Tekenpunt / Projects / Conservatory Zeist
Completed project · Conservatory PLAN N°PRJ-ZST-2024 / SCALE 1:100 / 2024

Conservatory in Zeist

A 1950s detached house in Zeist received a light glass conservatory extending the living room towards the garden. The design was fully worked out as permit-free, with a structure that connects to the existing foundation without additional excavation.

TypeConservatory
LocationZeist
Surface area+16 m²
Lead timePermit-free
Year2024
ResultGlass garden room
§01 From sketch to completion

The complete process

01 · Challenge

A soft transition between living space and garden

The owners of a 1950s property in Zeist wanted to extend the living room towards the back garden, but without major building work. A glazed conservatory was a perfect fit for the style of the property and the large rear garden. The challenge was to connect the conservatory structurally to the existing foundations, which had not been calculated for additional loading, while also remaining within the permit-free dimensions.

02 · Our approach

Light steel frame on its own foundation

We designed a lightweight steel frame with laminated insulating glass. The conservatory rests on its own concrete ring beam, so no additional load is placed on the existing property. The roof plane is built at a shallow pitch that connects to the existing eave gutter. We resolved the transition between the living room and conservatory with a wide sliding-folding window in the existing facade, so that the space is experienced as a single whole.

03 · Result

Permit-free, completed within three weeks

Because the design was fully permit-free, work could start immediately upon receipt of the drawings. The contractor completed the conservatory in three weeks. The result is a light-filled garden room of 16 m² that can be used all year round thanks to the insulated glazing and underfloor heating. The clients use the conservatory as a breakfast room and home workspace with a view of the woodland garden of Zeist.

Key project details

Drafting
Construction drawing + construction details
Permit
Permit-free design
Structure
Light steel frame + edge beam
3D
Impression for the owner
Lead time
Drawings ready in 10 working days

What we delivered

  • Existing and new situation drawings (floor plans, elevations, sections)
  • Permit-free advice and dimension check
  • Structural calculation for steel frame and independent foundation
  • 3D visualisation for the residents
  • Junction detail existing facade and roof gutter
  • Execution-ready details allowing the contractor to start immediately
§03 Adding a conservatory yourself?

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