Commercial and industrial sites
What do commercial drainage services cost?
A production line backing up is not a blocked kitchen sink with a bigger invoice. Commercial buyers are purchasing a response time, a planned jetting programme, a CCTV record the landlord or insurer will accept, and a contractor who can work around a live site. Nobody publishes a rate for that, because the site sets it: what is below is the honest list of what moves the number, and the form puts your premises in front of contractors who price it properly.
What happens next
- Tell us the premises, the problem and whether you want a call-out or a contract. Two minutes, no account.
- We pass your details to commercial drainage contractors covering the site postcode, and to nobody else.
- They quote you directly, with their response times in writing. Compare, appoint, or walk away.
Commercial Drainage Quotes is an independent free introduction service operated by Ellul Solutions Ltd; 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.
What moves a commercial drainage price, 2026
Last updated
We do not publish a price for commercial drainage, and any site that does is guessing. A 24-hour response contract across nine retail units and a one-off jetting visit to a single factory yard are different products with no common rate. What follows is the honest version: the factors contractors actually price against, why each one moves the number, and the exact thing to ask for so two quotes can be compared side by side.
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.
| Cost driver | Why it moves the price | What to ask for |
|---|---|---|
| Response time commitment | A guaranteed attendance window means the contractor holds capacity for you. A two-hour commitment is priced very differently from next available | The response time in hours, in writing, and what happens if it is missed |
| Jetting versus excavation | Jetting is a tanker, a crew and time on site. Excavation adds reinstatement, spoil, possible traffic management and a much longer site presence | A jetting price and, separately, a rate for excavation if the survey finds a defect |
| CCTV survey and reporting | A camera run is cheap; the written report, the defect coding, the drainage plan and the version your insurer or landlord will accept are the work | A written report with footage and a plan, priced as a line item |
| Out-of-hours and shift working | Night and weekend attendance carries premium labour rates, and working around a live production shift is slower than an empty yard | The out-of-hours uplift as a stated rate, not as a percentage of an unnamed base |
| Contract versus call-out | A contract spreads planned work and buys priority; a call-out is priced fully at the moment you are least able to negotiate | Both priced: annual contract, and the ad-hoc rate you would pay without one |
| Access, permits and confined space | Yard traffic, locked chambers, permits to work and any entry into a chamber or tank change the crew, the equipment and the paperwork | Confirmation the crew is trained and equipped for the access your site actually has |
| Waste type and disposal | What comes out of the system decides where it can go. Interceptor and trade effluent arisings are not the same disposal ticket as silt | Where the arisings go, and the transfer documentation you will receive |
- 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.
Cite this page
“What moves a commercial drainage price, 2026”, Commercial Drainage Quotes, https://commercialdrainagequotes.co.uk/ (updated 2026-08-14). 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.
Guides
Every figure sourced and dated.
- Commercial drainage contract or call-out: which costs you less?
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?
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
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
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.
The questions we get
How much does commercial drainage cost?
There is no meaningful published price, because commercial drainage is quoted per site. The variables that decide it are the response commitment you want, access and permits, whether the fix is jetting or excavation, how much CCTV and reporting you need, whether work happens in or out of hours, and whether you are buying a contract or a one-off call-out. Our cost-driver table sets out each one and what to ask for so competing quotes are comparable.
What is the difference between commercial and domestic drainage work?
Scale, access and paperwork. Commercial sites have assets a house does not have, such as interceptors, pump stations, grease management and yard drainage; they often need work done around a live operation or overnight; and they usually need a written record of what was found and where the arisings went. Buyers are also purchasing a response time rather than an available engineer.
Do I need a drainage contract or can I just call someone out?
Both are legitimate. A contract buys a stated attendance window, a planned programme and a pre-agreed reactive rate; a call-out is priced at the moment your site is down. The test is what an hour of downtime costs you. Ask for both priced against the same scope and apply each to your actual call-out history from last year.
Who is responsible for drains on commercial premises?
Private sewers and lateral drains connected to the public sewer transferred to the water and sewerage companies from 1 October 2011, and blockages in the public network are their work. Pipework between the building and that transferred sewer, plus site assets such as pump stations, interceptors and yard drainage, stay with the property. Between landlord and tenant, the lease decides who pays.
What cannot be discharged into a public sewer?
Section 111 of the Water Industry Act 1991 prohibits turning into a public sewer any matter likely to injure the sewer, interfere with the free flow of its contents or prejudicially affect their treatment and disposal, along with chemical refuse or waste steam and liquids above 43 degrees Celsius in the circumstances it describes, and it names petroleum spirit and carbide of calcium. Trade effluent discharges are separately a matter of consent from your sewerage undertaker.
Is this quote service really free?
Yes, free to you, with no obligation to appoint anyone. We pass your details only to commercial drainage contractors covering your site, who quote you directly; we may receive a fee from those contractors, which is how the service is funded.