Peter Diamantidis

Peter Diamantidis

Director / Licensee / Principal at Ray White United Group | St Marys
  •   5   (527 reviews)

Peter's sales performance at a glance

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

49
Reviews
26
Median days on market
32
Properties for sale
168
Sold properties
$1m
Average sale price
$174.8m
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 527 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
Top tier, professional and a great result
3 days ago
Top tier, professional and a great result

I’ve now used Peter and his team to sell two houses for me and I can confidently say he is the absolute best agent around. He is exceptionally professional and managed to secure a fantastic price for us even in a tough market. I wouldn't hesitate to recommend peter and his team to anyone looking to buy or sell.

Seller review
Outstanding
7 days ago
Outstanding

Thank you Peter and your team for going far and beyond with your service, outcome and excellent communication

Seller review
Excellent communication and commitment to achieving the best outcome for clients
24 days ago
Excellent communication and commitment to achieving the best outcome for clients

I can't say enough about how comfortable Peter made me feel from the first time I met him to discuss the potential sale of our property. Every interaction from that point on has been a pleasure. You gave us a realistic outcome and even made sure we achieved it, what more can a client ask!!! If you are looking to sell then Peter is your guy no questions asked!

Seller review
Demonstrated exceptional professionalism, integrity and commitment.
26 days ago
Demonstrated exceptional professionalism, integrity and commitment.

I am pleased to provide this reference for Peter Diamantidis following the successful sale of my property. From our first meeting through to settlement, Peter demonstrated exceptional professionalism, integrity and commitment. They kept me informed throughout every stage of the sales process, provided honest advice, and ensured I understood my options so I could make informed decisions. The result they achieved exceeded my expectations. Despite a challenging market with cautious buyers and increased competition, Peter implemented a well-planned marketing strategy, generated strong buyer interest and negotiated skillfully to secure multiple interested parties and an outstanding sale price. Their market knowledge, persistence and ability to adapt throughout the campaign were instrumental in achieving such an excellent outcome. What impressed me most was their honesty and genuine commitment to achieving the best possible result. They never made unrealistic promises or applied pressure. Instead, they communicated openly, provided sound advice and worked tirelessly on my behalf. I always felt confident they had my best interests at heart. Selling a property can be stressful, but Peter made the entire experience smooth and straightforward. Their responsiveness, attention to detail and professionalism were outstanding, and they consistently delivered on every commitment. I have no hesitation in recommending Peter to anyone buying or selling property. They are an exceptional real estate professional who combines expertise, integrity and outstanding customer service with the ability to achieve excellent results. I would gladly engage their services again and sincerely thank them for making the sale such a positive and successful experience.

Seller review
    Sold Our Home with Confidence and tight timeline
28 days ago
Sold Our Home with Confidence and tight timeline

Selling our townhouse within such a tight timeframe felt like an impossible task, but Peter and his team made it happen. From the very beginning, they gave us confidence, communicated clearly, and worked tirelessly to ensure everything stayed on track. What impressed us the most was how they seemed to move mountains to get our property sold in under three weeks. Every challenge that came up was handled professionally. Thank you for making the sale of our townhouse such a positive experience, especially given our very tight timeline. We truly appreciate everything you did for our family.

Seller review
Fantastic agent and team.
about 1 month ago
Fantastic agent and team.

Peter and his team at ray white were fantastic to work with from the get go. They are incredibly knowledgeable and hard working and strived to get the best result possible for us. We are super happy with the whole process and highly recommend anyone looking to sell their property.

Show all 527 reviews
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Peter's properties

Peter has 32 properties for sale and sold 168 properties in the last 12 months, showing 4, sorted by most recent activity

SoldAug 21, 2026
SoldAug 21, 2026
$600,000
102/1 Markham Avenue
Penrith NSW 2750
2
2
1
Unit
For Sale
JUST LISTED!
14/22 Hall Street
St Marys NSW 2760
3
1
2
Townhouse
SoldAug 20, 2026
$990,000
21 Jirang Place
Glenmore Park NSW 2745
4
1
1
House
Show all 200 properties

Peter's sold properties

Peter has sold 168 properties in the past 12 months, showing 4.

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Property imageAddressBedroomsBathroomsCarparksProperty TypeClosing PriceDate Sold
8 Le Marche Place, Plumpton, NSW, 2761
8 Le Marche Place
Plumpton NSW 2761
Land$824,040Aug 21, 2026
102/1 Markham Avenue, Penrith, NSW, 2750
102/1 Markham Avenue
Penrith NSW 2750
2
2
1
Unit$600,000Aug 21, 2026
21 Jirang Place, Glenmore Park, NSW, 2745
21 Jirang Place
Glenmore Park NSW 2745
4
1
1
House$990,000Aug 20, 2026
28 Jackaranda Road, North St Marys, NSW, 2760
28 Jackaranda Road
North St Marys NSW 2760
4
2
House$1,240,000Aug 14, 2026

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