{ "name": "sewagetreatmentplantcost.co.uk UK Sewage Treatment Plant Price Index", "title": "UK Sewage Treatment Plant Price Index", "url": "https://sewagetreatmentplantcost.co.uk/datasets/uk-sewage-treatment-plant-price-index/", "csv": "https://sewagetreatmentplantcost.co.uk/datasets/uk-sewage-treatment-plant-price-index.csv", "markdown": "https://sewagetreatmentplantcost.co.uk/datasets/uk-sewage-treatment-plant-price-index/index.md", "computed_at": "2026-10-28", "license": "https://sewagetreatmentplantcost.co.uk/terms", "headline": "For 6-person, the median published figure in the UK Sewage Treatment Plant Price Index is 2,196 GBP across 3 figures from the sources' own pages (range 2,061.89 to 2,196 GBP), read 28 October 2026.", "quotes": [ "For 6-person, the median published figure in the UK Sewage Treatment Plant Price Index is 2,196 GBP across 3 figures from the sources' own pages (range 2,061.89 to 2,196 GBP), read 28 October 2026.", "5 of the 28 named sources read in full publish a figure; 23 publish none, read 28 October 2026.", "UK Sewage Treatment Plant Price Index, size 6-person: median 2,196 GBP across 3 sources, read 28 October 2026.", "UK Sewage Treatment Plant Price Index, size 9-person: median 3,532.10 GBP across 2 sources, read 28 October 2026.", "UK Sewage Treatment Plant Price Index, size smallest-domestic-from: median 1,430 GBP across 1 source, read 28 October 2026." ], "citation": "\"sewagetreatmentplantcost.co.uk UK Sewage Treatment Plant Price Index\", updated 2026-10-28, https://sewagetreatmentplantcost.co.uk/datasets/uk-sewage-treatment-plant-price-index/.", "changed_since": null, "national": { "unit": "GBP", "n": 6, "median": 2196, "min": 1430, "max": 4756, "p25": 1903.9175, "p75": 2920.1499999999996, "mean": 2491.3483, "units": { "GBP": 6 }, "published_sources": 5, "named_sources": 30, "read_sources": 28, "not_published": 23, "published_share": 0.179 }, "by_axis": { "size": { "6-person": { "GBP": { "n": 3, "median": 2196, "min": 2061.89, "max": 2196, "p25": 2061.89, "p75": 2196, "mean": 2151.2967 } }, "9-person": { "GBP": { "n": 2, "median": 3532.1, "min": 2308.2, "max": 4756, "p25": null, "p75": null, "mean": 3532.1 } }, "smallest-domestic-from": { "GBP": { "n": 1, "median": 1430, "min": 1430, "max": 1430, "p25": 1430, "p75": 1430, "mean": 1430 } } } }, "rows": [ { "source": "Sewage Treatment Plants - JDP", "url": "https://store.jdpipes.co.uk/sewage-treatment-plants/", "figure": "£2,061.89 ", "value": 2061.89, "unit": "GBP", "vat": null, "axis": { "size": "6-person" }, "retrieved_at": "2026-10-28", "quote": "£2,061.89 ex.", "source_class": "primary-provider-own-site", "text_sha256": "fb2255bb481f7efa724ea9b8d10d5cfba9d45b8ac82278f9a48c01f340acefd0" }, { "source": "Sewage Treatment Plants - JDP", "url": "https://store.jdpipes.co.uk/sewage-treatment-plants/", "figure": "£2,308.20 ", "value": 2308.2, "unit": "GBP", "vat": null, "axis": { "size": "9-person" }, "retrieved_at": "2026-10-28", "quote": "£2,308.20 ex.", "source_class": "primary-provider-own-site", "text_sha256": "fb2255bb481f7efa724ea9b8d10d5cfba9d45b8ac82278f9a48c01f340acefd0" }, { "source": "Klargester BioDisc BX Sewage Treatment Plant, Fuel Tank Shop", "url": "https://fueltankshop.co.uk/products/klargester-biodisc-bx-sewage-treatment-plant-9-people", "figure": "£4,756.00", "value": 4756, "unit": "GBP", "vat": null, "axis": { "size": "9-person" }, "retrieved_at": "2026-10-28", "quote": "from £4,756.00", "source_class": "primary-provider-own-site", "text_sha256": "f8a9ee98dc4c87e00e24dcac16e3b8f523ab4d15e0d42f1f9ca78265c813a56d" }, { "source": "Sewage Treatment Plants UK | WTE", "url": "https://www.wte-ltd.co.uk/sewage-treatment-plants", "figure": "£1,430 ", "value": 1430, "unit": "GBP", "vat": "ex", "axis": { "size": "smallest-domestic-from" }, "retrieved_at": "2026-10-28", "quote": "From £1,430 + VAT.", "source_class": "primary-provider-own-site", "text_sha256": "acf6b5003d1e6283869da0f46b6153c15ef4c04e78e913f4c9a067fe8fa73e8e" }, { "source": "Klargester BioTec+ 2 Sewage Treatment Plant - 6 Person - Tanks Direct", "url": "https://tanks-direct.co.uk/klargester-bioair-2-economy-sewage-treatment-plant-6-person/p46341", "figure": "£2,196.00", "value": 2196, "unit": "GBP", "vat": null, "axis": { "size": "6-person" }, "retrieved_at": "2026-10-28", "quote": "YOUR PRICE · EX VAT £2,196.00", "source_class": "primary-provider-own-site", "text_sha256": "b48f4e944be085b993d0af25bd34d1bf77cfc0394eacd78ec0e704668059df03" }, { "source": "Klargester BioTec+ 6 person Sewage Treatment Plant, Fuel Tank Shop", "url": "https://fueltankshop.co.uk/products/klargester-biotec-6-person-sewage-treatment-plant", "figure": "£2,196.00", "value": 2196, "unit": "GBP", "vat": null, "axis": { "size": "6-person" }, "retrieved_at": "2026-10-28", "quote": "from £2,196.00", "source_class": "primary-provider-own-site", "text_sha256": "7b7c178cfb014e7e40ff4184bd1c8eb6523502b6145780a0fc3efed3eaf4dbec" } ], "not_published": [ { "source": "Sewage Treatment Systems - Wastewater Management - JDP - Page 2", "url": "https://store.jdpipes.co.uk/sewage-treatment/?page=2", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Klargester BioDisc BA Sewage Treatment Plant, Fuel Tank Shop", "url": "https://fueltankshop.co.uk/products/klargester-biodisc-ba-sewage-treatment-plant-6-people", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Klargester BK BioDisc Sewage Treatment Plant, Tanks Direct", "url": "https://www.tanks-direct.co.uk/klargester-bk-biodisc-sewage-treatment-plant/p43121", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Klargester BL BioDisc Sewage Treatment Plant, Tanks Direct", "url": "https://tanks-direct.co.uk/products/klargester-bl-biodisc-sewage-treatment-plant", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "How much it costs to install a septic system in the UK", "url": "https://www.premiertechaqua.com/en-gb/blog/domestic-sewage-treatment-plant-cost", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "How much it costs to install a septic system in the UK", "url": "https://www.premiertechaqua.com/en-gb/installation/estimated-project-costs", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Sewage Treatment Plant Installation Costs UK, What to Charge to Install One in 2026", "url": "https://www.trade2base.com/blog/sewage-treatment-plant-installation-costs-uk", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "How much does the Ecoflo sewage treatment plant cost?", "url": "https://www.premiertechaqua.com/en-gb/blog/ecoflo-cost", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Sewage Treatment Plant Installation Costs UK | squote", "url": "https://squote.app/knowledge/costs/sewage-treatment-plant-installation-pricing-guide", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Installing a Septic Tank Costs Explained - MyBuilder", "url": "https://www.mybuilder.com/groundwork-foundations/price-guides/septic-tank-installation-cost", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Septic Tank Installation Cost Guide (UK Prices 2026)", "url": "https://www.myjobquote.co.uk/costs/installing-septic-tank", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "The supply and installation Sewage Treatment Plant in Itchen Stoke, Hampshire - Find a Tender", "url": "https://www.find-tender.service.gov.uk/Notice/029796-2025", "retrieved_at": "2026-10-28", "reason": "read in full and no accepted figure on the page" }, { "source": "The Installation of a New Sewage Treatment Plant at Portley Hill Depot, Littleport - Find a Tender", "url": "https://www.find-tender.service.gov.uk/Notice/020858-2022", "retrieved_at": "2026-10-28", "reason": "read in full and no accepted figure on the page" }, { "source": "Installation of Sewage Treatment Plant System - Witcham Farm, Manea, Cambridgeshire - Find a Tender", "url": "https://www.find-tender.service.gov.uk/Notice/060595-2025", "retrieved_at": "2026-10-28", "reason": "read in full and no accepted figure on the page" }, { "source": "THE PROVISION OF SEWAGE TREATMENT PLANT, SHALFLEET PRIMARY SCHOOL, ISLE OF WIGHT - Find a Tender", "url": "https://www.find-tender.service.gov.uk/Notice/002690-2026", "retrieved_at": "2026-10-28", "reason": "read in full and no accepted figure on the page" }, { "source": "Replacing Your Septic Tank: Costs, Rule and Options", "url": "https://allertonuk.com/?p=16464", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Marsh Sewage Treatment Plants - JDP", "url": "https://store.jdpipes.co.uk/marsh-sewage-treatment-plants/", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Clearwater BioAir 6 Gravity Sewage Treatment Plant 20 Person, Tanks Direct", "url": "https://www.tanks-direct.co.uk/clearwater-bioair-cw6-sewage-treatment-plant-20-person/p47304", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Water Technology Engineering", "url": "https://www.enviropro.co.uk/company/172350/Water-Technology-Engineering/", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Servicing and Maintenance for Sewage Treatment Units", "url": "https://allertonuk.com/servicing-and-maintenance", "retrieved_at": "2026-10-28", "reason": "read in full and no accepted figure on the page" }, { "source": "Sewage Treatment Calculator UK | Plant Size Estimator", "url": "https://ukcalculator.com/sewage-treatment-calculator.html", "retrieved_at": "2026-10-28", "reason": "read in full and no accepted figure on the page" }, { "source": "Let the Experts Take Care of your Domestic Waste Water Problems, Design Buy Build", "url": "https://designbuybuild.co.uk/let-experts-take-care-domestic-waste-water-problems/", "retrieved_at": "2026-10-28", "reason": "every candidate on the page was refused" }, { "source": "Discontinued wastewater, rainwater and storage products", "url": "https://www.premiertechaqua.com/en-gb/wastewater-treatment/sewage-treatment-plant-asp", "retrieved_at": "2026-10-28", "reason": "read in full and no accepted figure on the page" } ], "sources": [ { "url": "https://www.bookabuilderuk.com/blog/septic-tank-replacement-cost-2026", "label": "Cost to Replace a Septic Tank in 2026 UK Guide | BookaBuilderUK.com", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://store.jdpipes.co.uk/sewage-treatment/?page=2", "label": "Sewage Treatment Systems - Wastewater Management - JDP - Page 2", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://store.jdpipes.co.uk/sewage-treatment-plants/", "label": "Sewage Treatment Plants - JDP", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://fueltankshop.co.uk/products/klargester-biodisc-ba-sewage-treatment-plant-6-people", "label": "Klargester BioDisc BA Sewage Treatment Plant, Fuel Tank Shop", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.tanks-direct.co.uk/klargester-bk-biodisc-sewage-treatment-plant/p43121", "label": "Klargester BK BioDisc Sewage Treatment Plant, Tanks Direct", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://tanks-direct.co.uk/products/klargester-bl-biodisc-sewage-treatment-plant", "label": "Klargester BL BioDisc Sewage Treatment Plant, Tanks Direct", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://fueltankshop.co.uk/products/klargester-biodisc-bx-sewage-treatment-plant-9-people", "label": "Klargester BioDisc BX Sewage Treatment Plant, Fuel Tank Shop", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.premiertechaqua.com/en-gb/blog/domestic-sewage-treatment-plant-cost", "label": "How much it costs to install a septic system in the UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.premiertechaqua.com/en-gb/installation/estimated-project-costs", "label": "How much it costs to install a septic system in the UK", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.trade2base.com/blog/sewage-treatment-plant-installation-costs-uk", "label": "Sewage Treatment Plant Installation Costs UK, What to Charge to Install One in 2026", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.premiertechaqua.com/en-gb/blog/ecoflo-cost", "label": "How much does the Ecoflo sewage treatment plant cost?", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://squote.app/knowledge/costs/sewage-treatment-plant-installation-pricing-guide", "label": "Sewage Treatment Plant Installation Costs UK | squote", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.mybuilder.com/groundwork-foundations/price-guides/septic-tank-installation-cost", "label": "Installing a Septic Tank Costs Explained - MyBuilder", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.myjobquote.co.uk/costs/installing-septic-tank", "label": "Septic Tank Installation Cost Guide (UK Prices 2026)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.find-tender.service.gov.uk/Notice/029796-2025", "label": "The supply and installation Sewage Treatment Plant in Itchen Stoke, Hampshire - Find a Tender", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.find-tender.service.gov.uk/Notice/020858-2022", "label": "The Installation of a New Sewage Treatment Plant at Portley Hill Depot, Littleport - Find a Tender", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.find-tender.service.gov.uk/Notice/060595-2025", "label": "Installation of Sewage Treatment Plant System - Witcham Farm, Manea, Cambridgeshire - Find a Tender", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.find-tender.service.gov.uk/Notice/002690-2026", "label": "THE PROVISION OF SEWAGE TREATMENT PLANT, SHALFLEET PRIMARY SCHOOL, ISLE OF WIGHT - Find a Tender", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://allertonuk.com/?p=16464", "label": "Replacing Your Septic Tank: Costs, Rule and Options", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://tanks-direct.co.uk/klargester-bioair-2-economy-sewage-treatment-plant-6-person/p46341", "label": "Klargester BioTec+ 2 Sewage Treatment Plant - 6 Person - Tanks Direct", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://fueltankshop.co.uk/products/klargester-biotec-6-person-sewage-treatment-plant", "label": "Klargester BioTec+ 6 person Sewage Treatment Plant, Fuel Tank Shop", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://store.jdpipes.co.uk/marsh-sewage-treatment-plants/", "label": "Marsh Sewage Treatment Plants - JDP", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.tanks-direct.co.uk/clearwater-bioair-cw6-sewage-treatment-plant-20-person/p47304", "label": "Clearwater BioAir 6 Gravity Sewage Treatment Plant 20 Person, Tanks Direct", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.enviropro.co.uk/company/172350/Water-Technology-Engineering/", "label": "Water Technology Engineering", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://allertonuk.com/servicing-and-maintenance", "label": "Servicing and Maintenance for Sewage Treatment Units", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://ukcalculator.com/sewage-treatment-calculator.html", "label": "Sewage Treatment Calculator UK | Plant Size Estimator", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://designbuybuild.co.uk/let-experts-take-care-domestic-waste-water-problems/", "label": "Let the Experts Take Care of your Domestic Waste Water Problems, Design Buy Build", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.premiertechaqua.com/en-gb/wastewater-treatment/sewage-treatment-plant-asp", "label": "Discontinued wastewater, rainwater and storage products", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.wte-ltd.co.uk/sewage-treatment-plants", "label": "Sewage Treatment Plants UK | WTE", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.find-tender.service.gov.uk/Search", "label": "find-tender.service.gov.uk", "license": "the publisher's own terms; quoted for reporting and comment" } ], "methodology": "Every row is a verbatim sentence read from the named source's own page through our fetch service on the date shown, hash-pinned to the stored read (the sha of the page's visible text; the raw page is mirrored to R2). 5 of the 28 named sources that could be read published a usable figure; 23 published none and are recorded as not published, never filled in; 2 could not be read (blocked, dead or unreachable) and count nowhere. The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source for each breakdown it prices, in GBP (a source's median where its page yielded several accepted sentences for one breakdown), so a page that gives figures for several breakdowns gives one for each and N counts 6 figures, never sentences; 175 candidate sentence(s) were refused by a reviewer with the reason recorded. The fuller derivation this dataset is chartered to grow into (not yet what the figures above are; they are each source's own published figure as read): the median and range of PUBLISHED unit prices per population equivalent (6, 9, 12 person and up) across UK retailers and manufacturers, ex VAT normalised, beside the published installed-cost estimates and the awarded values in public contract notices; the share of installers that publish an installed price at all", "embed": "

2,196 GBP

median for 6-person, UK Sewage Treatment Plant Price Index, across 3 figures, read 28 October 2026

Source: sewagetreatmentplantcost.co.uk UK Sewage Treatment Plant Price Index
" }