Katherina Kostrzak-Adams

Katherina Kostrzak-Adams

Principal / Licensed Real Estate Agent at Ray White Kurrajong
  •   4.9   (273 reviews)

Katherina's sales performance at a glance

See how Katherina has performed in the last 12 months on RateMyAgent*

25
Reviews
39
Median days on market
6
Properties for sale
34
Sold properties
$1.6m
Average sale price
$52.8m
Total sales value

*Includes all properties sold (last 12 months) as lead and supporting agent and published on ratemyagent.com.au. It may not be complete and can exclude off-market, private sales and undisclosed pricing and sold dates. Contact agent for full sales history.

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    Consistently meets client expectations for property purchase price.

Katherina's customer service award

See the RateMyAgent award Katherina has won

  • 2x Suburb WinnerKurrajong Heights - 2024, 2018

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 273 reviewsacross 21 different locations, showing 6.
Review Katherina
Seller review
Highly recommend
24 days ago
Highly recommend

Katherina has been a fantastic representative for our home, and has achieved an excellent result in a short space of time. Nothing was too much trouble, and the communication from both herself and her team was second to none. Her work ethic, integrity and down to earth character has helped make the whole process seamless. We highly recommend Katherina and her team!

Seller review
Totally professional in every aspect. Excellent customer service and l recommend her to everyone.
about 1 month ago
Totally professional in every aspect. Excellent customer service and l recommend her to everyone.

Katherina from Ray White Real Estate at Kurrajong New South Wales is a woman who has excellent customer service skills and her communication in all aspects is outstanding. During the sale of my sister in-laws property she kept us thoroughly informed in respect to everything. Her knowledge in respect to the current house and property market is without question exceptional. On my sister in-laws behalf Katherina successfully negotiated and obtained the sale price of the property that was required. She is totally professional and a person of the highest integrity. I would have no hesitation in recommending Katherina to any person whatsoever who was considering in selling or purchasing a home or property.

Seller review
A consummate professional
about 2 months 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
about 2 months 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
2 months 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.

Show all 273 reviews
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Katherina's properties

Katherina has 6 properties for sale and sold 34 properties in the last 12 months, showing 4, sorted by most recent activity

SoldAug 13, 2026
Price not available
5 Sherwood Street
Kurrajong NSW 2758
4
2
2
House
For Sale
Just Listed
141 McMahons Road
Kurrajong NSW 2758
4
1
4
House
For Sale
Just Listed
59 Old Bells Line of Rd
Kurrajong NSW 2758
5
2
3
House
SoldJul 30, 2026
Price not available
40 Wattle Street
Bowen Mountain NSW 2753
5
2
3
House
Show all 40 properties

Katherina's sold properties

Katherina has sold 34 properties in the past 12 months, showing 4.

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Property imageAddressBedroomsBathroomsCarparksProperty TypeClosing PriceDate Sold
5 Sherwood Street, Kurrajong, NSW, 2758
5 Sherwood Street
Kurrajong NSW 2758
4
2
2
HouseUndisclosed PriceAug 13, 2026
40 Wattle Street, Bowen Mountain, NSW, 2753
40 Wattle Street
Bowen Mountain NSW 2753
5
2
3
HouseUndisclosed PriceJul 30, 2026
1106 Grose Vale Rd, Kurrajong, NSW, 2758
1106 Grose Vale Rd
Kurrajong NSW 2758
4
2
2
House$1,325,000Jul 27, 2026
39 Waratah Street, Bowen Mountain, NSW, 2753
39 Waratah Street
Bowen Mountain NSW 2753
5
2
3
HouseUndisclosed PriceJul 21, 2026

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