The only changes made by Soane that are certain are those he made to the front elevation. A comparison between Brettingham's drawing ( ) and a photograph published in Survey of London, Parish of St. James Westminster, Part 1: South of Piccadilly, volume XXX, 1960 (fig.191b) shows Soane's changes to the window details, the exchange of Ionic for Corinthian for the porch which was now enclosed and the addition of a cast iron balcony.
In 1797 Soane carried out repairs for the Duke of Leeds to North Mymms Park, Hertfordshire, adding a dairy and greenhouse. The Duke died in 1799 and his town house was sold - at a considerable loss - and remained vacant for some years. In 1936 it was pulled down and replaced 'with a facsimile elongation of the neighbouring Adam elevation' (Dean, p.228).
Soane later publlished his design for 21 St James's Square in Designs for Public and Private Buildings, 1828, ff. 46-54.
Literature. F.H.W.Sheppard (general editor), Survey of London: The Parish of St James Westminster. Part One: South of Piccadilly, 1960, pp.174-181, figs 191-3; P.Dean, Sir John Soane and London, 2006, p.228
Sir John Soane's collection includes some 30,000 architectural, design and topographical drawings which is a very important resource for scholars worldwide. His was the first architect’s collection to attempt to preserve the best in design for the architectural profession in the future, and it did so by assembling as exemplars surviving drawings by great Renaissance masters and by the leading architects in Britain in the 17th and 18th centuries and his near contemporaries such as Sir William Chambers, Robert Adam and George Dance the Younger. These drawings sit side by side with 9,000 drawings in Soane’s own hand or those of the pupils in his office, covering his early work as a student, his time in Italy and the drawings produced in the course of his architectural practice from 1780 until the 1830s.
Browse (via the vertical menu to the left) and search results for Drawings include a mixture of Concise catalogue records – drawn from an outline list of the collection – and fuller records where drawings have been catalogued in more detail (an ongoing process).
Contents of London: 21 St James's Square: unexecuted design by Soane, June 1794; as built design by R.F.Brettingham, July 1795, earlier design by Brettingham and Soane's designs for fittings1795, 1797 for the 5th Duke of Leeds, 1794-7
- Soane's designs for a new house, June 1794  - 
- As built drawings of the house designed by Brettingham, July 1794  - 
- Earlier plans and elevation from Brettingham's office
- Soane's designs for doors and a music table,1795 and 1797 (4)