Trewarmett (Cornish: Trewerman)[1] is a small hamlet in Cornwall, England, United Kingdom.

It lies within the civil parish of Tintagel, 3 miles (5 km) north-west of Camelford.

Trewarmett lies within the Cornwall Area of Outstanding Natural Beauty (AONB).

The Prince of Wales Engine House was built in 1871 to transport slate and water from the quarries towards Tintagel.

In 2014, the Prince of Wales declined an offer to sell the property to private buyers.