| Costislost | |
| Coordinates: | 50.4984°N -4.7819°W |
| Location: | Egloshayle, Cornwall, England |
| Designation1: | Grade II |
| Designation1 Offname: | Costilost [sic] Farmhouse |
| Designation1 Date: | 4 November 1988 |
Costislost is a Grade II listed house in the parish of Egloshayle in Cornwall, England.[1] To the south are Costislost Plantations.It dates to probably the 17th century, and underwent remodelling in the 18th and 19th centuries. The property was a farmhouse for centuries[2] and belonged to the Lakeman family in the 19th century.[3]
Today it is run as an organic retreat and nutritional health centre.[4]