The Crown and Treaty, originally named ‘Place House’ was originally owned by the Bennet family in the 1630s and was occupied by a Mr Carr in 1645. The house passed to the Wentworth Garneys in 1689, Charles Gostlin in 1724 and later Doctor Thorold.

The central wing of the house was demolished in the 18th century. This is also when the name of the building was changed to ‘The Crown’. In 1924 panelling was removed from one room and installed in the Empire State Building, New York. It was returned to the Queen as a coronationgift, then re-installed. Uxbridge was chosen for the negotiations because of its location – between the King’s headquarters at Oxford and Parliament's in Westminster. The discussions were scheduled from 30 January to 22 February 1645.

The Treaty sought to discuss Parliamentary proposals including reform of the church, control of the army, and conflict in Ireland. At the heart of these proposals was a power struggle between Parliament and the King. The negotiators filled the town, the Royalists on the south side of the High Street, Parliamentarians on the north side. Discussions were held at Place House, part of which survives as the Crown and Treaty public house today. The Treaty failed, partly due to restrictions on time, partly to inflexibility on both sides. The following year, a string of lost battles led to the King’s eventual surrender.