
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-led English practice undertaking new-build country homes, the sensitive refurbishment of period properties, and substantial extension across Greater London and the Home Counties. In continuous private practice for three decades.
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.
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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.
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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.