Greater Manchester spatial framework documents on the GMCA portal show that in the next 20 years there will be a need for 1,360,000(m2) of new office floorspace in Manchester, 415,000(m2) in Salford & just 675,000(m2) for the other eight Greater Manchester authority areas combined: Bolton, Bury, Oldham, Rochdale, Stockport, Tameside, Trafford & Wigan.