Most people who move house in Perth are doing two transactions at once, not one. They are selling the home they live in and buying the next one, and the whole exercise lives or dies on a detail nobody talks about at the home open: whether the two settlement dates line up.
Get that right and it is one move, one removalist, one day. Get it wrong and you are either paying to own two homes at once, or paying rent and storage between them, or accepting a lower price on your own sale because you have run out of time to hold out. None of those outcomes come from a bad market. They come from two contracts that were negotiated separately by people who never spoke to each other.
Should you sell first or buy first in Perth?
The question is usually asked as though it has two answers. In practice the sequencing that works is neither of them. You do not have to sell before you buy, and you do not have to buy before you sell. You have to be ready to sell before you start making offers, which is a different thing and a much shorter list of work.
Overview
What this article covers
- 01The three ways to move, and what being ready to list is worth
- 02How a subject to sale offer works in WA, and why sellers discount it
- 03Why an unmodified 48 hour clause is a trapdoor, and what to negotiate instead
- 04Where bridging finance fits, and why it is a symptom rather than a plan
- 05Settlement date mechanics: what moves, what does not, and who pays when it slips
- 06The coordination failures that break linked moves
- 07How to plan both dates before you list
The three ways to move
There are only three shapes to this problem, and each one trades a different thing away. Sell first and you trade certainty of housing for certainty of budget. Buy first and you trade money for the specific home. Line them up and you trade simplicity for planning work.
Timing matters more than it did a year ago. REIWA reported that Perth houses sold in a median of 23 days in July 2026, ten days slower than a year earlier, with units at 19 days. That is a median, so half of all sales took longer. Build the calendar around a slower sale than you expect.
Sell first, then buy
- What you gain
- You know your exact budget and your exact settlement date.
- What it costs you
- You may need somewhere to live if you cannot find the right home in time. Rent, storage, or a second move.
- Best when
- Your borrowing capacity depends on the sale proceeds, or you would struggle to carry two mortgages even briefly.
Buy first, then sell
- What you gain
- You secure a specific home. Useful when the thing you want almost never comes up.
- What it costs you
- You carry both properties until your home sells, usually through bridging finance, and you negotiate your own sale under time pressure.
- Best when
- You have genuine equity or savings behind you, and the home you are buying is scarce enough that losing it costs more than the holding cost.
Line the two up
- What you gain
- One settlement funds the other. No bridging period, no rental gap, one move.
- What it costs you
- It takes planning and it can fail. Every condition on either contract is a date that can move, and a subject to sale offer is worth less to the seller you are buying from.
- Best when
- You can start the sale campaign before you commit to a purchase, and both sides are willing to negotiate the settlement date rather than the price alone.
What ready to list actually means
Ready is a narrower thing than listed or sold. It means every piece of work standing between you and a live campaign is already done, so the gap between your offer being accepted and your home hitting the portals is days rather than weeks.
- Photography, floorplan and copy are done. This is the longest lead time in a campaign and the easiest to bring forward. It can sit finished on a drive until you need it.
- Your price is decided, not just discussed. A number you have already committed to is what lets you answer a seller's question about your sale with something specific.
- The agency agreement is signed. Signing takes a day you will not have when a 48 hour notice lands.
- Disclosure documents are gathered. For a strata or survey-strata property that means the Form 28 and Form 29 that Consumer Protection WA requires you to give the buyer before the sale, plus the strata plan and by-laws. Chasing these from a strata manager is a two week job you do not want on the critical path.
- Finance is pre-approved on the purchase. Including the version of the numbers where your home sells for less than you hope.
Case note
Where we have seen this go wrong: one wrong number, two failed sales
We have seen a linked move fail outright because the number the sellers were working from was not real. Another agency had appraised their home at more than $150,000 above what it was actually worth, which is the practice known as buying the listing: quote high to win the agency agreement, then walk the seller down once the campaign is running.
Their home did not sell at that price. Because the two transactions were linked, the failure did not stop there: their own sale falling over took the second one with it, and neither property sold. One inflated appraisal, two failed sales.
That is the part people underestimate. In an ordinary sale an overquote costs you time and a price reduction. In a linked move every downstream decision is calculated from that figure: what you believe you can borrow, what you offer on the next house, and the settlement date you agree to. Being ready is worth nothing if you are ready against the wrong price. Get a second appraisal, and treat the highest number as the one that needs explaining, not the one that is right.
When buying first is genuinely the right call
Buying first has a reputation as the reckless option, and usually it is. But there are cases where the maths favours it. If you are after something that rarely comes up, a particular street, a specific block size, a house that suits a family member's mobility, then missing it can mean another year of waiting rather than a few months of inconvenience.
The test is whether you could fund the purchase and hold both properties for six months without the arrangement forcing you to dump your own home at whatever price arrives first. If a slow sale would force your hand on price, you are not buying first. You are borrowing against a discount you have not yet agreed to.
If you are trading down rather than across, the equity position often makes buying first far more comfortable. Our guide to downsizing in Perth covers how that changes the sequencing.
How a subject to sale offer works in WA
A subject to sale offer is an offer on the standard WA Offer and Acceptance contract that is conditional on you selling your existing home first. If your home does not sell within the agreed period, the contract ends and your deposit is returned. It is the formal mechanism behind almost every linked move in this state.
It is also the condition sellers like least, and it is worth understanding exactly why before you write one.
That protection is the 48 hour clause, properly called the Two Business Day Condition. It lets the seller keep marketing the property, and if a second offer arrives that they would rather take, they give you notice, usually in writing. You then have two clear business days to waive the subject to sale condition and go unconditional, or the contract ends and your deposit comes back.
Consumer Protection WA is explicit that this is not a literal 48 hours but the equivalent of two business days, so notice served on a Thursday afternoon can run past the following Monday. One detail cuts the other way, and sellers often miss it: REIWA points out that accepting a subject to sale offer binds the seller to that agreed price during the notice period, even if the second offer is higher, provided the first buyer goes unconditional in time. The clause protects the seller from delay, not from a better price arriving later.
The 48 hour clause is negotiable too
Buyers treat this clause as a fixed feature of the contract. It is not. It is a special condition, which means its wording is negotiated like every other special condition, and Consumer Protection WA explicitly warns that there is considerable variation in the wording and content between contracts.
The fix is to negotiate when the clause can start, not just what it says. A deferral period, where the seller agrees not to invoke the clause for a set number of days or weeks from acceptance, gives your own campaign a genuine run at producing a buyer before the pressure starts.
Case note
What we negotiated: a five week deferral
On one purchase we negotiated a five week deferral before the seller could invoke the clause at all. That gave our buyers a full campaign on their own home, with photography, home opens and offers, before any two business day notice could land on them. They sold inside the deferral and went unconditional without ever being put under the clock.
Five weeks is what that seller agreed to, not a standard. What you can negotiate depends on how much competing interest the seller has and how strong the rest of your offer is, so treat a deferral as something to ask for rather than something you are entitled to.
The rest of the wording decides whether the clause is fair protection or a trapdoor: how notice is served and what counts as receipt, whether the seller must hold a signed competing offer or merely a stronger one, and when the two days start running. For how these sit inside the contract as a whole, see our guide to making an offer on a house in Perth.
What makes a subject to sale offer more acceptable
The condition is a risk to the seller, so everything that reduces that risk buys you goodwill. In practice that means evidence, not assurances.
- Already be on the market. A subject to sale offer from someone whose home is live, photographed and getting enquiry is a different proposition to one from someone who is thinking about listing.
- Bring the numbers. Home open attendance, enquiry counts and any offers received so far tell the seller how real your sale is. So does an appraisal that is priced to sell rather than priced to flatter.
- Keep the condition period short and specific. A tight, dated window reads as confidence. An open-ended one reads as hope.
- Be clean on everything else in the contract. Finance already pre-approved, a short inspection period, and a settlement date that suits the seller. You are asking for one concession, so do not ask for four.
- Understand the 48 hour clause before you sign it. Know what notice looks like, how it is served, and what you would actually do if it landed on a Friday.
Where bridging finance fits
ASIC's Moneysmart defines bridging finance as short-term finance covering the period between buying a new property and selling your existing one. That definition is worth sitting with, because it tells you exactly what the product is for. It is for a gap. If there is no gap, there is nothing to bridge.
Two features are worth knowing even if you never use one. Mortgage Choice describes the structure as a peak debt and an end debt: you owe everything at once while you hold both properties, and what is left after your sale becomes an ordinary mortgage. Interest during the bridge is usually capitalised rather than repaid, so nothing leaves your bank account and it does not feel expensive while it is happening. It arrives as a larger end debt.
There is also a clock. Money.com.au notes that most bridging loans in Australia are designed to be held for a maximum of six to twelve months. That deadline is the part that hurts. A buyer whose bridging term is running out is a seller who cannot afford to say no, and buyers can read that in how quickly you respond to a low offer.
Rates, fees and lending criteria vary by lender and borrower, and they change. Get current figures from a broker for your own circumstances rather than working off a number in an article. The shape of the cost is consistent: it scales with how big your peak debt is and how long you hold it.
Settlement dates: what moves and what does not
Buyers negotiate price hard and treat the settlement date as administrative. In a linked move it is the opposite. The date is the part of the contract that decides whether you need bridging finance, a rental, or neither.
Consumer Protection WA puts the usual settlement period at 30 to 90 days, a wide enough band to fit two contracts inside if you negotiate it deliberately. Its Home Buyers Survival Guide puts it plainly: get advice from your settlement agent before negotiating a settlement date, not after. As a starting point it suggests 28 days after an offer becomes unconditional or finance approval is received, but that is guidance, not a rule. Longer and shorter dates are written every day, and a date can be expressed as a fixed calendar day or as a period running from another event such as finance approval.
Settlement mechanics
What you can negotiate, and what you are stuck with
- Negotiable: the settlement date itself, whether it is fixed or relative to another event, the length of the finance and inspection periods, the deposit amount, and whether possession happens at settlement or on another agreed day.
- Negotiable, but only before both sides sign: any change to the date afterwards needs a written variation signed by both parties. A verbal agreement between the two agents is not a variation.
- Not negotiable: there is no cooling off period on WA property contracts. Once you are signed and unconditional, you are committed, and changing your mind is not one of the available moves.
- Fixed by the General Conditions: the seller must give you the opportunity to inspect the property on one occasion within five business days before the possession date, and the delay provisions below apply unless your contract varies them.
What happens when one side moves
Most WA residential contracts incorporate the Joint Form of General Conditions for the Sale of Land, which gives a grace period of three business days after the settlement date. Settle inside it and neither party can claim anything. Beyond it, the party who caused the delay pays the other interest, calculated daily on the balance of the purchase price from the original settlement date. That mechanism is set out by Consumer Protection WA, which publishes no rate of its own: the rate is the one set down in the General Conditions, commonly 9% per annum in the 2022 Joint Form but variable by special condition. Nor is the interest automatic. The party claiming it must itself be ready, willing and able to settle and must give the other party notice of that, so serve it early. A late notice shortens the period you can claim for.
The coordination failures
Linked moves usually come unstuck in the gaps between people who each did their own job correctly. These are the five that recur.
- Two agents who never speak. The agent selling your home is optimising price and campaign length. The agent selling you the next one is optimising their vendor's certainty. Neither is looking at your calendar, and neither is wrong to. Somebody has to hold both dates, and by default nobody does.
- A finance clause that outlives the sale. Your purchase finance was approved on the assumption your home sells at a certain price by a certain date. If your sale price lands lower or your settlement moves, the approval can need re-assessing. Tell your broker the moment either contract changes, not at the end.
- A deposit locked in the wrong place. Deposits are held in a licensed agent's or settlement agent's trust account and cannot be released without both parties agreeing, a valid notice process, or a court order. By default it stays there until settlement, so plan to fund your purchase deposit separately. Early release is possible only if your buyer agrees in writing and the contract allows it. Do not build a plan on the assumption that they will.
- Conditions stacked in the wrong order. If your purchase is subject to the sale of your home, and your sale is subject to your buyer's finance, then your certainty date is your buyer's finance date, not your own. Work backwards from the last condition in the chain, not the first.
- Two settlement agents who find out late. Same-day settlements are routine, but only if both settlement agents know the transactions are linked and can sequence the funds. Tell them at the start. Do not let them discover it in settlement week.
Who holds both sides of the move
Nothing above requires a particular agency. It requires that one person is accountable for both dates, and that person is usually you. If you are running it yourself, write both settlement dates on the same page, share that page with your broker and your settlement agent, and update it the moment either contract changes.
Paying someone to hold the buying side is the step most movers skip, usually on cost, and the published ranges explain why. Buyers Agent Perth lists a complete buying service at $8,000 to $12,000 plus GST under $750,000, $12,000 to $18,000 plus GST between $750,000 and $1.5 million, and $18,000 to $25,000 plus GST above that, or 1.5% to 2.5% plus GST on a percentage agreement. That is one agency's published schedule rather than a market survey, and others quote differently. In a linked move the number matters twice over: a fee on the purchase sits on top of the fee on your sale, and a percentage fee rises with the price you end up paying, which is an odd incentive to hand the person negotiating for you.
Whoever you engage, check the licence first. Consumer Protection WA is clear that a buyer's agent must be a licensed real estate agent or sales representative under WA law, and publishes a licence search so you can verify it yourself. The same page lists what to establish before signing: the services included, the total cost, and what happens if you stop looking or buy without their help.
Our honest verdict on Perth buyer's agents goes through when that spend is genuinely worth it.
You can read how the two sides fit together on our Perth buying page, compare homes while your own sale runs with KeyHive Shortlist, or, if you have already found your buyer and only need the paperwork handled, use our Contracts Only service on the sale side.
On the selling side the fee comes out of the proceeds that fund your purchase, so it changes the arithmetic more than most people expect. Our breakdown of what agents charge in Perth compares the models side by side, and current KeyHive pricing is on the pricing page.
How to plan both dates before you list
Most of this work happens before either contract exists.
- Get a realistic appraisal on your own home first. Not the highest number you can find. The number that will actually transact, because every date downstream depends on it. Start with a free property appraisal.
- Talk to a broker before you talk to an agent. Find out what you can borrow with and without the sale proceeds. That single answer decides whether sell first is a preference or a requirement.
- Choose your settlement date first, then work backwards. Pick the day you want to move. Count back through settlement, condition periods, campaign length and preparation. If the calendar does not fit, you found out now rather than in the middle of a negotiation.
- Have the campaign built, then decide when to launch. Preparing is not the same as going live. Build the campaign before you start offering, then decide with your agent whether to launch straight away or hold it until your offer is accepted. Live enquiry is the strongest evidence you can show a seller, but launching before you have found anything can leave you under contract with nowhere to go.
- Appoint one settlement agent for both files. You are allowed to use the same settlement agent for your sale and your purchase, because you are the client on both. That is a different question from a settlement agent acting for both sides of a single transaction, which Consumer Protection WA says requires both parties' permission on the appointment form. One agent across your own two files is the simplest way to make sure the funds sequence correctly on the day.
- Write the fallback down. Decide in advance what you do if the sale is slow: extend, reprice, rent short term, or bridge. Deciding under deadline pressure is how people end up with the expensive option by default.
For what happens between acceptance and keys on each contract, read our WA settlement guide, and for the contract itself, the WA property contracts guide.
Decide the day you want to move, then negotiate everything else backwards from there.
FAQ
Questions people ask when moving both ways at once
Should I sell first or buy first in Perth?
For most people, both at once. The aim is to be ready to list the moment you start making offers, which means photography, pricing, the agency agreement and any strata disclosure documents are already done. A buyer who can launch a campaign the day their offer goes in writes a more attractive subject to sale offer, carries less risk on the 48 hour clause, and moves once instead of twice.
What is a subject to sale offer in WA?
It is an offer on the Offer and Acceptance contract that is conditional on you selling your existing home first. Because it ties the seller up for an uncertain period, most WA sellers who accept one also insert a 48 hour clause, properly called a Two Business Day Condition, letting them keep marketing and give you two clear business days to go unconditional if a better offer arrives.
How do I avoid bridging finance when moving house?
Bridging finance exists to cover a gap between two settlement dates, so the way to avoid it is to remove the gap. Have your own home ready to list before you start making offers, get it under contract before you go unconditional on the purchase, then negotiate the two settlement dates to fall on the same day or close to it. Consumer Protection WA puts the usual settlement period at 30 to 90 days, which is wide enough to fit two contracts inside if you negotiate the date deliberately.
Can the 48 hour clause be delayed or negotiated?
Yes. The 48 hour clause is a special condition, not a statutory right, and Consumer Protection WA notes there is considerable variation in how it is worded. You can ask for a deferral period so the seller cannot invoke it for a set time after acceptance. On one KeyHive purchase we negotiated a five week deferral, which gave the buyers a full campaign on their own home before any two business day notice could be served. What a seller agrees to varies with how much competing interest they have.
What happens if my sale settles late and my purchase does not?
Under the Joint Form of General Conditions used in most WA contracts, there is a grace period of three business days after the settlement date. Beyond that, the party who caused the delay pays interest to the other party, calculated daily on the balance of the purchase price. The rate is the Prescribed Rate set in the General Conditions, commonly 9% per annum in the 2022 Joint Form, and a special condition can vary it. Interest is not automatic: the party claiming it must be ready, willing and able to settle and must give notice of that.
Sources
Consumer Protection WA: Sale by offer and acceptance and Property settlement, Property settlement, Planning to buy a property, Selling a property and the Home Buyers Survival Guide. RevenueWA: Buying a house or land. REIWA: What is a subject to sale offer, Why subject to sale offers are worth considering and Perth market update, July 2026. ASIC Moneysmart: bridging finance. Mortgage Choice: How bridging loans work. Buyers Agent Perth: Fees and pricing. Money.com.au: Bridging loans explained.
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