Energy conservationist Andrew plans to build a radical, self-heating home by storing the warmth of the summer sun into insulated earth banks. But will this gigantic thermal experiment work?.

Grand Designs Season 21 Episodes...

• s21e01 - South West London: Cemetery Keeper's Lodge
• s21e02 - Kent: Converted Barn
• s21e03 - South Lincolnshire: Contemporary Dutch-Style Barn House
• s21e04 - Bletchley: Self-Heating House
• s21e05 - Liskeard, Cornwall: Derelict Flour Mill Conversion
• s21e06 - East Sussex: Modern Country House: Revisited

Grand Designs Show Summary

Grand Designs is a Channel 4 TV series covering unusual architectural house-building projects, presented by Kevin McCloud.

The properties featured in the series vary wildly from homes underground to converted water towers, with the only common factor being that they're all rather unusual or extravagant in some way.