William Evans was an architect and surveyor active in the late-18th and early- to mid-19th centuries. He worked especially in Dorset, England, where, from 1824 until his death on 20 January 1842, he held the post of County Surveyor.
Bibliography
Colvin, Howard, A Biographical Dictionary of British Architects 1600-1840, 3rd edition (New Haven and London: Yale University Press, 1995), pp. 356-357.