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Ann is a dedicated, full time real estate broker who takes the time to understand her client’s needs every step of the way. Resourceful and experienced, she specializes in residential, waterfront and land properties, and has helped hundreds of sellers and buyers make their next move.  

Starting her real estate career in 1996- she understands the importance of having a trusted professional on your side and one that keeps up with our ever changing market.  She loves what she does, is a good communicator and will work hard to earn her clients trust.

Ann developed her strong work ethic at an early age- being the eldest of eight siblings; and worked part-time in her family’s restaurant starting at age nine. Family and community are very important to Ann’s life.

Ann has two grown daughters, a grandson, and lives in her home in Augusta. She can be found supporting her grandson at his many sporting events, gardening and spending time outdoors.  

Whatever your real estate needs- Ann will listen and guide you through the whole process, making for an successful and enjoyable move!

 

Ann Castonguay
AnnCastonguay
Client
Thoughts

- Thomas Donegan

Thank you so much Ann is a wonderful agent I would highly recommend her.

- Joe DeProfio

Great person to work with very conscious of your needs and concerns, great communication every step of the way, perfect!

- Roy & Diane Meyer

Definite 5 star rating throughout the sale process.
Thank you Ann for your support!
We appreciated your effort, the great communication with Diane and me, and your ability to make everything easier to understand.
Thanks again, Roy Meyer

- Lynda Ross, Buyer

Ann was a wealth of knowledge about the process for purchasing a property. She always had my best interest through the entire transaction. She really ensured all the details were addressed and worked tirelessly behind the scenes to ensure the process went smoothly. In addition to her insightfulne... VIEW MORE TESTIMONIALS

- Sheldon Wheeler, Seller

After interviewing three other very competent Agents, we ultimately landed with Ann Castonguay of Sprague and Curtis and are so grateful for it. Ann brought the exact mix of expertise in the field, a very impressive local knowledge of the area, and a tenacity/work ethic beyond expectations. She met... VIEW MORE TESTIMONIALS

- Martin & Welida Smith, Seller

A Five-Star Experience--And Then Some! My wife and I have worked with professionals from all walks of life, and I can confidently say that Ann Castonguay is, without a doubt, Maine's best Realtor. If we could give her more than five stars, we would--without hesitation. We recently made th... VIEW MORE TESTIMONIALS

Disclaimer: All information deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. Neither listing broker(s) or information provider(s) shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. Listing(s) information is provided for consumers personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information on this site was last updated 10/30/2026. The listing information on this page last changed on 10/30/2026. The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of Delta Media Group MLS (last updated Fri 10/30/2026 5:07:57 PM EST) or MREIS (last updated Fri 10/30/2026 5:06:09 PM EST). Real estate listings held by brokerage firms other than Sprague and Curtis Real Estate may be marked with the Internet Data Exchange logo and detailed information about those properties will include the name of the listing broker(s) when required by the MLS. All rights reserved.
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