Expert Witness

Leaky Buildings

GBC Group brings a fresh, current and professional approach to the building industry.


We take our extensive experience in the New Zealand construction sector, from design and project management to providing expert witness services in construction related claims. We apply our skills with cost effective, solution driven focus to give our clients confidence and results.

We are New Zealand trained and qualified with practical experience working as or for builders, project management, designers, Councils and Territorial Authorities and providing expert witness services.  Our clients range from residential home owners to multi unit body corporates. We take pride in delivering on time and covering all aspects of construction related disciplines. 

If you would like to discuss your project, investment or resolve a construction dispute please contact us at

Our business hours are Monday to Friday, 8:30am to 5pm. During these times we can be reached via mobile:

Andrew Gray: 021 076 5801