M J Design & Building Ltd · Company 10227957 · Trading heritage since 1995
Active, accounts up to date·main contractor·Head office Uxbridge
MJ Design & Building is a family-led English practice established in 1995, specialising in new-build private homes, sensitive refurbishment of period properties, and substantial extensions. Operating across Greater London, the Home Counties, and the English shires, the firm focuses on commissions where craftsmanship, programme certainty, and confidentiality are paramount. They pride themselves on a hands-on approach, engaging directly with clients, country-house architects, and family offices to realise residences of singular ambition.
Many projects are undertaken under non-disclosure agreements, with references furnished in confidence upon request. The practice maintains a narrow remit, delivering new-build country and town houses, interventions on Georgian, Regency, Victorian, and Edwardian properties (including listed buildings), and whole-house remodelling or extensions. They emphasize discretion, craftsmanship, programme certainty, compliance with regulations like CDM 2015, and continuity, being a family practice in its second generation.
Their team comprises directly engaged English tradesmen and carefully selected specialist subcontractors, ensuring high standards of delivery and site supervision.
Buckinghamshire
A substantial new-build family residence upon a private plot in the English Home Counties. Hand-laid red brick, English bond, leaded roof, complete mechanical and electrical infrastructure and bespoke interior fit-out throughout.
Buckinghamshire
Substantial new-build family residence on a private plot. Stone-faced principal elevation, leaded roof, mechanical and electrical infrastructure throughout, and bespoke interior fit-out.
Northwood
Extensive remodelling and rear extension of a substantial Edwardian villa. Reformed principal rooms, new master suite and full M&E renewal.
Hertfordshire
Replacement family home on a generous private plot. Brickwork to a traditional specification, leaded windows, gravelled forecourt.
Ealing
Comprehensive refurbishment of a substantial Edwardian property. Reconfigured plan, new principal kitchen and bespoke joinery throughout.
Ickenham
Substantial side and rear extension. New principal kitchen, garden room and orangery, reformed first floor and roof works.
Beaconsfield
Replacement principal residence with stone detailing, principal staircase, and full bespoke fit-out throughout.
This profile was compiled from public records. Claim it to add the things buyers ask for:
Family-led practice undertaking new-build private residences, heritage refurbishment and major extension across Greater London and the Home Counties. In practice since 1995. Their listed services include Main contractor, Refurbishment, Extensions, Restoration & heritage and Fit-out & interiors.
M J Design & Building Ltd is registered at 19 Copthall Road East, Ickenham, Uxbridge, UB10 8SD, in London.
M J Design & Building Ltd states that it works across London, Home Counties and England.
Accounts filed for the year to 2025 report 10 employees, which places the company in the 10-49 employees band.
M J Design & Building Ltd does not disclose turnover: UK small-company accounts are not required to. Based on headcount in its filed accounts, turnover is likely to fall between £720k and £1.9m. This is an estimate, not a filed figure.
Companies House lists M J Design & Building Ltd as active, with accounts most recently made up to 2025-06-30.
M J Design & Building Ltd displays CDM 2015, NHBC, FMB, CHAS, Considerate Constructors and TrustMark on its website.
M J Design & Building Ltd works in Residential.
M J Design & Building Ltd was incorporated on 2016-06-13, though the company says it has traded since 1995.
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