Getting multiple quotes for foundation repair is always a good idea, but comparing them meaningfully requires knowing what to look for beyond the bottom-line price. Foundation repair quotes can vary enormously in what they include, how they are scoped, what assumptions they make, and what level of professional oversight and warranty they provide. A $12,000 quote and a $20,000 quote for what appears to be the same job may reflect very different scopes of work, very different risk assumptions, or very different levels of quality. This guide helps you compare apples with apples. For more on why quotes vary, see our guide on why underpinning quotes vary so much.
Quick answer (BLUF)
When comparing foundation repair quotes in Wagga Wagga, look for: clearly itemised scope, specified materials and methods, number and depth of underpinning points, whether engineering design is included, a written warranty, proof of licensing and insurance, and a process for managing variations. Red flags include unitemised lump-sum quotes, no engineering involvement, verbal-only warranties, and pressure to sign quickly.
The essentials of a good foundation repair quote
1. Written, itemised scope of work
A reliable quote describes what the contractor will do in specific, measurable terms. For underpinning, this means:
- Number of underpinning points (pits or piers)
- Location of each point relative to the floor plan
- Depth and dimensions of each pit or pier
- Concrete specification (strength grade, any special admixtures)
- Reinforcement specification
- Any drainage works included
- Site preparation and clean-up
For restumping, this means:
- Number of stumps to be replaced
- Stump type and specification (concrete, steel, adjustable)
- Footing pad specification
- Bearer adjustment and relevelling scope
A quote that simply says “underpinning, 10 points, $15,000” without these details is difficult to compare with a more itemised competitor quote. Ask for more detail.
2. Engineering design, included or separate?
Some contractors include the cost of an engineering design in their quote. Others quote the construction work only and require you to separately engage a structural engineer. This distinction can represent a cost difference of $1,500 to $4,000 and a timeline difference of 2-4 weeks.
Clarify upfront:
- Is a structural engineering design included in the price?
- If not, is an engineering design required for this project?
- Will an engineering certificate be issued on completion?
For insurance purposes, for heritage properties, or for any project where compliance documentation is needed for a property sale, an engineering certificate is typically essential. Ensure the quote path delivers this documentation.
3. Warranty terms
Foundation repair warranties are not standardised in Australia. Quality contractors offer warranties of 5-25 years on their workmanship and the structural performance of the repair. Before accepting a quote, confirm:
- What is the warranty period?
- What does it cover? (Settlement, crack return, material failure?)
- What does it exclude? (New events, extreme weather, activities beyond the contractor’s control?)
- Is the warranty backed by the contractor’s own business, or by an insurance-backed product?
- Is the warranty transferable to a future purchaser if the home is sold?
See our guide on warranties and guarantees in foundation repair for more detail.
4. Licensing and insurance
All foundation repair contractors in NSW must hold a current contractor licence. For structural work, the contractor should hold a Structural landscaping or General Building licence under NSW Fair Trading. For work exceeding $20,000, the contractor is required to have Home Building Compensation Fund (HBCF) insurance.
Before accepting a quote, verify:
- Contractor licence number (searchable at NSW Fair Trading)
- HBCF certificate for projects exceeding $20,000
- Public liability insurance (minimum $10 million is standard; $20 million preferred)
Do not proceed with a contractor who cannot provide these credentials.
5. Exclusions and variations
A well-written quote clearly states what is not included. Common exclusions to look for:
- Rock encountered during excavation (typically billed as a variation)
- Services relocation costs
- Crack repair and cosmetic reinstatement (often quoted separately)
- Engineering sign-off certificate cost
- Any follow-up works if movement continues post-repair
Exclusions are not inherently a problem, they are normal practice. What matters is that they are clearly stated so that both parties understand what the base price covers and what might generate additional cost.
The cheapest quote is not always best value
In foundation repair, price differences often reflect genuine differences in scope, not just contractor profit margins.
A contractor who quotes fewer underpinning points may be underestimating the scope. A contractor who uses lighter pier specifications may be under-engineering for the actual loads. A contractor who does not include drainage correction may be leaving the cause of the problem unresolved, meaning the repair will need to be redone.
When a quote is significantly lower than others, ask specifically why. Ask what they have excluded, what assumptions they have made about subsoil conditions, and how they will handle the situation if conditions are worse than anticipated.
Questions to ask each contractor
- How did you arrive at the number of underpinning points or stumps?
- What engineering oversight will this project have?
- Will I receive an engineering certificate at completion?
- What is your warranty, and what does it specifically cover?
- How do you handle unexpected conditions (rock, services, worse deterioration than visible)?
- Can you provide references from similar projects in Wagga Wagga in the last two years?
- Are you HBCF insured for this project value?
FAQs
Two contractors are quoting very different numbers of underpinning points, how do I know who is right?
This is a case where independent engineering advice is invaluable. Commission a structural engineer to review both quotes and their rationale. The engineer’s independent assessment of how many points are required will tell you which contractor is scoping the job correctly. The cost of an independent engineering review is typically $500 to $1,000 and can save you from either overpaying or from accepting an inadequate repair.
Can I ask for a fixed-price contract?
Yes. A fixed-price contract removes the risk of variations blowing out your budget. The tradeoff is that contractors factor unknown-condition risk into their fixed price. A well-understood project with good geotechnical information is more likely to attract a fair fixed price. For projects with significant unknowns (deep subsoil, old unreinforced footings, uncertain service locations), a schedule-of-rates or cost-plus approach may be more appropriate.
Should I use the same contractor who did the inspection?
It is common and generally acceptable for the contractor who does the inspection to also quote the works. The important thing is that the diagnosis drives the scope, if the inspection was thorough and the scope is derived logically from the findings, the fact that the same party quotes and executes the work is not a conflict. For larger projects or where there is uncertainty about the diagnosis, an independent inspection by a structural engineer followed by competitive quoting is the more rigorous approach.