Sienna Berney

Office Manager
Mobile: 0431 302 023

CENTURY 21 The Property Partnership
27 Old Barrenjoey Road Avalon NSW 2107 Australia

Sienna Berney

Sienna Berney has steadily built a reputation as an approachable, energetic and reliable real estate professional.

Having managed a large property management portfolio in Newport, she has a clear understanding of how precious your investment property is and always goes the extra mile to make the selling process as effortless and stress-free as possible, as well as maximising the financial return for owners.

As a long-time Northern Beaches resident, her knowledge of the area gives her particular understanding of the local market and northern beaches lifestyle. Thanks to her strong background in hospitality, she has a natural ability in customer service, taking a personal approach to every property she deals with and treating all clients with respect and honesty.

An excellent listener with a friendly and approachable nature, Sienna’s reliability and transparent communication have allowed her to build her career with ongoing referrals and word-of-mouth recommendations.

Her tremendous capacity for hard work, along with her calm professionalism, have made her an invaluable member of the Century 21 team in Avalon.


Sienna, many thanks to you and Stephanie for the lovely card and gift you sent to Michelle and I. We were very touched and grateful for your kind generosity and words. We are absolutely delighted with the professional service we have received and it's been a delight to work with you. Michelle and I both think equally highly of you.
Michelle & Ron Rice

It has been an absolute delight having the ability to walk into an estate agent and feel at ease with the big decision of putting your house up for rent or sale.
At Century 21 Avalon the property management team headed by Sienna Berney were fantastic to deal with. They demonstrated professionalism and knowledge at all times within their chosen profession. They were friendly and open in their communication; there were no problems only solutions.
Being homeowners and extremely house proud we wanted to make sure that the prospective tenants they found for us were a perfect fit. Sienna kept us informed throughout the selection process and we are delighted with the weekly rental return and the tenants that will call our place home for the next 12 months.
I would not hesitate in recommending this fresh face to Avalon to future clients. Their service and professionalism stand unmatched in my opinion. In this highly competitive market you can feel reassured that you are in competent and supportive hands.
Kind regards,
Mr & Mrs Spencer

Thank you for your help in doing the rental for my property - you are a delight to work with and very efficient!
Judith Cook

Dear Sienna, I would like to thank you for all you help in enabling me to establish myself in the rental market. You made the process of finding tenants and managing my property in Newport easy and hassle free.
From the beginning you have always put my best interests foremost and conducted thorough checks on any prospective tenants. I have never received any complaints about the way the property is managed and any time there has been an issue with utilities or strata you have always dealt with it perfectly.
Once again I thank you very much for the way in which you conduct yourself in an extremely professional manner. I have no hesitation in using your services for any future rental investments.
Tessa Hoult

Dear Sienna, Thank you so much for supporting us the process of preparing the downstairs area of our house into rental accommodation and in providing the services of Century 21 Avalon to organise rental of this duplex.
We could see that your advice and knowledge helped us create a more rentable apartment. We appreciated your open and transparent communication and your professional skills of efficiency, reliability and hard work. Your warm, personable and enthusiastic nature shone through in all your dealings with us and the prospective tenants.
You gave abundantly of your time and provided valuable advice which helped relieve the stress of renting out part of our property. We are very pleased with the whole process that resulted in us finding the right tenant.
Sienna, you were a delightful person to do business with – and we are pleased to highly recommend you and Century 21 Avalon as property managers.
Melissa Edwards and Rex Finch

Sienna was wonderful to deal with: she was professional and at the same time kind and empathetic. I would not hesitate to recommend Sienna as a letting agent.
Vivianne Elliot

In my opinion Sienna handled my property letting in a friendly, professional and efficient way and I would not hesitate to do business with her again.
John Scali.

Thank you so much for all your help and how quickly you have done everything for us, we so appreciate it! I am so busy right now and can't tell you how fantastic it’s been dealing with you! Such a pleasure! We are so excited to move into this cute house!
Jayde Leeder

Century 21 certainly lived up to its slogan to be 'Smarter, Bolder, Faster' when it came to the sale of our Avalon Beach property. We were looking for this in an agency, and having just purchased a new house from Stephanie Hammond's recently established agency in Avalon, we put our house on the market immediately.
Stephanie, Sienna and the team were just brilliant; efficient, personable and great communicators - the key to a successful vendor-agent partnership. After 3 ads and some great editorial coverage in the Manly Daily and Sydney Morning Herald, interest in the property really hotted up and we sold our home in Palmgrove Road to a lovely local family who fell in love with it, as we had 11 years before. Four weeks from start to finish! A really great story and fabulous outcome for everyone concerned.
We were delighted to work with Century 21 who made the whole selling/buying business really enjoyable.
Katherine Roberts and Jonathan Coles
“Anne and I wish to express our deep appreciation for the way that both Stephanie and Sienna handled all aspects of the sale of our place in Wandearah Ave, Avalon. They both gave a refreshing ‘old fashioned’ honest approach to the whole exercise – both from our perspective as Vendor and to the happy purchasers – we are all very thankful for your diligent efforts.
Anne & Graham Fenwick