The word turnkey appears in almost every granny flat builder’s marketing, and it carries a reasonable implication: you sign a contract, the builder handles everything, and you receive a completed, liveable dwelling at the end. What it doesn’t carry is a standardised definition of what everything actually means. One builder’s turnkey package includes appliances, air conditioning, floor coverings, and the compliance work required to obtain your Occupation Certificate. Another’s stops at lock-up stage and leaves the rest for you to arrange separately.
The price difference between two quotes is rarely the whole story. The inclusions difference almost always explains most of it. Understanding what a genuine turnkey package should cover, and what questions to ask before signing, is what separates a build that costs what it was quoted from one that accumulates additional costs across the project until the final bill looks nothing like the original number.
What Turnkey Should Mean for a Granny Flat
A true turnkey granny flat package covers every element of the build from site preparation through to a completed, professionally cleaned dwelling that’s ready for occupation the day you receive the keys. That means the structural work, the services connections, the internal and external finishes, the appliances, the compliance documentation, and the insurances and warranties that protect you after handover.
The structural and services scope is where the most significant variations between builders appear. Site works including surveying, electrical, water, sewer, and stormwater connections involve allowances rather than fixed costs, because the distance between existing services and the new dwelling varies between properties. A genuine turnkey package includes clearly defined provisional allowances for each of these connections, with the conditions under which those allowances apply and what happens when site conditions exceed them documented in the contract rather than discovered on site.
The structural package should include a concrete slab using high-strength concrete, an engineered foundation system appropriate to the site’s soil conditions, timber framing to Australian standards, termite protection with a warranty period, and waterproofing to wet areas. The roof, gutters, external cladding, windows, and doors should all be part of the standard package rather than quoted separately.
The compliance work required to obtain an Occupation Certificate is the element most commonly assumed to be included when it isn’t, or included with conditions that homeowners don’t notice until the end of the project. A genuine turnkey package manages all the documentation required for the OC, including the certificates from each trade, the building surveyor’s inspections, and the final submission to the certifier. You should receive a completed, certified dwelling rather than a building you then need to manage the compliance paperwork for yourself.
The Inclusions That Matter Most
The categories of inclusion that most directly affect the livability and total cost of a finished granny flat are the ones worth examining most carefully before signing, because they’re also the categories where builders most commonly apply allowances, selections from a range, or conditions that affect what you actually receive.
The kitchen is the inclusion with the most variation between packages. A genuine turnkey kitchen includes quality appliances with manufacturer warranties, stone benchtops, adequate cabinetry to a reasonable linear metreage, a splashback, a sink and mixer, a dishwasher provision, and rangehood ducting. Packages that list kitchen inclusion without specifying the appliance brands, benchtop material, or cabinetry lineal metres are packages where the finished kitchen may look quite different from what the marketing imagery suggested.
The bathroom should include floor-to-ceiling tiling from a builder’s range, a vanity, toilet suite, shower screen, shower head and mixer, towel rail, toilet roll holder, and an exhaust fan ducted to the outside. The laundry provision, typically within the bathroom for a standard granny flat, should include a tub, mixer tap, and power, water, and waste connection for a washer and dryer. These are functional necessities rather than upgrades, and their absence from the standard package creates costs that appear after signing.
Electrical inclusions should cover LED downlights across the dwelling, double power points in adequate numbers, hardwired smoke detectors, a TV antenna and point, an air conditioning unit with installation, and external lighting. Air conditioning is the electrical inclusion most often treated as an optional upgrade when it should be part of a liveable standard package. A granny flat without air conditioning in a Sydney summer is not a comfortable rental or family accommodation, and discovering it wasn’t included after signing is a frustration that a clear inclusions list prevents.
Floor coverings, painting, blinds, and built-in robes are the finishing inclusions that most affect how the finished dwelling feels to live in, and they’re also the inclusions where the specification matters as much as the presence. Hybrid flooring from a builder’s range in living and bedroom areas, tiled wet areas, internal walls painted in a quality finish, vertical or roller blinds to windows and sliding doors, and mirrored built-in robes to each bedroom are the standard that a liveable granny flat requires.
Understanding what’s included in every build before committing to a builder gives you the basis to compare quotes accurately rather than simply comparing the headline price, and to know that the number you sign is the number the build will cost rather than the starting point for a series of additions.
The Exclusions Most Builders Don’t Volunteer
The items most commonly left out of granny flat quotes without clear disclosure fall into predictable categories, and asking about each of them directly before signing is what confirms whether they’re part of the package or additional.
Demolition works are excluded from most standard packages, which matters for properties where an existing structure needs to be removed before the granny flat can be built. If your site has a shed, pergola, or other structure in the footprint of the new dwelling, confirming whether its removal is included or separately quoted is worth doing before the contract is signed.
Site conditions beyond what the standard package assumes are the source of most mid-project cost surprises. Standard packages typically assume clean soil for excavation and straightforward trenching for services connections. Rock, groundwater, charged sewer lines, and long service runs all exceed these assumptions and attract additional costs. Understanding what the package assumes and what triggers a variation is the question that prevents the most common budget surprises.
Fencing and landscaping are excluded from virtually every granny flat package and are worth confirming explicitly rather than assuming. The site at the end of construction will be in building condition rather than finished condition, and the work required to return the garden, fencing, and paths to their pre-construction state or better is a cost that belongs in the project budget even when it’s not part of the builder’s contract.
Upgraded fixtures and finishes are the category where the gap between the package and the finished result can be most significant if selections aren’t made carefully. Builders’ ranges are the standard, and selections outside those ranges attract upgrade costs. Understanding what the range covers and what it doesn’t before signing prevents the specific disappointment of expecting one quality level and receiving another.
Why the Inclusions Detail Is Worth Your Time Before Signing
The homeowners who look back on their granny flat build with the most satisfaction are almost always those who spent time on the inclusions detail before signing rather than focusing exclusively on the headline price. Not because the price doesn’t matter, but because the price only means something when you know what it includes.
A quote that’s $10,000 lower than a competitor’s may include $15,000 less in finishes, appliances, compliance work, and services connections. The lower headline number becomes the higher total cost once the exclusions are identified and the additional contracts are signed. The higher quote that genuinely covers everything produces a build that costs what it said it would and delivers a dwelling that’s ready to live in on handover day.
The contract is the document where all of this is resolved, and reviewing it with the inclusions detail in mind rather than signing on the basis of the marketing is what produces a build experience that matches what you were told it would be. Ask specifically about the items in this piece. Request the inclusions list in writing before you sign. Confirm what the standard ranges cover and what falls outside them. And make sure the compliance pathway to your Occupation Certificate is part of the package rather than something you’ll need to manage separately.
The time that takes before signing is considerably less than the time it takes to manage the costs, conversations, and disappointments that incomplete inclusions create after the contract is in place.
