{ "name": "Curtilo Permitted Development Limits", "title": "Permitted Development Limits", "url": "https://curtilo.com/datasets/permitted-development-limits/", "csv": "https://curtilo.com/datasets/permitted-development-limits.csv", "markdown": "https://curtilo.com/datasets/permitted-development-limits/index.md", "computed_at": "2026-10-18", "license": "https://curtilo.com/terms", "headline": "The Permitted Development Limits carries 18 published figures read from 7 sources' own pages, from 7 to 56 day, read 17 October 2026.", "quotes": [ "The Permitted Development Limits carries 18 published figures read from 7 sources' own pages, from 7 to 56 day, read 17 October 2026.", "7 of the 21 named sources read in full publish a figure; 14 publish none, read 17 October 2026." ], "citation": "\"Curtilo Permitted Development Limits\", updated 2026-10-18, https://curtilo.com/datasets/permitted-development-limits/.", "changed_since": null, "national": { "unit": "day", "n": 7, "median": 21, "min": 21, "max": 42, "p25": 21, "p75": 31.5, "mean": 26.5, "units": { "day": 7, "week": 1 }, "published_sources": 7, "named_sources": 22, "read_sources": 21, "not_published": 14, "published_share": 0.333 }, "by_axis": {}, "rows": [ { "source": "GPDO 2015 Sch 2 Part 6 (agricultural and forestry development)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/6", "figure": "28 days", "value": 28, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "the expiry of 28 days following the date on which the application under sub-paragraph (2)(ii) was received by the local planning authority without the local planning authority making any determination as to whether such approval is required or notifying the applicant of their determination;", "source_class": "primary-government", "text_sha256": "c1affd5b32353605edddda8d2b591ded60db9dd55dc64a29930006dd49054915" }, { "source": "GPDO 2015 Sch 2 Part 6 (agricultural and forestry development)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/6", "figure": "21 days", "value": 21, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "display a site notice by site display on or near the land on which the proposed development is to be carried out, leaving the notice in position for not less than 21 days in the period of 28 days from the date on which the local planning authority gave the notice to the applicant; and", "source_class": "primary-government", "text_sha256": "c1affd5b32353605edddda8d2b591ded60db9dd55dc64a29930006dd49054915" }, { "source": "GPDO 2015 Sch 2 Part 6 (agricultural and forestry development)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/6", "figure": "21 days", "value": 21, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "where the site notice is, without any fault or intention of the applicant, removed, obscured or defaced before the period of 21 days referred to in sub-paragraph (iv)(aa) has elapsed, the applicant is treated as having complied with the requirements of that sub-paragraph if the applicant has taken reasonable steps for protection of the notice and, if need be, its replacement;", "source_class": "primary-government", "text_sha256": "c1affd5b32353605edddda8d2b591ded60db9dd55dc64a29930006dd49054915" }, { "source": "GPDO 2015 Sch 2 Part 6 (agricultural and forestry development)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/6", "figure": "7 days", "value": 7, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "(7) Where development is permitted by Class A(a), within 7 days of the date on which the development is substantially completed, the developer must notify the local planning authority in writing of that fact.", "source_class": "primary-government", "text_sha256": "c1affd5b32353605edddda8d2b591ded60db9dd55dc64a29930006dd49054915" }, { "source": "GPDO 2015 Sch 2 Part 6 (agricultural and forestry development)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/6", "figure": "7 days", "value": 7, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "(5) Where development is permitted by Class B(a), within 7 days of the date on which the development is substantially completed, the developer must notify the local planning authority in writing of that fact.", "source_class": "primary-government", "text_sha256": "c1affd5b32353605edddda8d2b591ded60db9dd55dc64a29930006dd49054915" }, { "source": "GPDO 2015 Sch 2 Part 6 (agricultural and forestry development)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/6", "figure": "28 days", "value": 28, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "where the local planning authority give the applicant notice within 28 days following the date of receiving the applicant's application of their determination that such prior approval is required, the giving of such approval;", "source_class": "primary-government", "text_sha256": "c1affd5b32353605edddda8d2b591ded60db9dd55dc64a29930006dd49054915" }, { "source": "GPDO 2015 Sch 2 Part 6 (agricultural and forestry development)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/6", "figure": "28 days", "value": 28, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "the expiry of 28 days following the date on which the application under sub-paragraph (1)(b) was received by the local planning authority without the local planning authority making any determination as to whether such approval is required or notifying the applicant of their determination;", "source_class": "primary-government", "text_sha256": "c1affd5b32353605edddda8d2b591ded60db9dd55dc64a29930006dd49054915" }, { "source": "GOV.UK Planning Practice Guidance: when is permission required", "url": "https://www.gov.uk/guidance/when-is-permission-required", "figure": "28 days", "value": 28, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "If, within 28 days of your application, the local planning authority has given no indication of whether prior approval is required or not, the demolition may begin without prior approval.", "source_class": "primary-government", "text_sha256": "dad0783709642afc2936521ca80172ba469629fc0d9c1d0800805d65b455ef39" }, { "source": "GOV.UK Planning Practice Guidance: when is permission required", "url": "https://www.gov.uk/guidance/when-is-permission-required", "figure": "8 weeks", "value": 8, "unit": "week", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "The local planning authority is required to make a decision on an application for prior approval to extend upwards within 8 weeks.", "source_class": "primary-government", "text_sha256": "dad0783709642afc2936521ca80172ba469629fc0d9c1d0800805d65b455ef39" }, { "source": "GOV.UK Planning Practice Guidance: when is permission required", "url": "https://www.gov.uk/guidance/when-is-permission-required", "figure": "8 weeks", "value": 8, "unit": "week", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "Where a decision has not been made within 8 weeks, there is a right of appeal to the Secretary of State for non-determination of the prior approval application.", "source_class": "primary-government", "text_sha256": "dad0783709642afc2936521ca80172ba469629fc0d9c1d0800805d65b455ef39" }, { "source": "GPDO 2015 Sch 2 Part 1 Class A (enlargement of a dwellinghouse)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/1/crossheading/class-a-enlargement-improvement-or-other-alteration-of-a-dwellinghouse", "figure": "21 days", "value": 21, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "specifies the date (being not less than 21 days from the date of the notice) by which representations are to be received by the local planning authority.", "source_class": "primary-government", "text_sha256": "2a96f51ab42483821befaf58b870ba1a8078a84e13bf3c020aa1db7d2c37ffe7" }, { "source": "GPDO 2015 Sch 2 Part 1 Class A (enlargement of a dwellinghouse)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/1/crossheading/class-a-enlargement-improvement-or-other-alteration-of-a-dwellinghouse", "figure": "42 days", "value": 42, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "the expiry of 42 days following the date on which the information referred to in sub-paragraph (2) was received by the local planning authority without the local planning authority notifying the developer as to whether prior approval is given or refused.", "source_class": "primary-government", "text_sha256": "2a96f51ab42483821befaf58b870ba1a8078a84e13bf3c020aa1db7d2c37ffe7" }, { "source": "GPDO 2015 Sch 2 Part 1 Class AA (additional storeys)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/1/crossheading/class-aa-enlargement-of-a-dwellinghouse-by-construction-of-additional-storeys", "figure": "21 days", "value": 21, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "specifies the date, which must not be less than 21 days from the date the notice is given, by which representations are to be received by the local planning authority.", "source_class": "primary-government", "text_sha256": "eaf343d505ea5019c94b2d534ac1250b174f675d6d5eccd23a29561981b9e7e2" }, { "source": "GPDO 2015 Sch 2 Part 1 Class AA (additional storeys)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/1/crossheading/class-aa-enlargement-of-a-dwellinghouse-by-construction-of-additional-storeys", "figure": "21 days", "value": 21, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "(9) The local planning authority must notify the consultees referred to in sub-paragraphs (6) and (8) specifying the date by which they must respond, being not less than 21 days from the date the notice is given.", "source_class": "primary-government", "text_sha256": "eaf343d505ea5019c94b2d534ac1250b174f675d6d5eccd23a29561981b9e7e2" }, { "source": "MHCLG technical guidance: permitted development rights for householders", "url": "https://www.gov.uk/government/publications/permitted-development-rights-for-householders-technical-guidance/permitted-development-rights-for-householders-technical-guidance", "figure": "42 days", "value": 42, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "Works cannot commence until the local planning authority notifies the householder that no prior approval is required, or gives prior approval, or 42 days have passed without any decision by the local planning authority.", "source_class": "primary-government", "text_sha256": "8f43a212092a42f828dd11c4b0e734c31dd640075578a322e2e696c87e710b06" }, { "source": "GPDO 2015 Sch 2 Part 3 (changes of use, Classes G-MA)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/3", "figure": "21 days", "value": 21, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "(7) The local planning authority must notify the consultees referred to in sub-paragraphs (5) and (6) specifying the date by which they must respond (being not less than 21 days from the date the notice is given).", "source_class": "primary-government", "text_sha256": "a16b811334e63aa9b515c428785bf2b0a03001d720e2cbfaee277f54fd2dce0d" }, { "source": "GPDO 2015 Sch 2 Part 3 (changes of use, Classes G-MA)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/3", "figure": "21 days", "value": 21, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "by site display in at least one place on or near the land to which the application relates for not less than 21 days of a notice which—", "source_class": "primary-government", "text_sha256": "a16b811334e63aa9b515c428785bf2b0a03001d720e2cbfaee277f54fd2dce0d" }, { "source": "GPDO 2015 Sch 2 Part 3 (changes of use, Classes G-MA)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/3", "figure": "56 days", "value": 56, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "the expiry of 56 days following the date on which the application under sub-paragraph (2) was received by the local planning authority without the authority notifying the applicant as to whether prior approval is given or refused.", "source_class": "primary-government", "text_sha256": "a16b811334e63aa9b515c428785bf2b0a03001d720e2cbfaee277f54fd2dce0d" }, { "source": "GPDO 2015 Sch 2 Part 20 (new dwellinghouses: upward extension and demolition-and-rebuild)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/20", "figure": "21 days", "value": 21, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "(11) The local planning authority must notify the consultees referred to in sub-paragraphs (5), (6), [F25(6A)] [F26(7), (10) and (10A)] specifying the date by which they must respond, being not less than 21 days from the date the notice is given.", "source_class": "primary-government", "text_sha256": "052e847631da71dc79bb097898685cd0795fcc7924ec32e04f3433557ed7d748" }, { "source": "GPDO 2015 Sch 2 Part 20 (new dwellinghouses: upward extension and demolition-and-rebuild)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/20", "figure": "21 days", "value": 21, "unit": "day", "vat": null, "axis": {}, "retrieved_at": "2026-10-17", "quote": "by site display in at least one place on or near the land to which the application relates for not less than 21 days of a notice which—", "source_class": "primary-government", "text_sha256": "052e847631da71dc79bb097898685cd0795fcc7924ec32e04f3433557ed7d748" } ], "not_published": [ { "source": "GPDO 2015 Sch 2 Part 1 Class E (buildings incidental to a dwellinghouse)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/1/crossheading/class-e-buildings-etc-incidental-to-the-enjoyment-of-a-dwellinghouse", "retrieved_at": "2026-10-17", "reason": "read in full and no accepted figure on the page" }, { "source": "GPDO 2015 Sch 2 Part 1 Class D (porches)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/1/crossheading/class-d-porches", "retrieved_at": "2026-10-17", "reason": "read in full and no accepted figure on the page" }, { "source": "GPDO 2015 Sch 2 Part 3 Class Q (agricultural buildings to dwellinghouses)", "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/3/crossheading/class-q-agricultural-buildings-to-dwellinghouses", "retrieved_at": "2026-10-17", "reason": "read in full and no accepted figure on the page" }, { "source": "GPDO 2015 article 4 (directions restricting permitted development)", "url": "https://www.legislation.gov.uk/uksi/2015/596/article/4", "retrieved_at": "2026-10-17", "reason": "read in full and no accepted figure on the page" }, { "source": "GPDO 2015 contents (every Part and Class in force)", "url": "https://www.legislation.gov.uk/uksi/2015/596/contents/made", "retrieved_at": "2026-09-12", "reason": "read in full and no accepted figure on the page" }, { "source": "GPD (England) (Amendment) Order 2024 (SI 2024/579: Classes Q, R, W, X and Part 6)", "url": "https://www.legislation.gov.uk/uksi/2024/579/made", "retrieved_at": "2026-09-12", "reason": "read in full and no accepted figure on the page" }, { "source": "GPD (England) (Amendment) Order 2024 (SI 2024/141: Class MA)", "url": "https://www.legislation.gov.uk/uksi/2024/141/made", "retrieved_at": "2026-09-12", "reason": "read in full and no accepted figure on the page" }, { "source": "GOV.UK lawful development certificates", "url": "https://www.gov.uk/guidance/lawful-development-certificates", "retrieved_at": "2026-10-03", "reason": "read in full and no accepted figure on the page" }, { "source": "MHCLG technical housing standards: nationally described space standard", "url": "https://www.gov.uk/government/publications/technical-housing-standards-nationally-described-space-standard", "retrieved_at": "2026-10-10", "reason": "read in full and no accepted figure on the page" }, { "source": "GOV.UK Planning Practice Guidance: housing optional technical standards", "url": "https://www.gov.uk/guidance/housing-optional-technical-standards", "retrieved_at": "2026-10-03", "reason": "read in full and no accepted figure on the page" }, { "source": "GPD (Scotland) Order 1992 contents", "url": "https://www.legislation.gov.uk/uksi/1992/223/contents/made", "retrieved_at": "2026-09-12", "reason": "read in full and no accepted figure on the page" }, { "source": "GPD Order 1995 contents (the order still in force in Wales)", "url": "https://www.legislation.gov.uk/uksi/1995/418/contents/made", "retrieved_at": "2026-09-12", "reason": "read in full and no accepted figure on the page" }, { "source": "Planning Portal: outbuildings, planning permission", "url": "https://www.planningportal.co.uk/permission/common-projects/outbuildings/planning-permission/", "retrieved_at": "2026-09-12", "reason": "read in full and no accepted figure on the page" }, { "source": "Planning Portal: extensions, planning permission", "url": "https://www.planningportal.co.uk/permission/common-projects/extensions/planning-permission/", "retrieved_at": "2026-09-12", "reason": "read in full and no accepted figure on the page" } ], "sources": [ { "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/1/crossheading/class-a-enlargement-improvement-or-other-alteration-of-a-dwellinghouse", "label": "GPDO 2015 Sch 2 Part 1 Class A (enlargement of a dwellinghouse)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/1/crossheading/class-aa-enlargement-of-a-dwellinghouse-by-construction-of-additional-storeys", "label": "GPDO 2015 Sch 2 Part 1 Class AA (additional storeys)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/1/crossheading/class-e-buildings-etc-incidental-to-the-enjoyment-of-a-dwellinghouse", "label": "GPDO 2015 Sch 2 Part 1 Class E (buildings incidental to a dwellinghouse)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/1/crossheading/class-d-porches", "label": "GPDO 2015 Sch 2 Part 1 Class D (porches)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/1", "label": "GPDO 2015 Sch 2 Part 1 (development within the curtilage of a dwellinghouse, Classes A-H)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/3/crossheading/class-q-agricultural-buildings-to-dwellinghouses", "label": "GPDO 2015 Sch 2 Part 3 Class Q (agricultural buildings to dwellinghouses)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/3", "label": "GPDO 2015 Sch 2 Part 3 (changes of use, Classes G-MA)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/6", "label": "GPDO 2015 Sch 2 Part 6 (agricultural and forestry development)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/20", "label": "GPDO 2015 Sch 2 Part 20 (new dwellinghouses: upward extension and demolition-and-rebuild)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2015/596/article/4", "label": "GPDO 2015 article 4 (directions restricting permitted development)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2015/596/contents/made", "label": "GPDO 2015 contents (every Part and Class in force)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2024/579/made", "label": "GPD (England) (Amendment) Order 2024 (SI 2024/579: Classes Q, R, W, X and Part 6)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/2024/141/made", "label": "GPD (England) (Amendment) Order 2024 (SI 2024/141: Class MA)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/guidance/when-is-permission-required", "label": "GOV.UK Planning Practice Guidance: when is permission required", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/government/publications/permitted-development-rights-for-householders-technical-guidance/permitted-development-rights-for-householders-technical-guidance", "label": "MHCLG technical guidance: permitted development rights for householders", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/guidance/lawful-development-certificates", "label": "GOV.UK lawful development certificates", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/government/publications/technical-housing-standards-nationally-described-space-standard", "label": "MHCLG technical housing standards: nationally described space standard", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.gov.uk/guidance/housing-optional-technical-standards", "label": "GOV.UK Planning Practice Guidance: housing optional technical standards", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/1992/223/contents/made", "label": "GPD (Scotland) Order 1992 contents", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.legislation.gov.uk/uksi/1995/418/contents/made", "label": "GPD Order 1995 contents (the order still in force in Wales)", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.planningportal.co.uk/permission/common-projects/outbuildings/planning-permission/", "label": "Planning Portal: outbuildings, planning permission", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.planningportal.co.uk/permission/common-projects/extensions/planning-permission/", "label": "Planning Portal: extensions, planning permission", "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). 7 of the 21 named sources that could be read published a usable figure; 14 published none and are recorded as not published, never filled in; 1 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 day (a source's median where its page yielded several accepted sentences), so N counts sources, never sentences; 18 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): ONE table of every permitted-development class in England (GPDO 2015 Schedule 2, Parts 1, 3, 6 and 20 as amended), a row per class carrying its numeric limits (height, depth, ground cover, floorspace, unit count, hectare and distance thresholds), its conditions, whether prior approval is required and on what matters, and the determination clock - joined to the amending SI and the date each limit last moved. Nobody publishes that table: legislation.gov.uk publishes the classes one crossheading at a time with no numbers extracted, the technical guidance narrates Part 1 only, and the commercial sites paraphrase. The derived figures are the count of classes in force, the count amended in the last 24 months, the distribution of prior-approval clocks (28, 42 and 56 days), and a changed-since diff on every numeric limit at each amendment.", "embed": "

21 to 42 day

7 published figures, Permitted Development Limits, across 7 sources, read 17 October 2026

Source: Curtilo Permitted Development Limits
" }