Soane's proposals for alterations and additions ( to [19)] made c. March 1805 to c.February 1808 became increasingly extensive until a new build was inevitable , drawings for which were made in 1811. Presumably the old house would have remained and the 'mansion' built on a fresh site within the estate. The drawings ( to  are all for a two storey, five by five bay house with a portico. Except for the porticos (for which there were several designs) the plans do not vary so that the placing of door and windows is constant but there is a choice of the 'trimmings' mainly an Ionic order and /or lesenes (pilaster without base or capital). The result is a convenient and gentlemanly house in the country very different from the existing Combe House. The Reverend Thomas Putt who succeeded to the estate in 1812, rejected Soane's proposed alterations and made his own. See (on line) Historic England, Combe House for a full account of this Grade 1 house (now a hotel).
B.Cherry and N.Pevsner, Devon, 1991, pp.282-3; D.Stroud, Sir John Soane architect, 1996, pp.85, 268; P.Dean, Sir John Soane and the country estate, 1999, p.191. See also: Historic England, Combe House (on line)
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.
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Contents of Combe House, Gittisham, Honiton, Devonshire: designs for alterations and additions, 1805-1808 and designs for a new house,1811 for Reymundo Putt, 1805-1811 (40 )
- Surveys and designs for alterations and additions, 1805 (7)
- Copies of plans, made November 1807 (4)
- Record drawings, 1807-08 (8)
- Designs for a new house, November-December, 1811 (21)