Managing Director

MATTHEW HORNCASTLE

On a daily basis, Matthew oversees Williams Corporation’s operations, ensuring projects run smoothly and align with the company’s vision. With over a decade of experience as a qualified builder, he brings practical know-how and a hands-on approach to every development. He also oversees Williams Real Estate and the company’s other subsidiaries, helping the group offer a full-circle property experience that builds strong, lasting relationships with clients. Matthew’s energy and enthusiasm reflect a genuine passion for creating homes and communities that enhance the liveability of New Zealand.

Managing Director

CARL DA COSTA

Carl brings proven industry expertise, strong leadership, and a client-first approach to deliver exceptional results at Williams Real Estate. With over 15 years in real estate sales, plus extensive experience as a property investor, business owner, entrepreneur, and public speaker, Carl offers a wealth of knowledge and insight. He is passionate about helping others achieve personal and financial freedom through genuine support, encouragement, and expert guidance. Carl’s enthusiasm and expertise make him a trusted partner in helping you achieve your goals and property aspirations.

Licensed Salesperson

KIRSTY VAN DER MERWE

Kirsty has devoted her career to the property industry with one clear goal: to provide a premium real estate experience founded on trust, exceptional service, and outstanding results. She makes every step of the property journey seamless and stress-free. Whether you’re buying your first home or growing your investment portfolio, Kirsty ensures your property goals are met with confidence and clarity. Partner with her today and unlock the opportunities waiting for you in the property market.

Agent Licensee

KEITH RONALD WARD

​Keith brings extensive real estate expertise, regulatory knowledge, and a strong commitment to compliance in his role as Agent Licensee and AML Officer at Williams Real Estate. Well-respected in the New Zealand property industry, he ensures that all transactions meet the highest professional and legal standards. With a wealth of experience in agency leadership and anti–money laundering processes, Keith is dedicated to protecting clients’ interests while upholding industry integrity. His thorough, principled approach and deep understanding of real estate make him an essential leader within the Williams Real Estate team.

Marketing Manager

DEON CORBETT

Deon draws on his creativity, attention to detail, and deep understanding of real estate marketing to bring authenticity and impact to his role as Marketing Manager. He has developed a practical, results-driven approach to campaign strategy and execution, ensuring every project connects with the right audience. This, combined with his passion for property and expertise in digital and traditional marketing channels, allows Deon to deliver engaging content and high-impact campaigns. He’s committed to producing tailored marketing solutions that create strong results for every project he undertakes.

Senior Admin Assistant

RIVKA PAIGE ISRAEL

Rivka brings exceptional organisational skills, a proactive approach, and a dedication to excellence in her role as Executive Assistant to Managing Director Matthew Horncastle. She currently oversees Williams Real Estate’s sales and operations, ensuring seamless processes and outstanding results. With a strong background in administration and team coordination, Rivka thrives on creating efficiency, supporting growth, and fostering a positive work environment. Her commitment to detail and passion for helping others succeed make her an invaluable part of the Williams Real Estate team.​​

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