
New-build private residences
Ground-up English country and town houses commissioned by private clients and their architects—substantial properties of considered specification, delivered to programme.
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A family-run building firm based in Ickenham, undertaking new-build homes, house extensions and the sensitive refurbishment of period properties across West London, Buckinghamshire and Hertfordshire. In continuous practice since 1995.
For three decades, MJ Design & Building has worked alongside private clients, country-house architects and family offices to realise residences of singular ambition. Our remit is narrow by design—new-build private homes, period-property refurbishment and substantial extension—and is delivered with the discretion such commissions properly require.
Many of our projects are undertaken under non-disclosure. References are furnished in confidence to qualified enquirers, and to their architects and surveyors, upon request.
A house is built but once. We treat every commission accordingly.
We undertake commissions across England where craftsmanship, programme certainty and confidentiality are properly paramount.

Ground-up English country and town houses commissioned by private clients and their architects—substantial properties of considered specification, delivered to programme.
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Sensitive interventions upon Georgian, Regency, Victorian and Edwardian properties, including Grade II and Grade II* listed buildings where the appropriate consents apply.
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Whole-house remodelling, structural alteration, and side, rear or wraparound extension—coordinated as a single, programme-managed undertaking.
Learn more →One accountable contractor, one point of contact, and a programme that is honoured—whether the instruction comes from a homeowner, a design team or an investor.
Principal residences, family homes and period houses, delivered with the discretion and directness that private work requires.
A contractor that builds the drawings as intended, contributes at pre-construction, and protects the design through to handover.
New-build and refurbishment programmes priced with rigour and reported with candour—so that capital is protected and timelines are met.
Architecture is built by hand, by the men and women on site. Every other consideration follows from that one truth.
Joga Singh · Founder, established 1995
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. Photographed at handover.
More projects →An initial conversation, in confidence, to understand the site, the brief, the budget and the timetable.
Buildability review, cost planning and programme, prepared alongside your architect and engineer before a price is fixed.
Delivered by our own site management, with regular reporting on progress, cost and quality from start on site to completion.
Snagging, certification and a complete health and safety file—the house delivered as it was promised.

Founded the practice and remains principally engaged on every commission of consequence.

Advises on commercial direction, client relations and the firm’s longer-term institutional development.

Directs project delivery across the firm’s active sites and the supply chains that serve them.

Manages live commissions across the regional portfolio, with particular regard to programme and trade coordination.
We accept a limited number of new instructions each year. Initial conversations are held in confidence and without obligation.