Do you need a permit for tankless water heater installation? in Polen
Usually yes. Installing a tankless (on-demand) water heater typically requires both plumbing and possibly gas or electrical permits because it involves modifying water supply lines, gas piping or electrical circuits, and venting. Even replacing a tank-style heater with tankless usually triggers permits due to different connection requirements.
Do you need a permit?
Rarely required
- Permitting authority
- Główny Urząd Nadzoru Budowlanego (GUNB)
- Typical fee
- PLN 0–200
What triggers a permit
- New gas line installation or modification of existing gas piping
- Electrical circuit upgrade (200+ amp for electric tankless models)
- Venting through exterior wall or roof (gas models)
- Replacing tank-style heater with tankless (different connections and load)
Country-specific detail
In Poland, no building permit is needed for a like-for-like water heater swap. However, gas installations require a licensed gas fitter (instalator z uprawnieniami gazowymi) and a gas company sign-off (protokół szczelności instalacji gazowej). For new gas tankless heaters where no gas connection previously existed, the gas distribution operator (e.g., PSG) must approve the connection and the installation must be registered. Electric tankless heaters above 12 kW may require an electrical capacity upgrade (zwiększenie mocy przyłączeniowej) approved by the energy distributor.