The legislative body of a general law city may impose a sidewalk installation charge pursuant to this article. The charge shall not exceed three dollars ($3) annually on all businesses and residences located within the city, including trailer coaches valued under subdivision (e) of Section 10753.2 of the Revenue and Taxation Code. Each dwelling in a multiple-dwelling unit shall be considered a separate residence for purposes of such charge, but each business having a room or rooms subject to the tax imposed under Section 51030 shall be considered as a single business for purposes of such charge.