Peter Diamantidis

Peter Diamantidis

Director / Licensee / Principal at Ray White United Group | St Marys
  •   5   (521 reviews)

Peter's sales performance at a glance

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

51
Reviews
26
Median days on market
36
Properties for sale
171
Sold properties
$1.1m
Average sale price
$179.8m
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.

  • priceExpertbadge

    Consistently meets client expectations for property purchase price.

  • aotybadge

    Recognised for going above & beyond for their clients.

Peter's customer service awards

See what RateMyAgent awards Peter has won

  • Suburb WinnerOxley Park
  • Suburb WinnerWerrington
  • 5x Suburb WinnerOxley Park - 2026, 2025, 2024, 2021, 2020
  • 4x Suburb WinnerWerrington - 2026, 2025, 2020, 2019
  • 4x Suburb WinnerSt Marys - 2025, 2024, 2021, 2020
  • 3x National Top 100Australia - 2025, 2021, 2020

About Peter

Peter Diamantidis is the Founder and Selling Principal of Ray White United Group, which has grown to eight thriving office locations across St Marys, St Clair, Mount Druitt, Rooty Hill, Marsden Park, Glenwood, Arndell Park & Toongabbie. Working in real estate since the age of 15 Peter started in property management then moved into sales which has won an avalanche of awards ranking him in the top of 5 agents in NSW for a number of years and a high volume agent averaging 200 - 300 transaction every year. In 2021 - 2025 Peter was ranked in the top 5 real estate agents in NSW through realestate.com.au out of over 9,000 real estate agents. Peter’s exceptional attention to detail, dynamic energy and impressive negotiation skill sets him apart from his competitors with different ways to combat any situation nothing too small or too big. In 2017,2018,2019,2020,2021,2022,2023,2024,2025 Peter was ranked in the top 100 agents throughout Australia by REB which is an incredible result. With over 22 Years experience, Peter started in real estate at the age of 15 after leaving school. Starting from the bottom has given Peter a comprehensive understanding of every facet in relation to a property sales transaction and has allowed him to develop an ability to get a deal together and deliver for his clients in a way that few agents can. Peter is also a popular property commentator for National Nine News, Channel 7, Australian Property Magazine, The Daily Telegraph, Sydney Morning Herald, Your Property Magazine, The Australian and many more. “ Specialising in properties across Western Sydney & The Hills, with a strong passion in dealing with development blocks and off the plan developments, Peter’s market knowledge and dedication combined with the support of his team, ensure his clients are provided with an incredibly professional real estate experience every time.

Peter's reviews

  5  
Peter has 521 reviewsacross 44 different locations, showing 6.
Review Peter
Peter's qualities as told by our client reviews: supportive, responsive, dedicated, great negotiation, reliable, local expert, clear communication.
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Seller review
Excellent Agent would recommend highly
8 days ago
Excellent Agent would recommend highly

We found our selling experience with Peter and his team excellent, they were always a pleasure to deal with. Communication was beyond what we anticipated and we were kept informed constantly on all facets of our sale. Peter and his team were always professional to deal with and we felt like the selling of our home was a priority for them. We would recommend Peter and his team to anyone selling their home.

Seller review
very experienced and professional
21 days ago
very experienced and professional

Very reliable agent! Professional, patient and helpful throughout the whole house selling process. Highly recommend!

Seller review
Great result, Highly recommend Peter and his team.
about 1 month ago
Great result, Highly recommend Peter and his team.

We recently sold our house with the help of Peter and his team, and we couldn’t be happier with the experience. Peter and his team were professional, considerate, and worked incredibly hard to achieve the best possible result for us. Their communication throughout the entire process was excellent, we were always kept informed and felt supported every step of the way. We truly appreciated their dedication and would highly recommend them to anyone looking to buy or sell a home.

Seller review
Excellent communication and professionalism
about 1 month ago
Excellent communication and professionalism

I found Peter to be honest and transparent during a very challenging market. His constant communication truly set him apart. Peter provided me advice over the years with the property which was in my best interest not his. Rather than selling years ago he told me to hold the property for a few more years. His advice and guidance for a first time seller was professional and supportive. He maintained a high level of integrity throughout the process. I would recommend Peter and his team to other potential vendors. DB

Seller review
Trustworthy and professional
about 2 months ago
Trustworthy and professional

Peter and Patrick have been excellent throughout the sale of my house. Going above and beyond and guiding me through the process well. I couldn’t ask for more and appreciate their insight.

Show all 521 reviews
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Peter's properties

Peter has 36 properties for sale and sold 171 properties in the last 12 months, showing 4, sorted by most recent activity

SoldJul 7, 2026
$1,050,000
36 Pelsart Avenue
Penrith NSW 2750
3
1
1
House
SoldJul 7, 2026
For Sale
Brand New Luxury Townhouses | Move In Aug-Sep 2026
1-9/83 Canberra Street
Oxley Park NSW 2760
4
2
2
Townhouse
For Sale
ZONED R3 MEDIUM DENSITY
39 Kenny Ave
St Marys NSW 2760
3
1
2
House
Show all 207 properties
See Peter at work
Get a genuine perspective of what it’s like working with Peter.
Auctions
Quakers Hill
St Marys

Peter's sold properties

Peter has sold 171 properties in the past 12 months, showing 4.

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bedroom
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Property imageAddressBedroomsBathroomsCarparksProperty TypeClosing PriceDate Sold
36 Pelsart Avenue, Penrith, NSW, 2750
36 Pelsart Avenue
Penrith NSW 2750
3
1
1
House$1,050,000Jul 7, 2026
9 Le Marche Place, Plumpton, NSW, 2761
9 Le Marche Place
Plumpton NSW 2761
Land$810,000Jul 7, 2026
18 School House Road, Glenmore Park, NSW, 2745
18 School House Road
Glenmore Park NSW 2745
3
2
4
House$1,257,000Jul 1, 2026
4/5 Canberra Street, Oxley Park, NSW, 2760
4/5 Canberra Street
Oxley Park NSW 2760
3
2
1
Townhouse$890,000Jun 29, 2026

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