Fraser Bond are the leading lettings and property management agents for 5-6 St James's Square - London SW1Y. 5-6 St James's Square is a mixed-use building in the heart of St James's, London SW1. The Grade II* listed office building was originally a mansion built in the 1700s for William Wentworth, 2nd Earl of Strafford. The multi-let property comprises 16,183 sq ft net (22,761 sq ft gross) of the highest quality office accommodation and has achieved some of the top rents in London. The building comprises: - 13 residential units - Art Gallery Rio Tinto HQ after the redevelopent by Exemplar in 2013..