Following some of Britain's most ambitious self-builders as they attempt to construct their dream homes, the long-running British TV show Grand Designs has been a source of property inspiration since 1999. For more than 25 years, the programme has showcased countless amazing properties, so we've taken a look back through the archives to find the grandest Grand Designs projects of all time.

From a striking treehouse that was built around 27 protected trees to a modern metal home constructed on an active airfield, these homes are sure to delight and inspire.

Click or scroll on to step inside...