Adam and Tassy take on an abandoned water tower - a concrete column stretching over 20 metres into the Northamptonshire sky - and turn it into a fun family home.
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.
Grand Designs - Northamptonshire 2024 Synopsis and Schedule