The Chandos Mausoleum is attached to the north side of the church of St Lawrence Whitchurch, which is sited at the southeast corner of Canons Park in the London Borough of Harrow, England. It was built for the 1st Duke of Chandos in 1735, and designed by James Gibbs. The church is an active Anglican parish church, and the mausoleum is vested in the Churches Conservation Trust. The church is designated by English Heritage as a Grade I listed building.
The interior walls of the mausoleum are decorated with paintings in trompe l'oeil style by Brunetti. It contains memorials to members of the Chandos family. On the west wall is a sculptured monument to the 1st Duke showing him in a wig dressed as a Roman citizen. This figure is flanked by plain pilasters outside which are the kneeling figures of his two wives, Mary and Cassandra. There are two monuments on the south wall. One is a black sarcophagus against a white pyramid to the memory of Mary, the wife of the 1st Marquess of Carnarvon, who died in 1738. It was designed by Sir Henry Cheere. The other is a white sarcophagus to Margaret, the Marchioness of Carnarvon, who died in 1760.
- Baker, T. F. T.; Pugh, R. B., eds. (1976), "Little Stanmore: Church", A History of the County of Middlesex, Victoria County History (University of London & History of Parliament Trust) 5: 122–124, retrieved 18 May 2011
- St Lawrence Little Stanmore Whitchurch, Canons Park, Church of England, retrieved 18 May 2011
- Chandos Mausoleum (St Lawrence's Church), Little Stanmore, London, Churches Conservation Trust, retrieved 18 May 2011
- English Heritage, "Church of St Lawrence, Whitchurch Lane, Harrow (1194471)", National Heritage List for England, retrieved 18 May 2011.