Listed Buildings In an official report The Royal Gunpowder Mills Waltham Abbey were described as “the most important site for the history of explosives in Europe”. Many of the major world advances in gunpowder and explosive production using a range of technologies were made here, continuing into the later role of Research Centre, extending to rocket propellant. The listed buildings are unique surviving structures spanning the range of this activity which was carried on for the Crown in conditions of secrecy for over 200 years. This came to an end in 1991 when the Establishment’s role was transferred to other centres and from 2001 for the first time this remarkable site was opened to the outside world. Grade I buildings are of exceptional interest. Just 2.5% of listed buildings are Grade I. Grade II* buildings are particularly important buildings of more than special interest. 5.8% of listed buildings are Grade II*. Grade II buildings are of special interest warranting every effort to preserve them. Over 90% of all listed buildings are Grade II. With 20 listed buildings, the Royal Gunpowder Mills has the largest collection of listed buildings at one location. We have published a book about the listed buildings. For more information and purchasing details, please visit our online book store. The 20 Listed Buildings at the Royal Gunpowder Mills L157 Group C Incorporating Mill (1861) Grade 1 Listed No: 1140098 NGR: TL3773701167 View Historic England Listing A201/A202 Mixing House & Saltpetre Mill (1787) Grade 2* Listed No: 1251016 NGR: TL3768800948 View Historic England Listing L148 Group G Incorporating Mill No.7 (1888) Grade 2* Listed No: 1262902 NGR: TL3768901284 View Historic England Listing L149 Group E Incorporating Mill No.3 (1869) Grade 2* Listed No: 1251161 NGR: TL3774301289 View Historic England Listing L153 Group D Incorporating Mill No.8 (1867) Grade 2* Listed No: 1251162 NGR: TL3771001232 View Historic England Listing L168 Engine House & Mechanics Shop (1857) Grade 2* Listed No: 1251159 NGR: TL3771801050 View Historic England Listing L176/L177 Boiler House & Dynamo House (1857 & 1902) Grade 2* Listed No: 1329390 NGR: TL3773401026 View Historic England Listing L133 Magazine (1879) Grade 2 Listed No: 1140103 NGR: TL3764901442 View Historic England Listing L134 Cordite Press House (1915) Grade 2 Listed No: 1424791 NGR: TL3768601424 View Historic England Listing L135 Tray Magazine (1882) Grade 2 Listed No: 1329392 NGR: TL3766001440 View Historic England Listing L136 Remote Accumulator Tower (1879) Grade 2 Listed No: 1251099 NGR: TL3764001420 View Historic England Listing L141 Sorting House (1889) Grade 2 Listed No: 1329389 NGR: TL3765301376 View Historic England Listing L145 Group F Incorporating Mill No 6 (1878) Grade 2 Listed No: 1251164 NGR: TL3766701338 View Historic England Listing L154 Expense Magazine (1864) Grade 2 Listed No: 1140099 NGR: TL3770801200 View Historic England Listing L165 Mineral Jelly Store No.2 (1916) Grade 2 Listed No: 1140102 NGR: TL3771201084 View Historic England Listing L167 Reel Drying Stove (1889) Grade 2 Listed No: 1251073 NGR: TL3777001120 View Historic England Listing L170a Expense Magazine (1857) Grade 2 Listed No: 1140100 NGR: TL3778001090 View Historic England Listing A200 Walton House (1787) Grade 2 Listed No: 1140101 NGR: TL3770800958 View Historic England Listing H7 Reel Drying Stove (1904) Grade 2 Listed No: 1251036 NGR: TL3756101100 View Historic England Listing Manage Cookie Preferences