Owen Ona + Jagmeet Singh + Karan Randhawa + Mariel

Meet the team.

Canterbury real estate shaped by sharp strategy, local expertise, and a client-first way of working.

Diamond Realty

Experience the Diamond Standard

At Diamond Realty, success isn't just a goal - it's a standard. With over $300 million in property sales and more than 200 homes successfully sold, we have built a reputation as the go-to real estate experts for homeowners who demand real results.

Our team brings a unique blend of strategic innovation, market insight, and relentless execution to every listing. Whether it's a luxury estate, a family home, or a challenging property, we know how to position, promote, and sell - even when others can't.

More exposure. More buyers. More sold. That's the Diamond Realty difference.

Director & Principal | Diamond Realty

Owen Ona

Owen Ona is more than a top-tier real estate agent; he is a market leader, master negotiator, and trusted name across the Canterbury property landscape. As the high-performing Director of Diamond Realty, Owen has built a career on achieving the extraordinary: reviving stagnant listings, delivering record-breaking results, and unlocking hidden value in every home.

With a rich background that spans sales, customer service, and law, Owen brings a unique, strategic edge to every transaction. From the moment he entered the industry, he made an impact, winning the Rising Star Award in his first year and going on to deliver over $100 million in sales across Canterbury in record time.

What makes Owen truly exceptional is his people-first philosophy. Clients are not just transactions; they are relationships he invests in, long after the deal is done. His commitment to integrity, clarity, and client care has earned him a loyal following and countless referrals.

Whether he is working with a first-time seller or a seasoned investor, Owen's approach is both practical and visionary. He develops targeted, high-impact marketing strategies that maximize exposure, often without the need for big budgets, and connects with a powerful buyer network that spans local, international, and culturally diverse communities.

Real estate is more than sales; it is about shaping futures. I am here to deliver results, build wealth, and create long-term success for my clients.

propertymanagement@diamondrealty.co.nz

Licensed Real Estate Agent | Canterbury Specialist

Jagmeet Singh

Jagmeet Singh is an award-winning real estate consultant whose journey is as inspiring as the results he delivers. With over $110 million in property sales, his success reflects grit, growth, and unwavering commitment to his clients. Drawing on a diverse background in hospitality and real estate, Jagmeet combines business acumen with heartfelt client care in everything he does.

Driven by results, focused on you

Known for his tireless work ethic and personalised approach, Jagmeet is deeply client-focused and outcome-driven. He takes the time to truly understand each client's goals, providing honest advice and tailored strategies to achieve the best possible outcomes. Whether working with first-home buyers, investors, or sellers, he brings calm, clarity, and confidence to every step of the property journey. His deep local knowledge and strategic thinking have made him a trusted name in Canterbury real estate.

Beyond real estate

Jagmeet's passion extends far beyond property. As a lifelong learner and active community member, he is constantly looking for new ways to grow personally, professionally, and in service to others. A proud Canterbury local, his values of integrity, service, and commitment are evident in every client interaction. His warm, down-to-earth style ensures that every client feels supported, informed, and empowered from the first meeting to final settlement.

Your trusted property partner

If you are looking for a real estate professional who combines results-driven strategy with genuine care, Jagmeet Singh is ready to help you achieve your goals. With over $110M in property sales and a growing list of satisfied clients, he is not only building homes but also building trust and lasting relationships.

I believe that exceeding expectations begins with understanding people. My goal is to tailor every step of the process to meet your needs and deliver the best possible result.

propertymanagement@diamondrealty.co.nz

Sales Associate - Diamond Realty

Karan Randhawa

I am dedicated to helping clients navigate the complex world of buying and selling homes with ease and confidence. As a certified Real Estate Agent, I bring a wealth of knowledge and a keen eye for detail to every transaction, ensuring that my clients receive the highest level of service and expertise.

My approach is client-centered and results-driven. I take the time to understand each client's unique needs and goals, and I use my extensive market knowledge and negotiation skills to deliver exceptional results. Whether you are a first-time homebuyer, a seasoned investor, or looking to sell your property, I am committed to providing personalized support every step of the way.

Beyond my professional life, I am passionate about exploring local neighborhoods, community involvement, and interior design, which helps me stay connected to the communities I serve and bring a fresh perspective to my real estate practice.

I look forward to the opportunity to work with you and make your real estate dreams a reality. Feel free to contact me for a consultation.

Helping you buy or sell your home with confidence, clarity, and care. I am committed to delivering expert guidance, personalized support, and exceptional results every step of the way.

propertymanagement@diamondrealty.co.nz

Real Estate Salesperson | Canterbury

Mariel

Mariel's journey has always been centred around helping people. Before stepping into real estate, she built her career in nursing, where she developed strong skills in listening, empathy, patience, and staying calm under pressure. These qualities now shape the way she works with every client.

Alongside her professional career, Mariel successfully managed her own Airbnb business, giving her valuable hands-on experience in property presentation, guest experience, day-to-day management, and understanding what makes a property perform well as an investment.

Since entering the Canterbury real estate market, Mariel has quickly built a strong reputation and a growing track record of successful sales. Her early achievements were recognised when she received the Outstanding Newcomer Award, reflecting her strong work ethic, market knowledge, and commitment to delivering results.

What sets Mariel apart is her genuine, people-first approach. She believes trust, honesty, and clear communication are at the heart of every successful property journey. Her ability to connect with people from different backgrounds, combined with her practical property experience, allows her to confidently guide buyers, sellers, and investors.

Today, Mariel combines compassion, business experience, property knowledge, and a results-focused mindset to make every real estate journey smooth, personal, and successful.

Awards

Outstanding Performer | 2025 - 2026
Top Appraiser | 2026
Personal Best | 2026
Top Loan Market Referrer | 2025
Top Property Management Referrer | 2025
Top Appraiser | 2025
Personal Best | 2025
Nurture Cloud Champion Award | 2025

Latest Reviews

Mariel is not only a lovely person, but very hardworking and dedicated to providing the best service. I highly recommend getting in touch with her if you are looking to sell, you will not be disappointed!
Melissa G. (Vendor, 112 Briggs Road)

Mariel is one of a kind realtor! I made a decision to sell my house a couple of weeks prior to going to Europe and I came back to NZ with a sold house. She kept me updated throughout the whole process even when I was away.

Everything went very smoothly. Mariel was a wonderful agent to work with, she provided information and answers every step of the way. She was always available when needed, she was open and honest about the process and helped reduce the stress during the selling process.

Mariel gave a thorough explanation from the very beginning and answers every question I had. She knows her craft very well and genuinely cares about her clients. If you need to sell your house, MARIEL is the perfect person to do the job!
Hazel A. (Vendor, 8A Kruse Place)

Mariel was fantastic to work with - professional, organised, and genuinely attentive to her buyers throughout the entire campaign. She communicated the process and progress clearly at every stage, which made the experience smooth and stress-free.

Her strategic approach delivered a strong sales result in a short timeframe, and she even took the time to speak with the neighbors, ensuring everyone felt informed and respected. Highly recommended.
Aaron W. (Vendor, 39A Mackworth St)

Met Mariel when she was dropping pamphlets around our area. Spoke about selling but off market only. Within a week we had an offer on our house with only one buyer. She has been amazing and kept us up to date with everything. Couldn't be any happier. Would definitely recommend her to everyone.
Dale M. (Vendor, 233 Wainoni Road)

She is an amazing agent, easy to talk to and explains all the details about your questions. She responds quickly and clearly. She's easy to get along with. Would recommend and come back to if so.
Noel P. (Vendor, 3/200 Wainoni Road)

propertymanagement@diamondrealty.co.nz

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