Thank you Elduwin,
As there are approxiametely 15 houses in total on the island, for consistency we will employ a homogenous style, with variation in shape and size. Inland builds such as the woodswitch and hovels that accompany the keep will be wooden, however as all hamlets are situated along the coast, all houses will be made of stone [potential for wooden outbuildings such as food storage or workshop].
Hopefully that addresses your question.