{"schemaVersion":"ready-scan.discovery-surface.v1","id":"urn:readyscan:corpus:buyer-question:house-up-q128032260-answer-37db94b8a31b22d7f332","key":"buyer_question:house-up-q128032260-answer-37db94b8a31b22d7f332","kind":"buyer_question","slug":"house-up-q128032260-answer-37db94b8a31b22d7f332","canonicalUrl":"https://directory.readyscan.ai/corpus/buyer-question/house-up-q128032260-answer-37db94b8a31b22d7f332","machineUrl":"https://directory.readyscan.ai/discovery/corpus/buyer-question/house-up-q128032260-answer-37db94b8a31b22d7f332.json","datePublished":"2026-10-21","dateModified":"2026-10-21","materialFingerprint":"fnv1a64:664e4d9123cd82cc","membershipFingerprint":"fnv1a64:bb3f2d572c6cfe77","relatedEntitySlugs":["house-up-q128032260"],"relatedSurfaceKeys":["buyer_question:house-up-q128032260-answer-06b4f0f3dc36de0bf03d","buyer_question:house-up-q128032260-answer-1ffa84c6344900baefea","buyer_question:house-up-q128032260-answer-4435642f293b92f4c552","buyer_question:house-up-q128032260-answer-729b12daf0fd105519e8","buyer_question:house-up-q128032260-answer-a4c863baccdb69c49f41","buyer_question:house-up-q128032260-answer-b602c1d5bda38d6dfe2b","buyer_question:house-up-q128032260-answer-bcccac9c1b0d187ce01c","evidence:house-up-q128032260"],"sourceIds":["ready-scan-subjects"],"provenance":[{"snapshotId":"house-up-q128032260-content-89af9fe59976f417-snapshot","sourceId":"ready-scan-subjects","sourceRecordId":"Q128032260","sourceRevisionId":"Q128032260:content:623b12a4f8acd795","sourceContentHash":"fnv1a64:3456232102354cc7","recordRevisionId":"Q128032260:content:623b12a4f8acd795","recordContentHash":"fnv1a64:16203da34106268b","sourceCanonicalUrl":"https://www.houseup.co.uk/","sourceModifiedAt":"2026-10-21T07:17:13.472Z","observedOn":"2026-10-21","permission":{"basis":"public_information","evidenceUrl":"https://www.houseup.co.uk/"},"attributionUrl":"https://www.houseup.co.uk/"}],"quality":{"method":"same_kind_unique_trigram_floor","minimumUniqueTrigramRatio":0.3,"status":"passed"},"title":"Can I extend my W4 terrace under permitted development?","summary":"Cited source answers across 1 active corpus record.","question":"Can I extend my W4 terrace under permitted development?","answers":[{"entitySlug":"house-up-q128032260","entityName":"House Up","answer":"“Many rear and side-return extensions on Chiswick houses fall within permitted development, subject to depth and height limits. Conservation areas and Article 4 directions remove some rights, and flats have none. A lawful development certificate (£274) confirms your position in writing before you build.”","sourceUrls":["https://www.houseup.co.uk/services/builders-chiswick"]}]}