4, 5 and 6 Allergate, Durham City (Durham City) - Source of Reference
| No. | Originator(s) | Date | Title | Notes |
|---|---|---|---|---|
| 1 | Department of Environment, English Heritage, Historic Buildings and Monuments Commission | 1950 | List of buildings of special architectural or historic interest, also known as "Greenbacks" | LB Volume, Map & Item: 1914, 13, 20 |
| 2 | Department of Archaeology Durham University | 1991 | Urban Archaeological Database | |
| 3 | Department of Archaeology Durham University | 1988 to 1991 | Durham City Archaeological Conservation Management Project Archive | |
| 4 | Bonney, M M | 1985 | The development of a northern town in the later Middle Ages: the City of Durham | |
| 5 | 5 Allergate, Durham | |||
| 6 | 4 Allergate, Durham | |||
| 7 | Ryder, P | 1991 | Buildings Survey, 1990-1991 | |
| 8 | Ryder, P | 11-Dec-1990 to 25-Feb-1991 | Durham Buildings Survey - Fieldbook 2 | p 120 |
| 9 | Durham County Council | Jul-2016 | Conservation Area Appraisal: Character Area 3, Crossgate (Durham City) | page 94 |