If you and your ex-partner can’t agree on what the family home is worth, you’re not alone. It’s one of the most common sticking points in a property settlement — one person’s real estate agent says $1.2 million, the other’s says $980,000, and suddenly a conversation about splitting assets turns into an argument about whose valuation is “right.”

This is exactly the problem the Federal Circuit and Family Court of Australia’s single expert rule was designed to fix. Instead of each side hiring their own valuer and fighting it out, the court requires one independent, jointly instructed valuer to give evidence on what a property is actually worth.

In this article, we’ll explain how independent property valuation evidence is used in family law matters, why the courts favour a single expert rather than competing valuers, how the process actually works, and where the potential cost savings come from — plus what to do if you genuinely disagree with the outcome.

Summary

Family law valuations differ from a standard real estate appraisal because they’re prepared specifically as evidence for a property settlement, usually by a valuer registered with a body such as the Australian Property Institute. Under the Federal Circuit and Family Court of Australia (Family Law) Rules 2021, property evidence in a family law matter must generally come from a single expert witness, jointly appointed and instructed by both parties, rather than two competing valuers. This isn’t just a procedural quirk — it exists because “dueling experts” used to drag out property disputes, blow out legal fees, and leave judges (and separating couples) none the wiser about the actual value of the asset.

The single expert approach means one valuation fee, usually split equally, one report both sides can rely on, and a much clearer path to a consent order or negotiated settlement. It’s not always cheaper in isolation — a jointly instructed valuation still costs money — but it avoids the far larger cost of a “battle of the valuers,” extra court appearances, and cross-examining two experts at trial. Parties can still challenge a single expert’s report through a conference or written questions, and in limited circumstances the court will allow a second (“shadow”) expert, but that’s the exception, not the norm. Readers should understand what the single expert process involves before separation negotiations get underway, so they’re not caught off guard by how differently this works compared to a normal property sale.

What Are Family Law Valuations, and Why Does the Court Require One Expert?

A family law valuation is a formal, written assessment of a property’s market value, prepared specifically to be used as evidence in a property settlement — whether that’s heading to court, going through mediation, or formalising an agreement through consent orders.

It’s a different exercise to the free appraisal a real estate agent might give you. An agent’s appraisal is an informal opinion, often influenced by a hope of winning your listing down the track. A family law valuation is prepared by a qualified, independent valuer, follows a recognised valuation methodology, and, like any valuation prepared for legal proceedings, needs to be capable of withstanding scrutiny in court.

Under the Federal Circuit and Family Court of Australia (Family Law) Rules 2021, where the parties need expert evidence about the value of an asset — a house, a unit, a rural property, sometimes a business or other complex asset — that evidence generally has to come from a single expert witness. In practice, this means:

Both parties (usually through their solicitors) agree on who the valuer will be, or the court appoints one if they can’t agree.
Both parties jointly instruct the valuer in writing, setting out exactly what’s being valued and why.
The valuer owes a duty to the court, not to either party — they’re required to act independently under the Expert Witness Code of Conduct, regardless of who’s paying what share of the fee.
The resulting report can generally be relied on as evidence by both sides.

This is different from litigation over, say, a car accident or a building defect, where each side might commonly bring their own expert to argue their case. In family law, the starting position is the opposite: one expert, one report, unless there’s a good reason to depart from that.

The Old Problem: Dueling Valuers and Blown-Out Legal Bills

Before this approach became standard practice, it wasn’t unusual for each party in a property settlement to bring their own valuer to court. The husband’s valuer would value the house at one figure, the wife’s valuer at another, and the judge would be left trying to work out which expert to believe — or split the difference, which satisfied no one.

This created a few predictable problems:

Two valuation fees instead of one, often at $1,500–$3,000+ each depending on the property, before any court costs were even considered.
Extra hearing time, because both experts might need to be cross-examined about how they reached their figures.
More scope for disagreement, since two valuers using slightly different assumptions or comparable sales will rarely land on exactly the same number.
Delay, because resolving a genuine dispute between two experts can take months, especially if the matter is already before a busy family law list.

None of that helps a couple trying to finalise a settlement and move on with their lives. The single expert rule was introduced largely to cut through this — one independent opinion that both parties are bound to work from, rather than two opinions designed (even unconsciously) to favour whoever’s paying for them.

How the Single Expert Process Actually Works

Choosing and instructing the valuer

Typically, your solicitor and your ex-partner’s solicitor will agree on a suitably qualified valuer — often someone registered with the Australian Property Institute — or propose a shortlist for the other side to choose from. If you can’t agree, the court can order who the single expert will be.

Once appointed, both parties send a joint letter of instruction. This sets out what needs to be valued, the relevant date (property values can move quickly, so the valuation date matters), and any other information the valuer needs, such as access arrangements for an inspection.

The valuer’s duty

The valuer isn’t “your” valuer or “their” valuer — they’re the court’s expert. They’re required to give an independent opinion based on their own professional judgement, not what either party wants to hear. Discussing the “right” figure with them beforehand, or trying to pressure them toward a particular outcome, isn’t appropriate and can undermine the credibility of the report.

If you don’t agree with the valuation

It’s common for at least one party to feel the figure is too high or too low. If that happens, you generally have a few options before jumping straight to a second expert:

Ask written questions of the single expert to clarify how they reached their figure or to point out something they may have missed.
Request a conference with the valuer (sometimes involving both parties’ lawyers) to talk through the methodology.
Seek the court’s permission to rely on a second, independent (“shadow”) valuer — but this is only granted in limited circumstances, discussed below.

What you generally can’t do is simply get your own valuation privately and expect the court to weigh it equally against the single expert’s report.

Where Family Law Valuations Save You Money

This is the part that matters most for anyone trying to keep their separation costs under control. The savings from the single expert process show up in a few places:

One fee, not two. Unless the court orders otherwise, the cost of the single expert is usually shared equally between both parties — one report to pay for between you, instead of two.
Fewer court appearances. Because both sides are relying on the same evidence, there’s less need for hearings dedicated to arguing over competing valuations.
Less legal work. Your solicitor isn’t spending hours preparing to cross-examine an opposing valuer, or briefing your own valuer to defend their figure — time that’s billed at hourly rates.
Faster settlements. A single, agreed figure removes one of the biggest sources of ongoing disagreement, which often means matters resolve through negotiation or consent orders rather than a defended trial.
Reduced risk of a “re-do.” Courts are generally reluctant to allow a second valuation, so there’s less chance of paying for the exercise twice.

To put it plainly: the jointly instructed valuation itself isn’t free, but it’s almost always cheaper than the alternative — two valuers, two sets of legal argument, and possibly a trial to sort out whose number the court prefers.

When a Shadow Expert or Second Opinion Might Be Allowed

The court can permit a party to rely on a second expert, but the bar is set deliberately high. You’d typically need to show something like a genuine flaw in the methodology, new information the single expert didn’t have, or a real risk of injustice if you’re limited to only questioning the existing report.

Courts have consistently taken the view that allowing shadow experts too readily would undo the whole point of the single expert rule — cost and time savings for separating families. So while it’s not impossible to get permission for a second valuer, it’s the exception rather than something to plan around from the outset.

Common Misconceptions About Family Law Property Valuations

“A real estate agent’s appraisal is good enough.”

An appraisal can be a useful, free starting point to get a rough sense of value, but it’s not accepted as expert evidence in family law proceedings. It’s an informal opinion, not a valuation prepared to court standards.

“The valuer works for whoever pays more of the fee.”

Even where one party contributes more toward the cost, the valuer’s duty is to the court and to providing an independent opinion — not to either individual paying the bill.

“One valuation figure lasts forever.”

Property markets move. A valuation is generally tied to a specific date, and if there’s a long delay between the valuation and when the matter is actually resolved, an updated valuation may be needed.

“The rules are the same everywhere in Australia.”

Mostly, yes — but Western Australia is the exception (see below), and how the single expert rule is applied can vary slightly depending on which registry or court is handling your matter.

Getting Ready for Your Family Law Valuation

A few practical things make the process smoother once a single expert is appointed:

Arrange access early. The valuer will usually need to physically inspect the property, so sort out access arrangements (and any awkwardness around who’s still living there) as soon as possible.
Gather relevant documents. Recent renovations, building approvals, rental appraisals (if it’s an investment property), or details of any unusual features can all be relevant to an accurate valuation.
Understand the valuation date. Ask your solicitor to confirm which date the property is being valued as at — this can matter a lot in a fast-moving market.
Keep expectations realistic. A qualified valuer’s job is to reach an independent, defensible figure, not to advocate for either party. Going in expecting the valuation to match your own estimate can set you up for disappointment.

A Quick Note for Western Australia

Western Australia sits slightly outside this system. Western Australia has a separate family court system: the Family Court of Western Australia hears family-law matters in WA, but married couples’ property matters are generally governed by the Commonwealth Family Law Act 1975, while de facto property and maintenance matters are generally governed by the WA Family Court Act 1997. The broad approach to independent expert evidence is similar, but if you’re separating in WA, it’s worth confirming the specific process with a local family lawyer.

FAQs

Do I have to use a single expert, or can I just get my own valuation?

In most family law property matters, the court expects evidence about value to come from a single, jointly instructed expert. You can get an informal valuation for your own understanding, but it generally won’t carry the same weight as the single expert’s report if the matter goes before a court.

Who pays for the single expert valuation?

Unless the parties agree otherwise, or the court orders something different, the cost is usually shared equally between both parties.

What if my ex-partner and I can’t agree on who the valuer should be?

Your solicitors can try to agree on a suitable, appropriately qualified valuer. If that’s not possible, the court can appoint one.

Can I get a second valuation if I think the single expert got it wrong?

Only with the court’s permission, and only in limited circumstances — for example, a genuine problem with methodology or a real risk of unfairness. It’s not something to rely on as a default option.

Does a family law valuation cover superannuation or business interests too?

A property valuer values real estate. Superannuation and business interests are usually valued separately, often by different types of experts (such as actuaries or forensic accountants), depending on what’s involved in your settlement.

How long does a family law valuation take?

It varies depending on the property and how quickly access can be arranged, but a straightforward residential valuation is often completed within a few weeks of instructions being finalised.

Conclusion

The single expert rule exists to stop separating couples from paying twice — once for two competing valuers, and again in extra legal fees arguing over whose figure is correct. One independent, jointly instructed valuation gives both parties a shared starting point, which usually means a faster, less costly path to a settlement. It’s not the only cost in a property matter, but it’s often one of the more manageable ones.

If you need a property valued for a family law matter, AC Valuers can act as an independent single expert or provide guidance on how the process works for your situation. You can reach AC Valuers on (02) 9666 1488 to discuss what’s involved.

Family Law Valuations: Why a Single Expert Saves Money During Separation