Greg de Marigny

Greg de Marigny

Sales & Marketing Consultant at Harcourts Cooper & Co - Devonport
  •   4.9   (18 reviews)

About Greg

With 33 years of calling Waiheke my family home, I bring a wealth of love and knowledge of our island to my real estate practice. As a dedicated professional with a fresh perspective, I am passionate about developing practical and creative solutions in a fast-moving commercial environment. My commitment to service delivery is unwavering, and I communicate with clarity and negotiate with integrity to achieve outstanding results for my clients. Whether you are a vendor on the move, an investor seeking a quality agent, or a new entrant to the Waiheke housing market, I am here to help. With an abundance of energy and a passion for success, I am committed to listening to your needs and working with you to achieve your goals. I pride myself on my ability to understand the unique needs of each client and provide personalised, attentive service. As part of our commitment to excellence, I offer an in-house photography service to present your property in the best possible light. I am dedicated to ensuring that your property stands out in the market and attracts the attention of potential buyers. When not in the office, I enjoy spending time with family and friends, as well as staying abreast of global issues and macroeconomics. I am an avid sailor, cyclist, and martial artist, and I believe that staying active and engaged is essential to maintaining a positive and productive outlook. If you are looking for a knowledgeable and committed real estate professional on Waiheke Island, look no further. I am eager to assist you with all of your real estate needs. Please don't hesitate to contact me today to schedule a consultation and take the first step toward achieving your real estate goals.

Greg's reviews

  4.9  
Greg has 18 reviewsacross 6 different locations, showing 6.
Review Greg
24 days ago
Their communication was great-always proactive, honest, and focused on results.

I can’t speak highly enough of our experience with Greg and Karen. From the very beginning, they brought professionalism, clarity, and genuine care to the entire selling process. Their communication was exceptional—always proactive, always honest, and always focused on achieving the best outcome for us. Their market knowledge, strategy, and attention to detail made a huge difference, and we felt supported every step of the way. Selling a home can be stressful, but Greg and Karen made it smooth, efficient, and surprisingly enjoyable. We are incredibly grateful for their hard work and would recommend them without hesitation.

about 1 month ago
Supportive, professional and good communicator

We were very happy to work with Greg, he and Karen make a great team. His photography displayed our property extremely well and gave an excellent and accurate impression of the land and buildings. We enjoyed dealing with Greg and welcomed his input which was especially appreciated when we needed help with decision making. Both he and Karen have a very open and sensitive style of dealing with us and they did not put us under any “selling” pressure.

3 months ago
Friendly, professional and knowledgeable

Greg De Marigny and Karen McMahon were both friendly, professional and easy to communicate with and also very knowledgeable of the real estate market on Waiheke. We were able to have a few laughs with them during the selling process which made the experience a lot more relaxed and easy going. They were both realistic regarding the house selling process and gave us good insight into what to expect during the sale of our house. They took a lot of the stress of selling a house off our shoulders and we knew we were in good hands with them both. We would definitely recommend these two agents to anyone wanting to sell or buy real estate. They work very well as a team. Cheers Greg & Karen! :)

6 months ago
House sale with Greg

Greg made a great job selling our house on Waiheke in 5 weeks. We found Greg excellent and easy to work with - listened closely, got back to us promptly, kept us up to date. Technically Greg took some professional photos of our house including drone shots and presented it superbly for the marketplace. We enjoyed working with Greg and would thoroughly recommend for managing a house sale (and i suspect purchase)

6 months ago
Integrity and Genuiine Care shone through

Working with Greg and Karen on the sale was an absolute pleasure from start to finish. Their professionalism, clear communication, and genuine care made what could have been a stressful process feel smooth and well managed. Greg was always available to answer questions, provide honest advice, and guide us through each step with confidence and integrity. Both Greg and Karen went above and beyond to ensure the best outcome, and their local knowledge and experience really shone through. I’m truly grateful for their support and couldn’t have asked for a better team to work with. I highly recommend Greg and Karen to anyone looking for reliable, personable, and results driven real estate professionals. Zion

about 1 year ago
HIGHLY RECOMMENDED

Greg and Karen were outstanding estate agents for me, especially as I was selling my home of over 45 years, which has been so emotional for me, but it was time for me to move on. They were so professional and very knowledgeable about the current market and worked very hard to get me the best price possible for my property, but also were always very thoughtful and considerate of me and always went the extra mile to fit in with me. I would highly recommend Greg and Karen to sell your property.

Show all 18 reviews

Greg's properties

Greg has 5 properties for sale and sold 12 properties in the last 12 months, showing 4, sorted by most recent activity

SoldApr 23, 2026
Price not available
71 Trig Hill Rd
Onetangi Auckland
2
1
House
SoldApr 16, 2026
Price not available
10/118 Ocean View Road
Oneroa Auckland
1
1
Apartment
SoldMar 30, 2026
Price not available
58 Onetangi Road
Waiheke Island Auckland
3
3
2
Rural
SoldMar 27, 2026
Price not available
47 Natzka Rd
Ostend Auckland
2
2
1
House
Show all 17 properties
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