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Which construction stages should I inspect?

The frame stage and practical completion are the most important inspections. Frame errors are expensive to fix after lining, and the PCI is your last chance to identify defects before handover. If budget allows, add the lock-up stage. For complex or custom builds, inspect every stage. A package deal ($800–$1,500) may be more cost-effective than individual inspections.

Can my builder charge me for hiring a private inspector?

In most Australian states, builders cannot charge you for hiring a private inspector — you have the right to independent verification. However, some contracts include clauses for 'additional site visits'. Check your contract. If the builder tries to charge you, contact your state's building authority. See our dedicated guide on this topic.

How much does a private building inspector cost?

Individual stage inspections cost $400–$800. A full package (all stages) costs $800–$1,500. The frame and PCI are the most important and worth the cost. Costs vary by inspector, home size and location. Compare quotes from several licensed, insured, independent inspectors.

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Building Process & Construction Stages

Construction Stage Inspections: When to Book, What They Cover & Costs

When to book inspections, what each covers, costs and which stages matter most.

5 min read·Compare My Build — Independent Resource· Updated July 2026

Cost estimates only: Any building or upgrade figures in this guide are indicative, not fixed prices or quotes. Costs and inclusions vary by project, supplier, location and time. Confirm current written prices and specifications directly with your builder, suppliers and relevant trades.

Key Takeaways

Private building inspections can identify defects you might miss at each construction stage
The frame stage and practical completion are the most important stages to inspect
A private inspector costs $400–$800 per inspection; $800–$1,500 for a package
Can a builder charge for a private inspector? In most states, no — but check your contract
Stage inspections provide independent verification of quality and compliance

Private building inspections provide independent verification of your home's quality and compliance at each construction stage. While you can inspect yourself, a professional inspector knows what to look for and can identify defects you might miss. Understanding when to book inspections, what they cover and the costs helps you decide which inspections are worth it.

When to Book Inspections

Inspections can be done at each construction stage:

Slab stage — after the slab is poured and cured (before the frame begins)
Frame stage — after the frame is erected (before lock-up begins) — MOST IMPORTANT
Lock-up stage — after external walls, roof, windows and doors are installed
Fixing stage — after the internal fitout is substantially complete
Practical completion — the final inspection before handover — MOST IMPORTANT

What Each Inspection Covers

Slab inspection — slab dimensions, level, cracking, drainage provisions, plumbing rough-in
Frame inspection — room sizes, ceiling height, openings, bracing, nailing, alignment, compliance with plans and building code
Lock-up inspection — external cladding, roof, windows, doors, gutters, weather sealing
Fixing inspection — plaster, cornice, doors, cabinetry, tiling, tapware, appliances, paint
Practical completion inspection — EVERYTHING — comprehensive check of all surfaces, fittings, fixtures and external areas

Which Inspections Are Most Important

If budget is limited, prioritise these inspections:

Frame stage — MOST IMPORTANT. Frame errors are expensive to fix after lining. $400–$600.
Practical completion — MOST IMPORTANT. Your last chance to identify defects before handover. $400–$800.
Lock-up — IMPORTANT if you want to verify external work. $400–$600.
Slab — OPTIONAL for standard slabs; recommended for sloping blocks or complex slabs. $400–$500.
Fixing — OPTIONAL. Defects are easier to identify at the PCI. $400–$600.

Tip

Many inspectors offer a package deal — all stage inspections for a discounted price ($800–$1,500). If you plan to inspect at frame and PCI only, individual bookings may be cheaper ($800–$1,400 total). If you want inspections at every stage, a package is more cost-effective. Compare quotes from several inspectors.

Can a Builder Charge for a Private Inspector?

In most Australian states, builders cannot charge you for hiring a private inspector — you have the right to independent verification of the work. However, some contracts include clauses that allow the builder to charge for 'additional site visits' or 'supervision time' related to inspections. Check your contract. If the builder tries to charge you for inspections, contact your state's building authority. See our dedicated guide on this topic.

How to Choose an Inspector

Qualifications — ensure the inspector is a licensed builder or building surveyor
Experience — ask about their experience with residential construction
Insurance — ensure the inspector has professional indemnity insurance
Report — ask what the report includes (photos, descriptions, recommendations)
Independence — ensure the inspector is independent (not associated with the builder)
Price — compare quotes; $400–$800 per inspection is standard
References — ask for references from previous clients

Example Inspection Costs

Inspection	Example Cost
Slab stage	$400–$500
Frame stage	$400–$600
Lock-up stage	$400–$600
Fixing stage	$400–$600
Practical completion	$400–$800
Full package (all stages)	$800–$1,500

Real-world examples only. Costs vary by inspector, home size and location.

Questions to Ask Your Builder

Which stages should I book a private inspector for — frame and PCI at minimum?
Does the builder charge for private inspections, and is that allowed in my state?
What does a private inspection package cost vs individual stage inspections?
Is the inspector I'm considering licensed, insured and independent of the builder?

Common Mistakes to Avoid

Skipping the frame stage inspection — the most critical and cost-effective inspection
Not hiring a private inspector for the PCI — defects are easy to miss without experience
Not checking the inspector's qualifications, insurance and independence
Assuming inspections are included — private inspectors are an additional cost

Builder Tips

Prioritise frame stage and PCI inspections — these are the most important
A package deal ($800–$1,500) may be cheaper than individual inspections if you want all stages
In most states, builders can't charge you for hiring a private inspector — know your rights
Choose a licensed, insured, independent inspector — ask for references

Can a Builder Charge for a Private Inspector?

Know your rights regarding private inspections.

Read the Guide