Dormer permits: front vs back of the house
Short answer
In Dutch practice, a back-facing dormer can often be built permit-free if it stays within the size, height and edge-distance rules. A front-facing dormer almost always needs an environmental permit and a sign-off from the aesthetics committee (welstand), because it changes the street view.
Why the two sides are treated differently
Permit rules try to balance two things: your right to extend your home, and the public's interest in how streets look and how neighbours are affected. The front of the house touches the first interest (street view) directly, so it carries more rules. The back is mostly about impact on neighbours, which is governed by size limits.
Side by side
| Aspect | Back of the house | Front of the house |
|---|---|---|
| Permit-free option | Possible within size rules | Almost never |
| Welstand (aesthetics) | Usually not required | Almost always required |
| Typical timeline | 1–2 weeks intake check | 8–14 weeks application |
| Cost in fees | €0 if permit-free | €300–€900 application + advice |
| Neighbour notification | Optional but advised | Part of the application |
On the front of the house
Expect a full application: drawings, photos of the street, a description of materials and colours, and an aesthetics check. Picking a design that echoes the neighbours' dormers (size, proportions, colour) is the single biggest factor in a smooth approval.
On the back of the house
If you stay within the published rules — height under 1.75 m, edge distances, set-back from the gutter — the build can usually start without an application. Even so, it is worth submitting a short intake check so the municipality confirms in writing that no permit is needed.