West Crystallising House (Building 18) At Former Marsh Gunpowder Works, Workshop Area

WEST CRYSTALLISING HOUSE (BUILDING 18) AT FORMER MARSH GUNPOWDER WORKS, WORKSHOP AREA, HAM ROAD

Listed on the National Heritage List for England. Search over 400,000 listed places

Explore this list entry

Overview

Heritage Category:
Listed Building
Grade:
II
List Entry Number:
1389580
Date first listed:
14-Dec-2001
List Entry Name:
West Crystallising House (Building 18) At Former Marsh Gunpowder Works, Workshop Area
Statutory Address:
WEST CRYSTALLISING HOUSE (BUILDING 18) AT FORMER MARSH GUNPOWDER WORKS, WORKSHOP AREA, HAM ROAD

Have you got a photo to share?

Join the Missing Pieces Project. We want you to share your photos and memories.

Location

Location of this list entry and nearby places that are also listed. Use our map search to find more listed places. 

There is a problem

Use of this mapping is subject to terms and conditions .

This map is for quick reference purposes only and may not be to scale.

What is the National Heritage List for England?

The National Heritage List for England is a unique register of our country's most significant historic buildings and sites. The places on the list are protected by law and most are not open to the public.

The list includes:

Icon Buildings
Icon Scheduled monuments
Icon Parks and gardens
Icon Battlefields
Icon Shipwrecks

Find out more about listing

Local Heritage Hub

Unlock and explore hidden histories, aerial photography, and listed buildings and places for every county, district, city and major town across England.

Discover more

Official list entry

Heritage Category:
Listed Building
Grade:
II
List Entry Number:
1389580
Date first listed:
14-Dec-2001
List Entry Name:
West Crystallising House (Building 18) At Former Marsh Gunpowder Works, Workshop Area
Statutory Address 1:
WEST CRYSTALLISING HOUSE (BUILDING 18) AT FORMER MARSH GUNPOWDER WORKS, WORKSHOP AREA, HAM ROAD

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.

Understanding list entries

Corrections and minor amendments

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.

Understanding list entries

Corrections and minor amendments

Location

Statutory Address:
WEST CRYSTALLISING HOUSE (BUILDING 18) AT FORMER MARSH GUNPOWDER WORKS, WORKSHOP AREA, HAM ROAD

The building or site itself may lie within the boundary of more than one authority.

County:
Kent
District:
Swale (District Authority)
Parish:
Faversham
National Grid Reference:
TR 01302 62758

Details

FAVERSHAM

TR 06 SW HAM ROAD
659/6/10017 West Crystallising House (Building 18)
14-DEC-01 at former Marsh Gunpowder Works, Work
shop Area

GV II

Crystallising house at saltpetre refinery, part of gunpowder works, now store.1800-10. Timber framed, clad with weatherboard, the SE and SW walls filled with brick nogging, with slate hipped roof.

PLAN: Rectangular single-cell plan.

EXTERIOR: Single storey, with double doors in SW end and NW side, 3 tall 5/5-pane casements each side and 1 in the end.

INTERIOR: 3 king post trusses, the outer ones with ties to end walls, and stone flagged floor.

HISTORY: The Marsh works were part of the Royal Gunpowder Factory which was established outside Faversham in 1786 after an explosion in the town, to remove some of the more dangerous processes. They played an important part in the improvement of the British gunpowder leading up to and during the Napoleonic Wars, under William Congreve. The saltpetre refinery was built in 1789 as part of Congreve's successful drive to improve the ingredients of British powder. It was privatised after the war, and closed in the 1920s.

The crystallising house was where saltpetre was crystallised out of the solution which had been treated in the nearby refining house (qv), by placing it in racks of vats to cool, hence the open structure. This is one of two original refinery buildings on this site, and is a particularly impressive through the close relationship between the structure and the process, and is little altered. It forms part of a discrete, coherent group of late C18-early C19 industrial buildings for refining saltpetre, the best preserved of this type in the country comparable with French and Swedish examples.

(Wayne Cocroft, Dangerous Energy. The archaeology of gunpowder and military explosives manufacture. Swindon (English Heritage), 2000, pp. 54-67)

Legacy

The contents of this record have been generated from a legacy data system.

Legacy System number:
488268
Legacy System:
LBS

Sources

Books and journals
Cocroft, W, Dangerous Energy The Archaeology of Gunpowder and Military Explosives Manufacture, (2000), 54-67

Legal

This building is listed under the Planning (Listed Buildings and Conservation Areas) Act 1990 as amended for its special architectural or historic interest.

Ordnance survey map of West Crystallising House (Building 18) At Former Marsh Gunpowder Works, Workshop Area

Map

This map is for quick reference purposes only and may not be to scale. This copy shows the entry on 19-Jun-2026 at 05:39:25.

Download a full scale map (PDF)
© Crown copyright [and database rights] 2026. OS AC0000815036. Use of this mapping is subject to Terms and Conditions.

End of official list entry

All text content is available under the Open Government Licence v3.0 , except where otherwise stated. Any supplied maps are © Crown Copyright [and database rights] 2026 OS AC0000815036 and may not be reproduced without permission.

Previous Overview
Next Comments and Photos