Katherina Kostrzak-Adams

Katherina Kostrzak-Adams

Principal / Licensed Real Estate Agent at Ray White Kurrajong
  •   4.9   (270 reviews)
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About Katherina

According to Katherina, her success is a direct result of her strong business principles. “I pride myself in conducting my business with honesty, integrity and professionalism”. “The process of selling and buying a house is a big deal and its one that I want my clients to enjoy - which is why I make it my priority to ensure a pressure and stress-free environment for my clients”. Katherina is the market leader in Kurrajong and specialises in the Hawkesbury in both acreage and residential. Katherina combines business experience in client services with client communication. Having worked for the Ray White family for 20 years, Katherina has gained recognition and has achieved the prestigious title of an Elite Performer for consecutive years 2014 - 2020 and 2021 - 2023 and Premier 2024, 2025 and 2026 whilst working in the Ray White Kurrajong office. In 2018 Katherina was also awarded Number 6 Selling Principal for NSW Metro Offices. Katherina works as a professional whose commitment ensures she receives a high level of repeat business. She is extremely attentive to her clients’ needs and always keeps them informed throughout the sale process. Katherina and her husband Gavin Adams purchased the Ray White Kurrajong Office in 2016 and together have a great team. They work closely with buyers and utilise our extensive database to match buyers and properties resulting in shorter days on market. Katherina strives in enthusiasm from the commencement of the marketing campaign throughout to the negotiation and the sale process. She carefully supports the needs and expectation of her clients to ensure a smooth, seamless and successful process. Katherina is supported by her close knit team of experienced professionals, Katherina was honoured to receive the Principals' Office Recognition as Premier Business Leader 2024/2025. Ray White Kurrajong has been awarded Agency of the Year 2026 for Bowen Mountain and Kurrajong Heights. A true reflection of our local trust and dedication.

Katherina's reviews

  4.9  
Katherina has 270 reviewsacross 21 different locations, showing 6.
Review Katherina
Seller review
A consummate professional
10 days ago
A consummate professional

We had a very positive experience selling our property with Katherina. From the outset, Katherina and her team displayed their professional approach, and we benefitted from her deep market knowledge. Another highlight was Katherina’s communication, as she kept us updated throughout all stages of the process. We have no hesitation recommending Katherina and her team.

Seller review
Friendly and Professional
12 days ago
Friendly and Professional

We had a fantastic experience working with Kat and Olivia. As we had also purchased our new home through Kat, she really understood our situation and what we needed to achieve. Kat and Olivia struck the perfect balance between being friendly, approachable and laid back but also highly professional throughout the entire process making it smooth and stress free. Kats advice with our listing was honest and helpful. We highly recommend Kat and Olivia and the team at Kurrajong Ray White.

Seller review
Ray White Kurrajong  Katherina and team where so helpful with the Sale of our Home
19 days ago
Ray White Kurrajong Katherina and team where so helpful with the Sale of our Home

I had a nice connection with Katherina, felt confident and valued her options and experiences, regarding the Market Knowledge in the Hawkerbury Region. Katherina's Professionalism, Honesty, Strong Communications throughout the whole process with Selling our home. Always only a phone call away to discuss anything . What also stood out to me was Katherina's Dedication, Wheather she was working on behalf of the Seller or Buyer You got the same Work Ethic and Principals "She is a real Gem" Its a privilege to Recommend Katherina and her Team . We are so happy with outcome with the Sale of our Home. To Katherina, Gavin Olivia,Holly and Collectively of all the Team . Thank you so much Warm regards Anne and Trevor.

Seller review
Sale of our family home
28 days ago
Sale of our family home

From the moment we started speaking with Katerina, her and her team were professional and supportive. Katerina explained the process to us from start to finish, took the time to understand our family and our needs. Katerina and the team were completely transparent which allowed us to trust them and feel at ease and that they were doing the best thing for us. Communication and efficiency were next level. Nothing was a problem no matter the time of day.

Seller review
honest proactive go getter
about 1 month ago
honest proactive go getter

Katherina was fantastic throughout the entire sales campaign, we could not have asked for a better agent. Katherina and her team are very professional and have great knowledge of the local market. From the initial appraisal up until the house was sold we were kept in the loop and all process's explained in detail. If you are looking for an agent to sell your house I would not hesitate to recommend Katherina and her team.

Buyer review
Best realestate agent ever!!
about 2 months ago
Best realestate agent ever!!

Oh my god, where do we even start or even put it into words? I literally couldn’t have asked anybody better to help me buy my first home. It honestly wasn’t easy and was such a struggle in an emotional time, but from the start Katherina was honestly exceptional and everything we could’ve asked for from being there to guide me through the whole process for emotional support support and honestly just someone to lean on during the whole process communication was literally amazing and she’s made everything so smooth. She literally went out of her way and did beyond what her job requirement was and for that we are forever thankful for you. You really are one amazing lady and our amazing at your job. Thank you for being you. We couldn’t have got where we are today without you we appreciate everything you did for us and our boys.

Show all 270 reviews

Katherina's properties

Katherina has 2 properties for sale and sold 31 properties in the last 12 months, showing 4, sorted by most recent activity

For Sale
Just Listed
39 Waratah Street
Bowen Mountain NSW 2753
5
2
3
House
SoldJun 25, 2026
$1,200,000
137A Old Bells Line of Road
Kurrajong NSW 2758
4
2
4
House
SoldJun 17, 2026
$980,000
219 Spinks Rd
Glossodia NSW 2756
3
1
4
House
SoldJun 9, 2026
Price not available
9 Chestnut Drive
Glossodia NSW 2756
3
1
3
House
Show all 33 properties
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