Double dormer costs

Do you want more space and light in your home than a single dormer offers? Then consider a double dormer window, doubling the advantages of a single dormer window. Wondering what would suit your home? Read more about the costs and the various choices involved in this handy article.

What does a double dormer cost?

The cost of a double dormer starts at £ 10,000, including installation. The price difference arises partly from the choice of materials, whether you go for one large dormer or two separate dormers and how you have the dormer installed. See the average costs below.

Price examples

As cheap as possible

Do you want the luxury of a double dormer window, but keep the cost of the dormer low? Then choose one wider prefabricated double dormer made of plastic. Have it installed and do the interior finishing yourself. Costs for this start at £10,000.

Maintenance-free

Do you want a double dormer window that requires as little maintenance as possible? Then choose to have a polyester dormer installed, the double dormer costs on average around £11,000.

Luxurious finishing

Do you want a dormer with extra luxury? Think for example of shutters, a tilt-and-turn window and double glazing, the cost of a wooden double dormer starts at £ 12,000. This will provide your dormer with all the conveniences.

Price structure of a double dormer

What choices will affect the price of your double dormer?

When you have a double dormer installed, the total price depends on a number of choices. We go through some of these choices.

Choice 1: Prefab or traditional

Prefab dormers are assembled in advance. This is done already in the factory. The advantage of a prefabricated dormer is that the dormer is quickly installed. The dormer specialist only has to hoist it onto the roof and finish it off. It is therefore the most frequently chosen dormer in the Netherlands.

Is there no room for a crane in your street? Or is your house older and therefore no longer standing perfectly straight? Then a traditional dormer window may still be preferable. It isbuilt step by step on site and can therefore be positioned more precisely on your roof. The installation takes longer, which makes the dormer more expensive.

Choice 2: Material of the double dormer

The material of the dormer also has a definite influence on the price.

• Wood: A wooden dormer gives an authentic look to your house and is easy to repair, which is why a wooden dormer is often seen on Dutch roofs. A wooden dormer requires annual maintenance.
• Plastic: Plastic is the most commonly chosen material for dormers in the Netherlands. This is due to its inexpensive price and low-maintenance material. Handy, since you cannot easily access the outside of your dormer.
• Polyester: A polyester dormer is the most durable dormer and is maintenance-free. Because the dormer is made of durable and maintenance-free material, the price is higher than for a dormer made of wood or plastic.

Choice 3: Mounting of the double dormer

With a double dormer, you have 3 options for the mounting:

• Next to each other: This is the most frequently chosen option. This gives you many windows side by side, which not only creates more space and light, but also enjoys a beautiful wide view. Ideal for a bedroom, workspace or if you have two rooms next to each other, for both.
• A creative idea with double dormers is to place the dormers on top of each other. This creates a lot of light and space on several floors at once. However, professionals should check carefully whether this is possible and whether a permit is needed.
• Rectangular dormers: Planning to install a double dormer in the attic? Then consider placing them ‘opposite’ to each other, so to speak. This allows a lot of light in from two sides and gives you more space on two sides of the room.

Choice 4: Additional options

When choosing double dormers, there are additional options that allow you to increase your living comfort.