About Insurance by Castle

For over 30 years, Insurance by Castle has been providing comprehensive landlords, rental property, and apartment insurance in Redwood City, San Mateo, and surrounding areas throughout California. Our customers come to us for the price, but stay for the exceptional customer service we provide to each person that walks through our door. Since our founder, Jack Castle, started this agency, we have been a one stop shop for all of your insurance solutions. We have established partnerships with some of the nation’s top-rated companies – giving us the ability to work with different providers, finding the best rate and the best policy that truly fits your needs.

Companies Represented

  • American Modern Insurance Group
  • Anderson Murison
  • Berkshire Hathaway Inc
  • California Earthquake Authority
  • Capital Insurance Group
  • Cbic
  • Charity First Insurance Services
  • Chartis Insurance
  • Chubb Insurance
  • Ciba Insurance Services
  • Cna
  • Deans Homer
  • Federal National Insurance
  • First Mercury
  • Geovera Insurance
  • Golden Bear Insurance Company
  • Great American Insurance
  • Guard Insurance Group
  • Hagerty Insurance
  • Icw Group
  • Je Brown Associates Insurance Services Inc
  • Liberty Mutual
  • Lloyds Insurance
  • Mercury Insurance Group
  • Nonprofits Insurance Alliance Of California
  • Oregon Mutual
  • Personal Umbrella Com
  • Philadelphia Insurance Companies
  • Republic Indemnity
  • Safeco Insurance
  • Scottsdale Insurance Company
  • Travelers

Insurance by Castle Agents

Insurance Products Offered

  • Accounting Firms
  • Alarm Contractors
  • Arborists
  • Auto
  • Bonds
  • Business Owners Policy Bop
  • Commercial Auto Insurance
  • Commercial General Liability
  • Commercial Property Insurance
  • Commercial Umbrella Insurance
  • Construction
  • Contractors Specialty Trade
  • Craft Breweries
  • Crime Insurance
  • Educational Facilities
  • Financial Institutions
  • Healthcare Facilities
  • Healthcare Practices
  • Home
  • Inland Marine Insurance
  • Law Firms
  • Life
  • Life Science
  • Limousine Services
  • Livestock
  • Loss Control
  • Maintenance Contractors
  • Manufacturing
  • Marine
  • Maritime Employers
  • Media Advertising
  • Orthotics Prosthetics
  • Personal Umbrella
  • Pools Spas
  • Printers Publishers
  • Professional Liability
  • Railroad Contractors Manufacturers
  • Real Estate
  • Recreational
  • Residential Landlord
  • Retail
  • School Bus Contractors
  • Scrap Metal
  • Security Guards
  • Self Storage Facilities
  • Septic Contractors
  • Surety Bonds
  • Technology Services
  • Tow Trucks Auto Transporters
  • Water Well Drillers
  • Workers Compensation


  • Naran V. 9 months ago


  • Tambi H. 12 months ago

    Easy to work with, fantastic product, I’m grateful for Castle’s quality of service.

  • Mabel S. about 1 year ago

    good service and great prices.

  • John P. over 1 year ago

    Castle insurance has always found me the least expensive rental home insurance available. Friendly, good group of people!

  • Linda M. over 2 years ago

    Castle has been providing excellent coverage at a fantastic price for years. They are over the top helpful with all my multi-unit needs.

  • David M. over 3 years ago

    Long time great service passed down from the elder (Jack Castle) and still handled by the siblings in a fantastic well organised up to date operation!

  • Laurel N. over 3 years ago

    Very helpful. Made sure my small business got the insurance I needed and only what I needed. Great about answering questions and doing research on my behalf. Super easy to work with them. Would recommend to everyone.

  • Eric I. almost 4 years ago

    Terrace Associates Inc. In Redwood City relies on the top notch knowledge and service that Castle Insurance provides. We feel valued as a customer and know they will provide us with the professionalism and diligence that we expect and trust.

  • Steve F. about 4 years ago

    I like the combining 7 units together and receiving a better rate. Insurance costs are important when owning apartments. We also like your easy service.

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Agency's Business Hours

  • Monday 9:00 AM – 4:00 PM
  • Tuesday 9:00 AM – 4:00 PM
  • Wednesday 9:00 AM – 4:00 PM
  • Thursday 9:00 AM – 4:00 PM
  • Friday 9:00 AM – 4:00 PM
  • Saturday Closed
  • Sunday Closed
  • Mon 9:00 AM – 4:00 PM
  • Tue 9:00 AM – 4:00 PM
  • Wed 9:00 AM – 4:00 PM
  • Thu 9:00 AM – 4:00 PM
  • Fri 9:00 AM – 4:00 PM
  • Sat Closed
  • Sun Closed

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