Prime Sash Windows is a London-based specialist in bespoke timber sash windows, casement windows and doors, with over a decade of experience manufacturing and installing handcrafted timber windows for homeowners, architects and developers across London and the surrounding region. FENSA registered, PAS24 security certified, and a member of The Joinery Network and Made in Britain, the company builds every window by hand in its own workshop near London using premium hardwood, Accoya and oak, and installs them using FENSA-certified installers. Their proprietary Passive Glass technology achieves U-values as low as 0.8 W/m²K, making them a technically serious choice for architects navigating Part L compliance on heritage and conservation projects.

CC Construction Group is a London-based super prime residential building firm with nearly thirty years of experience delivering the finest construction and aftercare services to private clients across London and the southern counties. Operating through four specialist divisions, CC London, CC Country, CC Bespoke and CC Maintain, the group manages high-quality custom projects of all scales, from ultra-modern new builds and complex structural works to high-end fit out and sensitive residential refurbishments, drawing on deep relationships with leading architects, interior designers and industry professionals built over three decades of consistent delivery at the very top of the residential market.