Tekenpunt/ Projects/ Roof extension Den Bosch
Completed project · Roof extension PLAN N°PRJ-DNB-2024 / SCALE 1:100 / 2024

Roof extension in Den Bosch

A 1970s corner house in the Muntel district of Den Bosch was extended with a full extra storey. The corner position offered more freedom in the facade layout. We delivered the complete package: design, structural engineering and building permit. Permit granted in 7 weeks.

TypeRoof extension
LocationDen Bosch
Surface area+32 m²
Lead timeBuilding permit 7 weeks
Year2024
ResultExtra storey
§01 From sketch to completion

The complete process

01 · Challenge

Corner house with two street-facing facades in a busy neighbourhood

The corner house in the Muntel had two street-facing facades visible from public space. The 's-Hertogenbosch aesthetic policy sets higher standards for roof extensions visible on more than one facade: materials and facade composition had to be convincing on both sides. At the same time, the owner wanted to make full use of the additional roof extension potential that the corner position offered, maximising the usable floor area.

02 · Our approach

Design with two facade expressions in one cohesive volume

We designed a roof extension in which the main facade receives a clean brick cladding and the side facade achieves a lighter composition via a corner window. By elaborating both facades down to detail level in the construction drawings, the aesthetic review committee could give an immediate verdict. We also held an informal consultation in advance with the municipal urban planner about the roof extension height in relation to the neighbouring plots.

03 · Result

32 m² with two facades that enrich the streetscape

The building permit was granted within 7 weeks. The clients gained 32 m² of living space: a large master bedroom with walk-in wardrobe and a second bedroom with a view over the neighbourhood. The corner position proved ideal for daylight on the upper floor: both facades bring in light when the sun is not shining on the other side. The contractor completed the shell within three weeks.

Key project details

Drafting
Construction drawing + facades both sides
Permit
Building permit, aesthetic review approved
Structure
Timber frame + steel beam calculation
Pre-application meeting
Informal consultation with municipal planning
Lead time
Permit arranged in 7 weeks

What we delivered

  • Existing and new situation drawings (floor plans, elevations, sections)
  • Complete building permit application with the municipality of 's-Hertogenbosch
  • Elevation drawings of both visible facades including material specifications
  • Structural calculation for timber frame and steel beams
  • 3D impression for aesthetic review committee and client
  • Execution-ready detail drawings for the contractor
§03 Adding a roof extension yourself?

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Last updated: June 2026 Content reviewed by the Tekenpunt team · in-house architect & KIWA-certified structural engineer