With decades of experience installing solar across Snohomish County, Western Solar understands the permitting processes, utility requirements, and regional differences that shape projects throughout the county. From dense urban communities along the I-5 corridor to rural foothill properties, our team has experience designing solar and battery systems for a wide range of homes, businesses, and energy needs.
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Going Solar in Snohomish County
Snohomish County continues to see rapid growth in housing, industry, and infrastructure, driving increased demand for reliable and affordable energy. As new homes, businesses, and commercial facilities are built across the county, solar and battery storage are becoming an increasingly practical way to manage long-term electricity costs and improve energy resilience.
Snohomish PUD (SnoPUD)
All of Snohomish County is served by Snohomish County PUD (SnoPUD), the largest of Washington’s public utility districts and the second-largest publicly owned utility in the Pacific Northwest. As a customer-owned public utility, SnoPUD operates on a not-for-profit basis and is governed by elected commissioners rather than shareholders.
SnoPUD has historically maintained some of the lowest electricity rates in the region, supported in part by hydroelectric power purchased through the Bonneville Power Administration. While rates remain comparatively affordable, electricity costs are still expected to rise over time, making solar an increasingly attractive option for long-term energy savings and predictability.
Solar Net Metering
SnoPUD offers a straightforward net metering program for residential solar systems under 100 kW, allowing homeowners to offset their electricity usage with the power their system produces. When your solar panels generate more electricity than your home is using, excess energy is sent back to the grid and credited to your account at the retail electricity rate for future use. Unused credits roll forward throughout the year and reset each March 31st, which is why systems are typically designed to closely match your annual energy usage rather than significantly exceed it. Customers still pay basic utility connection charges, but net metering can substantially reduce overall electricity costs over time.
Jurisdictions & Permitting
The permitting process for residential solar projects in Snohomish County depends on whether a property is inside or outside city limits. Western Solar handles all standard building and electrical permitting on your behalf.
Within City Limits
Most cities in Snohomish County require building permits for residential solar installations. Cities such as Everett, Lake Stevens, Arlington, and Bothell each manage permitting through their local building departments and require a final building inspection after the installation. All electrical permitting is handled through Washington State Labor & Industries (L&I).
Outside City Limits (Unincorporated Snohomish County)
For properties outside incorporated areas, no building permits are required for standard solar PV systems, provided they follow established design and engineering guidelines. Electrical permits are purchased and inspected through L&I. This is typically a fast and standardized process, which helps keep projects moving efficiently.
Incentives & Tax Exemption
Solar installations in Washington State benefit from a significant financial advantage: systems under 100 kW are fully exempt from state and local sales tax. Depending on the local rate, this results in savings of roughly 8.5–10% or more on total system cost.
This exemption is currently in place through 2029 and requires no action from the customer. It is applied automatically at the time of purchase, meaning qualifying equipment is simply not taxed.
Grid Reliability in Snohomish County
Grid reliability in Snohomish County varies significantly depending on geography, weather exposure, and distance from major utility infrastructure. In some areas, battery storage provides important backup power during outages, while in others solar is driven primarily by long-term energy savings.
High vulnerability
Northwest & Foothill Communities
Communities in the northwestern portion of the county — including Stanwood, Arlington, and surrounding rural areas — sit at the end of longer distribution lines exposed to windstorms moving inland from Puget Sound and the Strait of Juan de Fuca. Further east, foothill communities such as Sultan, Gold Bar, and Index experience outages related to increasingly severe weather conditions and the challenges of maintaining transmission infrastructure in mountainous terrain.
In both regions, battery storage provides practical resilience by keeping critical appliances, refrigeration, internet service, and lighting operating during extended outages.
More Grid Stability
I-5 Corridor Communities
Communities along the I-5 corridor — including Marysville, Everett, Lynnwood, Edmonds, and Bothell — generally benefit from denser utility infrastructure and shorter outage durations.
In these areas, the value of solar is often primarily economic: locking in electricity production at today’s rates and reducing long-term exposure to rising utility costs. Battery storage remains an increasingly popular addition, but solar alone can provide strong financial returns for many homeowners.
Snohomish County Project Highlights
