Australians collectively own around $11 trillion in residential property. Yet most homeowners have only a vague sense of what their specific property is worth at any given moment — until they need to know urgently, usually right before selling or refinancing.

The problem isn't a shortage of options. It's understanding which method suits your situation, how accurate each one actually is, and what the numbers mean in practice. A Brisbane homeowner in Ashgrove who gets a $1.1M figure from one source and $1.35M from another isn't imagining things — both numbers can be defensible depending on the methodology behind them.

Here are five ways to find out what your property is worth, with an honest assessment of each.

## 1. Free Online Suburb Estimates

**What it is:** Most property platforms — including PropertyLens, Domain, and REA — offer free suburb-level price estimates based on recent comparable sales, median price movements, and basic property attributes.

**Cost:** Free.

**Speed:** Instant.

**How accurate:** Useful as a starting point, but deliberately broad. A free suburb estimate typically gives you a price range anchored to the suburb median and recent sales activity. For a three-bedroom house in Keperra, it might return a range of $820,000–$950,000. That range reflects genuine market variance — not a failure of the tool.

The limitation is that suburb-level estimates don't know your specific property. They don't know whether your kitchen was renovated in 2023, whether you're on a 607sqm block or a 405sqm block, whether you back onto a busy road, or whether you've added a second bathroom. These factors can move the value by 10–20% in either direction.

**When to use it:** When you want a quick reality check before making any decisions. If you're idly curious about whether your Stafford Heights home has grown enough equity to fund a renovation, a free estimate gives you a ballpark in 30 seconds. It's also useful for tracking suburb-level trends over time.

**Limitation to understand:** Don't use a free suburb estimate as the basis for a selling price or a refinancing decision. It's orientation, not valuation.

PropertyLens offers free suburb-level estimates at [app.propertylens.au/estimate](https://app.propertylens.au/estimate) — no account required — covering suburbs across inner Brisbane within approximately 15km of the CBD.

## 2. Paid AI Property Predictions

**What it is:** A step up from free estimates, AI-powered property prediction reports analyse your specific address using multiple data layers: comparable sales of genuinely similar properties, feature-based modelling (block size, bedroom count, build era, land use), and AI-driven research that incorporates planning overlays, infrastructure proximity, flood risk, and recent market shifts.

**Cost:** Typically $20–$60 per report depending on the platform.

**Speed:** Minutes to hours.

**How accurate:** Significantly more precise than suburb-level estimates when the underlying data is strong. A well-constructed AI prediction for a house in Taringa will account for the fact that properties within 400m of the river command a premium, that 1960s brick homes on that street have been selling at a different rate to 1990s timber-and-tile, and that recent sales in the immediate street are more relevant than suburb-wide medians.

PropertyLens uses a three-layer prediction engine — comparable sales analysis, feature-based valuation, and AI-powered research — and tracks its prediction accuracy publicly at [app.propertylens.au/predictions](https://app.propertylens.au/predictions). That public accuracy tracking matters: it means the methodology is accountable rather than a black box.

For most Brisbane properties, a well-calibrated AI prediction should land within 5–8% of eventual sale price in stable market conditions. In rapidly moving markets or for unusual properties, the margin widens.

**When to use it:** When you're seriously considering selling or refinancing and want a data-grounded estimate before committing to agent appraisals or formal valuations. It's also useful for investors tracking a portfolio of properties — getting a formal valuation on every property every year is expensive; AI predictions provide a cost-effective interim check.

**Limitation to understand:** AI predictions are only as good as the data they're built on. In suburbs with low transaction volumes — some parts of outer Brisbane see fewer than 15 house sales per year — comparable sales data is thin, and predictions carry wider uncertainty bands. A good platform will tell you this rather than hide it.

## 3. Real Estate Agent Appraisals

**What it is:** A licensed real estate agent visits your property, inspects it in person, and provides a written or verbal opinion of its likely sale price based on their knowledge of recent comparable sales and current buyer demand.

**Cost:** Free. Agents provide appraisals at no charge because they're pitching for your listing.

**Speed:** Usually within a few days of requesting.

**How accurate:** Highly variable — and this is where homeowners need to be clear-eyed. Agent appraisals reflect two things simultaneously: the agent's genuine market knowledge, and their commercial incentive to win your listing.

The phenomenon known as "buying the listing" is real and well-documented in Australian real estate. An agent who quotes $1.4M when comparable sales suggest $1.2M is more likely to get the listing — and then manage your expectations downward once you're signed up. Queensland Fair Trading receives complaints about this practice regularly.

The best agents give honest appraisals backed by specific comparable sales data. Ask any agent to show you the three most recent comparable sales they're basing their estimate on. If they can't, or won't, that tells you something.

Agent appraisals also have genuine strengths. An experienced local agent in Paddington or Bardon will know things no algorithm captures: that the buyers currently active in the market are particularly interested in character homes with original VJ walls, that a specific street has a reputation among buyers, or that a development application nearby is affecting buyer sentiment. Local knowledge has real value.

**When to use it:** When you're within 3–6 months of selling. Get appraisals from at least three agents — not to average them, but to understand the reasoning behind each figure. An agent who can explain exactly why your Nundah townhouse is worth $780,000 rather than $720,000 is more useful than one who simply quotes the higher number.

**Limitation to understand:** An appraisal is not a valuation. It carries no professional liability. It's an opinion, and it's shaped by commercial incentives. Use it as one data point, not the only one.

## 4. Automated Valuation Models (AVMs)

**What it is:** AVMs are algorithmic valuations produced by specialist data companies — CoreLogic, PropTrack, and Valex are the main providers in Australia. Banks and mortgage brokers use AVMs extensively in their lending decisions. Unlike free suburb estimates, AVMs are calibrated to produce a single-point estimate rather than a range, and they're designed to meet lending industry standards.

**Cost:** Often free through your bank's online portal, or $30–$100 if purchased directly. Many lenders run an AVM automatically when you apply to refinance.

**Speed:** Instant.

**How accurate:** AVMs are generally more precise than free suburb estimates because they use richer data inputs and are regularly recalibrated against actual sale outcomes. CoreLogic's Hedonic Home Value Index, for instance, is built on a methodology that's been refined over decades. For standard residential properties in suburbs with good transaction volumes — think Chermside, Carindale, or Wynnum — AVMs perform reasonably well.

For unusual properties, AVMs struggle. A 1920s Queenslander on 810sqm in Red Hill that's been extensively renovated is genuinely difficult to model algorithmically. The AVM might return a figure that's 15% below what the market would actually pay, because it can't assess the quality of the renovation or the emotional premium buyers attach to character homes.

**When to use it:** When refinancing, your lender will almost certainly run an AVM as part of their assessment. Understanding what it's likely to return helps you anticipate whether you'll meet the loan-to-value ratio your lender requires. If your property is unusual, it's worth knowing that an AVM might undervalue it — and that you can request a full valuation instead.

**Limitation to understand:** AVMs are calibrated for lending risk management, not for setting a sale price. They tend to be conservative. Don't use an AVM figure as your asking price.

## 5. Formal Bank Valuations (Registered Valuer Reports)

**What it is:** A registered property valuer — someone holding a Certified Practising Valuer (CPV) designation — physically inspects your property and produces a formal written valuation report. This is the only method that carries professional liability. If the valuer gets it wrong, they're legally accountable.

**Cost:** $300–$700 for a standard residential property, more for complex properties or rural land.

**Speed:** Usually 3–7 business days.

**How accurate:** This is the gold standard for accuracy. A registered valuer inspects the property in person, assesses its condition, notes improvements and deficiencies, researches comparable sales with professional rigour, and produces a documented, defensible figure. Banks require formal valuations for large loans, complex properties, or when an AVM returns an uncertain result.

Formal valuations also tend to be conservative by design. Valuers are trained to assess "market value" — what a willing buyer would pay a willing seller in an arm's-length transaction — and they err toward caution because their professional reputation depends on not overvaluing properties that subsequently sell for less.

This conservatism can frustrate homeowners. A property in Bulimba that a skilled agent believes will sell for $1.6M might receive a formal valuation of $1.45M. Both figures can be correct in their own context: the valuation reflects defensible market evidence, while the agent's figure reflects current buyer competition and emotional demand.

**When to use it:** When refinancing and your lender requires it. When buying at auction and you need certainty before bidding. When settling an estate or a divorce. When disputing a council rates assessment. For any situation where you need a legally defensible, professionally accountable figure.

**Limitation to understand:** Formal valuations cost money and take time. They're not necessary for casual market monitoring. And because they're conservative, they're not a reliable guide to what you'd actually achieve at sale.

## How the Five Methods Compare

| Method | Cost | Speed | Accuracy | Best For |
|---|---|---|---|---|
| Free suburb estimate | Free | Instant | Broad range | Quick orientation |
| AI property prediction | $20–$60 | Minutes | Address-specific | Pre-sale research, portfolio tracking |
| Agent appraisal | Free | Days | Variable | Pre-sale planning |
| AVM | Free–$100 | Instant | Moderate | Refinancing check |
| Formal valuation | $300–$700 | Days | High (conservative) | Legal/lending requirement |

## Which Method Should You Use?

The honest answer is: use more than one.

If you're thinking about selling a house in Morningside in the next six months, a sensible approach is to start with a free suburb estimate to orient yourself, then purchase an AI prediction report to get an address-specific figure, then invite three agents to appraise the property. By the time you've done all three, you'll have a well-triangulated view of where the market sits — and you'll be able to identify immediately if any agent is quoting an outlier figure.

If you're refinancing, your lender will drive the process. They'll run an AVM first; if it supports the loan-to-value ratio you need, you're done. If it doesn't — or if your property is unusual — they'll order a formal valuation. Understanding this process in advance means you won't be surprised by the outcome.

The most common mistake Brisbane homeowners make is relying on a single data point — usually an agent appraisal — without cross-checking it against anything else. In a market where median house prices in inner-ring suburbs have moved significantly over the past three years, a figure that was accurate 18 months ago may be materially wrong today.

Property decisions are among the largest financial decisions most Australians make. Spending $40 on an AI prediction report before a $1.3M transaction is not a significant cost. Spending nothing and relying entirely on a free estimate — or a single agent's opinion — is a false economy.

PropertyLens covers 540,000+ addresses across Australia, with suburb analytics, AI-powered price predictions, and planning constraint data for inner Brisbane properties. Free suburb estimates are available at [app.propertylens.au/estimate](https://app.propertylens.au/estimate), and detailed prediction reports can be accessed through the platform for any indexed address.