Threefold Architects

  • Retrofit, St James

Threefold is reimagining a prominent Grade II-listed office building in the heart of St James’s, delivering a comprehensive refurbishment that creates a best-in-class contemporary workplace while celebrating and enhancing the building’s historic character.

The proposals combine the refurbishment of office accommodation with enhanced amenities, improved accessibility, and new building services, creating a high-quality, future-ready commercial environment with sustainability at its core.

Drawing inspiration from the rich architectural character of St James’s, the interiors reinterpret the building’s heritage through a restrained palette of Portland stone, crafted timber joinery, leather detailing and bespoke finishes. Subtle references to the building’s historic dentil ornament are woven into the contemporary design, creating a workplace that feels calm, timeless and deeply rooted in its context. Alongside a fully electric heating strategy and significant environmental improvements, the refurbishment delivers a refined and enduring workplace that balances heritage, craftsmanship and long-term performance.

Client: The Crown Estate

Type: Office

Area: 17 300 sq ft

Status: Design Development