Sharecast / Pexels via Pixabay Around one third of new homes in London failed to sell to private buyers last year, underlining the scale of the housebuilding challenge facing incoming mayor Andy Burnham, according to the Telegraph. CBRE analysis of Molior data showed developers abandoned attempts to sell 34% of new units in 2026 after failing to find buyers, up from 25% in 2025. Instead of going to private purchasers, the homes were offloaded to investment funds or housing associations.