Katherina Kostrzak-Adams

Katherina Kostrzak-Adams

Principal / Licensed Real Estate Agent at Ray White Kurrajong
  •   4.9   (265 reviews)
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    Consistently meets client expectations for property purchase price.

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 265 reviewsacross 21 different locations, showing 6.
Review Katherina
Buyer review
Best realestate agent ever!!
4 days 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.

Buyer review
Katherina is amazing!
2 months ago
Katherina is amazing!

Katharina has been great throughout our buying experience. Her communication is always thorough and quick. Any hesitations or questions I had, she worked through them with me. Can’t recommend working with her enough.

Seller review
An overall great experience
3 months ago
An overall great experience

From the outset, Katherina and Zeke provided clear and practical advice that gave us real confidence in the process. Their knowledge of the local market was obvious and helped us position the property correctly. Communication was excellent throughout — we were always kept informed and knew exactly where things stood. The property sold quicker than we anticipated and at a fair price. We wouldn’t hesitate to recommend Katherina and Zeke.

Buyer review
Communicates with honesty and integrity.
3 months ago
Communicates with honesty and integrity.

Kat was very supportive throughout the buying process. I was initially skeptical due to the industry wide reputation of real estate agents, however looking back on the process and the communication I had with Kat I can confidently say she was honest and transparent in her communication, acting with integrity throughout. I hope the need does not arise in the near future, but should I require the services of a real estate agent, I would have no hesitation in reaching out to Kat. Thank you Kat, Zeke and the Raywhite Kurrajong team.

Buyer review
Great communication
5 months ago
Great communication

Katherina was outstanding from start to finish. Kat’s communication was clear, consistent, and always timely, which made the whole process stress-free. Kat went above and beyond to make sure we found the right home, and it truly felt like she did everything possible to get us the best outcome. We couldn’t be happier and highly recommend Katherina!

Seller review
Thank you!
5 months ago
Thank you!

Katherina and her wonderful team did an outstanding job at selling our property in Blaxlands Ridge. From getting the property on the market, organising the open homes, to communicating with us, every single step was done with care and attention to detail. Her and her teams efforts are commendable, and most importantly, we were thrilled with the selling price!

Show all 265 reviews

Katherina's properties

Katherina has 6 properties for sale and sold 27 properties in the last 12 months, showing 4, sorted by most recent activity

For Sale
Just Listed
9 Chestnut Drive
Glossodia NSW 2756
3
1
3
House
SoldMay 4, 2026
$900,000
20 Florence Avenue
Kurrajong NSW 2758
4
1
1
House
Under Offer
Just Listed
57 Old Bells Line of Rd
Kurrajong NSW 2758
3
2
2
House
SoldApr 29, 2026
$2,320,000
101 Peel Parade
Kurrajong NSW 2758
5
3
3
House
Show all 33 properties
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