"Basement" means that portion of a building which is partly underground and which has one-half or more of its ceiling height above the average finished grade of the ground adjoining the building. All dwellings referred to herein shall have a full basement, except that the Board of Zoning Appeals may permit a partial basement of at least 400 square feet where the topsoil condition is rock for at least six feet in an excavation.
(Ord. 121-1962. Passed 12-17-62.)