Specialists in underpinning, restumping and
all subfloor remedial services


Geotech Built creates a solid foundation for your property by providing the highest quality sub floor work throughout NSW.

As an industry leader our commitment is always to deliver exceptional services to our clients. Specialising in underpinning, restumping and subfloor repairs, Geotech Built successfully maintains a reputation for delivering quality, reliable and sound services to clients all over New South Wales, with a licensed builder that personally oversee all works.

"Providing a Solid Foundation"

Underpinning and Foundation Repairs in Sydney

Underpinning and Foundation Repairs

We are known for our innovative and highly unique foundation underpinning and strengthening of your existing structure.

Restumping/Pier Replacement In Sydney

Restumping/Pier Replacement

Many Australian subfloor building structures consist of a brick or timber stump construction and they can deteriorate over time. 

Floor Levelling Services in Sydney Australia

Floor Levelling

Foundation issues can impact your internal floor levels. You can trust Geotech Built to diagnose your problem and apply a cost-effective, high-quality solution.

Cracked-Brick wall

Cracked Brickwork/Walls

Are you seeing external cracks on your brickwork or internal walls? Are your door frames and windows jamming up. 

Subfloor Repairs in Sydney Australia

Subfloor Repairs

Geotech Built specialises in all sub floor repair work.

Subfloor Vent

Subfloor Ventilation

A major problem with homes in Sydney and many parts of Australia is moisture and dampness around the foundation and sub floor area caused by inadequate subfloor ventilation and poor drainage. 

Subfloor Extension/Excavation taking place in Sydney

Subfloor Extension/Excavation

In many circumstances there is a need or desire for subfloor excavation and extensions.

Mould Removal Services located in Sydney

Rising Damp/Mould Removal

This is a common problem endangering your foundation and the health of your family and pets.

Retaining Wall Contractors in Sydney

Retaining Walls/Drainage Solutions

New to the field of retaining walls and drainage solutions are GWS or Gravity Wall Systems, perfect for Australia. 

Bathroom Renovations contractors in Sydney Australia

Bathroom Renovations

Geotech Built have a team of specialists that provide entire bathroom renovations. 

Geotech Built



John was very professional and spent a long time with me inspecting and discussing various options. His tender clearly described and quoted each proposal and then he accommodated my request for a mix of them. They started on time and John explained the work throughout. They cleaned up when they had finished. I have no hesitation in recommending this company.

Lesley Durbin from Seven Hills, NSW
RestumpingSeptember 13, 2017


 I would highly recommend John! Very satisfied with the service, excellent with the job. I hired him again and he is doing something for me today.

Maree Hammerton from Camden, NSW
Restumping March 22, 2017


The job is now complete and Geotech Built did a great job.

Mario Simonetti from Watanobbi, NSW
Underpinning January 11, 2017


Specialist In Foundations & Footings

With over 30 years of industry experience our company offers a permanent solution that has been trialled and used by 1000’s of customers throughout Sydney and the greater NSW regions

Providing The Highest Quality

We maintain a reputation for delivering quality and reliable subfloor, underpinning, piering and restumping services to our clients throughout all suburbs of Sydney thanks to our highly experienced, licensed, trained and accredited staff

Integrity and Diligence Throughout

We provide quality underpinning, piering and subfloor solutions with the utmost integrity and diligence. We pride ourselves confidently in being market leaders in our industry throughout all areas of Sydney, NSW.

Innovative Approach

Our approach to inspecting your underpinning, pier issues, restumping and floor levelling concerns is carried out via our licensed and experienced team. Our equipment is modern and state of the art. Geotech Built utilises computer assisted laser levelling machinery to accurately identify the extent of your foundation movements.

Tried & Tested

Geotech Built will carry out a thorough inspection of your property to ensure you are provided with a fixed price building agreement. We are a builder you can trust.


All our works and services carry with them the correct full insurances and liabilities.

Like what you See?

Drop us a line today for a quote!