Mansfield Street, Marylebone, W1G

Property Summary

This Grade II* listed nine-bedroom townhouse on Mansfield Street occupies a prominent position within one of Marylebone’s most architecturally distinguished terraces, designed by Robert and James Adam and built by John Hobcroft in the 1770s. Arranged over multiple floors served by a passenger lift, the house extends to approximately 13,237 sq ft and retains significant original features including Adams mouldings, a spectacular cantilevered staircase beneath a glass dome, and exceptionally high decorated ceilings to the principal reception rooms. The ground floor provides a grand entrance hall, reception room, kitchen with island and breakfast area, boot room and prep kitchen, all opening onto a private rear garden with garage access via Duchess Mews. The first floor houses the drawing room, dining room, study and library. A substantial principal bedroom suite with dressing room and separate shower room occupies the second floor, while the third floor accommodates five further bedrooms, three bathrooms, a sitting room and a secondary kitchen. The lower ground floor contains a gym and a self-contained apartment. The white stucco facade with its Roman Doric column doorway marks a house of genuine historical significance, notably as the birthplace of biochemist Rosalind Pitt-Rivers. Bond Street, Mayfair, Marylebone Village, Regent’s Park and Hyde Park are all within immediate reach.

Key Features

• Grade II* listed Robert and James Adam terrace house, built 1770s
• Approximately 13,237 sq ft across multiple floors
• Nine bedrooms and six bathrooms
• Spectacular cantilevered staircase with original glass dome
• Original Adams mouldings and exceptionally high decorated ceilings
• Drawing room and dining room on the first floor with ornate period detail
• Principal bedroom suite with dressing room, bathroom and separate shower room
• Ground floor reception room, kitchen with island and informal breakfast area
• Self-contained apartment on the lower ground floor
• Private gym on the lower ground floor
• Study and library on the first floor
• Paved rear garden with outdoor dining space
• Garage accessed via Duchess Mews
• Passenger lift serving all floors with secondary rear staircase
• Leasehold with 123 years remaining

Design Comment

Mansfield Street represents one of the Adam brothers’ most refined London compositions, and this house — with its white stucco facade and Roman Doric entrance — is a property of considerable architectural gravitas. The retention of original Adams mouldings, the glass-domed staircase and the generously proportioned first-floor reception rooms provide an authentic Georgian framework that would reward a carefully considered interior design scheme of the highest calibre. At over 13,000 sq ft, the scale of the house offers genuine flexibility in how spaces are configured and appointed.

A new custodian may wish to consider a comprehensive interior refurbishment that honours the listed fabric while introducing contemporary comforts at every level. The principal bedroom suite on the second floor, already expansive, could be reimagined with bespoke joinery, integrated lighting design and material selections that complement the period architecture — stone, bronze, hand-finished plaster and specialist decorative paint finishes would all be sympathetic choices. The first-floor drawing room and dining room, with their exceptional ceiling heights, present an opportunity for statement lighting, curated art placement and furnishing schemes that respond to the proportions of the rooms.

The lower ground floor gym and self-contained apartment offer scope for a home spa or wellness suite, a private cinema or staff accommodation, subject to listed building consent. The rear garden and Duchess Mews garage access introduce practical considerations around landscaping, secure parking and potential mews-level reconfiguration. Any works to a Grade II* property will require close liaison with the local planning authority, and Janine Stone & Co. has extensive experience in delivering high-specification design projects within listed buildings of this calibre.

Development Consultations

To assist potential buyers of this property to understand their full design and development options, Janine Stone & Co. is able to provide complimentary design concept and development consultations. It can be arranged for these consultations to take place at the property or in our London studio. Janine Stone & Co. will provide guidance on architecture, refurbishment and planning considerations, in addition to helping interested parties to develop their early design ideas into floor plans with estimated project costs and timelines for realisation.

Should a successful acquisition take place, we would be happy to take these initial concepts through to a full concept and subsequent planning, design and build phases.