Trusted Underpinning
Across New South Wales
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How Underpinning Works in New South Wales
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Underpinning Pricing in New South Wales
| Service | Min | Max | Avg |
|---|---|---|---|
Foundation Crack Repair Repairs small to medium cracks | $5,000.00 | $10,000.00 | $7,500.00 |
Complete Underpinning Service Full structural support solution | $15,000.00 | $25,000.00 | $20,000.00 |
Partial Underpinning Targets specific problem areas | $10,000.00 | $18,000.00 | $14,000.00 |
Screw Pile Installation Includes engineering and installation | $12,000.00 | $20,000.00 | $16,000.00 |
Concrete Slab Stabilisation Stabilises and reinforces slabs | $8,000.00 | $15,000.00 | $11,500.00 |
Prices vary by job scope, access, and timing. Get personalized quotes for accurate pricing.
Underpinning Licensing & Rules in New South Wales
Important regulations and resources to help you hire with confidence in New South Wales.
Contractor licence required
Underpinning and piering are classified trade work. Contractors must hold the appropriate NSW Home Building licence to contract or advertise for residential work valued over $5,000.
Construction certificate
After development consent, a construction certificate or complying development certificate must be obtained before any building work begins. The certificate verifies compliance with the Building Code of Australia and consent conditions.
Home building compensation cover
For home building projects exceeding $20,000, licensed builders must obtain home building compensation insurance (formerly home warranty) before taking a deposit or starting work. The policy protects owners if the builder cannot complete or rectify defects.
General construction induction card
People performing construction work must hold a White Card issued after completing general induction training. Cards from other states are recognised.
Engineer certification
Underpinning design and supervision should be undertaken by a qualified structural engineer. Certification ensures compliance with the National Construction Code and relevant Australian Standards.
Public liability and workers insurance
Maintaining public liability, workers compensation and professional indemnity insurance is recommended to protect against injuries, property damage and professional negligence.
Helpful Resources
Home building licence categories
Verify licence status and find registered practitioners.
Insurance cover for building work
Know your rights for domestic building work and disputes.
Construction certificate guidance
Industry standards, training, and professional guidelines.
SafeWork NSW construction induction
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Frequently Asked Questions
What is included in underpinning services?
Underpinning typically includes soil investigation, foundation strengthening, and structural support improvements.
Are underpinning contractors licensed in Australia?
Yes, underpinning contractors must be licensed and adhere to Australian building standards.
Does underpinning come with a warranty?
Most underpinning services offer warranties, typically covering structural integrity for several years.
How long does an underpinning job take?
Underpinning projects usually take 2 to 4 weeks, depending on the complexity and size.
Are there call-out fees for underpinning assessments?
Some contractors charge a call-out fee for initial assessments, which may be waived upon hiring.
What materials are used in underpinning?
Concrete and steel are commonly used materials in underpinning to strengthen foundations.
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