Ohio Code § 723.50

§ 723.50.

The owner or possessor of any lot or land in any municipal corporation may dig, or

cause to be dug, any cellar, pit, or excavation, to the full depth of the foundation

wall of any building upon adjoining lots, or to the full depth of nine feet below

the established grade of the street or streets on which such lot abuts, without reference

to the depth of adjoining foundation walls, without incurring the liability prescribed

in section 723.49 of the Revised Code , and may, on thirty days' notice to adjoining owners, grade and improve the surface

of any lot to correspond with the established grade of the street, streets, or alleys

upon which such lot or land abuts, without incurring liability.