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.

Tinie Tempah follows two builds that sit uniquely in their surroundings, meeting contractor Rod and his gin distiller wife Clarice, who have added a modern and uncompromising 21st-century extension to their 17th-century Cotswolds cottage. Tinie also follows passionate extenders NHS surgeon Humza and his banker wife Pari, who indulge their creative flair, attention to detail and love of terrazzo with a unique up-and-over arch window.

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.

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 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?

In Lincolnshire, Tinie meets a couple adding not one - but three! - mega extensions to the home of their dreams. In Hertfordshire, a newly qualified architect builds for his first clients: his family!

On the Kent coast, Tinie follows one couple plundering their wedding fund to create a Miami-style beach house, and another turning their 1960s home around to face the sea.

In London, Tinie follows two couples: one building the wellness extension of their dreams and another adding a floating terracotta pod to their rundown 1930s home.

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 British homeowners as they realise their dreams by embarking on ambitious home extensions. Here he joins a couple of art deco obsessives as they try to transform their typical west London terraced home into a Great Gatsby-inspired 1920s palace. And on the Norfolk Broads, he meets a family risking the picture-perfect look of their thatched cottage by adding an experimental eco-extension inspired by their love of sailing.

Tinie Tempah meets a couple who have gambled £3.5 million to turn their Surrey home into a Marbella-inspired luxury party resort - complete with dance floor, pool house, wellness space, firepit and outdoor kitchen. Tinie also catches up with a couple with a fraction of the budget, who are trying to bring a taste of experimental Chinese timber architecture to their terraced home in south-west London.

Tinie Tempah follows a couple as they renovate an old Canterbury B&B by adding an extension that uses a mix of styles inspired by their Korean and Norwegian heritage. But the discovery of a Second World War bomb shelter in their back garden adds a surprise element to the project. He also follows a Miss Vintage UK finalist who fantasises about turning her Nottingham dormer bungalow into a 1960s Hollywood time capsule.

Tinie Tempah meets a Croydon couple who are building the barn extension of their dreams, inspired by their passions for cars and crafts. He also revisits a Victorian property in Manchester featured in the last series, to see whether its glass box extension has been a success after years of construction drama.