{ "name": "basementexcavationcost.co.uk UK Construction Cost Series", "title": "UK Construction Cost Series", "url": "https://basementexcavationcost.co.uk/datasets/uk-construction-cost-series/", "csv": "https://basementexcavationcost.co.uk/datasets/uk-construction-cost-series.csv", "markdown": "https://basementexcavationcost.co.uk/datasets/uk-construction-cost-series/index.md", "computed_at": "2026-09-26", "license": "https://basementexcavationcost.co.uk/terms", "headline": "The median published figure in the UK Construction Cost Series is 1.10 percent across 6 figures from 2 sources' own pages (range 0.10 to 4.90 percent), read 26 September 2026.", "quotes": [ "The median published figure in the UK Construction Cost Series is 1.10 percent across 6 figures from 2 sources' own pages (range 0.10 to 4.90 percent), read 26 September 2026.", "2 of the 5 named sources read in full publish a figure; 3 publish none, read 26 September 2026.", "UK Construction Cost Series, series total construction output, three-month change to July 2026: median 0.50 percent across 1 source, read 26 September 2026.", "UK Construction Cost Series, series new construction work, three-month change to July 2026: median 0.40 percent across 1 source, read 26 September 2026.", "UK Construction Cost Series, series total construction output, monthly change July 2026: median 0.10 percent across 1 source, read 26 September 2026.", "UK Construction Cost Series, series producer input prices, annual rate to July 2026: median 4.90 percent across 1 source, read 26 September 2026.", "UK Construction Cost Series, series producer output (factory gate) prices, annual rate to July 2026: median 3.10 percent across 1 source, read 26 September 2026.", "UK Construction Cost Series, series producer input prices, monthly change July 2026: median 1.70 percent across 1 source, read 26 September 2026.", "The median is unchanged since 25 September 2026 (was 1.10 percent across 6)." ], "citation": "\"basementexcavationcost.co.uk UK Construction Cost Series\", updated 2026-09-26, https://basementexcavationcost.co.uk/datasets/uk-construction-cost-series/.", "changed_since": { "since": "2026-09-25", "previous_median": 1.1, "delta": 0, "direction": "unchanged", "sentence": "The median is unchanged since 25 September 2026 (was 1.10 percent across 6)." }, "national": { "unit": "%", "n": 6, "median": 1.1, "min": 0.1, "max": 4.9, "p25": 0.32500000000000007, "p75": 3.5500000000000003, "mean": 1.7833, "units": { "%": 6 }, "published_sources": 2, "named_sources": 5, "read_sources": 5, "not_published": 3, "published_share": 0.4 }, "by_axis": { "series": { "total construction output, three-month change to July 2026": { "%": { "n": 1, "median": 0.5, "min": 0.5, "max": 0.5, "p25": 0.5, "p75": 0.5, "mean": 0.5 } }, "new construction work, three-month change to July 2026": { "%": { "n": 1, "median": 0.4, "min": 0.4, "max": 0.4, "p25": 0.4, "p75": 0.4, "mean": 0.4 } }, "total construction output, monthly change July 2026": { "%": { "n": 1, "median": 0.1, "min": 0.1, "max": 0.1, "p25": 0.1, "p75": 0.1, "mean": 0.1 } }, "producer input prices, annual rate to July 2026": { "%": { "n": 1, "median": 4.9, "min": 4.9, "max": 4.9, "p25": 4.9, "p75": 4.9, "mean": 4.9 } }, "producer output (factory gate) prices, annual rate to July 2026": { "%": { "n": 1, "median": 3.1, "min": 3.1, "max": 3.1, "p25": 3.1, "p75": 3.1, "mean": 3.1 } }, "producer input prices, monthly change July 2026": { "%": { "n": 1, "median": 1.7, "min": 1.7, "max": 1.7, "p25": 1.7, "p75": 1.7, "mean": 1.7 } } } }, "rows": [ { "source": "ONS construction output in Great Britain", "url": "https://www.ons.gov.uk/businessindustryandtrade/constructionindustry/bulletins/constructionoutputingreatbritain/latest", "figure": "0.5%", "value": 0.5, "unit": "%", "vat": null, "axis": { "series": "total construction output, three-month change to July 2026" }, "retrieved_at": "2026-09-11", "quote": "Total construction output is estimated to have fallen by 0.5% in the three months to July 2026; this follows four consecutive increases in the three-monthly series, with strong growth seen in the three months to April and May, of 1.3% and 1.5%, respectively.", "source_class": "primary-government", "text_sha256": "389388e0accd6f7c34608b8645f0816caed0a3fcd52ac66e9e8b66466d3ce879" }, { "source": "ONS construction output in Great Britain", "url": "https://www.ons.gov.uk/businessindustryandtrade/constructionindustry/bulletins/constructionoutputingreatbritain/latest", "figure": "0.4%", "value": 0.4, "unit": "%", "vat": null, "axis": { "series": "new construction work, three-month change to July 2026" }, "retrieved_at": "2026-09-11", "quote": "Over the three-month period, both new work, and repair and maintenance, fell, by 0.4% and 0.7%, respectively.", "source_class": "primary-government", "text_sha256": "389388e0accd6f7c34608b8645f0816caed0a3fcd52ac66e9e8b66466d3ce879" }, { "source": "ONS construction output in Great Britain", "url": "https://www.ons.gov.uk/businessindustryandtrade/constructionindustry/bulletins/constructionoutputingreatbritain/latest", "figure": "0.1%", "value": 0.1, "unit": "%", "vat": null, "axis": { "series": "total construction output, monthly change July 2026" }, "retrieved_at": "2026-09-11", "quote": "Monthly construction output is estimated to have grown by 0.1% in July 2026; this follows a decrease of 0.1% in June 2026 and a decrease of 0.8% in May 2026.", "source_class": "primary-government", "text_sha256": "389388e0accd6f7c34608b8645f0816caed0a3fcd52ac66e9e8b66466d3ce879" }, { "source": "ONS producer price inflation", "url": "https://www.ons.gov.uk/economy/inflationandpriceindices/bulletins/producerpriceinflation/latest", "figure": "4.9%", "value": 4.9, "unit": "%", "vat": null, "axis": { "series": "producer input prices, annual rate to July 2026" }, "retrieved_at": "2026-09-11", "quote": "Producer input prices rose by 4.9% in the year to July 2026, down from a revised rise of 7.4% in the year to June.", "source_class": "primary-government", "text_sha256": "c87c37b3e37d07f3e7d3a9f124abedf4d60e12f2b61f9a106c8cbe15e661dfd7" }, { "source": "ONS producer price inflation", "url": "https://www.ons.gov.uk/economy/inflationandpriceindices/bulletins/producerpriceinflation/latest", "figure": "3.1%", "value": 3.1, "unit": "%", "vat": null, "axis": { "series": "producer output (factory gate) prices, annual rate to July 2026" }, "retrieved_at": "2026-09-11", "quote": "Producer output (factory gate) prices rose by 3.1% in the year to July 2026, down from a rise of 3.5% in the year to June.", "source_class": "primary-government", "text_sha256": "c87c37b3e37d07f3e7d3a9f124abedf4d60e12f2b61f9a106c8cbe15e661dfd7" }, { "source": "ONS producer price inflation", "url": "https://www.ons.gov.uk/economy/inflationandpriceindices/bulletins/producerpriceinflation/latest", "figure": "1.7%", "value": 1.7, "unit": "%", "vat": null, "axis": { "series": "producer input prices, monthly change July 2026" }, "retrieved_at": "2026-09-11", "quote": "On a monthly basis, producer input prices fell by 1.7% and producer output (factory gate) prices rose by 0.2% in July 2026.", "source_class": "primary-government", "text_sha256": "c87c37b3e37d07f3e7d3a9f124abedf4d60e12f2b61f9a106c8cbe15e661dfd7" } ], "not_published": [ { "source": "ONS construction output price indices (dataset)", "url": "https://www.ons.gov.uk/businessindustryandtrade/constructionindustry/datasets/interimconstructionoutputpriceindices", "retrieved_at": "2026-09-11", "reason": "read in full and no accepted figure on the page" }, { "source": "BCIS construction indices", "url": "https://www.bcis.co.uk/insight/construction-indices-cost-and-price-indices/", "retrieved_at": "2026-09-11", "reason": "every candidate on the page was refused" }, { "source": "the index per release", "url": "https://www.ons.gov.uk/businessindustryandtrade/constructionindustry/datasets/interimconstructionoutputpriceindices", "retrieved_at": "2026-09-11", "reason": "read in full and no accepted figure on the page" } ], "sources": [ { "url": "https://www.ons.gov.uk/businessindustryandtrade/constructionindustry/datasets/interimconstructionoutputpriceindices", "label": "ONS construction output price indices (dataset)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.ons.gov.uk/businessindustryandtrade/constructionindustry/bulletins/constructionoutputingreatbritain/latest", "label": "ONS construction output in Great Britain", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.ons.gov.uk/economy/inflationandpriceindices/bulletins/producerpriceinflation/latest", "label": "ONS producer price inflation", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.bcis.co.uk/insight/construction-indices-cost-and-price-indices/", "label": "BCIS construction indices", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.ons.gov.uk/businessindustryandtrade/constructionindustry/datasets/interimconstructionoutputpriceindices", "label": "the index per release", "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 the estate's 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). 2 of the 5 named sources that could be read published a usable figure; 3 published none and are recorded as not published, never filled in; 0 could not be read (blocked, dead or unreachable) and count nowhere. The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source in % (a source's median where its page yielded several accepted sentences), so N counts sources, never sentences; 21 candidate sentence(s) were refused by a reviewer with the reason recorded. Derivation as chartered: the ONS construction output price index and producer price inflation series read on each release and applied to every £/m2 in the price index, so a figure a contractor published in 2024 is shown at today's money beside one published this month - the thing every basement cost guide on the web gets wrong by quoting undated numbers; the index level and the annual rate per release, with its revision status, and changed-since", "embed": "

1.10 percent

median published figure, UK Construction Cost Series, across 2 sources, read 26 September 2026

Source: basementexcavationcost.co.uk UK Construction Cost Series
" }