# Commercial Drainage Quotes

> Commercial drainage services for factories, estates and multi-site operators: what sets the price, what a response-time contract should say, and free quotes.

## Key facts

- Commercial drainage is quoted per site, not per job type: response commitment, access, method, reporting and hours worked account for most of the variation between two quotes for the same blockage.
- Private sewers and lateral drains connected to the public sewer became the water and sewerage companies' responsibility from 1 October 2011; the pipework between the building and that transferred sewer remains the property owner's.
- Section 111 of the Water Industry Act 1991 prohibits discharging into a public sewer any matter likely to injure the sewer, interfere with the free flow of its contents or prejudicially affect the treatment and disposal of its contents, along with chemical refuse, waste steam, liquids above 43 degrees Celsius in the circumstances the section sets out, petroleum spirit and carbide of calcium.

## Key pages

- [What do commercial drainage services cost?](https://commercialdrainagequotes.co.uk/): the main tool, answer above the fold.
- [Commercial drainage contract or call-out: which costs you less?](https://commercialdrainagequotes.co.uk/commercial-drainage-contract/): A drainage contract buys response times and planned jetting; a call-out is priced when you have no leverage. How to compare the two properly and what to put in writing.
- [Who owns the drain on a commercial site, you or the water company?](https://commercialdrainagequotes.co.uk/who-owns-the-drain-on-a-commercial-site/): Private drain, lateral drain or public sewer decides who pays on a commercial site. What transferred in 2011, what did not, and how a lease can move the bill again.
- [What you cannot discharge to a public sewer: section 111 explained](https://commercialdrainagequotes.co.uk/what-you-cannot-discharge-to-a-public-sewer/): Section 111 of the Water Industry Act 1991 bans discharging matter that could injure a sewer, chemical refuse, petroleum spirit and more. What it means for a site.
- [Out-of-hours drainage response: what a real commitment looks like](https://commercialdrainagequotes.co.uk/out-of-hours-drainage-response/): Out-of-hours drainage callouts for commercial sites: what the premium buys, how to word a response commitment, and the questions to ask before the tanker sets off.
- [What moves a commercial drainage price, 2026](https://commercialdrainagequotes.co.uk/#data): original data table, updated 2026-08-14.
- [Full site content as markdown](https://commercialdrainagequotes.co.uk/llms-full.txt)

## Data

- What moves a commercial drainage price, 2026. Methodology: This is a cost-driver table, not a price list, and that is deliberate. Commercial drainage quotes are built from site-specific variables (response commitment, access, method, reporting, hours worked, contract length) that no published average survives, so a range here would mislead a buyer more than it helped. Each row states what the factor is, why it changes the quote, and the wording to put in your enquiry so competing quotes are comparable. Figures for your own site come from the contractors, through the form above. Reviewed August 2026.
- Last updated: 2026-08-14. Every figure cites its source inline.
- Source: legislation.gov.uk, Water Industry Act 1991, section 111 (restrictions on use of public sewers): https://www.legislation.gov.uk/ukpga/1991/56/section/111
- Source: legislation.gov.uk, Water Industry (Schemes for Adoption of Private Sewers) Regulations 2011: https://www.legislation.gov.uk/uksi/2011/1566/contents
- Source: Thames Water, ownership of private sewers and pumping stations: https://www.thameswater.co.uk/help/home-improvements/ownership-of-private-sewers-and-pumping-stations

## Citation

Cite as: "What moves a commercial drainage price, 2026", Commercial Drainage Quotes, https://commercialdrainagequotes.co.uk/ (updated 2026-08-14).

## About

- Commercial Drainage Quotes is a free introduction service; we pass your details to commercial drainage contractors who quote the work directly. We are not affiliated with any water company, regulator or body named on this site. We may receive a fee from providers; you pay nothing and are under no obligation. We are not a drainage contractor and nothing here is legal or regulatory advice.
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