DESIGN – PLANNING – EXTENSIONS – RENOVATIONS

At Cornerstone Build by Design, previously Cornerstone Ascot, we pride ourselves on being trusted local builders serving homeowners across Ascot, Berkshire and Surrey. Our reputation is built on core values of trust, integrity, transparency and reliability – ensuring every project is handled with the highest level of professionalism

Experienced builders in Berkshire & Surrey

We’d be delighted to discuss your ideas & bring your vision to life.

Whether you’re planning a home renovation, a bespoke house extension, or want to transform your living space, our expert team delivers exceptional results with meticulous attention to detail.

Why Choose Cornerstone Build by Design?

  • Local expertise – Experienced builders in Ascot, serving clients across Berkshire & Surrey.

  • Full service – From architectural design & planning permission to interior design & project delivery.

  • On time & on budget – Reliable project management that keeps everything running smoothly.

  • Trusted reputation – Built on core values of honesty, integrity, and transparency.

  • Attention to detail – Every renovation, extension, or new build is completed to the highest standard.

Interior & Building Refurbishment in Mayfair London

About Us

The Journey

Projects

“ From architectural design and planning permission to interior design and full project management, we offer a complete building service tailored to your individual needs. Every project is delivered on time, within budget, and with open, honest communication throughout. ”

Simon Chapman – Director

Some kind words

Customer satisfaction is of the utmost importance for us at Cornerstone Build by Design.

There was nothing the Cornerstone team couldn’t handle and thanks to them the project was finished in a timely manner and exceeded my expectations.

Refurbishment in Fulham

Cornerstone Build by Design set us at ease with their professional and welcoming team of highly skilled trades who achieved a finish to our project beyond our expectations.

Building Project in Mayfair London

Simon is brilliant at communication and made sure that we were happy with the work every step of the way.

For our Builders in Ascot

Their workmanship is second to none the projects ran smoothly from start to finish with great communication throughout, highly recommend!

Various Building Projects