"Before you had to hunt for things through friends or contacts, " Hernan Mayor explains, as he loads roofing material onto the back of his bike at The Wonder buildersyard.
Last week, seven families submitted a temporary application to redevelop a builders' yard on Eaves Green Lane for eight caravans and timber sheds for toilets, showers and cooking facilities.
Yard-sharing is rare in new developments of single-family homes, big builders say, with privacy fences often required under community covenants and building codes.