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Beautiful, New Dental Office Modern Touches & Cutting-Edge Technology


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Two Arlington Heights dentists in dental office hallway

Dental Education & Prevention is at the Heart of Our Dental Office


Sure, we are here to help replace a missing tooth, enhance your smile or get you out of pain – fast. However, this is not our primary goal. In fact, our philosophy is just the opposite. Our top priority is to be an advocate near you. We want to help you learn how to properly care for your teeth and gums, so dental problems are prevented. Whether you have major dental issues or a perfect smile, you can count on a nearby dentist in Arlington Heights and team to answer all your questions and to build a healthy dose of education into every visit.

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Family Friendly Dentistry Makes it Possible for Everyone to Smile


For nearly 50 years, the dentists and team at Costello & DeHart Dental Excellence have been proud to serve the Arlington Heights community. We are honored to be seeing the third generation of families first treated by Dr. John when he opened his dental office in the Randhurst Mall. From coaching Little League to visiting schools with free, educational programs, we go above and beyond to help our friends and neighbors smile. Our patients routinely comment that they have never been treated better – anywhere – and Dr. Ernie looks forward to carrying-on the family tradition of exceptional dental care for the next 50 years in Arlington Heights.

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Dentistry with Affordability & Convenience in Mind Dental Care - Always with a Personal Touch


As with everything we do, Costello & DeHart Dental Excellence makes getting and understanding the cost of the highest quality restorative, preventive, cosmetic, and children’s dentistry simple and predictable. If dental insurance is influencing your decisions, we will work with you and your plan to maximize your benefits. If you do not have dental insurance, our in-house dental program makes exceptional dentistry affordable for you and everyone around you. Regardless of your situation, our team – led by Liz– takes the time to help you understand all aspects of your care and ensure financial concerns do not stand between you and the smile of your dreams.

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Comprehensive Dentistry Under One Roof

Costello & DeHart Dental Excellence prides itself on being able to provide many different services in one convenient office. Whether you’re looking for Invisalign to make your teeth straighter, a cosmetic dentist to bring your smile back to life, restorative dentistry to make it easy to chew food again, or simply a dentist who caters to your youngest family members, Costello & DeHart Dental Excellence is happy to be your dental home. Getting all your dental care done in your area without traveling all over town has never been easier!

Getting to Our Office in Arlington Heights

Is it time for your next dental appointment? Finding our office is easier than you’d think. Located in the heart of Arlington Heights, you can find our office near the Walgreens on N Arlington Heights Road. We’re also right across the street from the Thomas Middle School and North Arlington Pediatrics. From all of us Costello & DeHart Dental Excellence, we can’t wait to be your family’s home for dental care!