’re adding a bathroom, we run the plumbing, install proper ventilation, and make sure everything’s up to code. If it’s a bedroom, we handle electrical, HVAC, egress windows, and insulation so the space is comfortable year-round.
The key is planning it right from the start. We don’t just frame a box and hope it works. We design the dormer around what’s going inside it, so the layout makes sense and the mechanicals are where they need to be. You end up with a finished space that feels like it was always part of the house—not an awkward add-on.
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