I'm writing this review 19 years after having worked with Charlie Deaver because I am so grateful right now. When we started rebuilding our house in 2006, I looked to the Dave Ramsey recommended providers and Cornerstone came up. I worked with Charlie Deaver and he set up our home, auto, and life insurance providers. Fast forward to 2025. My house burned down in Altadena. I didn't realize what great coverage I had until now. I am so grateful to Charlie Deaver and Cornerstone for setting us up with great homeowners insurance. Thank you Charlie if you're still there! You are the best! read more

Best decision I've made with my 95 year old mother! She and I were searching for a homeowners policy after some disappointing service to update the policy with her company of 50 years. Nick responded quickly, efficiently and with the best coverage for the price out of 4 quotes from my top choice insurers. He followed up after we signed to find a significant multi-policy discount with my car as my mother was listed as a non-driver. What more could I ask for? read more

For me , the face of this company is Chris. I called the company branch in Burbank and what I got was an amazing experience and absolute help. I had concerns regarding my health insurance and how to navigate through the complicated avenues. Chris was better than google in maps, he was so professional, detailed and knowledgeable but most of all patient and helpful, even though he probably knew that I was not going to buy anything from him or his company at the time. Honestly these are the type of customer oriented professionals we need today. Thank you Chris. read more

I had a recently had terrible interaction with my long term (over 20 years) State Farm agent this week and after deciding to sever my business relationship with him, I'm contemplating doing this glitteratzy wave thingy, while looking him squarely in the eye without uttering a single word...because you know, women should be quiet and all. 20 years with him and he left me without Ca Earthquake insurance when I swapped to another company better suited to handle only my short term vrbo rental needs. I intended on keeping my car, home and home earthquake insurance and my $3 Million umbrella policy with him. I mean, I was actually without earthquake insurance for 6 weeks at my beach condo in San Diego because of this guy. Unreal. During my time trying to fact find as to how and why that could happened, he asked me if I could stop talking so he could have the floor.......crickets. "Sure," I finally said. He said it was up to me to know that if I cancelled the home owner policy I wouldn't be able to have freestanding earthquake policy. "Hmmm" I finally said, breaking my mandatory "silence." "After being with you for well over 20 years and now being 72 years old when was I supposed to take the insurance training to learn YOUR job??!?" Enter in Cornerstone Insurance. Nick came to my rescue and within 24 hours I had new earthquake insurance and will be firing State Farm. Im thinking of glitter bombing his office and having my friend video it as I hold a sign that says "You are fired!" Nick was kind and efficient and listened and didn't talk on top of me. I feel like I was sent a gift from God just when I needed it most. Im transferring my sizable account to Cornerstone. read more

I currently use Cornerstone for all my personal insurance needs (Auto, Home, Health, Life) and I also use them for my small business insurance. They were able to find the best policy for my retail baby shop. Prompt correspondence when I need to talk to someone and very friendly staff. Highly recommend! read more

This was my first experience getting business insurance. I found them to be helpful and responsive to my needs. I would recommend them and will use them again in the future. read more

I would give Cornerstone (and primarily, Ian Martin) 6 stars if I could. I have been a bit traumatized in the past finding individual insurance and had a basket-load of anxiety starting this process. I was incredibly happy with the speed at which Ian responded to my inquiry and found me a great plan. Sadly, the plan did not cover the hospital I had my heart set on to deliver our first baby (due June 2014). Even after we realized we wouldn't be going with one of Ian's providers, he gave us his time and expertise answering all of our insurance questions. *The surprise ending is that our hospital signed a contract and we were happily able to go with Ian's original plan. =D In summary, if you want someone who knows his stuff, is quick to help and is just plain amazing to work with - call Ian. read more

I'll start off by saying that I don't have experience with their personal insurance services. However, I had to call in and request HOA insurance along with the many endorsement pages on my client's property. I dealt with Kari Janzen who was nothing short of pleasant. She made sure I had everything I needed and was polite as well as patient with my questions. It sounds a bit ridiculous, but in my job, I deal with a lot of insurance agents and providers who are incompetent and at times rude -- Kari is the complete opposite. If any new customers are looking into this company, I would recommend trying to get in touch with Kari for your insurance needs. read more

Got nothing but amazing customer service from Ian Martin at Cornerstone Preferred Insurance. We initially went to them because they were a Dave Ramsey Endorsed Local Provider and we can see why. We used to have 21st Century auto insurance and had many issues with billing and customer service. One of which was getting monthly notices that our insurance was going to be terminated if we don't pay the balance. The problem with it was that the balance wasn't due yet and we were enrolled in automatic payment. So we decided to look for another provider. Ian has been really helpful in getting us a plan with comparable rate and coverage as well as making sure that we had everything we needed to get the discounts that we were eligible for. I am so thankful for making the switch and so impressed with the effective communication that I've had with Ian Martin. We switched over two cars with two drivers. read more

You buy insurance with the hopes you'll never have to use it...but when you do, you hope the experience is a decent one. Well, Sarah King has taken phenomenal care of our family and our insurance needs. I was recently involved in a claim, and she literally walked me through each step of the process, including getting me on the phone directly with the carrier, whose service levels have also been nothing short of spectacular. She is very easily accessible/responsive. We are extremely pleased with Sarah and Cornerstone, and are grateful for the way they take care of us. read more

I have worked with Cornerstone as a business partner, and they have also handled my personal health and liability insurance. They are professional, thorough, and just a bunch of really nice people. I highly recommend them! read more

Charlie is a great guy to deal with. He worked with me for a couple weeks finding multiple forms of insurance, and explained every facet from every policy. He made everything easy to understand and was able to answer any and all questions. He is extremely knowledgeable which is very helpful for someone who doesn't know a lot about how insurance works. On top of that, he's easy going and always seemed to be available the minute I had any questions. I look forward to continuing to work with him. read more

Extremely amazing service! I needed my insurance urgently and my neighbor referred to Charlie. After I left voicemail to him, he called me back immediately and solved the issue instantly! Charlie even explained to me pros and cons of the insurance in detail. Charlie is very responsive and gave me further advise. I highly recommend them! read more

NO HELP - NO CUSTOMER SERVICE I've had my homeowner's insurance through United Agencies (Cornerstone Insurance) and its predecessor agencies for 42 years and never filed a claim. Last October (2014), I received a letter of non-renewal from Unigard Insurance (QBE) primarily because they allege my main electrical panel is a potential fire hazard. The cost for replacement is about $3,000. I e-mailed my Cornerstone agent, Mary K., that two licensed electricians and the City of San Marino Fire Marshall didn't have a problem with the panel. I asked her to please find me another carrier. A month passed with no communication from Mary so I called her. Her response was that if I didn't replace the panel, the only option was to place me with the California FARE Plan, the insurer of last resort. What an absurd statement! Then, I e-mailed Cornerstone president, Jim Stone, explaining the problem and my wish to be placed with a new carrier. I received a robo-response with a promise to follow up. A month later in February I received a voice-mail from a staff member, but by that time, it was TOO LITTLE, TOO LATE. Doing my own research, I found that Amica, Farmers, State Farm and USAA have no issue with this panel. Now, I have a new carrier with better coverage for less money, and I am with an agent who cares. read more

This company is amazing! The customer service is beyond any I have ever received. One of the best parts about switching my auto insurance with Cornerstone is ...drum roll please...They saved our family over $600 annually! And we got better coverage!! I highly recommend this company to anyone looking to save some money. read more

I was eager and excited to be able to set up a plan with this insurance company as my husband and I prepared to buy our first home. I have many friends who use cornerstone and have had fabulous things to say. I called for a standard home policy, and they ended up recommending a different kind. No problem, and things kept moving along. At some point there was a miscommunication between the lender and Cornerstone, and a few days before escrow was scheduled to close our lender asked us to switch to the standard policy I had originally asked for. They said they needed to have a quote that day, so I quickly called and emailed the agent I had been working with. Sadly I got a short email stating that it wasn't fair to him the lender had changed their mind and he was no longer interested in working with us. All in all we were just bummed because we wanted to specifically support this company but were tossed out due to a miscommunication on the escrow side. read more

I was shopping for transitional health insurance so I would be covered in California as well as my new location out of state. I spoke with Ian Martin who could not have been more helpful and informative. He explained to me that it would be in my best interest to purchase insurance in my new state since my move is imminent. He even went the extra mile and emailed me three referrals in my new city. I really appreciated how I was treated.I would urge anyone to give Mr. Martin and his colleagues a try. read more

I got their info from my health insurance broker (who I love) as I was looking for a broker who could help lower my car, condo and umbrella insurance payments. Spoke with Charlie Deaver, who was knowledgeable and patient as I wanted to compare my current policies to new ones, apples to apples. He was able to find me comparable insurance in all categories which saved me more than $600! Very easy experience! read more

Called this company after reading their good reviews, hoping to set up some car insurance for a vehicle we had just purchased for our son. The person answering the phone asked if we were referred to a specific agent, to which I answered 'no'. She responded that this was fine, she would send us to (won't name the specific agent -- that's not important). Phone call was transferred, and the agent's voicemail informed us that he was out of the office for 3 days. So either the front desk person was unaware of which agents were and were not available, or the individual agent had left an old voicemail on his line. Either way, it felt a bit like hitting 'customer service brick wall' at a time when we needed some quick answers, and certainly left us with a poor impression. Needless to say, we decided to move on to another company. read more

I have been a loyal customer for close to 5 years and I am very satisfied with the way they watch over my account, if there is a chance to save you money they will let you know, this is something that I have never gotten from my previous agents, I highly recommend them. read more

My co-workers introduced Ian when I was very unhappy with the other major insurance company. Ian was so quick in responses to my questions. I'm so happy I've found him. I would refer anyone who's looking for a great agent. read more

Jim Stone and Ian Martin are very helpful and their response time is great. i would highly recommend Cornerstone.

Charlie was great helping us find homeowner's insurance. As first time home buyers with a lot of questions, Charlie walked us through the process and helped us find the best insurance at a great rate. He was always quick to respond and even sent us a lovely thank you card! Couldn't recommend Charlie and Cornerstone Preferred Insurance enough!! read more