State Farm® Insurance Agent Greg Kostuk
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Our customers are the center of our universe and we’re grateful for them. If you’re willing to share your experience about your interaction with our agency, it’ll be a great help for other people looking to make smart and confident decisions about their insurance and financial services.
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What our customers say about us...
Jason Dimelow
November 21, 2025
"Mike Sena was great, got me a lower rate. Thanks!"
Mark Pugliese
November 21, 2025
"Very helpful great working you Steve great job thank you"
Sid Farber
November 13, 2025
"My experience working with them has been excellent. Mike Sena is always there to answer my questions and help me get the best deal!"
Andrew Shirk
November 13, 2025
"Mike is the man, always helping me out!"
Nathan Mccoy
November 12, 2025
"Justin was on top on my questions. I sent an email requesting some info and he called promptly and was able to answer all my question and get me the documents I needed."
Diane
November 11, 2025
"Zach, the office manager, is a magician!! He figured out how to reduce our daughter’s rate by over 25%! I spoke to another person and they weren’t able to do this. So, always, ALWAYS ask to speak with Zach as he definitely has your back!😉 P.S. I highly recommend this Agency for their outstanding service!"
Saul Silva
November 11, 2025
"Straight to the point, real easy communication and explanations. Goat"
Kimberly G
October 31, 2025
"Zack was fast to act and help us with our needs. I have used State Farm for over 40 years exclusively and they have never disappointed me. I would highly recommend!"
Todd Threw
October 30, 2025
"Jacob was extremely helpful throughout the whole process. He was very engaging and informative in adding home insurance for our new home. He kept me up to date on what was needed from the start."
Kassie Little
October 29, 2025
"Justin was great with helping us get our coverage transferred from Massachusetts to Colorado. Thank you for your support!"
"Thanks for your kind words! We’re glad Justin made your coverage transfer easy. Let us know if you need anything else! - Greg Kostuk Insurance Agency"
John
October 20, 2025
"Amber did a great job w my claim"
"Thanks so much for your kind words! We’re really happy to hear that Amber took great care of your claim. If you ever need anything else, just give us a shout! - Greg Kostuk Insurance Agency"
Christine Hunter
October 16, 2025
"Justin made this so easy!!! Thank you"
"We're so glad to hear Justin made everything easy for you! Thank you for your kind words. - Greg Kostuk Insurance Agency"
Dana H
October 15, 2025
"Great experience working with Justin! Found all the ways to get me the best rate and best coverage on my new home purchase!"
"We're thrilled to hear about your great experience with Justin! Helping you secure the best rate and coverage is our top priority. Congratulations on your new home! - Greg Kostuk Insurance Agency"
Virgilio Balmori
October 9, 2025
"Amber Cantu did a great job! She was professional, friendly, and made the whole experience smooth from start to finish. Her customer service skills are excellent — she really takes the time to listen and make sure everything is done right. Highly recommend working with her!"
"We’re happy to hear Amber’s customer service made a positive difference from start to finish. Thanks for sharing your great experience! - Greg Kostuk Insurance Agency"
WalkerParker
October 9, 2025
"Jacob Turbett, along with the entire Kostuk office, has been nothing short of incredible to work with. They are all so kind and work really well as a team. Jacob has went above and beyond in getting our new policies setup, with the best customer care we have experienced. Thank you guys!"
"Thanks so much! It’s great to hear Jacob went above and beyond and that the whole team made a positive impact. We truly appreciate your kind words! - Greg Kostuk Insurance Agency"
Mao Lachis
October 9, 2025
"I mean Jacob was the most helpful agent I could have asked for, he answered all my questions and made everything understandable. Thank you again."
"Thank you for your kind words! We’re glad Jacob was able to answer all your questions and make everything clear. We appreciate your trust! - Greg Kostuk Insurance Agency"
Bryan Applegate
October 8, 2025
"Zack was very helpful and thorough. I would highly recommend working with him."
"Thank you for your kind words! We’re glad Zack provided helpful and thorough service. We appreciate your recommendation! - Greg Kostuk Insurance Agency"
Tori Carlson
October 7, 2025
"Greg was the most helpful agent. Truly wanted to help get me everything I needed and answered all of my questions and then some ."
"Thank you for your kind words! We’re glad you received thorough and helpful service. We appreciate your trust! - Greg Kostuk Insurance Agency"
kristie Hays
October 6, 2025
"Justin was fantastic to work with! Very easy to get quotes from and very knowledgeable!"
"Thank you for your kind words! We’re glad Justin made the process easy and provided knowledgeable service. We appreciate your support! - Greg Kostuk Insurance Agency"
Christy Smith
October 6, 2025
"Greg has connected personally even when I didnt purchase insurance. I actually saved his contact. He was very straight forward. I plan on going with the life insurance. He explained everything!"
"Thank you for your kind words! We’re glad we could provide clear and straightforward information, and we look forward to assisting you with your life insurance needs. - Greg Kostuk Insurance Agency"
diana harder
October 3, 2025
"David Harder and myself Diana Harder have been real estate broker for 30 years in the Littleton and Denver area. We are very pleased with Justin Miller from State Farm and the services he recently provided to our clients! His knowledge and listening skills and guidance for what we needed for our clients need was exceptional! We highly recommend Justin Miller, and this State Farm agency!"
"We’re grateful for your positive feedback! It means a lot that Justin’s knowledge and attentiveness have made a difference for you and your clients. Thank you for recommending our State Farm agency! - Greg Kostuk Insurance Agency"
Hannah Harder
October 3, 2025
"I am Hannah’s mother… using her account her for review. My husband and I David Harder have been very fortunate to refer our clients to Justin Miller! We are real estate brokers with 30 years experience. We are very protective of our clients. We were very impressed and pleased with Justin’s knowledge and his good listening skills and taking care of our clients! We highly recommend Justin Miller and State Farm if you were looking for automobile, life or homeowners insurance! -David and Diana Harder Littleton, Co."
"Thank you for your thoughtful recommendation! We’re honored that you and your husband trust Justin to take care of your clients. We appreciate your support and look forward to serving you and your referrals! - Greg Kostuk Insurance Agency"
James Sheehan
October 1, 2025
"Worked with Jacob today to setup insurance for a secondary car that was in an accident that I wanted to put back on the road. Jacob worked with me and took into consideration the policy I was looking to get and lined things up perfectly. He took additional time to educate me on the different policies and what I should sign up for to be safe and protected while also not breaking the bank. All in all, I feel I settled on a policy that made sense to me. I can't thank Jacob and the State Farm office enough for the continued care they provide on every call. Thanks Jacob!"
"Thank you for your detailed and positive review! We’re delighted to hear that Matt at Greg Kostuk Insurance Agency assisted you seamlessly in transitioning your insurance from New York to Colorado for your new car. It’s gratifying that he collaborated with you to customize a policy that met your needs at a fair rate, while thoroughly addressing all your questions to ensure your confidence in the decision. We’re proud that Matt had you fully insured in just two phone calls while going above and beyond to assist in matters beyond his immediate responsibility. This reflects both his character and the values of our State Farm office. We deeply appreciate your trust and recommendation for your auto insurance needs—thank you for choosing us, and a special thanks to Matt for his outstanding service! -Greg Kostuk Insurance Agency "
Jingsi He
September 29, 2025
"With the great help from Justin Miller, I got my auto insurance and renter insurance arranged in a prompt manner. It was a short notice with quite some changes, but Justin managed to get it done for me. Thanks!"
"Thank you for your kind words! We’re glad Justin could assist you promptly and handle the changes smoothly. We appreciate your trust! - Greg Kostuk Insurance Agency"
Aaron Hills
September 25, 2025
"Great customer service and great insurance at a affordable price."
"Thank you for your kind words! We’re glad you’re happy with our service and affordable insurance options. - Greg Kostuk Insurance Agency"