UK listed residential property company Grainger has said its joint venture vehicle with property development and investment group Helical Bar has exchanged contracts with the London borough of Hammersmith & Fulham for a major mixed use development. The planned development is in an area around Hammersmith Town Hall and Grainger said the project is expected to have an end value of about £180mln (EUR 231mln). A planning application should be submitted in late 2008.