| Knepp Wildland | 982.97 ha | | — |
| Pulborough Brooks Nature Reserve | 202.26 ha | | — |
| Warnham Park | 87.15 ha | | — |
| Buchan Country Park West Sussex County Council | 70.45 ha | | — |
| Waltham Brooks Nature Reserve | 42.79 ha | | — |
| Leonardslee Gardens | 42.52 ha | | — |
| Warnham Local Nature Reserve | 40.21 ha | | — |
| Horsham Park Horsham District Council | 20.11 ha | | — |
| Bramber Brooks | 18.97 ha | | — |
| Southwater Country Park | 18.63 ha | | — |
| Clays Field | 9.66 ha | 🐕 | — |
| Millford Grange Country Park | 5.17 ha | | — |
| King George V Playing Fields | 4.04 ha | | — |
| Henfield Common | 3.84 ha | | — |
| Holbrook Park | 3.83 ha | | — |
| Wild Garden | 3.54 ha | | — |
| Sussex Prairie Garden | 3.35 ha | | — |
| Saltings Field | 2.73 ha | | — |
| The Rec | 1.73 ha | | — |
| The Green | 1.51 ha | | — |
| Hamper's Green | 1.47 ha | | — |
| Tanyard field | 1.13 ha | | — |
| Public Playing Field | 1.09 ha | 🐕 | — |
| Barrack Field | 0.94 ha | | — |
| Charrington Way Recreation Ground | 0.93 ha | | — |
| Julia and Emma's Arboretum | 0.69 ha | | — |
| Walled Garden | 0.68 ha | | — |
| Walled Garden | 0.57 ha | | — |
| Human Nature Garden | 0.51 ha | | — |
| Sullington Parish Hall Park | 0.5 ha | | — |
| Dial Post Village Green | 0.47 ha | | — |
| Walled Garden | 0.4 ha | | — |
| The Phil Haskell Wild Garden | 0.39 ha | | — |
| Camelia Kitchen Garden | 0.31 ha | | — |
| Garden of Remembrance | 0.31 ha | | — |
| Walled Garden | 0.23 ha | | — |
| Walled Garden | 0.23 ha | | — |
| Walled Garden | 0.22 ha | | — |
| Bishop Park | 0.15 ha | | — |
| New Street Gardens | 0.1 ha | | — |
| Walled Garden | 0.1 ha | | — |
| Sensory Garden | 0.09 ha | | — |
| Grotto | — | | — |
| Leonardslee Gardens | — | | — |
| Walled Garden | — | | — |