Katherina Kostrzak-Adams

Katherina Kostrzak-Adams

Principal / Licensed Real Estate Agent at Ray White Kurrajong
  •   4.9   (277 reviews)

Katherina's sales performance at a glance

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

20
Reviews
35
Median days on market
8
Properties for sale
31
Sold properties
$1.4m
Average sale price
$44.4m
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 277 reviewsacross 21 different locations, showing 6.
Review Katherina
Seller review
Excellent  Result!
17 days ago
Excellent Result!

We couldn’t have asked for a better agent to work with. The team at Ray White Kurrajong went above and beyond our expectations. They guided us thru the sale process as smoothly as possible and with only 3 weeks of open homes found the perfect buyer for our family home. We were highly impressed by their weekly reports on all inquiries from buyers and communication back to us after each open home.

Seller review
Why go elsewhere?!
about 1 month ago
Why go elsewhere?!

I chose Katherina knowing I’d be doing myself a disservice if I went elsewhere. Holly was outstanding. I found her to be very supportive and calm during a stressful period. She was also kind and attentive. Olivia’s was lovely to interact with too, her energy brought the space to life, and it was a joy to see her flourish at the open homes. End result: they delivered. Effective marketing, incredibly responsive communication, professionalism in liaising between me and potential buyers, quick sale, market insights, honest feedback and recommendations, patience, and general positivity. Thank you!

Seller review
Katherina is very professional,very approachable,listens well and works very hard for best outcomes
2 months ago
Katherina is very professional,very approachable,listens well and works very hard for best outcomes

Not only was Katherina excellent in her manner and performance but she was also very caring and had our best interests at heart at all times. She was very approachable and willing to listen to our needs and worked very hard, and beyond expectations, to help meet those needs. Katherina also showed genuine enthusiasm and excitement for us, at the successful sale of our home.

Seller review
Honest and hard working
3 months ago
Honest and hard working

Katherina was honest and communicated fully with us throughout the sale. Katherina and the whole team went above and beyond to sell our home.

Seller review
Highly recommend
4 months 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.
4 months 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.

Show all 277 reviews
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Katherina's properties

Katherina has 8 properties for sale and sold 31 properties in the last 12 months, showing 4, sorted by most recent activity

For Sale
Guide $1,495,000
1064 Grose Vale Rd
Kurrajong NSW 2758
4
3
4
House
SoldOct 26, 2026
$875,000
269 Lieutenant Bowen Dr
Bowen Mountain NSW 2753
3
1
2
House
SoldOct 15, 2026
$1,380,000
328 Blaxlands Ridge Rd
Blaxlands Ridge NSW 2758
3
1
6
House
SoldOct 15, 2026
$1,277,000
1072 Grose Vale Road
Kurrajong NSW 2758
5
2
2
House
Show all 39 properties
See Katherina at work
Get a genuine perspective of what it’s like working with Katherina.
Inspections
East Kurrajong
Colo

Katherina's sold properties

Katherina has sold 31 properties in the past 12 months, showing 4.

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Property imageAddressBedroomsBathroomsCarparksProperty TypeClosing PriceDate Sold
269 Lieutenant Bowen Dr, Bowen Mountain, NSW, 2753
269 Lieutenant Bowen Dr
Bowen Mountain NSW 2753
3
1
2
House$875,000Oct 26, 2026
328 Blaxlands Ridge Rd, Blaxlands Ridge, NSW, 2758
328 Blaxlands Ridge Rd
Blaxlands Ridge NSW 2758
3
1
6
House$1,380,000Oct 15, 2026
1072 Grose Vale Road, Kurrajong, NSW, 2758
1072 Grose Vale Road
Kurrajong NSW 2758
5
2
2
House$1,277,000Oct 15, 2026
18/21 Vincents Road, Kurrajong, NSW, 2758
18/21 Vincents Road
Kurrajong NSW 2758
4
4
2
House$1,305,000Sep 7, 2026

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