(a) Any construction within the O&I-1, O&I-2, O&I-3, C-1, C-2, C-3, C-4, M-S, I-1, I-2, X-1, X-2, X-3, U-1, and D-2, and all planned unit development districts for the above-listed use groups; parking lots in the D-1 zoning district. Multifamily dwelling developments (buildings composed of four or more dwelling units), churches or other religious or institutional uses in any zoning district and all developments constructed under the provisions of a conditional use permit, in any zoning district, are also subject to this chapter.

(b) An alteration to an existing structure which increases or decreases the amount of gross floor area of such structure by more than 50 percent or an alteration to a parking lot which increases or decreases the gross area of the parking lot by more than 50 percent shall be required to comply with all landscaping provisions contained in this chapter.

(c) The addition to a building or parking lot where the addition is adjacent to a residential use or a residential zone and a parking lot buffer is required in accordance with buffer requirements in TMC 18.235.060.

(d) The provisions of this chapter shall apply to all legal nonconforming uses as established and defined in TMC 18.50.040. (Ord. 20062 § 37, 4-18-17.)