About Ouwens Casserly

Ouwens Casserly is a dynamic & innovative property firm based in South Australia, selling more than 1000 homes a year and managing close to 1700 investment properties.

We Specialise in

Residential Sales

View the latest premiere properties in South Australia.

Property Management

Learn about the OC advantage.

Project Development Sales

Full 360 degree service from branding to sales.


The right Auctioneer can make a difference.

Our Values

Established by Alex Ouwens and Nathan Casserly in 2014, OC has sold more than $7 billion in property and employs a team of more than 100+ passionate property professionals. We are a business that is built on great people, strong leadership and a commitment to exceeding customer expectations.

Our vision is to be the most trusted and well-respected agency in SA, with the sole purpose of helping people to realise their dreams and aspirations through property.


In every minute of every day. Genuine, ethical, trusted, accountable.


About working hard and having fun. We love what we do and we love helping people.


Our operation is innovative and world class. Our process, training and standards ensure exceptional service and results.


In our attitude. Positive, upbeat and energetic.


Greatest Imaginable

Our success is born of culture, professionalism, and a genuine desire to help people reach their goals through property.

Our professionalism

our attention to detail, our skill in managing, marketing, and negotiating the sale of properties is how we build our reputation. It’s what we do.

Our culture

is our greatest asset. Our positive attitude, passion for real estate and unblinking faith that our colleagues have our back is what sets us apart, it’s what makes us different. It’s how we make it happen.

Our goal

is to help people realise their dreams and aspirations through property. When a vendor puts their home in our hands, it’s the ultimate compliment.


With representatives in every Ouwens Casserly office, our nationally recognised Community Committee is focused on projects close to our hearts and our homes. Supporting the needs of the South Australian community, we work alongside local innovators, artists, and charitable organisations to boost social and economic well-being around us.

Learn about our community involvement

Our History

A walk through Ouwens Casserly's journey to being one of SA's top award winning real estate agencies,
dedicating their passion through the years to making South Australian's property dreams come true.

  • 2023
    Year - 2023
    • Elders Real Estate Glenelg Acquisition in Nov
    • REISA WINNER Community Service in Oct
    • REISA SILVER Residential Agency – Large in Oct
    • REISA BRONZE Property Management Agency – Large in Oct
    • Elite Real Estate Acquisition in Oct
    • Nathan Casserly keynote speaker at the Australian RE-MAX Top Performer Conference (Fiji) in Jun
    • Bayly Real Estate Acquisition in May
    • REBs FINALIST Major independent of the Year in May
    • REBs WINNER Social and Community Service Program of the Year in May
    • REB Australia's Top 50 Sales Office
    • AREAs WINNER Residential Agency of the Year in Apr
    • AREAs #2 Apartment Campaign of the Year – OTTO Townhomes in Apr
    • OC Headquarters Eastwood opening in Mar
    • OC Lonsdale office opening in Jan
    • Timms Real Estate Acquisition in Jan
  • 2022
    Year - 2022
    • Real Estate Business Major Independent of the Year Award
    • 11 Ouwens Casserly agents in the Real Estate Business Top 50 Agents list for South Australia
    • Silver for Residential Agency – Large at the REISA Awards
    • Silver for Property Management Agency – Large at the REISA Awards
    • Silver for Project Marketing – Developments at the REISA Awards
  • 2021
    Year - 2021
    • Ouwens Casserly launches new generation website & implement paperless office
    • Ouwens Casserly Real Estate undergoes first brand refresh
    • Ouwens Casserly Real Estate are finalists for 5 categories in the Real Estate Business Awards 2022
    • Introduced online auctions
    • CEO Appointed
  • 2020
    Year - 2020
    • Engagement staff survey results show that 100% of our employees are proud to work at OC
    • Ouwens Casserly conducts first Careers Webinar
    • Introduced online auctions
    • COO Appointed
  • 2019
    Year - 2019
    • Ouwens Casserly Real Estate opens office in Kensington
    • Ouwens Casserly founds the Community fundraising Committee
    • Ouwens Casserly Projects wins the Marketing Excellence Awards at UDIA
    • Ouwens Casserly Projects win gold for Project Marketing Developments at REISA
    • Acquisition of a proportion of the Connekt rent roll
  • 2018
    Year - 2018
    • Ouwens Casserly Real Estate opens office in Unley
    • Ouwens Casserly Henley Real Estate moves into new state-of-the-art office located in Henley Square
    • Ouwens Casserly Projects win gold at the REISA Awards for Project Marketing Developments
    • Acquisition of Belle Unley rent roll
  • 2017
    Year - 2017
    • Ouwens Casserly Real Estate opens office in McLaren Vale region in Willunga
  • 2016
    Year - 2016
    • Alex Ouwens and Nathan Casserly speak at Australia’s largest real estate conference, AREC.
    • Alex Ouwens and Nathan Casserly feature on the cover of national real estate magazine, Elite Agent.
    • Ouwens Casserly Projects is founded
  • 2015
    Year - 2015
    • Ouwens Casserly Real Estate lead the way with an Australian-first for open inspections by introducing virtual reality goggles
    • Alex Ouwens is elected President of The Real Estate Institute of South Australia
  • 2014
    Year - 2014
    • Launch of Ouwens Casserly Real Estate (better known as OC) Founded by Alex Ouwens & Nathan Casserly
    • Ouwens Casserly Real Estate opens 2nd office at Henley Beach
    • Adam Blight & Greg Blight merge with Ouwens Casserly Real Estate to form Ouwens Casserly Property Management at Collinswood.
  • 2013
    Year - 2013
    • Franchise sales office becomes number 1 for the group in SA
    • Advisory Board established
  • 2012
    Year - 2012
    • Alex Ouwens & Nathan Casserly start a franchise sales office at 200 East Terrace, Adelaide

Corporate Partners

Annual Award Partners

Training Partners

Community Partners

We are here to help.

Our purpose is to help people realise their dreams and aspirations through property. Whether you are selling, buying, investing, renting or developing we are here to help achieve your property goals.