Grandspire Developments

Grandspire Developments is a local building company specialising in house extensions, garage and loft conversions and bathroom refurbishments in Brackley, Bicester, Banbury and surrounding areas. We organise the whole job, so you don't have to chase different trades or manage the schedule yourself. We cover the main trades most homes need, decorating, carpentry, plumbing and general maintenance, available as one-off jobs or as part of larger projects.

Run by builders with over 15 years of experience on UK building sites, from small private jobs to large-scale sites for major developers, Grandspire Developments focuses on quality through planning, communication, and doing things properly the first time. We aim to be the best version of ourselves on every job, show up, do what we say, keep you informed, and deliver work we're proud to put our name on. We offer a straightforward service with transparent quotes and quality work that lasts.

We handle the full process for extensions, conversions, and refurbishments, coordinating all trades and ensuring work is carried out to UK building regulations. We provide clear, itemised quotes with no hidden extras and a tidy, professional finish.