Brighton Homes Review By ChatGPT

This post is part of our series where we ask ChatGPT to review a project builder's published specification and inclusions. The aim isn't to rank builders. It's to show you how to read a spec sheet critically, using a real one as the example.

AI makes mistakes. Where we think ChatGPT got something wrong or missed context, we've added a correction in [brackets], and at the end you'll find my own take.

The specification

This review is based on Brighton Homes' published Studio Collection specification brochure. Inclusions change over time, so check the current version with Brighton Homes before relying on anything here.

Method

We followed the method set out in the first post of this series: a master prompt, then a series of step-by-step prompts covering quality, language and the gap between marketing and the contract.

Check out our original post about this blog series here. Get the Master Prompt and try it yourself.

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What ChatGPT found: structure and compliance

Steel frame (Truecore steel). Steel framing is a compliant alternative to timber under the NCC. It's termite-proof, non-combustible and doesn't warp or twist. ChatGPT flagged thermal bridging as a consideration, since steel conducts heat far better than timber and needs proper insulation detailing.

Slab. The standard slab is designed for an S-class site. ChatGPT noted that higher-risk sites may need an upgrade to M or H class at extra cost, so buyers should read the soil report closely.

[Correction: ChatGPT described Class S as suitable for moderately reactive soils. Under AS 2870, Class S is slightly reactive. Class M is moderately reactive, and H1, H2 and E are progressively more reactive. If your soil test comes back M or worse, expect a slab cost increase.]

Termite protection. A Kordon barrier system to AS 3660.1 is included. ChatGPT rated this as well specified, with both a product and the relevant standard named.

Insulation. R1.5 batts to lightweight-clad external walls and R3.0 batts to ceilings, including outdoor living and garage. ChatGPT warned that more may be needed to meet the energy rating depending on the design, orientation and glazing.

[Correction: ChatGPT said "6 or 7 star". Under NCC 2022, which Queensland adopted from 1 May 2024, most new homes need 7 stars. The brochure didn't say how 7 stars is achieved, so ask what's needed for your design on your lot.]

Windows. Powder-coated aluminium with key locks. No glazing performance is stated, such as low-E glass or solar heat gain control.

Inclusions and fit-out

Kitchen: 20mm Caesarstone benchtop, 900mm freestanding cooker, externally ducted rangehood, soft-close cabinetry. Dishwasher and microwave are provision only, so the appliances aren't included.
Bathrooms: Caesarstone benchtops, semi-frameless screens and wall-mounted tapware. Waterproofing isn't described, though it must comply with AS 3740 and the NCC.
Flooring: tiles to living and entry, carpet to bedrooms and study.
Ceiling height: 2440mm standard, which is lower than the 2590mm or 2700mm many buyers now expect.
Air conditioning: 4-zone ducted reverse cycle, which ChatGPT rated as a strong inclusion at this price point, though the brand, size and energy rating aren't stated.
Solar: a 6.6kW system with EV charger and app monitoring under the SolarPay arrangement. Ownership transfers after 60 months rather than outright, so read the finance terms carefully.
Hot water: 250L electric storage. ChatGPT flagged this as inefficient unless it runs on off-peak power or a solar diverter, and suggested a heat pump would be better.

Site, contract and pricing

Earthworks: the base price allows for up to 500mm fall with 250mm cut and fill. Anything beyond that is a site cost, which ChatGPT called a common source of budget creep.
External: Colorbond roof, face brick to the front facade only, with cladding and a brick skirt to the sides and rear.
Price hold: 180 days fixed from deposit. If your land titles later than that, expect re-pricing.
Council: pricing applies to Brisbane City Council only.
Contract: HIA contract.

[Context: ChatGPT called the HIA contract "standard in QLD". HIA contracts are widely used, but the QBCC also publishes its own New Home Construction Contract. Whichever you're offered, read it carefully and consider independent advice.]

Gaps ChatGPT identified

Electrical: one batten holder per room, one double power point per habitable room and one TV point for single-storey homes. Downlights, fans, USB outlets and extra power points are likely upgrades.
Energy and site compliance: no mention of how 7-star NatHERS is achieved, bushfire (BAL) ratings or ventilation. These vary by site and plan.
Display upgrades: the brochure notes that display homes show upgrades, and "design specific" appears next to many features.
Selections: the colour and selections appointment comes after the initial contract stage, so upgrades chosen there can push the price up.

Language review

ChatGPT compared the brochure's wording with the precise, measurable language used in the NCC and Australian Standards. The brochure is written as marketing ("kick off your shoes", "your dream kitchen"), which is fine for a brochure but not for working out what you're actually buying.

The phrases it flagged:

"Must-have items that other builders call luxury items, are now standard." Not measurable or enforceable.
"Choose from a wide range of tiles." "Wide range" isn't defined. Desirable options may cost extra.
"Externally ducted exhaust fans (where required for NCC compliance)." Doesn't say which rooms. Don't assume every fan is ducted outside.
"Design specific." Used next to the walk-in pantry, sliding doors and microwave provision. You'll only know whether you get it by checking your plans.
"Tiling included to wet areas." No tile heights stated.
"Provision for dishwasher with single powerpoint." Is plumbing included, or just power?
"Fixed price for 180 days." What's covered by the fixed price: site works, upgrades, design changes?

It also gave credit where wording was precise: the R3.0 ceiling insulation, the termite barrier to AS 3660.1, QBCC insurance and QLeave fees, and the contour survey, soil test and engineered slab design.

Term/Clause	Issue
“Design specific”	Used as a catch-all escape clause.
“Wide range” / “Choice from 10+”	Vague. Lacks specificity.
“Where required for NCC compliance”	Passes on responsibility without clarification.
“Provision for...”	Leaves scope of actual inclusion undefined.
Promotional tone overall	May obscure technical or contractual limits.

Anthony's take

ChatGPT did a reasonable job of spotting vague wording. It made a basic error on slab classes and was out of date on star ratings, which is exactly why you shouldn't rely on AI output without checking it.

On the specification itself, the Studio Collection includes some items that other volume builders often charge extra for: a steel frame, a ducted air conditioning system and solar. The leaner areas are hot water, electrical allowances, glazing performance and site costs. None of that is unusual for a volume builder. It just means the base price is the start of the conversation, not the end.

The language issues are common across the industry. "Design specific", "provision for" and "wide range" all need pinning down before you sign, with any builder.

Questions to ask before you sign

Which "design specific" items are included in my plan? Can that list be attached to the contract?
What does my soil test say, and what slab class and cost does that mean?
How does my design achieve 7 stars, on my lot, facing the way it faces?
What glazing is included, and what are its performance figures?
What exactly does "provision for" include, power, plumbing or both?
What are the tile heights in each wet area?
What site costs are likely beyond the 500mm fall allowance?
What are the SolarPay terms, and what happens if I sell within 60 months?

Our C4 Asking the Right Questions checklist has many more.