| KnownEstates. | Date | Acreage | Value | Rents | Fees | Reference |
| Lambourn | 1300 | 177 | 131s | 51s | 2 | I.P.M. C.133. 93.10 |
| Canewdon.(Lambourn Hall) | 1300 | 121 | 48s | 1/2 | I.P.M. C.133. 93.10 | |
| Copford | 1300 | 205 | 211s | 115s | 1/2 | I.P.M. C.133. 93.10 |
| Suffolk:- | ||||||
| Polstead. | 1300 | 164 | 192s | 53s | 1/2 | I.P.M. C.133. 93.10 |
| Total in Essex = | 503 | 390s | 219s | 3 | ||
| Overall Total = | 667 | 528s | 272s | 3 | ||
| Possible Estates. | ||||||
| Copford | 1244 | 21 | FF.ii. 157. 844 | |||
| Copford &Molesham(sic) | 1279 | 30 | FF.ii. 28. 152 | |||
| Chigwell | 1274 | 1/2 | C.C.R. 1274. 82. | |||
| Suffolk:- | ||||||
| Polstead. | 1362 | 4 | C.I.P.M. XI, 355. | |||
| Possible Total = | 718 | 7 1/2 |
| Acquisitions:- | ||
| 1279 | 1 mess., 30 acres land in Copford and Molesham, for cons. 50 marks. | FF.ii.36.126 |
| Exchanges:- | ||
| 1247-8 | Some 20 acres in Copford by Petronilla FitzRichard, but confirmed to William who granted Petronilla in exchange 2 acres adjacent to her own lands in the same town. | FF.i.157.844 |