Hardwick House, 17, North End, Sedgefield (Sedgefield) - Source of Reference
| No. | Originator(s) | Date | Title | Notes |
|---|---|---|---|---|
| 1 | Ordnance Survey | 1856 to 1865 | First Edition Ordnance Survey Map | |
| 2 | Durham County Council | May-2016 | Conservation Area Appraisal: Sedgefield | page 102 |