Mel Giedroyc hosts as talented, good-with-wood craftspeople compete to be crowned Britain's best woodworker by award-winning architect Alex de Rijke and queen of furniture making Helen Welch
The search for Britain's best amateur interior designers. Working in a variety of architectural styles, the contestants have three days to impress both the judges and the homeowners.
Grand Designs: Trade Secrets was a spin-off broadcast immediately after the main Channel 4 show each week for series 7 & 8. Acting as a companion piece, it gave hints and tips about building and showed some "behind the scenes" material from the week's show. Trade Secrets series 1, is a companion for Series Seven of Grand Designs, and Trade Secrets series 2 is a companion for Series Eight.