With many years of experience, Blackstone Construction & Design are well-established as the first choice contractor for clients in London, Harrow and Hertfordshire. Whatever your budget or requirements, we can take your construction from plan to finished product, always on budget and, as often as possible, to schedule. We have a team of experts who are specialists in their field, and are also members of the Federation of Master Builders. We only employ the most experienced and highly trained professionals.