Spokane sits in a semi-arid climate, but its seasonal weather patterns create strong demand for waterproofing services. The region receives an average of 17 inches of precipitation per year, with heavy snowfall in winter followed by spring thaws. Many homes built before 1980 in neighborhoods such as South Hill, Browne’s Addition, and the North Side have unfinished basements and crawl spaces that are prone to moisture intrusion. Older foundations, often made of concrete block or poured concrete with limited drainage, develop cracks over time. Additionally, Spokane’s clay-heavy soils expand and contract with moisture changes, putting pressure on foundation walls. The local real estate market is active, and home inspectors frequently flag water issues during sales transactions, creating a steady stream of motivated customers. The waterproofing industry in Spokane is competitive but fragmented — there are a few large national franchises alongside many smaller independents. A well-branded local business with strong online visibility can capture a healthy share of the market, especially in areas like the South Hill (newer homes with walkout basements) and the lower-lying areas near the Spokane River where water tables are higher.
To perform waterproofing as a contractor in Spokane, you must register with the Washington State Department of Labor & Industries (L&I). The license is called a “General Contractor” or “Specialty Contractor” license. Waterproofing typically falls under the “Construction Contractor – Specialty” classification. You will need to pass a business management exam, provide proof of workers’ compensation coverage (or an exemption), and pay the registration fee. As of 2025, the initial registration fee is around $120, with annual renewals. You must also obtain a surety bond — $6,000 for general contractors, $12,000 for specialty contractors — and general liability insurance of at least $200,000 (though many clients require $1 million). Visit the L&I website to create an account and apply.
In addition to the state contractor license, you need a City of Spokane business license. This is a simple registration process through the Spokane City Clerk’s office. The fee varies based on gross revenue but typically starts at $50 per year for small businesses. You can file online using the Spokane Business License Portal. Note that if you plan to work in surrounding areas like Spokane Valley, Liberty Lake, or Cheney, you may need separate municipal licenses, though many small cities accept the Spokane County business license reciprocity.
Waterproofing involves risks such as property damage from excavation or water intrusion. Most homeowners and commercial clients in Spokane require proof of general liability insurance (at least $1 million) and sometimes completed operations coverage. Also, Washington law mandates that contractors have a bond on file with L&I. This bond protects consumers if you fail to complete a job or violate regulations.
You must register with the Washington State Department of Revenue for a Combined Business License Application (also called UBI number). This allows you to collect and remit sales tax. The state sales tax in Spokane is 8.7% (state 6.5% + local 2.2%). Note that waterproofing services are generally taxable as a construction service. Materials you supply (sealants, membranes, etc.) are also taxable. Keep detailed records.
Go to Google Business Profile (formerly Google My Business) and create an account using your business name, address, and phone number. Use a local Spokane address — do not use a PO Box. If you work from home, you can hide your home address in the settings but still set service areas. Verify your listing by postcard, phone, or email. For contractors, Google often requires video verification or a postcard mailed to your physical location.
Your primary category should be “Waterproofing Contractor.” You can add secondary categories such as “Basement Waterproofing Contractor,” “Foundation Contractor,” “General Contractor,” or “Home Improvement Service.” This helps Google understand your specialty.
Ask every satisfied customer for a review. Focus on Google, but also Yelp and Facebook. Respond to all reviews — thank positive ones and address negative ones professionally. In Spokane, word-of-mouth and online reviews are heavily trusted. Aim to get at least 20 reviews in your first six months.
Spokane-specific keywords include “waterproofing Spokane,” “basement waterproofing Spokane WA,” “crawl space encapsulation Spokane,” “foundation repair Spokane,” “sump pump installation Spokane,” and “waterproofing contractor Spokane Valley.” Use tools like Google Keyword Planner or Ubersuggest to find related long-tail phrases such as “cheap basement waterproofing Spokane” or “exterior drainage solutions Spokane.”
Create a service page for each main offering (basement waterproofing, crawl space, etc.) and optimize each page with the targeted keyword in the title tag, H1 heading, meta description, and body copy. Include local landmarks: “Serving the South Hill, North Side, and Spokane Valley.” Use schema markup — specifically LocalBusiness schema with your address, phone, and opening hours. Add a FAQ section answering common Spokane water issues (e.g., “How to prevent foundation cracks during Spokane winters”).
List your business on high-authority local directories: Spokane Chamber of Commerce, Better Business Bureau (Northwest), Spokane County Business Directory, Yelp, Angi, HomeAdvisor, Thumbtack, and Nextdoor. Ensure Name, Address, Phone (NAP) is consistent across all platforms. Also target Spokane-specific sites like “Spokane List” or “City of Spokane Business Directory.”
Reach out to local real estate agents, home inspectors, and contractors for backlinks. Write guest posts for Spokane home improvement blogs. Sponsor local events (like the Spokane Home & Garden Show) and get a link from the event website. Build relationships with Spokane builders and remodelers — they often get referrals from them.
Publish blog posts like “5 Signs Your Spokane Basement Needs Waterproofing” or “Why Spokane Clay Soil Causes Foundation Problems.” Include photos of local homes. These pages rank for informational queries and bring in organic traffic.
Waterproofing pricing in Spokane varies based on job complexity, access, and materials. Here are typical market rates (2025 data):
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