Kelderwaterdichting cost in Polen: typically PLN 200–500 as of 2026. The exact price depends on job scope, materials, urgency (emergency and after-hours work costs more), and local demand. Compare verified local pros and request free, no-obligation quotes for real prices on your job.
In Poland, basement waterproofing (hydroizolacja piwnicy) costs PLN 200–500 per m² for exterior membrane work and PLN 80–200 per m² for interior sealing. A typical 50 m² basement runs PLN 10,000–25,000 for full exterior treatment. Interior injection of cracks costs PLN 100–300 per running meter. Many Polish homes — especially pre-war buildings — have chronic moisture issues due to inadequate original waterproofing. Look for contractors experienced with the specific foundation type (pre-war brick, 1960s–80s concrete block, or modern poured concrete). A geological survey (badanie gruntowe) before work helps select the right method.
Average basement waterproofing costs by method
| Type project | Typische kosten (PLN) |
|---|---|
| Exterior membrane waterproofing (hydroizolacja) | 200–500 zł/m² |
| Interior sealing / coating (uszczelnienie wewnętrzne) | 80–200 zł/m² |
| 50 m² basement, full exterior treatment | 10 000–25 000 zł |
| Crack injection (per running meter) | 100–300 zł/m |
| Geological survey (badanie gruntowe) | 1 500–4 000 zł |
| Sump pump installation | 1 500–4 000 zł |
Basement waterproofing costs in Poland
In Poland, basement waterproofing (hydroizolacja piwnicy) costs PLN 200–500 per m² for exterior membrane work and PLN 80–200 per m² for interior sealing. A typical 50 m² basement runs PLN 10,000–25,000 for full exterior treatment. Interior injection of cracks costs PLN 100–300 per running meter. Many Polish homes — especially pre-war buildings — have chronic moisture issues due to inadequate original waterproofing.
Look for contractors experienced with the specific foundation type (pre-war brick, 1960s–80s concrete block, or modern poured concrete). A geological survey (badanie gruntowe) before work helps select the right method.
What affects the cost?
- Method chosen — interior solutions are 50–70% cheaper than exterior excavation
- Basement size — cost scales with linear footage of walls being treated
- Water table level — high water tables require more aggressive solutions
- Foundation type — poured concrete, block, or stone foundations require different approaches
- Accessibility — finished basements require demo/rebuild of drywall and flooring
- Landscaping impact — exterior waterproofing requires digging around the foundation
How to save on basement waterproofing
- Start with interior solutions — interior French drains cost 50–70% less than exterior excavation
- Get multiple bids — waterproofing is a high-margin industry with wide pricing variation
- Ask about warranties — the best companies offer transferable lifetime warranties