- Bakeries, Guerneville
- Bank Supplies & Equipment, Guerneville
- Banks, Guerneville
- Bars, Guerneville
- Bars & Grills, Guerneville
- Beauty Salons, Guerneville
- Bed & Breakfast, Guerneville
- Beer & Wine Stores, Guerneville
- Beer Taverns, Guerneville
- Beverage Stores, Guerneville
- Bicycle Shops, Guerneville - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
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- Book Stores, Guerneville
- Brew Pubs, Guerneville
- Builders & Contractors, Guerneville
- Builders & Contractors - More, Guerneville
- Building Construction Consultants, Guerneville - Construction Management & Consulting
- Building Materials & Supplies, Guerneville
- Building Site Preparation Contractors, Guerneville - Land Preparation & Land Clearing
- Business & Professional Associations, Guerneville
- Business Legal Services, Guerneville
- Business Services, Guerneville
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