4 Bentinck Street is a mid-terrace commercial office building in the Harley Street Conservation Area. It sits between Nos. 2 and 5 Bentinck Street and extends through to Bentinck Mews. This central London location offers both prestige and accessibility, surrounded by a mix of residential and commercial properties.

The building rises six storeys to Bentinck Street, four storeys to Bentinck Mews, and three storeys to the central link. Its structure uses a steel frame with concrete slab floors, brick facades, and steel curtain walling. The roof design combines single-ply membrane, green roofing, and metal sheet finishes, giving it both resilience and variety.

The refurbishment upgraded office areas, WC facilities, and shared spaces. For example, the team installed a new steel staircase linking the ground and lower ground floors. In addition, they introduced a shower facility and expanded cycle storage to promote sustainable commuting.

The reception also underwent a major transformation. It now features bespoke joinery, a dedicated WC, and a modern kitchenette, creating a welcoming first impression. Moreover, the mechanical and electrical systems were fully upgraded, improving energy efficiency and compliance with modern standards.

Externally, sustainable features were added. A new green roof sits above the second-floor rear offices, while an additional terrace provides outdoor space on the existing green roof. These enhancements support both biodiversity and user wellbeing.

Finally, the team completed full internal and external repair and redecoration. As a result, the building now delivers flexible, high-quality office space while retaining its historic character.

Through careful planning, sustainable upgrades, and skilled craftsmanship, the 4 Bentinck Street office refurbishment demonstrates best practice in central London. It balances modern workspace needs with the conservation requirements of this historic area.