Auction vs Private Treaty in WA: Which Is Right for Your Sale?

Most homes in Western Australia sell by private treaty, where buyers make written offers that can include conditions such as finance and inspections. Auction suits properties where demand is strong and value is hard to pin down: competing buyers set the price on the day, and the winning bid is usually an unconditional contract. The right method depends on your property, your local buyer pool and how much certainty you need on timing and terms.

What is the difference between auction and private treaty?

Private treaty: the home is marketed with a price or price guide, buyers submit written offers, and you negotiate until one is accepted. Offers can be conditional, for example on finance or a building inspection. Most WA sales use the standard REIWA offer and acceptance contract. See our guide to the WA settlement process.

Auction: the campaign builds to a public auction day. Buyers bid against each other, and if bidding reaches your reserve the highest bidder buys on the auction terms. If it does not, the property is “passed in” and the agent can negotiate privately with the bidders (Consumer Protection WA).

When does an auction work best in Perth?

• Unique or prestige homes where comparable sales are scarce.
• Suburbs with strong competition and several motivated buyers.
• Sellers who want a fixed sale date and unconditional terms.
• Deceased estates and properties where a transparent public process is valuable.

When is private treaty the better choice?

• Homes with plenty of comparable sales, where the price is easier to establish.
• Buyer pools that rely on finance and need conditional offers, such as first home buyers.
• Sellers who want to see offers before committing to a price.
• Quieter markets, where an auction that passes in can mark the campaign.

REIWA reported a median Perth house selling time of 23 days in August 2026, so many private treaty sales move quickly when they are priced on evidence (REIWA).

What are the WA rules for selling at auction?

Your agent must use a licensed auctioneer, or engage a consultant auctioneer. Before the campaign you sign an authority to auction, a binding contract that sets out the agent’s services and fees. You set a reserve price with your agent, which is the lowest price you will accept; it stays confidential until bidding reaches it, and the auctioneer cannot sell below it (Consumer Protection WA).

Is there a cooling-off period after an auction in WA?

Buyers at a WA auction are usually signing an unconditional contract, so they need finance approved and inspections done before they bid. That is why auctions can deliver certainty for sellers, and why some buyers will not bid. Our auction bidder checklist explains the buyer side.

Does auction cost more than private treaty?

Auctions usually add an auctioneer’s fee and often a larger marketing budget, because the campaign has to build competition by a fixed date. Commission is negotiable for either method in WA and must be written on your agency agreement (Consumer Protection WA). Our guide to the cost of selling a house in Perth sets out typical commission and marketing costs.

Can you switch methods during a campaign?

Yes. Private treaty campaigns can move to an auction or a fixed closing date if several buyers emerge, and auctions can accept offers before the day if a buyer’s price is strong enough. Agree how offers will be handled with your agent at the start, in writing.

How do you decide?

Look at how similar homes in your street and suburb have sold in the last year, who your likely buyers are, and whether they rely on conditional finance. A good agent will show you that evidence and recommend a method with a reason, not a default. Request a free appraisal and we will compare both methods for your property.

Frequently asked questions

Do most homes in Perth sell at auction?

No. Most WA homes sell by private treaty, with auctions more common for prestige, unique or high-demand properties.

What happens if my home is passed in at auction?

The property has not sold. Your agent can then negotiate privately with the bidders, usually starting with the highest.

Can a buyer make a conditional offer at auction?

Auction contracts are usually unconditional. Buyers who need finance or inspection conditions may make an offer before the auction if the seller agrees to consider it.

Who sets the reserve price?

You do, with advice from your agent. It stays confidential and is the lowest price the auctioneer can accept.