A 1930s house within a protected townscape received a full extra storey. We handled the design, structural engineering and building permit. Passed aesthetic review first time; permit issued in 7 weeks.
Illustrative blueprint view · existing situation, permit sketch, 3D impression and the delivered result.
The owners of a 1930s house in Haarlem-Noord had an attic with insufficient headroom for a proper bedroom floor. The property lies within a protected townscape, with a recognisable roofline and a strict aesthetic policy. A roof extension therefore had to add space without disrupting the streetscape. In addition, the existing timber roof structure had not been calculated for an additional storey.
We designed a roof extension that respects the original ridge direction and roof pitch, with a facade layout and materials that match the 1930s architecture. We coordinated the design in advance with the Heritage department of the municipality of Haarlem. The structure was fully calculated: a new steel and timber frame carrying the additional storey and connecting cleanly to the existing load-bearing walls.
The building permit passed the aesthetic review committee first time and was completed within 7 weeks. The property gained 28 m² of full living space: a spacious master bedroom with bathroom and plenty of natural light. From the street, the house looks entirely natural, as if the roof extension had always been there. The contractor was able to start immediately without any additional work, thanks to the complete drawings.
Key project details
What we delivered
Whether you live in Haarlem, Noord-Holland or elsewhere in the Netherlands: we handle design, structure and permits from A to Z. Since 2016, 800+ projects. A no-obligation quote within 1 working day.