About this business
Geotech Built specialises in underpinning, restumping, subfloor and foundation repairs, delivering high-quality subfloor work and structural solutions across New South Wales. The company combines over 30 years and three generations of experience with innovative, tried-and-tested methods, modern equipment, and a licensed builder personally overseeing all works to provide cost-effective, reliable service.
Service areas
Servicing NSW and surrounding locations.
- Sydney
- Wollongong
- Central Coast
- New South Wales
See what local homeowners are saying
Tony
19 Feb 2026John and his crew were straight forward and professional. Access to the subfloor was a crawl space. The work was carried out with professionalism and knowledge. My many questions were answered with ph...
Read moreJohn and his crew were straight forward and professional. Access to the subfloor was a crawl space. The work was carried out with professionalism and knowledge. My many questions were answered with photos and videos supplied along the way. I would highly recommend Geotech Built to rectify any foundation issues.
Claire Gibson
29 July 2024We engaged John and his team to restump our 1912 cottage, replacing 40+ failed brick piers with new steel piers. John's communication was excellent from first visit, right throughout the project. We m...
Read moreWe engaged John and his team to restump our 1912 cottage, replacing 40+ failed brick piers with new steel piers. John's communication was excellent from first visit, right throughout the project. We met with a few builders, but John was the only one that demonstrated real expertise and took the time to explain various options within our budget. Throughout the project, he shared regular updates with a clear, transparent approach, and is passionate about delivering a great end result. The team was professional and punctual, making the entire process smooth and stress-free. I highly recommend John and his Geotech team!
Lianne Keeghan
31 Oct 2024Absolutely amazing. We needed re stumping under our house, John was very professional, explained everything, gave us clear understanding of work that needed to be done, explained all processes. The te...
Read moreAbsolutely amazing. We needed re stumping under our house, John was very professional, explained everything, gave us clear understanding of work that needed to be done, explained all processes. The team were exceptional, they arrived on time, we were really happy to hear them laughing and singing while doing their work as it told us they were happy and enjoying their job, as everyone knows if your happy in your job your work is great, and their work is fantastic. John and his team were professional, respectful and helpful. Highly recommend Geotech Build.
John Tran
19 Nov 2024John and the team at Geotech Built did a great job with significant subfloor works to our 1930s home which had quite a number of subsided brick piers, as well as bearers that had some previous termite...
Read moreJohn and the team at Geotech Built did a great job with significant subfloor works to our 1930s home which had quite a number of subsided brick piers, as well as bearers that had some previous termite damage - resulting in a few rooms with sloping and uneven floors. The team worked quite hard in a very tight crawl space to replace all the damaged piers and bearers and finally jack up the floors, levelling it all out to provide a strong foundation. He made sure we had a clear understanding of the process and any impacts the works would have, giving us confidence throughout. Would strongly recommend GeoTech as your best option for any restumping works.
D Mak
16 May 2024GeoTech Built is a reputable building company specialising in underpinning and foundational work. When I mentioned the issue we were enquiring about, John was able to quickly and concisely tell me the...
Read moreGeoTech Built is a reputable building company specialising in underpinning and foundational work. When I mentioned the issue we were enquiring about, John was able to quickly and concisely tell me the problem and how it should be fixed. He also gave me a range of quotes depending on our budget. GeoTech are professionals who are highly experienced in this space.
Manish Gupta
27 Feb 2024John and team did a great job replacing subfloor pillars for our old house with subsided brick piers 2 years ago. John attended to the flooring level works himself and clearly understands his work wel...
Read moreJohn and team did a great job replacing subfloor pillars for our old house with subsided brick piers 2 years ago. John attended to the flooring level works himself and clearly understands his work well and takes pride in the outcome. I consulted several companies prior to choosing John as I felt the most comfortable and wasn’t wrong in doing so, given the works were done a while ago now and still can’t fault anything.







