Tel: 020 7229 9541

Key People

Headshot of Marvin Blunstone

Marvin Blunstone

Managing Director

Marvin is Capstones affable oracle of building knowledge. A Quantity Surveyor with over 40 years experience, the last 30 years extensively involved in conversion, refurbishment, basement and structural works. Having completed an indentured training scheme with Mowlems where he was awarded an “Outstanding Achievement & Excellence” CITB award he went on to spend time with Main Contractors Ashby & Horner and Wiltshire before going on to work as an integral part of a small family business specialising in numerous Housing Association conversion and refurbishment projects. He then went on to work with Archer-Hoblin where he spent 14 years building a business with an enviable reputation in the high end residential refurbishment market before joining Capstone in 2009

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 2009 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