2026 price guide
What does a home extension cost?
A practical price guide based on current Dutch market sources and completed projects. The prices below are guide prices for 2026, including labour and standard materials, excluding VAT.
Bespoke extension
€ 1,800 - € 3,500 / m²
Prefab shell
€ 3.150 / m² avg.
Typical 20 m²
€ 36,000 - € 70,000
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What affects price?
Variables that matter.
Size
The larger the extension, the lower the relative m2 price because fixed costs are spread over more area.
Finish level
Shell+ is cheaper; a complete finish including floor, ceiling, electrical work and painting costs more.
Glazing
Steel doors, large sliding doors and rooflights have a major impact on both budget and comfort.
Access
A tight city site or garden without rear access means extra logistics and therefore extra cost.
Municipal fees
Permit fees and required drawings or structural calculations differ per municipality.
Frequently asked questions