Castle Hill (originally known as Elvill's) is a large late-18th-century or early-19th-century Grade II listed mansion in Englefield Green, Surrey, England.

It was designed by Stiff Leadbetter for Sir John Elwill, 4th Baronet and built between 1758 and 1763.

The estate was bought by the banker George C. Raphael in the late 19th century.

It is presently owned by a foreign royal family.

[3] In addition to the main house, the entrance gates, bothy, stable block, and dairy are all individually Grade II listed.