14.10.020 Policy on rates and charges.
A. For each single-family dwelling, each accessory dwelling unit, each residential unit of a duplex, and each mobile/manufactured home on developed real property, the utility shall charge the number of equivalent billings units based on the following classification:
1. Small residence (4,400 square feet or less of hard surface area) shall be one EBU.
2. Medium residence (more than 4,400 square feet of hard surface area and less than 7,000 square feet of hard surface area) shall be 1.3 EBUs.
3. Large residence (7,000 square feet or more of hard surface area) shall be 1.6 EBUs.
B. Commercial buildings shall be granted a 10 percent rate reduction if all buildings on the property are shown to utilize a rainwater harvesting system in accordance with RCW 35.92.020(3).
C. For all other developed real properties, the utility shall charge the number of equivalent billing units calculated on each parcel based on the amount of hard surface on each parcel divided by the definition of an equivalent billing unit identified in GHMC 14.10.010. Regardless of calculation of hard surface, a minimum of one equivalent billing unit shall be charged. Calculations that result in more than one equivalent billing unit shall be rounded to the nearest 0.1 EBU. (Ord. 1482 § 1, 2022).