Areas / Mayfair

Architects and Engineers in Mayfair

Contemporary architecture and engineering across Mayfair's layered Grosvenor Estate streets, from first feasibility to a finished project.

Living and Building in Mayfair

Mayfair wears a deceptive face: a single Georgian-looking terrace might conceal centuries of change, original 1720s townhouses around Grosvenor and Berkeley Squares, Victorian Italianate reclads, Queen Anne and Arts and Crafts fronts, and neo-Georgian insertions after the First World War.

Diagram X works fluently across that layered history, trading in confident, contemporary AEC (Architecture, Engineering, and Construction) rather than pastiche of any single era.

Red-brick Queen Anne Mayfair townhouse with a frameless glass gallery frontage and glazed roof addition between Georgian neighbours

Planning in Mayfair

Almost the whole district sits within the Mayfair Conservation Area, with 44 Grade II* and numerous Grade II listed buildings, still managed under Grosvenor Estate consent alongside Westminster planning permission.

Mixed residential and commercial use adds a further layer, meaning a scheme's planning case often turns on current and proposed use as much as on the building's fabric itself.

Brown-brick Georgian Mayfair townhouse directly beside a contemporary pale limestone building with deep-set glazing

Refurbishing in Mayfair

Behind a Georgian, Victorian, or neo-Georgian facade, often more than one in the same building's history, Diagram X opens up dated, compartmentalised floorplates into minimalist, light-filled space, honest materials replacing applied period decoration.

What the street sees stays true to Mayfair's evolving character, while what's lived in inside is unmistakably contemporary.

Minimalist pale stone living space with a square-edged linen sofa and sash windows onto a Mayfair garden square

Construction in Mayfair

Dense commercial frontages, basement works beneath some of London's most tightly packed listed terraces, and Grosvenor Estate oversight demand meticulous sequencing on almost every project.

Diagram X coordinates structural engineering, waterproofing, and delivery as one process, protecting the historic street scene above while new, minimal-footprint space is built in behind it.

Double-height steel and glass rear wing with granite island, looking onto Georgian brick rear elevations in Mayfair

Planning a Mayfair Home Project?

Learn more about how Diagram X supports homeowners with extensions, refurbishments and listed building work.

Property Services