
Tower 13 stands on Hythe seafront in Western Parade and somehow survived the building of the promenade.
The War Department sold it in 1906, and in 1928 it became a residence, bought by A.J. Glock, a builder from Streatham. Alterations were carried out and the tower named 'Place Forte'. 1
It was sold again in 1937, to an Edgar Wheeler, and in 1940 was used as an observation post to direct the cross-Channel shelling operations.2

It was sold yet again in 1960 to an architect, Ronald Ward, and used as a residence once more.
Further conversions were carried out, notably the addition of large windows and the removal of internal brickwork to form cupboards. The walls were also made thinner to increase floorspace, and a viewing platform and extra room added to the roof.3
Such alterations were permissable at that time, but are unlikely to be allowed to be carried out on a scheduled ancient monument today. The large number of windows looks incongruous for a Martello Tower, but doubtless admits far more natural light than the orignal narrow embrasures.
The tower was renamed 'The Martello Tower', and mounted an original 24-pounder cannon outside, although this now appears to have been moved elsewhere.