WORK needs to be done soon or the whole site could be lost the dire message of the owners of East Cowes hidden gem , Norris Castle. Tucked away at the top of the town, next to the Osborne Estate, with views overlooking The Solent, Norris Castle has been, and still is, a site of local mystery. After being shut away from the public for many years, the Grade 1 listed building, built in 1799 by architect James Wyatt, along with the rest of its farm buildings and estate, has been opened up by developers, GTS Property, who have been working over the past five years to reinstate and protect the historic asset, according to the team.