- Dianne Sullivan

About Dianne Sullivan
Dianne thrives on helping others, problem-solving and thinking outside the square.
With a rich and diverse background in business management, sales, marketing, and customer service, she brings a wealth of knowledge, and a broad skill set to real estate.
Having worked across a range of sectors, including finance, education, health and disability, business/retail, and hospitality—this experience adds real value to the service she provides.
Dianne is an award-winning agent who has built a strong reputation as an agent who goes above and beyond for her clients. Her focus is always on delivering an exceptional and personalised experience throughout every step of the property journey. Understanding that no two clients or properties are the same, Dianne tailors each experience to suit the individual needs of her clients.
Known for her enthusiasm, professionalism, and down-to-earth nature, Dianne operates with honesty, integrity, and a genuine commitment to putting her clients first.
She keeps you fully informed throughout the process and works tirelessly to achieve the best possible result. With strong negotiation skills and a “client-first” mindset, Dianne’s ultimate goal is your satisfaction and success.
When she’s not helping clients, Dianne enjoys the Northland lifestyle—walking her dog, fishing, and spending quality time in her community and with her family and friends.
Thinking of buying or selling? Get in touch—I’d love to help you achieve your real estate goals.
2024-2025 Awards
• 1st Equal Harcourts Client Experience Individual Award, Northern Region for 2024/2025
• 2nd Equal Harcourts Client Experience Individual New Zealand National Award for 2024/2025
• Number 2 Individual Salesperson Harcourts Whangarei 2024/2025
• Number 4 Residential Salesperson Harcourts Whangarei 2024/2025
• Individual Recognition, Silver Sales Status Q4 (January - March 2025)
•4th Quarter National Awards Top 100 January - Number 73
Top skills
Negotiation
Marketing
Communication
Customer service
Knowledge
Experience
Advertising
Practice management
Patience
Top suburbs
Parua Bay
Onerahi
Tamaterau
All Listings by Dianne Sullivan
- For sale
- Sold
- For lease
Open Home
Video available

Asking Price $1,180,000
80 Campbell Road, Parua Bay5
2
11

Open Home

Price by Negotiation
3/6 Lilian Street, Te Kamo2
1
2

Open Home
Video available

Deadline 10th Dec 2025 at 12pm (unless sold prior)
833 Whangarei Heads Road, Parua Bay4
3
6


Asking Price $985,000
41 Stuart Road, Whangārei Heads2
2
3

Open Home

Asking Price $610,000
18 Princes Street, Kensington5
2
4


Price by Negotiation
9 Weir Crescent, Onerahi2
1
4

Open Home

Price by Negotiation
29 Tahunatapu Road, Parua Bay3
2
4

Testimonials
From the start Dianne believed in us and understood what we wanted. Our dream was to move back to Whangarei Heads. Dianne found our new home in Mcleods Bay, and she successfully listed and sold our Onerahi house within 2 weeks. Dianne genuinely respects and cares for her clients and that shows through her work ethic. Our experience was smooth sailing, and we are forever grateful for what Dianne has done for us.
Vendor - Cartwright Road-
We cannot recommend Dianne enough! She was helpful and knowledgeable, and we felt like we were in the safest hands possible throughout the sale of our home. As well as her knowledge and expertise, Dianne is a genuinely lovely person, who wants the best results for her clients, and works hard to make that happen.
Vendors - 54 View Road-
Recommend 150%
Dianne was absolutely amazing throughout the process from 1st meeting to sale. I put my trust in Dianne to market the house in a way that she felt would reach the best outcome. It was on the market for 32 days and sold at auction for an amount we were happy with. Her expertise and professionalism were of high standard. Her contact and communication regular. She updated us every step of the way and prepared us a step ahead of too. If you are looking for someone with expertise, efficiency and integrity, I absolutely recommend Dianne 150%. I will definitely use her services for any sales or purchases in the future.
Vendor - Douglas Street-
Dianne provided an excellent service, as a local herself she has exceptional knowledge of the area, keeping us updated with the current market stats and feedback from open homes throughout the whole process. We worked really well together, she built a great relationship and knowledge of the property Would highly recommend to anyone wanting to either buy or sell.
Vendor - 206 Te Rongo Road -

Get a free, no obligation appraisal from Dianne Sullivan today