In 1807 Picton let his Kingston properties and moved to a rented house in Tolworth, perhaps marking his retirement aged 52 from active trade. He was by then described in deeds as a "gentleman" and by 1816 he bought a house with a large garden in Thames Ditton for an above-average £4,000. He died in 1836 at the age of 81 and is buried in All Saints Church, Kingston upon Thames. He was evidently a very large man as a four-wheeled trolley was needed for the coffin.