You’re not looking to move. The schools are good, your neighbors are familiar, and frankly, everything else on the market is either overpriced or too far from where you want to be. But your house feels tight—especially upstairs where the ceiling slopes and the natural light barely reaches.
A dormer changes that. It adds headroom where you’re currently ducking. It brings in natural light that makes the space feel twice as large. And it creates actual living area—a bedroom, an office, a studio—without touching your yard or dealing with a full addition.
Most dormer projects around here return 40 to 50 percent of the investment when you sell. But the real value is what it does now: it lets you stay in the home and neighborhood you already love, with the space your family actually needs. No packing boxes. No bidding wars. Just more room where it counts.
Ray Coleman Home Improvement has been handling large-scale projects across Nassau County for over 40 years. We’re not a crew that shows up, disappears for two weeks, then resurfaces when it’s convenient. We answer the phone. We respond to texts. And if something goes wrong—frozen pipe, emergency repair, whatever—we’re there.
Most of our work comes from kitchens, bathrooms, first-floor renovations, and dormers. We know Long Island homes inside and out: the Cape Cods with low attic ceilings, the Colonials that need more bedroom space, the older builds with quirky framing that requires real carpentry experience. We also know the permit process in Malverne, the inspection timelines, and how to keep a project moving without surprises.
You’re hiring someone who’s going to be on-site, managing the job, and making sure it’s done right. That’s how we’ve stayed in business this long.
First, we come out and look at your roof structure, your attic framing, and what you’re trying to accomplish. Not every house can support every type of dormer, so we’ll tell you what’s realistic based on your home’s bones and your budget. If permits are required—and in Malverne, they usually are—we handle that process so you’re not stuck chasing down paperwork at Town Hall.
Once permits are approved, we schedule the work. Most dormer installations take four to eight weeks depending on size and complexity. We’ll open up the roof, frame the dormer, tie it into your existing structure, and make sure everything is weathertight before we move inside. Then comes insulation, drywall, windows, and whatever finishes you’ve chosen.
Throughout the project, the job site stays clean and our crew stays professional. You’ll know what’s happening and when. And if something changes—weather delay, material backorder, structural surprise—you’ll hear about it right away, not two weeks later. When we’re done, you’ll have a finished space that feels like it was always part of the house, plus closed permits and a final inspection that clears the title if you ever sell.
Ready to get started?
A dormer isn’t just a roof bump. It’s a structural extension that requires real carpentry, proper flashing, insulation that meets current code, and windows that actually seal. We handle all of it—framing, roofing, siding to match your existing exterior, interior finishes, electrical if you’re adding outlets or lighting, and ventilation so the new space doesn’t turn into a hotbox in July.
In Malverne and across Nassau County, construction costs run higher than most of Long Island due to labor rates and material availability. A typical dormer project here ranges from $15,000 to $50,000 depending on size, style, and finishes. Shed dormers are usually the most cost-effective if you’re trying to maximize square footage. Gable dormers add more architectural interest and work well on Colonial or Cape Cod-style homes.
We also do dormer repairs—flashing leaks, rotted framing, window replacements—for older dormers that weren’t built right the first time. If you’re dealing with water damage or drafts from a poorly installed dormer, we can assess what needs fixing and whether a repair or rebuild makes more sense. Either way, you’ll know the real cost and timeline before we start.
Most dormer projects in Malverne and Nassau County run between $15,000 and $50,000. The range depends on the type of dormer, the size, and what finishes you choose. A small shed dormer that adds headroom and a window will cost less than a full gable dormer with a bathroom build-out.
Nassau County construction costs tend to run higher than other parts of Long Island because of labor rates, permit fees, and material costs. If your project requires structural reinforcement—like sistering joists or adding support beams—that’ll add to the budget. Same goes for matching siding or roofing materials that are hard to source.
We’ll give you a clear estimate after we see your house and understand what you’re trying to do. No guessing, no range so wide it’s meaningless. Just a real number based on the actual work.
Yes. Any structural work that changes your roofline or adds living space requires a building permit in Malverne. That includes dormers, roof extensions, and attic conversions. The permit process involves submitting plans, getting approval from the building department, and scheduling inspections at different stages of the project.
Permits aren’t optional, and they’re not just bureaucratic hassle. If you ever sell your home, the title search will flag any open or unpulled permits. Most attorneys won’t close until those are resolved, which means you’ll be paying to fix it later anyway—usually at a higher cost and with delays that kill your sale.
We handle the permit process as part of the project. We know what the Town of Hempstead requires, how long approvals typically take, and how to avoid the common mistakes that slow things down. You won’t be making trips to Town Hall or waiting weeks because something was filled out wrong.
Most dormer projects take between four and eight weeks from start to finish. Smaller shed dormers on straightforward roof structures can move faster. Larger gable dormers with interior build-outs—like adding a bathroom or finishing a bedroom—take longer.
The timeline also depends on permits, inspections, and weather. On Long Island, winter weather can delay roofing work, and permit backlogs can push your start date if you’re trying to begin during peak construction season. We’ll give you a realistic schedule based on your specific project and the time of year.
Once we start, we don’t disappear for days at a time. Our crew stays on the job, and we keep the site weathertight so you’re not dealing with tarps and leaks for weeks. You’ll know what’s happening, when the inspections are scheduled, and when we expect to finish.
Most dormers return 40 to 50 percent of the project cost when you sell. If you spend $20,000 on a dormer, you can expect to see $8,000 to $10,000 of that reflected in your home’s sale price. In some cases, especially in markets like Malverne where homes sell for a median of $778,000, adding functional living space can increase your property value by as much as 22 percent if the dormer creates a full bedroom or bathroom.
But the bigger value isn’t always resale. It’s being able to stay in your home and neighborhood without moving. If you’re looking at bigger houses in the area, you’re either paying a premium, compromising on location, or both. A dormer gives you the space you need now, without the cost and hassle of relocating.
The ROI also depends on how well the dormer is built and whether it matches your home’s style. A poorly designed dormer that looks tacked on won’t add much value. A well-executed dormer that blends with your roofline and adds real living space will.
A shed dormer has a single sloped roof that extends from your existing roofline. It’s the most cost-effective option if you’re trying to maximize interior space, and it works well on Cape Cod or ranch-style homes where you need more headroom across a wide area. Shed dormers are common on Long Island because they add the most usable square footage for the cost.
A gable dormer has a peaked roof and projects out from the main roofline. It adds less interior space than a shed dormer, but it creates more architectural interest and works well on Colonial-style homes. Gable dormers are often used when you want to add a window for light and ventilation without doing a full attic conversion.
The right choice depends on your home’s style, your budget, and what you’re trying to accomplish. If you need a full bedroom or office with standing room, a shed dormer usually makes more sense. If you’re adding a bathroom or just want more natural light in an existing attic space, a gable dormer might be enough. We’ll walk you through both options and show you what works for your house.
Yes. Most people add dormers specifically to create a bedroom, bathroom, office, or studio. Once the dormer is framed and finished, the interior space is treated like any other room in your house. That means you can add electrical, plumbing, HVAC, and whatever finishes you want.
Adding a bathroom requires running plumbing and venting, which can get complicated depending on where your existing plumbing is located. If your attic is directly above a bathroom or kitchen, it’s easier. If not, we’ll need to run new lines, which adds cost and complexity. Same goes for HVAC—if you’re finishing the space as a bedroom, you’ll need heating and cooling, which might mean extending ductwork or adding a mini-split system.
We handle all of that as part of the project. You’re not coordinating five different subcontractors or trying to figure out who’s responsible for what. We manage the whole job from framing to final finishes, so the space is livable and legal when we’re done.
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