Costs of a wooden dormer
Wood is the traditional material for dormers. In protected cityscapes, historic neighbourhoods and with classic homes, wood is often required by the aesthetic review (welstand). The appearance is warmer than plastic and repairing it is easier. On the other hand, wood requires periodic painting and initially costs more than plastic. On this page, we explain what makes a wooden dormer different — in terms of costs, maintenance, and lifespan.
We don't quote rates — we explain how the price is structured.
When do you choose wood?
Wood is logical in these situations:
- Protected cityscape or monument where aesthetic review (welstand) rejects plastic.
- Historic neighbourhood with predominantly wooden facades and window frames.
- Existing wooden dormer that is being replaced — aesthetic continuity.
- Preference for traditional appearance — warmer than plastic.
For modern new-build neighbourhoods without aesthetic review requirements, the choice between wood and plastic is mainly personal. Wood requires a commitment to maintenance; plastic is "forget and enjoy".
What determines the price?
Wood type
Spruce (painted) is economical but requires more maintenance. Meranti is more durable and standard for window frames. Accoya is durability class 1 and lasts a very long time — but is significantly more expensive.
Paint system
Stain is economical and repairable. Opaque paint gives a sleeker look but requires professional application. Industrial coating (by factory) has the longest recoating interval.
Detailing
Good detailing around connections prevents rot. Lead flashing, drip profiles and sealant in the right places are the distinguishing details between a dormer that lasts 30 years and one that needs to be renovated after 12 years.
Window frames
With a wooden dormer, the window frames are also often wood. Count on a higher window frame price than plastic.
Maintenance: what do you need to do?
Painting is not an option but a fixed part of the lifespan:
- Year 1–2 after installation: visual inspection, sealant and connections.
- Year 6–10: first touch-up paint job (light sanding + opaque layer).
- Year 12–18: complete repaint.
- Year 25–30: thorough maintenance or partial renovation.
Count on an average of one repaint every 7 years. A professionally painted dormer with good detailing can last 40 years — if poorly maintained, wood starts to rot within 10 years.
Total long-term costs
Wood is more expensive to purchase than plastic, but the long-term picture is nuanced:
- Paint maintenance is a recurring expense (every 7–10 years).
- Repair is cheaper than plastic — you fix a local problem locally.
- Residual value is higher with good maintenance; it never looks like "aged plastic".
Calculate the TCO (total cost of ownership) for 30 years for yourself: purchase + 3 repaints. That gives a fairer picture than the purchase price alone.
Common mistakes with wooden dormers
- Cheap spruce dormer without a durability class — rots within 10–15 years with inadequate maintenance.
- Postponing painting — small damages become large ones.
- Poor connection details around the roof surface and side walls — water slowly penetrates.
- Wrong paint system — alkyd paint under water-based paint peels off.
- No ventilation behind the cladding — moisture lingers.
Comparison table
| Aspect | Wood | Plastic |
|---|---|---|
| Purchase price | Higher | Lower |
| Maintenance | Painting every 7–10 years | Virtually zero |
| Repair | Locally possible | Replacing the entire panel |
| Aesthetic review (welstand) | Historic neighbourhoods: often required | Sometimes rejected |
| Appearance | Warmer, more classic | Sleeker, more modern |
| TCO 30 years | Higher with maintenance | Lower |
Frequently asked questions
Short, honest answers to recurring questions.
- How much does a wooden dormer cost?
- We do not mention rates. Wood is initially more expensive than plastic; the type of wood, paint system, and detailing strongly determine the price.
- How often do I need to paint?
- Count on a touch-up every 6–10 years and a complete repaint every 12–18 years.
- Which type of wood is best?
- Meranti is common. Accoya is more expensive but durability class 1 — very long lifespan.
- Is wood mandatory in a protected cityscape?
- Often yes, or strict aesthetic review (welstand) requirements apply that plastic does not meet.
- How long does a well-maintained wooden dormer last?
- 30–40 years with correct maintenance.
- Can I paint it myself?
- Yes, provided you use the right paint system and at the right times. Professional work yields better long-term results.
- Is wood more sustainable than plastic?
- At the end of its lifespan, yes: wood is bio-based and recyclable. The purchase is energetically comparable.
- What if the aesthetic review (welstand) rejects plastic?
- Then wood, zinc or Trespa wood-imitation (structured) are options.
- Can I clad a wooden dormer with plastic later?
- Technically possible but rarely beautiful; a better option is to have the wood professionally painted.
- Is a wooden window frame also required?
- Not always; sometimes a plastic window frame with wood-grain foil is permitted. Ask the aesthetic review (welstand) about this.
Summary
Wood is the classic choice and often mandatory in protected areas. Initially more expensive than plastic, but repairing is cheaper and the appearance remains "fitting" for longer. Count on a repaint every 7–10 years; view the total costs over 30 years instead of just the purchase price. In every quote, ask for the type of wood (Meranti / Accoya), paint system, and warranty on detailing around connections.