Musician-turned-property guru Tinie Tempah follows British homeowners as they realise their dreams by embarking on ambitious home extensions. He begins by the sea in Hampshire, where teacher Amy and professional gambler Simon set out to breathe new life into three derelict buildings with one, uncompromising giant glass structure. He also visits retired couple Alan and Lynda in Herefordshire, who are creating a bold extension with an angular ski slope roof to house Alan's elderly father.

Tinie Tempah follows two homeowners who are digging down on their quest to unearth extra space. In Hertfordshire, one couple plan to double the footprint of their Grade II listed gate lodge to the size of three double decker buses with an enormous subterranean extension. The second one - an £11million basement in the heart of Knightsbridge - was home to ballerina Margot Fonteyn and the former Panamanian Embassy.

In Warwickshire, a couple attempt to add an eco-friendly pool and spa to their curved mega-home. Tinie also visits two other super-luxe subterranean extensions devoted entirely to lives of leisure.

Tinie follows a couple adding a glass box mega-extension to their classic country pile in Manchester, and a couple hoping to make their big design dreams come true in London

Tinie Tempah follows the pioneering reinvention of a Victorian building in south London. Architect Richard and his writer wife Eva are converting their 19th-century former timber yard from an office into a family home for themselves and their two children. Key to the design are the cutting-edge innovations to achieve ultra-low energy use, making this the only passive house that has been built by converting a commercial space

Tinie meets a Silicon Valley tech entrepreneur who's letting a graffiti artist loose on his Victorian house in Peckham. And can a couple extend their distinctive 1960s Essex home without ruining it?