DIY vs professional - the honest maths.
We are a building company telling you which parts of your kitchen to do yourself. That is not a trick - the parts worth DIYing are real, and the parts that go wrong are predictable. Here is what Victorian law allows, what DIY genuinely saves in 2026 dollars, and the three jobs that cost more to fix than to pay for properly.
The three things you cannot legally do yourself.
You can do a surprising amount of it yourself, and there are three things you absolutely cannot. Plumbing work must be done by a licensed plumber and comes with a Certificate of Compliance under AS/NZS 3500 - that includes the sink waste, the tap connection and the dishwasher water point. Electrical work must be done by a licensed A-grade electrician under AS/NZS 3000, which covers the oven circuit, the cooktop circuit, the dishwasher GPO and any new lighting. Gas work must be done by a licensed gasfitter under AS/NZS 5601, including capping off an old cooktop point. Everything else - demolition, painting, tiling, flat-pack cabinet assembly and install - is legally yours to do if you want it. What is legal and what is wise are different questions.
The compliance certificates are not bureaucratic decoration. They are the document your insurer asks for after a fire or a flood, and they are the document a conveyancer asks for when you sell. Work done by an unlicensed hand has no certificate, and there is no retrospective way to buy one - a licensed trade cannot certify work they did not do. That is the single most expensive misunderstanding in DIY renovation, and it surfaces years later at the worst possible moment.
Permits - usually not, sometimes yes.
A straight kitchen replacement inside an existing room, with no structural change, generally does not need a building permit in Cardinia Shire. The moment you remove a wall, alter a structural member or change the building's footprint, it does. Owner-builders removing what they believe is a non-load-bearing wall is a category of problem we get called to more than we would like, and roof trusses in the 1995 to 2015 Pakenham estate wave do not always load where intuition says they should. Our permits page covers where the line sits.
What DIY actually saves.
Less than most people expect, because the labour you can legally replace is the cheap labour. On a typical $26,000 same-layout Pakenham renovation, the materials, cabinetry, benchtop and appliances are roughly $18,000 and you pay near enough the same for them either way - trade accounts get us maybe 10% to 15% on cabinetry and appliances, which partly offsets the retail markup a DIYer avoids on nothing. The licensed trades you cannot skip are around $4,500 to $6,500. The genuinely DIY-able labour - demolition, painting, tiling, cabinet assembly and install - is about $4,000 to $7,000 of that quote. So a well-executed DIY saves roughly 15% to 25% of the total, not the 50% people imagine, and it costs you 6 to 10 weekends.
Worked example - Lakeside, 9 linear metres, same layout.
Our fixed-price quote on this job was $27,400 including GST: flat-pack-equivalent cabinetry $9,800; laminate benchtop at 9 linear metres and $440 per linear metre, $3,960; tiled splashback 5m² at $250, $1,250; mid-range appliance package $5,400; licensed plumber $2,100; licensed electrician $2,300; demolition, install, tiling and painting labour $2,590. The owner priced the DIY version at $19,100: same $19,160 of materials and appliances less about $1,300 of trade-account benefit we would have passed through, plus the $4,400 of licensed trades he still had to pay, minus the $2,590 of labour he did himself. Real saving: roughly $5,700, or 21%, for nine weekends.
He did it, and he did it well, and he told us afterwards it took him eleven weekends rather than nine and that he would pay the $5,700 next time. That is a completely reasonable outcome and we are not going to pretend otherwise - $5,700 is real money and some people genuinely enjoy the work. The point is only that the number is $5,700 and not $13,000, and knowing that before you start is the difference between a good decision and a resentful one. Full ranges are on our 2026 pricing guide.
Where DIY kitchens go wrong.
Cabinet levelling, by a very long way. If the base carcases are not dead level and dead plumb, everything downstream fails: drawer fronts will not align, doors will not sit flush, and the stonemason either refuses to template or templates a top that rocks. On a Pakenham slab-on-ground home the slab is rarely flat enough to just sit boxes on it, and getting a 9 linear metre run level across a 15mm fall is genuinely hard with a spirit level and patience. The second is benchtop cut-outs - a sink or cooktop cut-out done freehand into a laminate top chips the surface and cracks from the corner within a year if the corners are not radiused. The third is scribing to out-of-square walls, which almost no Pakenham house lacks.
The levelling problem compounds with local ground conditions. Most of the Cardinia growth corridor sits on reactive clay, commonly Class H1 under AS 2870, and the seasonal swell and shrink means the slab you are levelling against in February is not identical to the slab in August. Professionals handle that with adjustable legs and a laser level set to a datum, then scribe the kickboard to the floor rather than the cabinet to the floor. It is not secret knowledge, but it is the difference between a kitchen that looks bought and one that looks built in a driveway.
Stone is the hard stop.
One thing has moved firmly out of DIY reach since 1 July 2024, when Australia banned high-silica engineered stone after the silicosis crisis. Every stone benchtop still contains some silica - natural granite, porcelain and the compliant low-silica ranges all do - and WorkSafe Victoria requires wet cutting, HEPA-filtered extraction and P2 respiratory protection for silica-containing work. Cutting a sink hole in a stone top in your garage with an angle grinder is not a shortcut, it is a genuine health risk with a decades-long latency. Stone gets templated, fabricated and installed by a licensed fabricator, full stop. The detail is on our stone benchtop page. If you are DIYing, use laminate at $280 to $480 per linear metre - it is a sensible material and it is the one you can actually work.
The hybrid that actually works.
Yes, you can do part of the kitchen yourself and have us do the rest, and it is often the smartest arrangement. The split we recommend most is that you do demolition, painting and the final tiling, and we do design, cabinetry, install, benchtop and the licensed trades. Demolition is a solid weekend and saves roughly $800 to $1,500. Painting the room before cabinets land saves $1,200 to $2,000 and is genuinely low-risk work. That is $2,000 to $3,500 off a quote for two weekends of your time, with none of the risk sitting on the parts where a mistake is expensive. What we will not do is install a benchtop on carcases we did not level, or warrant cabinetry someone else assembled - not because we are precious, but because we cannot stand behind a result we did not control.
On the insurance question: if you are doing the work yourself on your own home, there is no builder to insure and no DBI. But there are two consequences worth knowing. First, if you sell within 6 years and 6 months of owner-builder work that required a building permit, Victorian law generally requires you to obtain an inspection report and warranty insurance before sale, which catches people out. Second, any individual trade contract you sign that exceeds $16,000 in Victoria brings DBI with it - so if you engage a cabinetmaker directly for a $19,000 supply-and-install, that contract needs DBI. Doing it yourself does not remove the regime, it just moves where it applies. Get advice from the VBA rather than from a forum.
If you want the middle path, our design service works standalone: we can lay out the kitchen, specify it properly, and hand you a set of drawings you build against. Plenty of capable people in Officer and Beaconsfield have done exactly that and ended up with a better result than either extreme.
FAQ.
Can I legally renovate my own kitchen in Victoria?
Mostly yes, with three exceptions. Plumbing must be done by a licensed plumber with a Certificate of Compliance under AS/NZS 3500. Electrical must be done by a licensed A-grade electrician under AS/NZS 3000. Gas must be done by a licensed gasfitter under AS/NZS 5601, including capping off an old cooktop point. Everything else - demolition, painting, tiling, cabinet assembly and install - is legally yours to do. What is legal and what is wise are different questions.
How much does DIY actually save on a Pakenham kitchen?
Less than most people expect, because the labour you can legally replace is the cheap labour. On a $26,000 same-layout renovation, materials and appliances are roughly $18,000 and cost near enough the same either way. The licensed trades you cannot skip are $4,500 to $6,500. The DIY-able labour is about $4,000 to $7,000. A well-executed DIY saves roughly 15% to 25% of the total, not the 50% people imagine, and it costs you 6 to 10 weekends.
What DIY kitchen jobs go wrong most often?
Cabinet levelling, by a long way. If the base carcases are not dead level and plumb, drawer fronts will not align, doors will not sit flush, and the stonemason templates a top that rocks. On a Pakenham slab-on-ground home the slab is rarely flat enough to just sit boxes on it. The second is benchtop cut-outs, which crack from the corner within a year if the corners are not radiused. The third is scribing to out-of-square walls.
Can I do part of the kitchen myself and have you do the rest?
Yes, and it is often the smartest arrangement. You do demolition, painting and final tiling; we do design, cabinetry, install, benchtop and the licensed trades. That is $2,000 to $3,500 off a quote for two weekends of your time, with none of the risk on the expensive parts. What we will not do is install a benchtop on carcases we did not level, or warrant cabinetry someone else assembled.
Do I need Domestic Building Insurance if I do it myself?
If you are doing the work yourself on your own home there is no builder to insure and no DBI. But if you sell within 6 years and 6 months of owner-builder work that required a building permit, Victorian law generally requires an inspection report and warranty insurance before sale. And any single trade contract over $16,000 brings DBI with it. Doing it yourself moves where the regime applies rather than removing it.
Areas we cover.
Design it with us, build it how you like.
Full build, hybrid split, or design-only drawings you build against. Free consultation across Pakenham, Cardinia Lakes, Officer, Heritage Springs and Beaconsfield.