Sec. 17. Foundation.
Every building hereafter erected, except buildings erected upon
solid rock, shall have a concrete, brick, stone or masonry foundation
wall, laid in Portland cement mortar extending around the
entire area to be occupied by the building and below the curb grade
at least eighteen inches, or the finished grade of a lot if the building
does not immediately join the sidewalk. Except that frame
dwellings costing two thousand dollars or less may be constructed
upon wood, concrete or masonry posts.
The foregoing paragraph shall not apply to sheds, private
garages with space for not more than four vehicles, barns, poultry
houses and other similar structures, costing one thousand dollars
or less. (Id., § 494(9).)
