Underpinning is the process of strengthening, stabilising, or deepening existing foundations to repair cracks, gaps, and structural movement. Professional house underpinning in Melbourne ensures your home has a strong, stable, and compliant foundation, protecting it from further settlement and long-term structural damage.
Soil is excavated in sections beneath foundations and replaced with concrete to increase load-bearing capacity.
Engineered steel piles are screwed into stable ground, providing reliable, low-vibration foundation support for existing structures.
Small-diameter piles are installed to transfer structural loads deeper into stable soil, ideal for restricted access sites.
Reinforced concrete beams are installed beneath footings, distributing structural loads onto a new, stronger concrete base.
We engage a qualified structural engineer to assess your home and prepare detailed plans.
A formal building contract is completed, and we apply for the required council permits.
We carefully support the home with heavy-duty jacks before commencing excavation according to engineering specifications.
Underpinning pits are excavated in stages. A building inspector checks and approves the work before concrete placement.
High-quality concrete is poured in stages, allowing proper curing time to achieve maximum strength.
Foundations are gradually lifted and supported to restore the structural level and stability.
After curing, we remove temporary supports, backfill soil, and complete a thorough clean-up.
The time required to underpin a house typically ranges from 1 to 8 weeks, depending on the size of the property, extent of foundation damage, number of pins needed, and soil conditions. Smaller residential underpinning projects may take a couple of weeks, while larger or structurally complex homes can take longer.
Your house may need underpinning if you notice cracks on the brick wall from the outside perimeter of the home, cracked walls inside, or uneven floors. These signs often indicate foundation movement. A professional structural engineer will be called for an inspection to confirm how many underpins are required under the existing foundation to stabilise your home’s foundations.
In most cases, you do not need to move out during underpinning work. Typically, underpinning is performed from the exterior perimeter of the house. This allows you to carry on with your daily life inside with minimal disruption.
Yes, all underpinning projects require council approval because they involve structural foundation repairs. Building permits, engineering plans and compliance with Australian Standards are typically required.
As a registered builder with the BPC of Victoria, Spot On Reblocking handles all approvals and documentation to ensure that your underpinning work complies with all local regulations.
Underpinning involves strengthening and stabilising a home’s existing foundation by extending it deeper under the existing foundation according to the depths stated by engineering plans.
The process includes structural engineering assessment, staged excavation beneath the existing footing, propping the existing foundation/subfloor, building surveyor inspections before pouring concrete in two stages, and vibrating it into place to prevent further subsidence. Upon completion, a certificate is provided once the final inspection is conducted.
