We only build
what the data
backs.

You carry that risk with your client. We built our process to take the guesswork out of it.

An example of the data steering us: we tested suburbs declared Priority Development Areas, the state’s fast-tracked growth zones, against similar nearby suburbs. Three years after the declaration, prices in the declared areas had grown more slowly, likely because of the extra supply. So a fast-tracked growth area isn’t automatically a buy for us. We look at how much new supply is coming.

Why this area, and the weak spots

That is why Southside scores 3/5, not a perfect 5. We’d rather show you the weak spots and our reasons than a perfect score. This is a scorecard, not a price forecast. Open any row below to see each figure with its source.

Key numbers at a glance

Sources: ABS, QGSO, RTA, SQM Research, REA, Onthehouse, Heatmaps, TMR, Gympie Regional Council. Figures as at Oct 2026. Rents are market figures, not a forecast return. Other sources put 4-bed rent at $660–$670/wk (REA 12m; RTA postcode 4570).

What we’re building, and why

Ducted air and 2.74 m ceilings are standard on Johnstone Rd. On top of that we add only what the data says earns its keep.

A country farmhouse style duplex. Tap the dots on the mockups to see each item’s value. Images are design mockups and renders, not photos. Final finishes may change.

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What each feature adds

Tap the dots on the mockups to see each item. Figures are per side. The tiles ($13k–$28k) range and the 900mm appliances (+5.1%, n=34, ~$17k conservative) come from measured sales data: Hedonic’s models of sold listings, comparing homes whose listings mention the feature with similar homes that don’t. For tiles the low end is the conservative reading and the high end the model’s central estimate. The vanity ($6k–$8k) is our own Tekna estimate. The mirror, tapware, checkerboard floor, polished concrete and skirting ranges are Tekna assumptions: modest figures we chose in proportion to cost, not measured from sales. Don’t add them up: the benefits overlap, because buyers pay for the finished home, not each item.

Cost of upgrade = extra over builder’s grade, from Tekna’s price book and retail prices, supply only, prices may exclude GST. Mirror ~$500, brass tapware ~$1.8k, polished concrete ~$5.7k (range $2.5k–$9k depending on finish) and checkerboard floor ~$200 come to ~$8.2k a side. Tiling both bathrooms floor to ceiling instead of standard height is ~$2.5k a side (~26 m² of extra wall tile and laying, plus cleaning and silicone; our estimate of the area from the plan). A floating vanity is ~$200 a side (Otti Bondi 1200 mm wall-hung vanity at The Blue Space sale price, against our standard vanity). 900mm appliances are ~$2.7k a side. Ducted air and 2.74 m ceilings are standard on Johnstone Rd and are not listed as upgrades. All eight optional items come to ~$13.6k a side. That is what they cost us, not added value, and it is not added to the estimates above or the measured +$30k.

Measured sales data, for comparison: homes listing two or more of these finishes sold for ~$30k more per side than similar homes without them (conservative, measured as one package, not stacked). End value is to be confirmed by valuation.

What a finished side should be worth

Smaller extras, each on its own

Don’t add these up. Each extra is worth ~2–4% on its own, but they overlap: homes with one tend to have the others, so a stacked total isn’t credible.

Caveats: model estimates from 781 Southside house sales (2015–2026), using listing text and photo analysis. Error on recent sales is ~10% (~$67k). The premiums are measured on houses, not duplexes. Photo-based parts are provisional until the fine-tuned model reruns. End value is to be confirmed by valuation.

We’ve bought the land and we’re building it ourselves

Our working target is ~$800k–$830k a side (Tekna estimate, not a model prediction), so $715k is deliberately conservative. Estimates from our feasibility model. Gross, before fees, duty, holding, selling and tax. End value is to be confirmed by valuation; there’s no bank valuation yet. Not a promise of returns.

Which upgrades pay

Pick the inclusions

Per side

Ducted airStandard

2.74 m ceilingsStandard

Cap on value lift+$30k · measured package ceiling

Inclusions (tick to add)

Upgrade cost added

$0

Per side

Value lift

$0

Per side

Net gain

$0

Lift less cost, per side. An estimate.

Lift per $1 of cost

–

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How it works: ticked items can lift value by up to the smaller of the low ends of their benefit ranges added together (tiles and 900mm appliances from measured sales data, vanity a Tekna estimate, the rest Tekna assumptions) or the measured +$30k package, so it stays conservative. Net gain is that lift less the upgrade cost. It is a guide to what is worth adding, not an end-value forecast.

We rank suburbs on their fundamentals. We don’t promise a sale price. Book a meeting.

Design renders and floor plans, shown for illustration. Not specific sites or addresses.