Castle Horneck is a Grade II* listed building, and refurbished Georgian mansion to the west of the Cornish town of Penzance.

The first mention of Penzance is in 1284 and the Manor of Alverton was influential in the history and development of the town.

[4] In the early 16th-century Thomas Lavelis of Castle Horneck, inherited Trewoofe (near Lamorna) when he married Joanna, the youngest daughter of John de Trewoofe.

At that time there was extensive grounds with good specimens of giant redwood (Sequoiadendron giganteum) and the largest hollies (Ilex aquifolium) in the neighbourhood.

[9] In April 1880 the house was leased to the Reverend Franklyn Tonkin, the vicar of Madron.