Ten years for structural defects, three years for defects that make the home unfit to live in, and one year for finishes, against the builder only. All three run from the date the works were signed off. Separately, once a covered defect appears you have two years to bring the claim, counted from when the damage occurred. The regime applies to buildings whose planning permission was applied for on or after 6 May 2000.
Where this comes from: art. 17.1 Ley 38/1999 (LOE), BOE consolidated text, read 2026-09-10; art. 18.1 Ley 38/1999 (LOE), BOE consolidated text, read 2026-09-10; disposicion transitoria primera, Ley 38/1999 (LOE), BOE consolidated text, read 2026-09-10.