Polski
УкраїнськаHow much does domestic wastewater treatment plant cost?
Domestic sewage treatment plant: half of the collected sources fall within 14 ‑ 16 PLN thousand, and the middle value (median) is 15 PLN thousand. Comparison based on 4 sources, as at 28 September 2026.
Figures on this page:all prices
Unit: PLN thousand for a complete system including installation (biological filter treatment plant). Prices stated in public price lists and guides, not confirmed by invoices. How we calculate them.
Prices by source
Hover over the bar (or tap it) to see the price and its source.
Domestic wastewater treatment plant: prices by source
Five sources with varying levels of reliability, deliberately kept separate so that declarations are not mixed with evidence. The price index consists of cited public price lists per unit of service (PLN thousand); customer reviews show amounts for entire jobs submitted via the ‘How much did you pay?’ form, with three verification levels (how we verify them); company price lists contain prices entered by the companies themselves. Price index as at: 28 September 2026; customer and company entries are updated continuously.
| Source | Median | Typical range / full range | Number |
|---|---|---|---|
| Price index: quoted public price lists and guidesevery price from a public website, with a quotation, date and link; median of range midpoints, excluding outliers | 15 PLN thousand | 14 ‑ 16 | 4 |
| Customer reviews verified with an invoice or receiptthe editorial team (initially assisted by AI) checked the document: the service, amount, date and contractor all match | - | - | 0 |
| Customer reviews verified by declaration (confirmed by e-mail)the author confirmed through an e-mail link their declaration that they had used the service and that the amount and review were genuine | - | - | 0 |
| Unverified customer reviewsamount submitted through the form without confirmation by e-mail or document | - | - | 0 |
| Price lists entered by companies (company declarations)gross prices entered by companies using the company form; we do not verify them or include them in the price index median | - | - | 0 |
At a glance. According to the price index (cited public price lists), Domestic wastewater treatment plant costs typically 14 ‑ 16 PLN thousand,median 15 PLN thousand, based on 4 sources, as at 28 September 2026.
We do not yet have customer reviews verified with an invoice or receipt for this service.
We do not yet have customer reviews verified by declaration (confirmed by e-mail) for this service.
We do not yet have unverified customer reviews for this service.
No company has yet added its own price list for this service.
Source for citation: indekscen.pl, ‘Domestic wastewater treatment plant’, as at 28 September 2026, https://indekscen.pl/en/ile-kosztuje/przydomowa-oczyszczalnia/. Method: how we calculate, how we verify. Data description for AI assistants: llms.txt.
Options and additional fees
| Option | Price | Sources |
|---|---|---|
| drainage system (the cheapest option, treatment plant only) | 3,000 ‑ 8,000 PLN | biopolis.pl |
| with a bioreactor (treatment plant only) | 7,000 ‑ 22,000 PLN | biopolis.pl |
| installation labour (separate) | 3,000 ‑ 10,000 PLN | instalacjebudowlane.pl |
| sewage treatment plant design | 300 ‑ 800 PLN | instalacjebudowlane.pl |
| sludge removal (operating cost) | 100 ‑ 300 PLN | biopolis.pl |
What affects the price
- type of treatment plant (drainage systems are the cheapest, while biological filter and bioreactor systems are more expensive)
- tank size and number of household members
- region and manufacturer
- installation complexity and type of soil on the plot
Usually charged separately
- sewage treatment plant design (PLN 300-800, sometimes included in the price)
- installation labour, if charged separately (PLN 3000-10000)
- ongoing operation (bacterial preparations, sludge removal)
Building a domestic sewage treatment plant costs more than building a septic tank, but it is usually much cheaper to operate.
Prices from customers and companies
Two types of entries: customers state how much they paid for the entire job and rate the contractor; service providers enter their price lists. Customer entries have three reliability levels: ✓ verified: invoice or receipt (the editorial team has seen a document matching the entry), ✓ verified: declaration (the author confirmed the entry using a link sent by e-mail) and unverified (how we verify entries); we do not verify company price lists. Price lists entered by companies are not included in the median at the top of the page; customer amounts are included only for services priced as a complete service.
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Price and satisfaction
| Amount paid | Entries with ratings | Average rating | 5★ ratings |
|---|
By company size
| Company size | Customer entries | Median from receipts | Average rating | Company price lists | Median from price lists (PLN thousand) |
|---|
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Contractors: domestic sewage treatment plant
Companies with a public price list for this service, based on our sources, and providers named by customers in reviews. The order is not a ranking; we do not charge for inclusion in the list.
| Contractor | How we know | Price | Customer rating |
|---|---|---|---|
| Traidenis-Pol | price list on the company or facility website | 12 ‑ 18 PLN thousand | - |
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Price sources
Each amount comes from a publicly accessible website. The quote is the passage containing the amount. Website data as at 28 September 2026; prices may have changed since then.
| Source | Type | City | Price (PLN thousand) |
|---|---|---|---|
| MG Projekt „Przydomowa oczyszczalnia ścieków z montażem kosztuje od 6,5 do około 12 tys. zł.”dokładniej: od 6,5 do 12 tys. zł, z montażem | guide / portal | all of Poland | 6 ‑ 12 |
| biopolis.pl · 2026-09„W tym przypadku ceny mieszczą się w przedziale 9000 – 22 000 złotych, co wynika między innymi z bardziej skomplikowanej budowy systemu, na którą składa się osadnik wstępny i złoże biologiczne.”cena samej oczyszczalni, bez robocizny montażu | guide / portal | all of Poland | 9 ‑ 22 |
| agromar.slask.pl · 2026„Cena przydomowej oczyszczalni ścieków razem z montażem zwykle mieści się w przedziale od 10 000 do 25 000 zł.”cena razem z montażem, rodzaj oczyszczalni niesprecyzowany; w tekście dokładnie: 10 000-25 000 zł | guide / portal | all of Poland | 10 ‑ 25 |
| Traidenis-Pol company profile · 2026„W standardowych warunkach gruntowych większość inwestycji zamyka się w przedziale 12 000–18 000 zł.”w standardowych warunkach gruntowych; w trudnym terenie (wysoki poziom wód, glina) koszt może wzrosnąć do 30 000 zł | company price list | all of Poland | 12 ‑ 18 |
Questions about the price
How much does a domestic sewage treatment plant with installation cost?
A domestic sewage treatment plant with installation usually costs from PLN 6,5 to 12 thousand for a biological treatment system, or more broadly, from PLN 10 to 25 thousand across different types. Under standard ground conditions, most projects cost PLN 12-18 thousand.
How much does it cost to empty a domestic sewage treatment plant?
Removal of sludge from a sewage treatment plant usually costs PLN 100-300 per service.
How much did you pay for this service?
The quickest way: upload a photo of the receipt or invoice and select a star rating, it takes half a minute. We will read the amount, company and date from the document. The entry will appear immediately. Once confirmed by e-mail, it will receive a yellow "verified: declaration" badge, and once the document has been checked, a green "verified: invoice or receipt" badge.
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