Sub-Floor Works Sydney – Restore Strength Beneath Your Home
Restore Stability. Stop Damage. Protect Your Home.
Your home’s stability begins below your feet. At Sydney House Levelling, we specialise in sub-floor repairs, timber replacement, and ventilation solutions that keep your home safe, dry, and structurally sound from the ground up.
Whether you’re noticing bouncy floors, sagging boards, or moisture smells under the house, our expert team will
assess, repair, and future-proof your sub-floor with honest advice and precision workmanship.
What Are Sub-Floor Works – And Why Do They Matter?
The sub-floor is the structural space between your home’s flooring and the ground. In many Sydney homes—especially older timber-framed houses—this space contains essential supports like joists, bearers, and stumps.
Over time, moisture, termites, poor drainage, or age can damage these components, putting your entire floor system at risk.
Our sub-floor works include:
- Joist and bearer replacement
- Stump and footing repairs
- Ventilation systems to prevent moisture build-up
- Drainage corrections around the sub-floor
- Inspection of floor movement and structural alignment
We ensure your home sits on a safe, stable, and well-ventilated foundation—critical for both comfort and long-term value.
House Levelling in Sydney
Backed by decades of hands-on experience, we’ve relevelled homes across the Greater Sydney region—from weatherboard cottages in the Inner West to modern slab-on-ground builds in the Hills District. Whether it’s a small adjustment or a full structural correction, our expert team is here to get your home back on solid ground.
Common Signs You Need Sub-Floor Repairs
If your sub-floor is deteriorating, you’ll often notice early warning signs inside your home, including:
- Floors that feel spongy, bouncy, or uneven
- Gaps between walls and skirting boards
- Musty smells or visible mould near the floor
- Timber rot, sagging floorboards, or creaking when walking
- Pest activity or signs of white ants under the home
These issues are especially common in Sydney’s older suburbs, where timber construction was standard and ventilation was limited. Our foundation assessments can pinpoint the cause before more serious structural issues develop.
Your Structural & Foundation Repair Specialists
We’re proud members of the Master Builders Association of NSW, HIA, QBE.
Our friendly team is here to give you honest advice, fast service, and long-term results.
Sub-Floor Works Often Go Hand-in-Hand With Structural Services
Many of the homes we service require a combination of foundational and sub-floor work to fully restore safety and alignment. Our team can help with:
- Re-Stumping – if stumps beneath the floor are failing or uneven
- House Relevelling – to adjust the structure after repairs
- Underpinning – for serious footing or soil movement
- Resin Injection – to stabilise soft soil beneath slabs
- Foundation Assessments – to diagnose the exact cause of floor movement
We’ll only recommend the services you genuinely need—and never push unnecessary work.
House Relevelling Specialists
Old or damaged timber stumps can shift over time, causing floors to dip and frames to twist. We remove failing stumps and install strong, modern replacements—ensuring your home is safely supported and structurally sound for decades to come.
Re-Stumping
When foundations are no longer strong enough to support your home, underpinning adds the reinforcement needed to stabilise and secure your property. We use engineered solutions to extend your footing into stable soil and stop further movement.
Underpinning
For lighter structures or concrete slabs, resin injection is a fast, non-invasive way to stabilise sunken ground. This method lifts and strengthens foundations by injecting an expanding resin that fills gaps under the home—ideal for driveways, patios, and parts of the house affected by soft or shifting soil.
Resin Injection
Foundation Repair Services
We inspect, repair, and upgrade the beams, bearers, and joists under your home to make sure everything’s structurally sound. If you’ve noticed bouncy or noisy floors, it might be time to look beneath the surface.
Sub-Floor Works
Ventilation
Moisture trapped under your home can lead to mould, timber decay, and structural problems. We install smart sub-floor ventilation systems that keep air moving and dampness out—helping protect your investment.
Not sure what’s causing movement in your home? We offer professional foundation inspections to identify the issue. Our team provides a clear, jargon-free report with real advice and no pressure.
Foundation Assessments
Why Choose Sydney House Levelling for Sub-Floor Works?
From Inner West cottages to Hills District post-war homes, we’ve seen it all—and we know how to fix it right.
- 20+ Years of experience in sub-floor and structural repair
- Trusted by Sydney homeowners and builders alike
- Fully licensed and insured
- Warranty-backed repairs and clear communication
- Familiar with Sydney’s common timber and soil conditions
- Honest, pressure-free advice
What Our Customers Have To Say
Our Process
Get in touch and we’ll book a convenient time to inspect your property. We’ll confirm everything you need to know before we arrive.
Step 1: Schedule On-Site Meeting
Step 2: Get a Detailed Assessment
We carry out a thorough inspection and provide a clear report with a fixed-price quote—no surprises, just expert advice.
Once approved, we lock in your job, organise materials, and handle any permits or prep. You’ll get full job details upfront.
Step 3: Schedule the Work
Our experienced team completes the work to the highest standard. After a final walkthrough, we leave you with a clean site and a written warranty.
Step 4: Job Done – With Warranty
Sub-Floor Works Sydney
Can I stay in my house during sub-floor work?
Yes, in most cases. We work from beneath the home, and disruption is minimal. For larger structural work, limited access may be needed.
Is poor ventilation really that serious?
Absolutely. Moisture build-up causes timber rot, mould, and pest issues. Ventilation systems help prevent these and are a cost-effective solution.
What causes sub-floor timber to rot?
Poor drainage, rising damp, and a lack of airflow are the usual culprits. Our team will address both the symptoms and the root causes.
What causes sub-floor timber to rot?
Poor drainage, rising damp, and a lack of airflow are the usual culprits. Our team will address both the symptoms and the root causes.
Can you inspect the sub-floor even if I don’t see damage?
Yes. We offer comprehensive foundation and sub-floor assessments to give you a full picture of your home’s structural health.
Ready to Relevel Your Home?
If your floors are creaking, bouncing, or just don’t feel right, your sub-floor might be sending you a message. At Sydney House Levelling, we provide expert sub-floor repairs and ventilation systems to help restore safety and comfort from the ground up.
Book your assessment today and let’s get your foundation—and your peace of mind—back on solid ground.