Do You Need a Permit for a Whole-House PEX Repipe? in Nederland
Usually yes. Replacing all water supply piping in a home — whether swapping galvanized steel, copper, or polybutylene for PEX — nearly always requires a plumbing permit. The work involves cutting into walls, floors, and ceilings to route new lines, modifying connections at the water heater and main shutoff, and typically requires a pressure test and final inspection. Permits ensure the installation meets code requirements for pipe sizing, support intervals, expansion loops, and separation from hot surfaces.
Do you need a permit?
Rarely required
- Permitting authority
- Gemeente (Omgevingsloket)
- Typical fee
- €0
What triggers a permit
- Full or partial replacement of existing water supply lines throughout the home
- Connecting new PEX manifold system at the water main or water heater
- Opening walls, floors, or ceilings to route or access plumbing lines
- Adding or relocating fixture supply connections (sinks, showers, toilets, washing machine)
- Pressure testing of the new system before concealment and final inspection
Country-specific detail
In the Netherlands, replacing the waterleiding (water supply piping) within a woning (dwelling) with PEX or multilayer pipe is generally vergunningsvrij (permit-free) under the Omgevingswet, as it constitutes regular onderhoud (maintenance) and does not alter the constructieve veiligheid or brandveiligheid of the building. PEX and PEX-AL-PEX are accepted under NEN norms and KIWA certification is standard for all drinkwater installations. A loodgieter (plumber) with a KIWA-BRL-certificaat must perform or supervise the work. The completed installation must pass a drukproef (pressure test) per NEN 1006 (AVWI — Algemene Voorschriften voor drinkwaterinstallaties). If the repipe involves modifying the aansluiting on the waterleidingnet (connection to the public water main), coordination with the local waterleidingbedrijf (e.g., Vitens, PWN, Dunea) is required — they perform the aansluiting work. In monumentale panden (listed buildings), routing new piping through protected interior elements may require an omgevingsvergunning.