Introducing 50 Eastcastle Street
50 Eastcastle St is a landmark refurbishment in London’s West End. Located in Fitzrovia Quarter, this warehouse-style building is undergoing a comprehensive CAT A transformation, delivering circa 46,000 sq ft of design-led workspace in W1.
Completing in Q2 2026, the scheme forms part of The Langham Estate’s £50 million investment programme and will offer one of the largest single office floorplates of its kind in the West End.
A landmark warehouse reimagined for modern business
Originally occupying the site of the Princess Theatre, 50 Eastcastle Street blends historic character with contemporary performance.
The building retains its bold industrial aesthetic while introducing:
- CAT A refurbished floors
- Floor-to-ceiling heights of up to 3.5 metres
- Generous windows delivering exceptional natural light
- Modern mechanical and electrical infrastructure
- Enhanced sustainability credentials
Designed by Pitman Tozer Architects, the transformation carefully preserves original textures and architectural details while adapting the space for the future of work.
Flexible floorplates from 8,288 to 24,204 sq ft
The building provides flexible accommodation across three office floors:
- 1st Floor: 13,135 sq ft (1,220 sq m)
- 2nd Floor: 24,204 sq ft (2,249 sq m)
- 3rd Floor: 8,288 sq ft (770 sq m)
- Total Office Space: 45,627 sq ft
The second floor offers one of the largest continuous floorplates in W1 — a rare opportunity for occupiers seeking a substantial single footprint in the West End.
Sustainability and performance credentials
Sustainability is central to the refurbishment. Key credentials include:
- EPC B rating
- 22% reduction in energy usage
- Significant reduction in gas consumption
- All-electric building (available space)
- LED lighting throughout
- Pre-accredited WiredScore Gold
The scheme reflects The Langham Estate’s long-term commitment to sustainable, future-proofed commercial space in Fitzrovia.
End-of-trip facilities and connectivity
Designed for today’s workforce, the building provides high-quality end-of-trip facilities, including:
- Dedicated cycle entrance
- Secure cycle storage for up to 28 bicycles
- Changing rooms with 90 lockers and drying room
- 3 male and 3 female showers
- Dual fibre resilience
- Commissionaire and refurbished receptions
These features position 50 Eastcastle Street as a workplace tailored for active commuting and hybrid working models.
Part of The Langham Estate’s £50m investment programme
The refurbishment of 50 Eastcastle Street forms part of The Langham Estate’s wider £50 million investment across Fitzrovia Quarter.
The Estate spans 11.3 acres of prime commercial, retail and residential space in the West End and continues to cultivate a thriving, sustainable and commercially competitive neighbourhood.
A rare West End opportunity
If you’re searching for office space in Fitzrovia that balances heritage character with modern performance, 50 Eastcastle Street deserves a closer look.
Discover floor availability, specification details and leasing information on the official page: