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Garage conversion cost Netherlands 2026 — price guide for turning garage into living space
What does it cost to convert a garage into living space or annex dwelling in the Netherlands in 2026? Overview of costs, permit requirements and when an architect is required for a garage conversion.
Quick answer
The cost to convert a garage into living space in the Netherlands ranges from € 25,000 to € 75,000 in 2026, depending on the garage condition, desired finish and required services. For a change of use (garage → dwelling), a planning permit is always required, and an architect is mandatory for this.
Garage conversion costs 2026
| Item | Cost (incl. VAT) | Notes | |---|---|---| | Insulation (walls, floor, roof) | € 4,000–€ 12,000 | RC 3.5–4.5 required for residential use | | Underfloor heating or radiators | € 3,000–€ 8,000 | Connection to boiler or heat pump | | Electrics (consumer unit + cabling) | € 2,500–€ 6,000 | Separate connection or extension | | Drainage / plumbing (kitchen + bathroom) | € 3,000–€ 10,000 | Depends on distance to sewer | | Ventilation (mechanical, heat recovery) | € 2,000–€ 5,000 | Mandatory for residential use (Building Code) | | Window frames, windows, doors | € 3,000–€ 8,000 | Daylight requirement: min. 10% of floor area | | Finishing (plastering, flooring, painting) | € 5,000–€ 15,000 | Depends on quality level | | Architect + permit + structural engineer | € 3,000–€ 8,000 | Mandatory for change of use | | Total average | € 25,000–€ 75,000 | Depending on scope and condition |
When do costs increase significantly?
| Factor | Effect on cost | |---|---| | Lowering floor level (garage on higher level) | +€ 5,000–€ 15,000 | | Foundation reinforcement (existing cracks/settlement) | +€ 5,000–€ 20,000 | | Asbestos removal (older garages) | +€ 3,000–€ 10,000 | | New roof structure (flat to pitched roof) | +€ 8,000–€ 20,000 | | Higher finish quality (luxury bathroom, bespoke) | +€ 10,000–€ 30,000 | | Listed building or protected townscape | +20–40% (material advice + extra permit steps) |
Permit and architect for garage conversion
A change of use from garage to dwelling always requires a planning permit for building works and a planning permit for use contrary to the zoning plan. An architect is mandatory:
- Architect produces drawings and verifies compliance (Building Code, BENG energy standard)
- Architect submits the application to the municipality
- Structural engineer calculates any structural modifications
- Permit processing time: 8–16 weeks
Annex dwelling in garage (mantelzorgwoning)
For a care-dependent annex dwelling in a garage, separate rules apply:
- Temporary planning permit (no zoning plan change required)
- Architect produces drawings showing the dwelling is independently habitable
- Costs similar: € 20,000–€ 60,000 depending on facilities
Conclusion
Converting a garage to living space costs an average of € 25,000–€ 75,000 in 2026. An architect and planning permit are always required for a change of use. An architect reduces construction costs through an efficient design and the correct permit strategy.
archi.sulerr.com handles the full process: design, BENG energy calculation, permit application and construction supervision for your garage conversion.