A kitchen renovation is the most expensive room-by-room project in most NZ homes — and the one with the most opportunity to go wrong. The mistakes below are what NZ builders and renovators see repeatedly. Each one is avoidable with the right planning.
Mistake 1: Not Ordering Joinery Early Enough
This is the number one kitchen renovation disaster in NZ. Kitchen cabinetry (joinery) is custom-made to order. Lead times in 2026 range from 6–10 weeks from most suppliers — and some premium suppliers are 12–14 weeks.
What happens: You book your kitchen renovation to start in 4 weeks and only then order the joinery. The kitchen is demolished. There are no cabinets. You cook on a camping stove in the lounge for two months.
How to avoid it: Order joinery before demolition — ideally at least 8 weeks before your planned start date. Finalise your layout, take precise measurements, and order. The cabinets should arrive before demo day, not after. See our full Kitchen Renovation Planning guide.
Mistake 2: Changing the Layout Without Thinking Through the Plumbing
Moving the sink to a kitchen island or across the room sounds simple. It involves: moving drain waste (which requires gradient fall — typically 1:40), relocating water supply lines, potentially re-routing through floor or walls, and a plumber rescheduled to accommodate the move.
What happens: You decide mid-renovation to shift the sink to the island. The plumber investigates and discovers the floor joist spacing makes the drain run impossible without cutting joists. You either compromise on the layout or add significant structural cost.
How to avoid it: If you want a new layout, work with a kitchen designer or builder to confirm the plumbing is achievable before committing. A plumber's assessment costs $150–$300 and can save you $5,000 in change orders.
Mistake 3: Skipping the Work Triangle
The "work triangle" — the relationship between fridge, sink, and cooktop — is one of the most studied concepts in kitchen design. It's not a trend; it's ergonomics. Kitchens where these three points are too far apart, too close together, or blocked by walkways feel exhausting to cook in.
What happens: You copy an Instagram kitchen layout that looked great in the photo. But the fridge is on the opposite side of the room from the bench. Every time you prep food, you walk 3 metres to the fridge and back.
How to avoid it: Keep the perimeter of the work triangle between 3.5 and 6.5 metres. No major traffic path should cross the triangle. Test the layout at full scale — tape it out on the floor before the cabinetmaker finalises drawings.
Mistake 4: Under-Valuing Bench Space
NZ kitchens are often small, and homeowners frequently compromise on bench space to fit in a wider fridge, a larger island, or a breakfast bar. Then they find they have nowhere to put a chopping board that isn't next to the stove.
What happens: The kitchen looks beautiful. But there's 400mm of bench between the sink and the cooktop, and nowhere to prep food comfortably.
How to avoid it: Minimum usable bench run of 600mm next to the cooktop. Minimum 450mm next to the sink. An island that's 900–1200mm wide adds significant prep space and is often worth the floor space it takes.
Mistake 5: Going Cheap on the Benchtop
Engineered stone (Caesar Stone, Silestone, Essastone) and natural stone benchtops cost $500–$1,500+ per lineal metre installed. Laminate benchtops cost $150–$400 per lineal metre. The savings are real — but so are the compromises.
What happens: A laminate benchtop with a chip or a burn at the edge is very hard to repair invisibly. The join at a corner shows over time as the substrate swells with moisture. After 5 years it looks dated. In a kitchen you spent $25,000 on, the benchtop is what guests touch and comment on.
How to avoid it: Allocate enough budget for the benchtop material you actually want. If budget is the constraint, choose a less expensive cabinet finish (standard wrap rather than painted) and spend the savings on stone. The benchtop is the most visible surface in the room.
Mistake 6: Ignoring Ventilation
An underpowered rangehood is a quality-of-life problem that you live with every day. NZ kitchens — especially in modern tight-seal homes — need ventilation that actually works.
What happens: You install a $299 filter recirculation rangehood because it looked nice and didn't require ducting. Six months later, you have grease on the cabinetry, condensation on the windows, and cooking smells that linger for hours.
How to avoid it: A ducted rangehood (vented externally) performs significantly better than recirculating models. Minimum airflow for a domestic kitchen: 600 m³/hr; for a 900mm or larger cooktop, 900 m³/hr+. Ducting route should be planned at design stage — retrofitting can be difficult. Electrician and builder need to coordinate.
Mistake 7: Not Budgeting for the Services
Kitchen renovations always touch electrical, plumbing, and sometimes gas. These services are not in the cabinet installer's scope — they require separate licensed tradespeople, and they cost more than most homeowners budget for.
Typical kitchen services budget (for a standard NZ kitchen): - Plumber (move/reconnect sink, dishwasher): $600–$1,500 - Electrician (new circuits for oven, rangehood, lighting, additional power points): $1,500–$4,000 - Gas fitter (if converting to gas cooktop): $800–$2,500 including appliance connection
What happens: You have a $30,000 kitchen joinery and benchtop budget, get the cabinets in, and then discover you need another $5,000 in electrical and plumbing that wasn't in any of your quotes.
How to avoid it: Get separate quotes from a plumber and electrician at the design stage. Include their costs in your total budget from day one.
Mistake 8: Forgetting Lead Time on Appliances
Imported appliances (Fisher & Paykel, SMEG, Miele, AEG) often have 4–8 week lead times from NZ distributors. Some specific models are 10–12+ weeks.
What happens: Cabinetry is installed, benchtop is cut for the specified oven. The oven is backordered. You wait 6 weeks with an open hole in your bench and no cooking.
How to avoid it: Order appliances at the same time as joinery. Confirm lead times before finalising the cabinet layout (oven cavity dimensions, cooktop cutout sizes must match exact appliance models).
Mistake 9: Not Getting Consent When Required
Kitchen renovations often require building consent when they involve: moving or removing load-bearing walls, changing the layout significantly (moving drainage), adding a window, or structural changes. Many homeowners assume kitchens are internal work and don't require consent.
What happens: You remove what turns out to be a load-bearing wall without consent or an LBP. Three years later, you try to sell. Your solicitor's pre-sale checklist surfaces the unpermitted structural change. You need a building professional to assess and retrospectively sign off, which is expensive and may require opening walls.
How to avoid it: Before touching a wall, ask your builder if it's structural. Before moving drainage, ask if consent is required. Call your local council's duty planner for a free 10-minute phone assessment. See Building Work Without Consent NZ for what's exempt.
Mistake 10: Installing the Handles Last (and Getting Them Wrong)
Cabinet handles are one of the highest-touch elements in a kitchen — you grab them hundreds of times a day. They affect the whole feel of the space. Homeowners often treat them as an afterthought and order them cheap and fast.
What happens: You order handles online to save $400. They arrive with 128mm hole centres; your cabinetmaker pre-drilled at 160mm. You return the handles, reorder, wait two weeks.
How to avoid it: Choose handles before the cabinetmaker starts drilling. Confirm the hole centre measurements in writing. Factor handle projection into drawer clearance calculations (deep handles on corner cabinets can block adjacent doors).
Plan your kitchen renovation properly from the start: Kitchen Renovation Planning NZ — budget table, week-by-week timeline, and joinery lead time checklist.
Get quotes from kitchen renovation specialists: Post Your Job Free
Related: Order of Trades NZ | How to Get Tradie Quotes NZ | Building Work Without Consent NZ