Slough Fort
SLOUGH FORT
Listed on the National Heritage List for England. Search over 400,000 listed places
Overview
- Heritage Category:
- Listed Building
- Grade:
- II*
- List Entry Number:
- 1393526
- Date first listed:
- 12-Nov-2009
- List Entry Name:
- Slough Fort
- Statutory Address:
- SLOUGH FORT
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Location
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Discover moreOfficial list entry
- Heritage Category:
- Listed Building
- Grade:
- II*
- List Entry Number:
- 1393526
- Date first listed:
- 12-Nov-2009
- List Entry Name:
- Slough Fort
- Statutory Address 1:
- SLOUGH FORT
The scope of legal protection for listed buildings
This List entry helps identify the building designated at this address for its special architectural or historic interest.
Unless the List entry states otherwise, it includes both the structure itself and any object or structure fixed to it (whether inside or outside) as well as any object or structure within the curtilage of the building.
For these purposes, to be included within the curtilage of the building, the object or structure must have formed part of the land since before 1st July 1948.
The scope of legal protection for listed buildings
This List entry helps identify the building designated at this address for its special architectural or historic interest.
Unless the List entry states otherwise, it includes both the structure itself and any object or structure fixed to it (whether inside or outside) as well as any object or structure within the curtilage of the building.
For these purposes, to be included within the curtilage of the building, the object or structure must have formed part of the land since before 1st July 1948.
Location
- Statutory Address:
- SLOUGH FORT
The building or site itself may lie within the boundary of more than one authority.
- District:
- Medway (Unitary Authority)
- Parish:
- Allhallows
- National Grid Reference:
- TQ 83771 78519
Reasons for Designation
Slough Fort is designated at Grade II* for the following principal reasons: * Embodies both technological developments in armaments and coastal defence during the late-C19 to early-C20 as well as the changing views of the perceived defensive need on the north Kent coast at this time. * It is a well preserved and relatively intact structure which is unusual in both its original design and subsequent development, and is of more than special interest.
Details
ALLHALLOWS
1797/0/10012 Slough Fort 12-NOV-09
GV II* Royal Commission fort of 1867, major redevelopment and extension 1889-91. Further modifications during first two decades of C20. MATERIALS: Kentish ragstone and brick with granite dressings. Brick and/or concrete for armament, range finding and control post positions.
PLAN: D-shaped plan with curved façade facing north to the coast surrounding an open stone-flagged parade. Ground floor and flat roof above. Ground floor: north range of seven casemates. South range: chambers flanking central fort entrance passage. Two stair turrets at south-east and south-west corners providing roof access. Roof level: north range with remnants of infantry fire step and access stairs of 1867; also (from west to east) post-1892 modified quick-firing gun emplacement with ammunition lockers and possible gun shelter to south; range finder position associated with wing batteries of 1889-91; further modified quick-firing gun emplacement (also post-1892). World War I Battery Command Post. South range: four parallel north-south walls of unknown function.
EXTERIOR: Principal elevation to south: rusticated Kentish ragstone with fine granite dressings to entrance gate. Sandstone lintels to windows and copings to parapet. Central projecting bay with pairs of windows flanking the central gate. Recessed bays to west and east with paired windows, further recessed bays to extreme west and east with single window and access doors to former ammunition stores. Infantry loopholes throughout. North elevation masked by earthwork of 1889-91. Internal (north) elevation of south range: stock brick in mainly English bond; gauged flat brick arches over windows (some now altered). South elevation of north range: combination of brick and iron arches with pillars to casemates reflecting late-C19 modifications. Original metal plated fort gates flanked by pulleys for raising former drawbridge.
INTERIOR: Ground floor, north range: seven casemates without embrasures (blocked 1889-91). Spiral stone staircases.
HISTORY: Built as a consequence of the 1859 Royal Commission on the Defences of the United Kingdom in response to a perceived French threat. Positioned to link the Medway defences with other new forts in the Thames Estuary. Modified and extended in 1889-91 with the addition of two wing batteries each accommodating two 'disappearing' guns. Further modifications to the armaments in the early-C20 and the erection of a Battery Command Post on the fort roof during World War I to operate in conjunction with a Port War Signal Station to the east of Slough Fort. Army withdrew 1920 and fort sold 1929 when used to house a small zoo. Early 1960s change of use to stables. Modern stable buildings and modifications are not of special interest. Note: The listing relates to the main D-shaped fort only. The external earthwork defences, wing batteries, the well protecting wall and the probable gun detachment shelter are protected by scheduled monument status (reference SM 36202).
SOURCES: Gulvin, K R, Medway Forts, (2000) pp16-17 Saunders, A & Smith, V, Kent's Defence Heritage. (2001 - Kent County Council & English Heritage) Palmerston Forts Society website: http://www.palmerstonforts.org.uk
MAPS AND PLANS: WO78/4532, 24th August 1892 (National Archives) 160/97, 16th June 1897 (National Archives) WO/78/4431, 1919 (National Archives) 2nd edition Ordnance Survey map (25": 1 mile) 1898, v/15 Ordnance Survey map (25": 1 mile) 1908, v/15
ADDITIONAL SOURCES: National Monuments Record no. TQ87NW14 (unique identifier 418721) Kent Sites and Monuments Record no. TQ87NW14 ; KE3201 Armament returns and contemporary fort reports (National Archives)
REASONS FOR DESIGNATION: Slough Fort is listed at Grade II* for the following principal reasons: * Embodies both technological developments in armaments and coastal defence during the late-C19 to early-C20 as well as the changing views of the perceived defensive need on the north Kent coast at this time. * It is a well preserved and relatively intact structure which is unusual in both its original design and subsequent development, and is of more than special interest.
Legacy
The contents of this record have been generated from a legacy data system.
- Legacy System number:
- 491054
- Legacy System:
- LBS
Sources
Books and journals
Gulvin, K R, Medway Forts, (2000), 16-17
Saunders, A, Smith, V, Kent's Defence Heritage, (2001)
Legal
This building is listed under the Planning (Listed Buildings and Conservation Areas) Act 1990 as amended for its special architectural or historic interest.
Map
This map is for quick reference purposes only and may not be to scale. This copy shows the entry on 04-Jun-2026 at 09:46:13.
Download a full scale map (PDF)© Crown copyright [and database rights] 2026. OS AC0000815036. All rights reserved. Ordnance Survey Licence number 100024900.© British Crown and SeaZone Solutions Limited 2026. All rights reserved. Licence number 102006.006.
End of official list entry