A 1980s terraced house in Zwolle-Holtenbroek received a spacious dormer at the front. The property fell within the permit-free dimensions, so the drawings could be used directly by the manufacturer. Within 4 weeks the dormer was in place.
Illustrative blueprint view · existing situation, dimension check permit-free, dimensioned drawing of the dormer and final result.
The owners of the property in Holtenbroek had an attic room that was barely usable: the ceiling started at just 1.4 metres and there was only one roof window for light. The room was used as a storage room, but the aim was a proper children's bedroom. The municipality of Zwolle applies strict dimensions for permit-free dormers on front roof surfaces, which left limited margin.
We carefully verified the Zwolle conditions for permit-free dormers on front roofs: width maximum 4.6 metres, height maximum 1.5 metres and at least 0.5 metres behind the ridge. By designing the dormer to exactly the maximum dimensions, we achieved the optimal result within the permit-free framework. The drawings contained all the dimensions the prefab manufacturer needed for direct production.
After fitting the dormer, the attic room gained 6 m² of extra usable floor area and a standing height of 2.1 metres in the central section. Three large window sections provide ample daylight. Because the dormer was permit-free, no application had to be submitted and the contractor could start immediately. The total lead time from commission to installation was 4 weeks.
Key project details
What we delivered
Whether you live in Zwolle, Overijssel or anywhere else in the Netherlands: we check the permit-free dimensions, draw up the dormer and deliver the complete file. Since 2016, 800+ projects. A no-obligation quote within 1 working day.