Tower 4, along with its neighbours up to No.9, were all built into deep dry moats, and were situated within the Shorncliffe Camp area, up on the heights overlooking the coastline. The moat wall was built of stone, the moat itself having been half filled-in by 1948.1
L. Fussell described the area around the tower:
"The verge of the cliff affords a delightful walk, overlooking the sea on the left, and embracing a fine prospect of the ancient works called Castle-Hill in the opposite direction and of the modern barracks on Shorn-Cliff in front; until at a distance of a mile and a halfwestward of Folkestone, arriving at the brow of the hill, where a Martello tower has been erected for the defence of Sandgate, there opens in full view the whole line of coast, forming a gentle curve,which terminates with the light-house at Dungeness: the shore being defended by a range of towers like giant centinels along the very margin of the water."2
The tower was fitted with a large slate water tank, and became one of the towers, along with Nos. 27, 31 and 55 to have semaphore signalling apparatus to send messages installed beside it by 1820.3
It was occupied by the Royal Observer Corps during World War Two,4 but does not appear to have been used since.
The tower currently stands derelict covered in a thick layer of ivy in the garden of a private house. The brickwork appears to be in poor condition, although standing in its moat, covered in vegetation, very little of the tower can be seen.
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| Tower 3 | Sandgate Castle |