• 1-9 Seymour Street, London
  • 1-9 Seymour Street, London

1-9 Seymour Street

1-9 Seymour Street is a mixed use development for The Portman Estate on the site of a former police station. Following a Feasibility Study in 2012 a viable proposal of commercial (office and restaurant), private residential and community use was developed with a complex urban section between Seymour and Bryanston Streets.

7 Seymour Street offices are on five floors delivering 3,000 sqm (32,000 sqft) of Cat A space with cycling amenities in the lower levels. The typical floorplates are 605 sqm (6,550 sqft) and column free with dual aspect to the street and shared court.

9 Seymour Street will be a restaurant on ground and lower ground levels. The community use is provided with an entrance on Bryanston Street to three floors including a triple height volume for an assembly hall. This development is an important component in The Portman Estate’s programme of improvements that, with the Baker Street Quarter Partnership, are transforming this area between Marylebone, Oxford Street and Hyde Park.



  • Project name: 1-9 Seymour Street
  • Client: The Portman Estate
  • Location: London
  • Contract Value: £50m
  • Completion Date: September 2018


  • Artist: Antoni Malinowski
  • Project Manager: Avison Young