Market Intel · 28 August 2026 · 4 min read
Thornlie vs Comboyne vs Deception Bay: 3 suburbs that fell
Thornlie, Comboyne and Deception Bay were all 90-something suburbs not long ago. Ripehouse Advisory breaks down why each fell, and what the data says now.
▶ Watch the full video on YouTube: Thornlie vs Comboyne vs Deception Bay: One Scores 58/100
One of these three suburbs was a perfect 99 three months in a row. Another printed its all-time high price and all-time high rent in the same month. The winner tonight scores 58. That is the point: in property investment, the headline price move is only one part of the story.
The real question is whether price, rent, vacancy and supply are moving together. In this Suburb Showdown, the data shows three very different ways to fall.
Why the R-Score matters more than the headline price
Ripehouse Advisory looks at suburb performance across four layers:
- macro
- LGA
- suburb fundamentals
- street-level data
Most investors stop too early. The money is often in the last layer, where two houses only 800 metres apart can tell different stories.
Tonight’s three suburbs all sat in the 90s not long ago. Now they’ve rolled over in different ways, and the R-Score is showing where the pressure is building.
Thornlie: the price raced ahead of the rent
Thornlie, Western Australia 6108, was the most-followed suburb on Picki that Ripehouse Advisory had never rated. It sat at 94 in September last year. Tonight it scores 34.
The suburb’s median house price printed an all-time high of $925,000 in July, up 30.3% year on year. That is the strongest price growth on tonight’s card. But the rent has not kept pace.
Key numbers in Thornlie:
- median house price: $925,000
- yield: 4.22%
- vacancy: 1.2%
- days on market: 11
- owner occupied: 69%
- investor holdings: 16%
- sales in 12 months: 288
The issue is simple arithmetic. Price is up 32% over 22 months, while rent is up only 10%. Yield has fallen for 11 of the last 12 months, dropping from 5.05% in October 2024 to 4.22% tonight.
Street level, the higher-priced family stock sits around Thornlie Square and the newer southern estates. The better yields are in the older brick-and-tile stock north of Spencer Road, closer to the station. But even there, the yield story is drifting the wrong way.
Comboyne: a thin market where the rent did all the talking
Comboyne, New South Wales 2444, is a very thin market: just 391 addresses across 100 square kilometres. It has been the thinnest market aired on the show so far.
That thinness matters. The median house price is $650,000, but it is based on just three sales in 12 months. In a market that shallow, the median can be swung by a single transaction.
The clearer signal is on the rent side:
- rent: $450 per week
- down 25% from the $600 peak
- vacancy: 2.8%
- days on market: 55
- owner occupied: 59%
Comboyne’s R-Score was a perfect 99 for three months in a row in early 2024. Then it broke. It fell to 52 in November and had a floor of 45 in June. Tonight it is 54.
Why the recovery? Because the rent has stopped falling. It sat at $450 for two months, and the score moved up nine points in the same month. In a thin market, that sort of rent stabilisation matters more than the noise around the median.
This is not a yield market. It is an owner-occupier and lifestyle market in hinterland country, where one sale can distort the picture.
Deception Bay: the lowest winning score we’ve aired
Deception Bay, Queensland 4508, wins tonight with a score of 58 — the lowest winning score Ripehouse Advisory has aired.
It sits on the northern shore of Moreton Bay, about 35 kilometres from the Brisbane CBD, and it is the only suburb on tonight’s card where the rent is rising.
The council backdrop is strong, but the supply backdrop is the real issue. Moreton Bay Regional Council has:
- supply in the 8th percentile
- 33.92 approvals per 1,000 dwellings
- 5,664 new dwellings approved in 12 months against 167,000 existing
- population growth of 11.7% over five years
- council R-Score of 92/100
That is a serious building pipeline, and it flows directly into Deception Bay because it is one of the cheapest entry points in the corridor.
Deception Bay’s key numbers:
- median house price: $910,000
- all-time high: $912,000
- year-on-year growth: 18.2%
- yield: 3.6%
- vacancy: 1.5%
- days on market: 12
- owner occupied: 50%
- sales in 12 months: 236
- median household income: $1,111 per week
- social housing: 5.8%
The asking-price story is just as important. In March, sellers were asking $1.15 million. Tonight they’re asking $899,000, which is $251,000 of cuts in four months and now below what buyers are paying.
The rent has also turned back up:
- peak rent: $645 in August
- down to $600 by January
- then back to $610, $620, $625, $630 over five straight months
That recovery is why Deception Bay scores higher than Thornlie, even with heavy supply. The rent is moving in the right direction.
Three different ways to fall
These suburbs were all 90-something not long ago, but the reasons they fell are different:
- Thornlie: price ran ahead of rent
- Comboyne: rent fell hard in a very thin market
- Deception Bay: supply pressure is heavy, but rent is recovering
The investor takeaway is not “avoid the market”. It’s that the same suburb can behave very differently depending on price, rent, supply and street-level stock.
The Ripehouse Advisory take
If you are buying in today’s market, the lesson is to look beyond the headline and into the relationship between price and rent. Thornlie shows what happens when price outruns rent. Comboyne shows how fragile a thin market can be. Deception Bay shows why supply needs to be checked before you chase growth.
That is exactly why professional research matters: the real story is usually buried in the data.
Download our no-cost Top Five Markets Report 2026 → https://ripe.house/showdown-ep31
If you are weighing suburbs like these, the real question is whether price, rent and supply are moving in sync, and the webinar can show how to test that before you buy.
Frequently asked questions
Why did Thornlie’s score fall even though its house price hit an all-time high?
Thornlie’s price rose much faster than its rent. The suburb’s median house price reached $925,000, but rent only rose 10% and yield fell from 5.05% to 4.22% over 11 of the last 12 months.
What makes Comboyne a risky suburb to read from the median price alone?
Comboyne is a very thin market, with just 391 addresses across 100 square kilometres and only three sales in 12 months. In a market that shallow, one transaction can move the median price and distort the picture.
Why did Comboyne’s score recover after falling from a 99?
The rent stopped falling and held at $450 per week for two months. In this thin market, that rent stabilisation mattered more than the noise around the median price, lifting the score by nine points.
What is the main issue behind Deception Bay’s lower score?
Deception Bay is being weighed down by heavy supply pressure in the Moreton Bay Regional Council area. The council has a strong building pipeline, with 5,664 new dwellings approved in 12 months against 167,000 existing dwellings.
What should an investor check before buying in suburbs like these?
The article says to look beyond the headline price and check how price, rent, vacancy and supply are moving together. It also highlights street-level data, because two houses only 800 metres apart can tell different stories.
General information only. It does not take your objectives, financial situation or needs into account, and nothing here is legal, financial, taxation or investment advice specific to your circumstances.
