The Citadel comprises 217,371 sq ft (20,194 sq m) of accommodation over 54 buildings within a 32.75 acre site. The site is made up of the following four distinct parts:

1. The Parade Ground - 15.27 acres (6.18 Ha).

Comprising the site enclosed by the revetment and accessed via the gatehouse. It is home to a number of historical buildings including the Officers Quarter's building (building 1), the casemates, plus various buildings more recently constructed by the Government including Rye House, a four-storey prison building. The Dover Western Heights Masterplan SPD 2015 indicates provision for a second access directly to the Parade Ground over the revetment.

2. The Western Outworks - 7.36 acres (2.98 Ha)

Accessed via the Parade Ground, it is situated to the west and houses 6 barrack huts plus ancillary accommodation and open land.

3. The Car Park and Additional Land - 3.81 acres (1.70 Ha)

Situated to the east of the Parade Ground outside of the revetment providing car parking and the visitors' reception centre.

4. The Revetment and Additional Land - 6.31 acres (2.55 Ha)

Approximately 6 metres deep, just under 1 mile long and with a site area of 6.31 acres, the revetment encircles the Parade Ground.