Washington
How to Start a Solar Installation Business in Washington
What it costs to register and insure a solar installation business in Washington, what to check on licensing, and the full step-by-step checklist to get your first customer.
Washington LLC Filing Quick Facts
Filing Agency
Washington Secretary of State
Washington has no state personal income tax, but applies a Business & Occupation (B&O) tax on gross receipts that applies broadly to service and contracting businesses -- confirm current treatment with the Washington Department of Revenue.
Filing fees change periodically — confirm the current fee directly with the Washington Secretary of State before filing. This is general informational content, not legal, tax, or licensing advice.
Contractor & electrical licensing is state-specific — don't guess
Unlike the LLC fee above, contractor and electrical licensing requirements for solar installation vary meaningfully by state and change over time. Before you commit to a business model, contact Washington's contractor licensing board directly to confirm what license type, exam, and bonding your state requires. See our full licensing overview for what to ask and who to contact.
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Startup Checklist for Washington
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1. Choose a business structure
Most solar installation businesses should form an LLC rather than operate as a sole proprietor, given the liability in roof and electrical work.
LLC vs. sole proprietorship →
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2. Confirm your licensing requirements
Contractor and electrical licensing for solar varies by state -- check directly with your state licensing board before you spend on anything else.
Full licensing overview →
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3. Get insured and bonded
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4. Buy your equipment
Fall protection, racking tools, and electrical test equipment -- or start lean by subcontracting installs.
Equipment checklist →
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5. Price your jobs
Bid on a true cost-per-watt basis that covers overhead and warranty reserve, not just equipment and labor.
Pricing guide →
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6. Get your first customers
The Washington Solar Market
A typical Washington homeowner with a $150/mo electric bill is quoted roughly $29,484–$36,036 installed, based on the state's 10.4¢/kWh electricity rate and 3.5 peak sun hours/day — a useful benchmark when you're setting your own bids. See the full Washington pricing breakdown, or our complete pricing guide for how to build your own bids from there.
FAQs
How much does it cost to form an LLC in Washington?
See the exact filing fee and agency above. The LLC fee is the same regardless of industry -- what varies for a solar business specifically is contractor/electrical licensing cost and insurance, which depend on your state's requirements and your business model.
Do I need a special contractor license to install solar in Washington?
This genuinely varies by state and isn't something to guess on. Some states require a dedicated solar contractor license, others fold solar into a general electrical contractor license, and requirements change over time. Contact your state contractor licensing board directly to confirm what applies in Washington before committing to a business model.
What's the fastest way to get my first customers in Washington?
Your personal network almost always provides your first job. From there, a free Google Business Profile, asking every customer for a review, and getting a real website with an instant estimate calculator online are the highest-leverage next steps.
Should I install myself or subcontract in Washington?
Many new solar businesses start by handling sales, design, and permitting while subcontracting the physical installation to a licensed crew -- lower capital requirement, faster to revenue -- and bring installation in-house once they have volume. See our full startup guide for the tradeoffs.
Not ready to build your own marketing yet?
Solar Cost Predictor's Partner Program gives one installer per city exclusive, guaranteed lead visibility — no website required to start.
See If Your City Is Available →
The Full Starting-a-Solar-Business Guide
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