# 民法 / Civil Code — 第二百三十一条 (Article 231) - Law: 民法 (Civil Code), 明治二十九年法律第八十九号 - English title "Civil Code": Ministry of Justice translation - Kind: Act — the distinction between 法律 (Act), 政令 (Cabinet Order), 省令 (Ministerial Order) and 条例 (local ordinance) decides who may issue it and what it may say. - Provision: 第二百三十一条 (Article 231)（共有の障壁の高さを増す工事） — address `art-231` - Text in force since: 2026-06-24 - URL (the page that opens at this provision): https://japanlaw.org/en/civil-code/art-231 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/129AC0000000089/art-231 - Every provision below carries its address and both URLs on the line under it. - Japanese text: e-Gov 法令検索, Digital Agency (デジタル庁). English: as marked on each line below. Only the Japanese as published by the government has legal effect; the text below is a copy of it. Every English rendering below is a translation and says which kind: the Ministry of Justice's translation, or this site's machine translation, whose model and date the Sources list names. They are never merged and never substituted for one another. --- ### 第二百三十一条（共有の障壁の高さを増す工事） — (Construction Work Raising Height of Co-Owned Walls) caption: Ministry of Justice translation — Japanese Law Translation Database System art-231 · https://japanlaw.org/en/civil-code/art-231 · https://japanlaw.org/l/129AC0000000089/art-231 **第一項** 相隣者の一人は、共有の障壁の高さを増すことができる。ただし、その障壁がその工事に耐えないときは、自己の費用で、必要な工作を加え、又はその障壁を改築しなければならない。 art-231/par-1 · https://japanlaw.org/en/civil-code/art-231/par-1 · https://japanlaw.org/l/129AC0000000089/art-231/par-1 One of neighboring owners may raise the height of a co-owned wall; provided, however, that if the wall cannot withstand the construction work, the relevant owner must reinforce that wall as necessary or rebuild the same at the owner's own expense. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 前項の規定により障壁の高さを増したときは、その高さを増した部分は、その工事をした者の単独の所有に属する。 art-231/par-2 · https://japanlaw.org/en/civil-code/art-231/par-2 · https://japanlaw.org/l/129AC0000000089/art-231/par-2 If the height of a wall is raised pursuant to the provisions of the preceding paragraph, the raised portion is owned solely by the owner that carried out the construction work. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-231/par-2: 前項 → 民法 第二百三十一条第一項 (Article 231, paragraph (1)), art-231/par-1 — https://japanlaw.org/en/civil-code/art-231/par-1 · https://japanlaw.org/l/129AC0000000089/art-231/par-1 ## Cited by 2 provisions cite this one. No official source publishes this direction. - 民法 第二百三十一条第二項（共有の障壁の高さを増す工事） — https://japanlaw.org/en/civil-code/art-231/par-2 · https://japanlaw.org/l/129AC0000000089/art-231/par-2 - 民法 第二百三十二条第一項 — https://japanlaw.org/en/civil-code/art-232/par-1 · https://japanlaw.org/l/129AC0000000089/art-232/par-1 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 民法 — the text in force from 2026-06-24 (https://laws.e-gov.go.jp/law/129AC0000000089/20260624_508AC0000000045), retrieved 2026-10-11 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Civil Code — Ministry of Justice translation (part 1 of 2) (https://www.japaneselawtranslation.go.jp/en/laws/view/4848/tb), retrieved 2026-10-11 - This site's parser, version 190 — 民法 — structure, counts, cross-references and defined terms, computed 2026-10-11