Melbourne's Trusted Underpinning Contractors — Built on Solid Foundations
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Underpinning & Foundation Specialists Across Melbourne, VIC
Local, family owned and run business – deal with the real deal, do the work! No salespeople!
Our Mission
To deliver reliable foundation repair solutions with honesty, quality, and care.
Our Vision
To be Melbourne's trusted choice for lasting underpinning and structural stability.
- Our Services
Our Underpinning & Foundation Services
Underpinning a House
The soil below a house can move, settle and erode; this will put a house's structure at risk. Underpinning is our main service; underpinning a house strengthens and stabilises the existing foundations.We use proven and approved methods by engineers which comply with all applicable Australian building codes.
Screw Piling
The modern foundation method known as screw piling is a minimally invasive system used in situations with challenging soil conditions such as congested access, or when conventional excavations are impossible to perform. Using precision installation equipment, our highly trained staff installs helical screw piles into stable soil layers to create fast and reliable footing for both residential and commercial buildings.
Reblocking and Underpinning
Reblocking and underpinning typically work together. If you need to replace timber stumps that are rotting, shifting or have deteriorated in any way, we’ll provide new concrete or steel stumps to bring your floors level again and give your home back the overall structural stability. Whether you have a weatherboard home or a brand new modern design, we will find a solution suitable for your property and will discuss options that are tailored to suit your particular type of house.
Cracked Wall Repairs
Foundation shifting often causes wall cracks. Harman Contracting has experience with professional wall crack repairs in addition to finishing the exterior of the structure. They will evaluate all potential causes of the crack prior to performing any repair work. After having identified all potential reasons for the cracking in the wall, they will stabilize the foundation issue causing it, and complete the repair after ensuring that it is safe to do so.
Underpinning and Restumping
Our underpinning/restumping work includes all forms of masonry and timber frame foundations. A professional will inspect the current condition of your existing timber stumps. If necessary, we will dig up the area around the stump and put or install a new stump or concrete piers under your house in order to ensure it's level again. All aspects of the work completed will be performed only by qualified individuals. Each contractor will provide you with the required compliance documentation for the work they do on your home.
- WHY CHOOSE US
Why Melbourne Homeowners Trust Harman Contracting
- OUR PROCESS
Underpinning Contractors Across Melbourne & Victoria
Harman Contracting provides underpinning and foundations services across all Melbourne metro suburbs and regional Victoria, including:
Inner Melbourne & CBD surrounds
Eastern Suburbs
Western Suburbs
Northern Suburbs
Southern Suburbs & Mornington Peninsula
Regional Victoria
From screw piling to reblocking/Ballarat to cracked wall repairs Frankston, all your underpinning needs will be fulfilled.
Warning Signs Your Home Needs Underpinning
Not sure if you need underpinning a house assessment? Look out for these key warning signs:
If you notice any of these issues, contact our underpinning and foundations team immediately. Early intervention significantly reduces the cost of repairs and prevents further structural damage.
- Cracks in walls — especially diagonal or stair-step cracks in brickwork
- Doors and windows sticking or no longer closing properly
- Uneven or sloping floors
- Gaps between walls and ceilings or cornices
- Visible deterioration of stumps (crumbling, leaning, rotting)
- Sagging or springy floors indicating failed stumps
- Historical flooding or drought periods affecting your soil
Frequently Asked Questions About Underpinning
Underpinning a house is the process of strengthening or deepening the existing foundation to restore stability and prevent further movement. It is typically required when soil conditions have changed, the original foundation was inadequate, or the building load has increased.
Reblocking and underpinning are related but distinct services. Reblocking refers specifically to replacing deteriorated timber stumps in older homes, while underpinning addresses the broader foundation and footing structure. Many properties require both reblocking and underpinning solutions at the same time.
Screw piling is ideal for sites with difficult access, reactive or soft soils, or where minimal excavation is required. It is faster to install than traditional methods and suitable for both residential and commercial foundations.
Surface cracked wall repairs alone will not resolve the underlying issue if foundation movement is the cause. Harman Contracting always investigates the root cause of cracks in walls to determine whether underpinning and foundations work is required before carrying out any cosmetic repairs.
The cost of underpinning and restumping varies depending on the size of the property, soil conditions, access, and the extent of damage. We provide free on-site inspections and detailed quotes — contact our underpinning contractors for an accurate assessment.
