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Conservatory cost Netherlands 2026 — price to build a glass extension or sunroom
Current overview of conservatory costs in the Netherlands 2026. What does a sunroom or glass extension cost, which types are available, and when do you need a permit? With cost tables and practical tips.
Quick answer
Conservatory costs in the Netherlands in 2026 typically range from € 8,000 to € 40,000 for a standard 15–25 m² unit, depending on the type, foundation and finish. Luxury conservatories (aluminium, integrated heating, triple glazing) can exceed € 80,000.
Conservatory costs by type
1. Lean-to or attached conservatory — main options
| Type | Price including installation | |---|---| | PVC conservatory (15–20 m², prefab) | € 8,000–€ 18,000 | | Aluminium conservatory (15–20 m², standard) | € 15,000–€ 30,000 | | Aluminium conservatory (20–30 m², luxury) | € 25,000–€ 50,000 | | Timber conservatory / orangery (bespoke) | € 30,000–€ 80,000+ | | All-glass architectural extension | € 40,000–€ 100,000+ |
2. Costs per m² (including materials + installation)
| Specification | Price per m² (incl. VAT) | |---|---| | Standard PVC | € 500–€ 900/m² | | Aluminium (standard) | € 900–€ 1,500/m² | | Aluminium (luxury, triple glazing) | € 1,500–€ 2,500/m² | | Timber / orangery (bespoke) | € 2,000–€ 4,000/m² |
3. Additional costs
| Item | Cost | |---|---| | Foundation / concrete slab | € 80–€ 150/m² | | Underfloor heating (in slab) | € 50–€ 100/m² | | Electrical installation | € 800–€ 2,000 | | Blinds / solar screens | € 200–€ 600/m width | | Central heating connection or air conditioning | € 1,000–€ 3,000 |
When is a permit required?
A conservatory is an extension. It is usually permit-free if all conditions are met:
- Located in the rear garden (max. 50% of rear plot covered)
- Height ≤ 3 m (measured from top of foundation)
- Depth ≤ 4 m from the rear façade
Permit required when:
- Depth > 4 m from the rear façade
- Listed building or protected townscape
- Located on a side adjacent to public road
- More than 50% of the rear plot already covered
> Always check via the Omgevingsloket — rules can vary by municipality.
Tips for a successful conservatory project
- Choose aluminium or timber for durability — PVC ages faster aesthetically
- Install underfloor heating in the slab — retrofitting later is much more expensive
- Invest in triple or HR++ glazing — a poorly insulated conservatory is unusable in winter
- Plan sun screening (external blinds or solar screens) — glass rooms overheat quickly in summer
- Involve an architect for permit drawings on more complex extensions
Conclusion
Conservatory costs in the Netherlands range from € 8,000 to € 80,000+ depending on type and specification. For a conservatory as part of a broader renovation, a clear project brief helps you brief contractors accurately and avoid scope creep.
archi.sulerr.com offers an AI-assisted briefing service from € 399 — including a structured project brief, cost estimate and scope for your architect or contractor.