| Sphere industrial estate | 120 | 1.35 | not-permissioned |
| EMP9 (northern part) St Albans Road (adjacent to the Council depot) | 100 | 2.40 | not-permissioned |
| Civic Centre South | 100 | 0.88 | permissioned |
| Griffiths Way | 100 | 8.52 | permissioned |
| Morrisons car park | 76 | 1.65 | not-permissioned |
| Civic Centre | 70 | 0.43 | not-permissioned |
| West of St Peters Street | 60 | 2.13 | not-permissioned |
| Former Ariston Site (incl Pioneer Youth Club) | 55 | 2.63 | not-permissioned |
| The Red House Harpenden Memorial Hospital | 55 | 1.62 | not-permissioned |
| Hertfordshire Business Centre Alexander Road | 45 | 0.28 | not-permissioned |
| Abbey Station | 40 | 0.94 | not-permissioned |
| Pan Autos and adjacent uses Dark Lane and Grove Road | 39 | 0.35 | permissioned |
| Catherine Street | 30 | 0.81 | permissioned |
| Electricity Works Campfield Road | 25 | 0.66 | permissioned |
| 222 London Road | 22 | 0.66 | permissioned |
| Jewson Depot | 20 | 0.34 | permissioned |
| Southern part of Murphys Chemicals Site Codicote Road | 18 | 0.81 | permissioned |
| Jewsons Dark Lane | 18 | 0.34 | not-permissioned |
| Harpenden Public Hall | 18 | 0.47 | not-permissioned |
| Oaktree Manor Nursing Home 2 Chene Drive Waverley Road | 14 | 0.39 | not-permissioned |
| Ziggurat car park | 12 | 0.44 | permissioned |
| Land at the Hedges Woollam Crescent | 10 | 0.27 | permissioned |
| Haseldine Road car park | 9 | 0.52 | not-permissioned |
| Former Sopwell Youth Club Site Land to the rear of Leyland Avenue | 8 | 0.50 | permissioned |
| 72 High Street | 6 | 0.66 | not-permissioned |
| 270-274, London Road, St Albans, AL1 1HY | - | 0.68 | permissioned |
| Units 6 and 7, Batford Mill, Lower Luton Road, Harpenden, AL5 5BZ | - | 0.41 | permissioned |
| 382, Hatfield Road, St Albans, AL4 0DU | - | 0.06 | permissioned |
| 67, St Peters Street, St Albans, AL1 3EA | - | 0.06 | permissioned |
| York House, Guildford Road & 130 Ashley Road, St Albans, AL1 5JX | - | 0.16 | permissioned |
| The King Offa PH, Norman Close, Wallingford Walk, St Albans, AL1 2JJ | - | 0.37 | permissioned |
| 271, High Street, London Colney, AL2 1HA | - | 0.10 | permissioned |
| Verulam Industrial Estate, London Road, St Albans, AL1 1JB | - | 0.63 | permissioned |
| 91 - 93 Victoria Street, St Albans, AL1 3TJ | - | 0.08 | permissioned |
| 21, Salisbury Avenue, Harpenden, AL5 2QF | - | 0.23 | permissioned |
| 69 - 69a St Peters Street, St Albans, AL1 3ED | - | 0.07 | permissioned |
| Mitchell Hall 85, Verulam Road, St Albans, AL3 4DJ | - | 0.07 | permissioned |
| 61-65, St Peters Street, St Albans, AL1 3EA | - | 0.11 | permissioned |
| 115, London Road, St Albans, AL1 1LR | - | 0.01 | permissioned |
| Clarence House 134, Hatfield Road, St Albans, AL1 4NW | - | 0.20 | permissioned |
| Signature House 23, Vaughan Road, Harpenden, AL5 4EL | - | 0.03 | permissioned |
| Aecom House 63-77, Victoria Street, St Albans, AL1 3ER | - | 0.32 | permissioned |