Helical plc and Ashby Capital have let the eighth floor comprising 15,484 sq ft of office space at The JJ Mack Building, 33 Charterhouse Street, EC1 on a 15 year lease to Three Crowns, a leading international arbitration law firm. The firm plans to relocate from its existing offices at New Fetter Place in early 2025. The recently developed building provides a total of 200,611 sq ft of office space across 11 floors, alongside 5,439 sq ft of ground floor retail.

It is rated EPC A and is anticipated to receive both a BREEAM Outstanding rating and a NABERS 5 assessment for energy in use. Incorporating market-leading technology within the building enables tenants to easily manage their ambient environment. Tenant amenities include 426 cycle spaces and high-quality showers and changing rooms. This letting comes shortly after it was announced that J Sainsbury has taken the first, second, and third floors of the building, comprising 68,002 sq ft.

With the sixth and seventh floors, totalling 37,880 sq ft, let to Partners Group and the 13,408 sq ft ninth floor let to Corio Generation, part of the Macquarie Group, The JJ Mack Building is now 67% occupied. The building takes its name from the grocery store formerly located on the corner of the site, owned by JJ Mack, a market trader whose career started with just a street barrow. It sits opposite the Victorian Smithfield Markets Building, which is undergoing extensive refurbishment and restoration to become the new Museum of London.

Farringdon Station, one of the best-connected stations in London following the opening of the Elizabeth Line, is just 150 yards away.