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Guide · Before You Buy

Building Inspection: Before Or After The Offer?

In NSW, for a private-treaty sale, the usual answer is after your offer is accepted and before exchange, or inside the 5-business-day cooling-off period. At auction, before you bid. Here is the NSW sequence, the pros and cons of each timing, gazumping, and a decision table by sale method.

From Sure Sight Inspections: Ibrahim Durdu, a licensed builder trained in timber pest inspection, with 10 years in the trade, based in Smithfield, covering Greater Sydney. We inspect and report. We don’t sell repairs or treatment.

Illustrative: a couple walking up the path to an open home in a Sydney suburb
Illustrative image. Real defect photographs from Sure Sight inspections are added as they are supplied.

General information, not advice. We’re building and pest inspectors, not lawyers or conveyancers. The buying sequence below is general information. What your contract says, and whether an offer can be made subject to inspection, is for your conveyancer.

How buying works in NSW: offer, exchange, cooling-off, settlement

Most of the pages that rank for this question are written for Victoria, where the cooling-off period is 3 business days and the penalty is 0.2%, or for no state at all. NSW is different and the difference is the whole answer, so here is the sequence.

  1. Offer. You make an offer, usually through the agent. The vendor accepts it. Nothing is binding yet: in NSW an accepted offer is an intention, not a contract.
  2. Exchange. Both parties sign identical contracts and swap them. Now you are bound. On a private-treaty sale, the cooling-off period starts here.
  3. Cooling-off. 5 business days, ending at 5pm on day 5, during which you can withdraw at a cost of 0.25% of the price. Not at auction. The mechanics are in the cooling-off period NSW guide.
  4. Settlement. Typically 6 weeks after exchange, when the balance is paid and the keys change hands. After this, the house and everything in it is yours.

The inspection can happen at step 1, between step 1 and step 2, or inside step 3. It cannot usefully happen after step 3.

Inspecting before you make an offer

Pros and cons of inspecting before making an offer
ForAgainst
You offer with the report in hand, so the price already reflects what you found.You pay for a report on every house you seriously consider, including the ones you lose.
No clock: you can get an engineer's opinion or a treatment quote before you commit to anything.On a hot property, another buyer may exchange while you are waiting for a report.
The strongest position for an unconditional offer, if your conveyancer recommends one.The agent may not hold the property for you while you inspect; nothing obliges them to.

Inspecting after the offer is accepted, before exchange

Pros and cons of inspecting after acceptance and before exchange
ForAgainst
You only pay for a report on a house you have agreed a price on.You are still exposed to gazumping until exchange, and the inspection is 1 more day for that to happen.
The report can shape the contract before you sign it, via your conveyancer.The agent will push to exchange quickly. A report the same day is what makes this timing workable.
No 0.25% to walk away, because you have not exchanged.If the vendor will not wait, you are back to the cooling-off option.

Inspecting inside the cooling-off period

This is the timing most Sydney buyers end up using, and it works: exchange, book the same day, inspect within a day or 2, report the same day, decide before 5pm on day 5. The cost of walking away is 0.25% of the price. The advantage is certainty: you are exchanged, so nobody can gazump you, and you have a priced exit if the report finds something. The disadvantage is the clock, which is why the inspector’s report time matters more here than anywhere else. The full day-by-day plan is in the cooling-off guide.

Offer Accepted? Book The Inspection Today.

Building and timber pest in 1 visit, your report the same day, timed to your exchange or your cooling-off end date.

Buying at auction: no cooling-off, so inspect before you bid

At auction the fall of the hammer is exchange, there is no cooling-off period, and the deposit is paid on the day. Every serious bidder inspects beforehand, and the vendor’s agent expects it. The awkward economics are real: you may pay for reports on 2 or 3 houses before you win one. Compare that to bidding blind on a 1950s house on Sydney clay and finding the termites at settlement. If the vendor has commissioned a report and the agent offers it, read it, and then read the section below on relying on it.

Gazumping in NSW and why inspection speed matters

Gazumping is when the vendor accepts your offer and then accepts a higher one from someone else before you exchange. In NSW it is legal, because an accepted offer is not binding until exchange. Every day between acceptance and exchange is a day it can happen, and “we’re waiting on the building report” is the most common reason buyers give for the gap. A report that takes 3 business days is 3 days of exposure. A report the same day is 1. That is not a sales line; it is the reason the turnaround is the number we lead with.

The decision table, by sale method

When to inspect, by method of sale in NSW
How you're buyingWhen to inspectWhy
Private treaty, competitiveInside the cooling-off period, booked on the day of exchangeExchanging first removes the gazumping risk; the 5 days and the 0.25% give you a priced exit.
Private treaty, no competitionAfter acceptance, before exchangeNo 0.25% to walk, and the report can shape the contract. Only works if the vendor will wait.
AuctionBefore auction dayNo cooling-off. The report is your only window.
Pre-auction offerBefore you make the offer, or as a condition of it via your conveyancerA pre-auction offer is usually expected to be unconditional, which means a 66W certificate. Inspect first.
Off the planStage and handover inspections during and at the end of the buildThere is no house to inspect at exchange. The 10-day cooling-off is a contract question for your conveyancer.

What the inspection covers

Whichever timing you choose, the inspection is the same: the structure, the roof by drone, the roof void, the subfloor, the interior, the wet areas, the site drainage and the outbuildings, plus the timber pest inspection to AS 4349.3-2010 in the same visit, with the thermal camera and moisture meter included. Element by element, it is the what a building inspection covers guide.

Using the report to negotiate: price, repairs, or walking away

This is the canonical version of the advice; the service pages link here rather than repeating it. Three things to know before you use a report as a negotiating document.

  • The vendor is not obliged to fix or discount anything. A report gives you a reason to ask; it does not give you a right. What it does is make the ask specific: the defect, its location, its severity, and the kind of specialist who would quote the fix.
  • Separate the major from the minor before you go in. A list of 40 items, 38 of them cosmetic, weakens the 2 that matter. The summary page of the report does that separation for you; lead with it.
  • The conversation goes through your conveyancer, especially inside the cooling-off period, when your options are set by the contract and the deadline. The inspector supplies the facts; the conveyancer supplies the leverage.

Meena Ahn, Google review: “Swift and proactive with their communication and organising the building inspections. Reports were completed very quickly, and what I received was very clear, precise, and thorough. I was able to make my property purchase decisions with confidence (I rescinded on one based on their report), and gave me more points for my negotiations for my new one.” That is the report doing both jobs, on 2 different houses.

Can I rely on the vendor’s report?

Read it; do not rely on it. A vendor-supplied report was commissioned and paid for by the person selling the house. It may be entirely accurate. It was not written for you, you have no relationship with the inspector, and you cannot ring them with a question. It is useful as a preview of what your own inspection is likely to find and as a flag for anything the vendor already knows about. Then get your own.

A timeline that works in Sydney, in 3 steps

  1. Exchange, or offer accepted: call the same day and say which it is and what your deadline is.
  2. Inspection within a day or 2: structure and timber pests in 1 visit, no second appointment.
  3. Report the same day, decision with days to spare: proceed, renegotiate, or walk, with your conveyancer.

The full day-by-day version, with the public-holiday arithmetic and the 66W trap, is the cooling-off period guide. What the inspection costs relative to the 0.25% is the cost page.

Buying In Sydney? Get It Inspected First.

Building and timber pest in 1 visit, your report the same day, and a firm price before anything is booked.

Common Questions

Inspection Timing FAQs.

When should I get a building and pest inspection?

In NSW: after your offer is accepted and before exchange, or inside the 5-business-day cooling-off period after exchange. At auction, before you bid. The decision table above covers each sale method.

Can I rely on the agent's report?

Read it as a preview, then get your own. It was commissioned by the vendor, and you cannot ring its author with a question.

How long does the inspection take?

Long enough to do it properly; the time on site depends on the property. The number that matters for timing is the report, which is with you the same day.

What if the agent says there's another offer?

Sometimes there is. The way to remove the risk is to exchange and use the cooling-off period for the inspection, which turns a race into a 5-day window with a priced exit. Your conveyancer will tell you what the contract allows.

Can I make my offer subject to inspection in NSW?

General information, not legal advice. Conditions on an offer are a contract matter and your conveyancer drafts them. In practice, on a private-treaty sale, the cooling-off period already gives you a built-in inspection window after exchange; at auction there is no such thing.

What if the report finds something after exchange?

Inside the cooling-off period you can renegotiate, ask for an extension in writing, or rescind at a cost of 0.25%, all through your conveyancer. After the period ends, your options depend on the contract, which is why the report needs to be in your hands early.

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