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📍 Sales Representative 📞 905-431-1764 | ✉️ racheal@rachealcostello.com
With over 30 years of experience in client service and as an educator, I’ve dedicated my career to helping people navigate some of the most important decisions in their lives. My passion for guiding others, combined with an in-depth knowledge of the housing market, has led me to my dream career in real estate. I’m committed to providing my clients with personalized, expert advice every step of the way.
As an Irish Immigrant who has bought and sold multiple properties, I understand the importance and the difficulty of navigating the process of buying or purchasing your home.
This insight allows me to offer valuable guidance, ensuring that you make the best decisions throughout your journey. I approach every client relationship with honesty, wisdom, and care, making sure your goals are always at the forefront.
Backed by extensive real estate education, ongoing professional growth and a strong team, I bring a unique blend of expertise and compassion to each client relationship.
Let’s work together to find the perfect place to write your next chapter. ☘️
Meet The Team
Meet The Team
Owen McGuirk
Owen McGuirk
Born in Ireland and raised in Oshawa, I have proudly called Clarington home for most of my life. Real estate has always been a natural fit for me—I thrive on building lasting relationships, problem-solving, and ensuring my clients feel empowered in their decisions. With a deep understanding of the buying and selling process, I specialize in residential real estate, investment properties, and home renovations. My passion for real estate keeps me sharp, constantly learning and adapting to market trends so my clients get the best possible results.
Tina Abernethy
Tina Abernethy
As a lifelong Durham Region resident, I have a deep appreciation for the vibrant communities that make up this area. Since becoming a licensed realtor in 2014, I’ve combined my background in Community Development and Counselling with my passion for real estate to provide exceptional service and guidance to my clients. With 20 years of experience living on a rural farm, I have developed a strong niche in country properties while also excelling in all aspects of residential real estate. My mission is to create a seamless experience, offering strategic advice, top-tier market insights, and access to a trusted network of professionals.
When The Nook Realty first opened in 2018, they were operating out of Durham Region’s trendy Bowmanville Factory. After expanding their team of agents, The Nook has since opened a new Downtown Bowmanville office in a beautiful old century building on Church Street!
When The Nook Realty first opened in 2018, they were operating out of Durham Region’s trendy Bowmanville Factory. After expanding their team of agents, The Nook has since opened a new Downtown Bowmanville office in a beautiful old century building on Church Street!
The Nook Realty has been recognized by Metroland Media’s Popular Reader’s Choice Awards as the #1 Real Estate Brokerage in both Clarington & Durham Region as a whole in 2020, and most recently the #1 Real Estate Brokerage in Clarington & Oshawa/Whitby for 2021.
The Nook is not a real estate team. It is a collective of individual Real Estate Salespeople, all committed to providing their clients with the same consistent level of care, in tune with The Nook’s values and business model. Everyone has access to the same expert team of mortgage brokers and an exclusive interior designer/stager who are all committed to delivering a carefully curated customer experience.
Under the direction of Kelly Squires, one of Durham Region’s most successful real estate Brokers, The Nook has embraced a more modern and beautiful way to buy & sell.
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