| 1 Old Nursery School, Park Lane, Old Knebworth, Knebworth | - | 111 m² | - |
| 2 Old Nursery School, Park Lane, Old Knebworth, Knebworth | - | 103 m² | - |
| 3 Old Nursery School, Park Lane, Old Knebworth, Knebworth | - | 56 m² | - |
| 156, Park Lane, Old Knebworth, Knebworth | Freehold | 175 m² | £450,000 (2010) |
| 157 Park Lane, Knebworth | - | 74 m² | - |
| 161 Park Lane, Old Knebworth, Knebworth | - | 100 m² | - |
| 162 Park Lane, Old Knebworth, Old Knebworth | Freehold | 194 m² | £875,000 (2022) |
| 163 Park Lane, Old Knebworth, Knebworth | - | 72 m² | - |
| 164, Park Lane, Old Knebworth, Knebworth | Freehold | 188 m² | £935,000 (2025) |
| 167 Park Lane, Old Knebworth, Knebworth | - | 72 m² | - |
| 169 Park Lane, Old Knebworth, Knebworth | - | 73 m² | - |
| 170 Park Lane, Knebworth | - | 74 m² | - |
| 171 Park Lane, Old Knebworth, Knebworth | - | 74 m² | - |
| 172 Park Lane, Knebworth | - | 111 m² | - |
| 173, Park Lane, Old Knebworth, Knebworth | - | 88 m² | - |
| 175, Park Lane, Old Knebworth, Knebworth | - | 75 m² | - |
| 176 Park Lane, Old Knebworth, Knebworth | - | 91 m² | - |
| 177 Park Lane, Knebworth | - | 74 m² | - |
| 178 Park Lane, Old Knebworth, Knebworth | Freehold | 133 m² | £680,000 (2024) |
| 180 Park Lane, Knebworth | - | 90 m² | - |
| 181 Park Lane, Old Knebworth, Knebworth | - | 73 m² | - |
| 182, Park Lane, Old Knebworth, Knebworth | - | 117 m² | - |
| 183 Park Lane, Old Knebworth, Knebworth | - | 75 m² | - |
| 184 Park Lane, Old Knebworth, Knebworth | Freehold | 162 m² | £870,000 (2025) |
| 185 Park Lane, Knebworth | - | 72 m² | - |
| 187 Park Lane, Knebworth | - | 74 m² | - |
| 189 Park Lane, Old Knebworth, Knebworth | - | 75 m² | - |
| 195, Park Lane, Old Knebworth, Knebworth | Freehold | 119 m² | £520,000 (2014) |
| 197, Park Lane, Old Knebworth, Knebworth | Freehold | 187 m² | £670,000 (2020) |
| 199 Park Lane, Old Knebworth, Knebworth | Freehold | 75 m² | £548,000 (2023) |
| 201 Park Lane, Old Knebworth, Knebworth | Freehold | 111 m² | £630,000 (2023) |
| 205, Park Lane, Old Knebworth, Knebworth | Freehold | 84 m² | £373,000 (2015) |
| Little Hyde, Park Lane, Old Knebworth, Knebworth | Freehold | 100 m² | £467,500 (2025) |
| The White House, Park Lane, Old Knebworth, Knebworth | Freehold | 266 m² | £982,500 (2014) |