UK homebuilder Persimmon raises 2026 completion forecast, warns costs may delay margins

British homebuilder Persimmon forecast about 12,500 home completions for 2026 but warned Iran-war-driven cost inflation could delay its medium-term margin targets. Shares rose over 4% as underlying H1 pretax profit gained 3% to £170.1 million and completions rose 13% to 5,189 units. Persimmon estimated a £40-50 million inflation hit over 18 months, with savings covering at least half. With easing demand, elevated mortgage rates and soaring energy prices, Persimmon keeps investing selectively while rivals cut buying. CEO Dean Finch called its 20% margin goal "a big leap" but remained confident.