# What is Shell Construction (Cascobouw)?
**Shell construction is a building method in which the contractor delivers only the structural shell of a building — the load-bearing frame, roof and external walls — leaving the internal fit-out and finishing to the buyer.** This gives the homeowner maximum freedom over the layout and specification.
## What the Contractor Delivers
– **Foundation and structural floors**
– **Load-bearing walls and columns**
– **Roof structure with covering**
– **External walls with windows and glazing**
– Sometimes a **basic connection** for drainage, water and electricity
## What the Buyer Does
– **Internal walls** and room layout
– All **building services** (electrical, plumbing, heating)
– **Floor, wall and ceiling finishes**
– **Kitchen and bathroom**
## Advantages
– **Lower purchase price** — no fit-out costs in the purchase sum
– **Complete freedom of choice** — the buyer decides layout, materials and quality level
– **Phased fit-out** — the interior can be completed at the buyer’s own pace and budget
– **DIY savings** — hands-on builders can save significantly on labour costs
## Considerations
– A **realistic fit-out budget** is essential — costs are often underestimated
– **Building knowledge** is needed or must be hired in
– **Mortgage lenders** may impose additional requirements for shell purchases
## Related Terms
– Shell (casco)
– Self-build
– Fit-out
– Construction process
– Owner-builder
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