The Capacity Charge (sometimes called a connection fee) is the fee that the NapaSan charges when a new home or commercial tenant connects to the sewer system, or expands its impact on the system.
View the 2018 Capacity Charge and Cost of Service Study here.
View the Capacity Charge Methodology and Development Fee Review here.
Calculating Capacity Charges
On July 1, 2021 the capacity charge per EDU will increase from $9,959 to $10,228. This rate is in effect through June 30, 2022.
See Title 5 (PDF) of the NapaSan Code for the formula used to calculate capacity charges for commercial and industrial customers.
What are the capacity charges for a single family dwelling?
On July 1, 2021 the capacity charge for a single family dwelling will increase from $9,959 to $10,228. This rate will be in effect until June 30, 2022.
What is a dwelling unit?
NapaSan defines separate dwelling units to include a living space with a kitchen. Examples of dwelling units include, but are not limited to:
• Single family homes
What is an accessory dwelling unit (ADU)?
An ADU is a secondary dwelling with complete living facilities for one or more persons that can be attached, detached, or re-purpose existing space.
What are the capacity charges for an accessory dwelling unit?
Capacity charges for ADUs are waived if the unit is under 499 square feet, and based upon square footage for all other units. Section 5.02.030 of the NapaSan Code lists the capacity charge assessments for different types of residential units.
How do changes to existing residential structures affect capacity charges?
Renovations within single family dwellings or multiple family dwellings will not trigger additional capacity charges, except where additional dwelling units are added to the property.