Underpinning in Shellharbour
- Licensed & Insured
- Family business for over 168 years
- Affordable, Quality Work
Request a Call Back
Contact Us
Thank you for contacting Knobel Builders.
We will get back to you as soon as possible.
Oops, there was an error sending your message.
Please try again later.
Shellharbour Underpinning
If you’ve noticed cracks in your walls or uneven floors in your Shellharbour property, it might be time to look into professional underpinning. At Knobel Builders, we offer reliable underpinning services designed to stabilise and support your home’s foundation. With years of experience working on homes throughout the Illawarra, we know how to identify structural movement and deliver practical, long-lasting solutions.
Our team is fully licensed and brings a hands-on, cost-effective approach to every job. We'll take the time to assess your property properly and offer honest advice about what’s needed. Local customers choose us because we communicate clearly, work efficiently and always follow through on our commitments. Whether it’s a minor shift or a more serious foundation issue, we’re here to help.
For peace of mind and a free quote, call us today on 0417 286 971.
Experienced Foundation Support Services
Underpinning helps restore stability to homes that have experienced shifting soil, poor initial construction, or long-term wear and tear. In Shellharbour, where many properties sit on mixed soil types, movement can become an issue over time. We use proven methods to reinforce your foundations, ensuring your home remains safe and level.
From detailed site assessments to tailored repair plans, our process is thorough and efficient. We use trusted materials, up-to-date techniques and make sure every step is clearly explained before we begin. What sets us apart is our reliability—we show up on time, keep the site tidy and make sure the job’s done right. If you’re in Shellharbour and concerned about your home’s foundation, we’re here to guide you through the process.
You’ll know exactly what to expect and who to talk to—start to finish.
Why Choose Us?
We’ve worked with Shellharbour homeowners facing all kinds of foundation issues, from minor cracks to significant structural concerns. What they value most is our practical advice, upfront pricing and consistent results.
As a fully licensed builder, we bring structural know-how and attention to detail to every job. We don’t just fix problems—we help prevent future ones too. Our approach is friendly, professional and focused on what works best for your home. Reach out today to find out how we can help.
Location Resources
Neighbouring Areas:
- Warilla, 2528
- Helensburgh, 2508
- Albion Park, 2527
- Dapto, 2530
- Gerringong, 2533
Local Resources:
Frequently Asked Questions
What is underpinning in construction?
Underpinning is a construction process used to strengthen and stabilise the foundations of an existing structure. It’s typically necessary when a building’s original foundations are no longer strong enough to support it due to soil movement, water damage, or changes in load.
Underpinning methods vary depending on the cause and severity of the problem and may include mass concrete underpinning, screw piles, or beam and base techniques. The goal is to transfer the structural load to a more stable soil layer or distribute it more evenly to prevent further subsidence or damage.
How do I know if my house needs underpinning?
Signs that a house may need underpinning include visible cracks in walls (especially diagonal or stair-step cracks), uneven floors, doors or windows that no longer close properly, or gaps between walls and ceilings. These symptoms often point to foundation movement, which may be caused by shifting soil, drainage issues, or tree roots.
A structural engineer should assess the severity and determine whether underpinning is the best solution. Early detection can help prevent further structural damage and reduce the overall cost of repairs.
How long does underpinning take to complete?
The duration of an underpinning project depends on factors like the size of the building, the severity of foundation issues, and the method used. For smaller residential properties, the process may take one to three weeks. More extensive or complex jobs involving deep foundations, poor access, or multiple sections may take several weeks or even a couple of months. Weather conditions, soil type, and council approval processes can also impact the timeline. A detailed site inspection and quote will usually include a project timeframe.
