Dormer window
Complete installation including permit and finishing touches.
Choose from wood, uPVC, and custom-made solutions.
Quick installation with minimal disruption.
Sustainably built, low-maintenance, and highly insulating.
More space, more light, and more value with craftsmanship by Arslan Group.
Looking to create more space, light, and comfort in your home? Arslan Group designs and builds custom dormer windows for homes in Rotterdam, Haarlem, and the surrounding areas. From initial advice and design to installation and finishing, we manage your dormer project from start to finish.
Why choose a dormer from Arslan Group?
A single point of contact
We handle everything from construction to finishing touches, with no middlemen.
Quality and safety
We build in accordance with all structural regulations and insulation standards.
Sustainable materials
Our dormer windows are energy-efficient and low-maintenance.
Tight schedule
Installed within one business day for standard models.
Recently installed dormers
Explore examples of our completed dormer installations on homes across the country. Each project showcases how we combine functionality with aesthetics, focusing on detail, insulation, and a seamless fit with the roof.
Expand your home with a dormer window from Arslan Group
A dormer window is the smartest way to create extra space and light without a full-scale renovation. At Arslan Group, we provide a durable solution that seamlessly blends with the style of your home. We manage the entire process—from permits and structural calculations to installation and finishing—so you don't have to worry about a thing.
Our experienced craftsmen guarantee a perfect finish, optimal insulation, and a sleek design that boosts your property's value. Thanks to our efficient working method, many dormers can be installed in just one day. This allows you to quickly enjoy more comfort, space, and natural light—all with the peace of mind of working with one reliable contractor.
With a single partner managing everything: build smarter, faster, and with confidence
Fair pricing, no surprises
Upfront, you will receive a clear quote covering everything: labor, materials, and pricing. Any changes during the project are always discussed with you first, including any extra costs and timeline adjustments. This way, there are no unpleasant surprises afterwards.
A dedicated project manager as your single point of contact
You will be assigned a dedicated project manager who will oversee your project from start to finish. They will know all the details, coordinate with the teams, and answer all your questions—so you always know exactly who to contact.
Tight scheduling, clear progress
We plan the project step-by-step and agree on clear schedules for both start and completion. We keep you in the loop with transparent updates on our progress and the next steps. This guarantees peace of mind and a clear overview.
Guaranteed support, now and in the future
We won't leave you hanging after completion: you get a full warranty on all work, and we offer maintenance contracts. This keeps your building, home, or interior in top condition, giving you one trusted partner who handles everything for you, both now and in the future.
Answers to all your questions
Frequently Asked Questions
Can't find your question?
Please feel free to get in touch with us
Do I need a permit for a dormer window?
That depends on the location and the type of dormer window. Building at the back of the house is often permit-free, but the front usually requires one. We will assess your situation, check local council regulations, and let you know exactly what is needed. If a permit is required, we can also assist with the application, saving you the hassle of figuring it all out.
How much does a dormer loft conversion cost, and are there any hidden fees later on?
Is a dormer window well-insulated and maintenance-free?
How long does installation take and how much disruption should I expect?
