Methodology

We selected 40 suburbs across Perth's south and north corridors, covering premium waterfront suburbs (Dalkeith, Applecross, Cottesloe) through to growth-area suburbs (City Beach, Mount Lawley, North Perth). Suburbs are tiered:

• Premium (P0) — Established prestige suburbs, typically waterfront or river-adjacent
• Core (P10) — Solid residential suburbs with good infrastructure
• Growth (P1) — Inner-city or up-and-coming suburbs with strong momentum

We collected three categories of data:

• For-sale listings — Current listings from realestate.com.au across all 40 suburbs, including listed prices, land sizes, and property features
• Sold records — Historical sold data (April 2023 – October 2025) from public records, giving us 9,000+ transactions to compute suburb-level medians and trends
• Agent price guides — We emailed every listing agent asking for a price indication. This reveals the gap between advertised listings (often “Contact Agent”) and actual expected sale prices

Each agent receives a transparency score based on:

• Response Rate — Did they reply to our enquiry at all?
• Price Transparency — Of those who responded, how many provided a price guide or range?
• Response Time — How quickly did they respond (in hours)?

A transparency rate of 100% means the agent provided a price guide for every listing they responded to. We believe buyers deserve price guidance upfront rather than having to “register interest” before learning the expected price.

Each listing with a known price and land size receives a value score, calculated as:

value_score = (listing_$/m² − suburb_median_$/m²) ÷ suburb_median_$/m² × 100

A negative score means the listing is priced below the suburb's historical median on a per-square-metre basis (potentially undervalued). A positive score means above median.

Months of Supply (MoS) estimates how long it would take to clear current inventory at the recent sales rate:

MoS = current_listings ÷ (sold_last_12_months ÷ 12)

Lower values indicate a seller's market (high demand, tight supply). Values below 3 months are considered very tight. Above 6 months favours buyers.