Extraordinary Extensions

Tinie checks out Amy and Simon's million-pound glass structure by the sea in Hampshire, and Alan and Lynda's multigenerational living under a bold, angular ski slope roof in Herefordshire.

Tinie meets a couple who are building an enormous subterranean extension on their Grade II listed gate lodge, and visits an £11 million mega-basement in Knightsbridge.

Tinie meets a couple who've added a modern, uncompromising 21st-century extension to their 17th-century Cotswolds cottage, and checks out a unique up-and-over arch window.

Tinie checks out a pioneering transformation and reinvention of a 19th-century former timber yard in south London into a high-tech, modern, ultra-energy-efficient family home.