Tel: 020 7229 9541

Key People

Headshot of Marvin Blunstone

Marvin Blunstone MCIOB

Managing Director

Marvin is Capstone’s affable oracle of building knowledge. A Building Surveyor with over 35 years experience of basement construction and structural works. He trained at Mowlems where he was awarded an “Outstanding Achievement & Excellence” CITB award. He went on to mastermind Ashby & Horner’s flagship Norfolk Hotel refurbishment in South Kensington, and a distinguished career has included working for WIltshires, Circleworth and Archer Hoblin.

Simon Dempster

Simon Dempster ICIOB

Contracts Director

Simon has a friendly but meticulous approach. He has worked at KIER Ltd. and has 28 years experience in Construction Management. He has overseen numerous flagship projects across London including the £8m refurbishment of the Stafford Hotel in St James.


Ross Blunstone



Capstone was established in late 2007 when Rory Watson, a Chartered Surveyor who trained at Savills, started working with one carpenter doing small residential building jobs, with a focus on earning a reputation for speed, quality and reliability.
Marvin Blunstone joined the business in 2011 as Commercial Director and took full control of the company in January 2019.
The firm has built an enviable reputation for integrity and excellence and has completed 169 projects ranging up to £3.5M based on robust financial control, combined with a personable and can-do approach. The firm moved into their new office at Clarendon Cross, Notting Hill in early January 2012.


Capstone have teamed up with Powerday Waste Management and Recycling to ensure that the waste we produce is 100% diverted from landfill.

Powerday’s highly efficient waste management service is the best in the business and reflects Capstones commitment to the environment. We work closely with Powerday to help us to ensure we meet our own environmental targets and that our waste is managed as efficiently as possible.

Key Documents & Certificates

Considerate Contractors Certificate Considerate Contractors Award Certificate
Considerate Contractors Certificate Considerate Contractors Award Certificate
Waste Management