Quick answer
Most NZ kitchen sink bowls measure about 450 x 400 mm. Pick the configuration by what you wash: a single large bowl takes oven trays flat, while 1.5 and double bowls trade tray space for a second task. Inset flat-rim suits laminate; undermount needs stone or solid surface. Singles fit a 600 mm base, most doubles need 900.
Key points
- The common NZ single bowl runs about 450 x 400 mm. Anything you wash weekly that is bigger than that decides your sink.
- With a dishwasher in the kitchen, one large bowl beats two small ones for almost every household. The dishwasher is your second bowl.
- Undermount sinks belong in stone or solid surface benchtops. Cutting one into raw laminate ends in a swollen edge unless a proper rim system is used.
- A single bowl sits happily on a 600 mm base cabinet; 1.5 and double configurations usually need a 900 mm sink base, which costs you a cabinet elsewhere.
- Thicker stainless with sound-deadening pads under the bowl is the difference between a sink and a drum. Check both before you buy.
The oven tray goes into the sink at forty-five degrees, one corner down, and gets scrubbed a quarter at a time while water runs off the high side. It has been washed that way for years, ever since someone chose a double-bowl sink with each bowl 100 mm too small for the tray.
That is the whole sink decision in one object. Bowl configuration gets chosen off looks and habit, single, 1.5, double, when it should be chosen off the largest thing you wash by hand every week.
Start with the oven tray, not the brochure
The common NZ single bowl measures roughly 450 x 400 mm and around 180 to 200 mm deep. That is the reference point every configuration gets judged against. Run the test tonight: pull out the biggest thing you wash by hand weekly, an oven tray, a roasting dish, the grill rack from the barbecue, and measure it. If its shorter side beats 400 mm, a standard bowl will never hold it flat, and a pair of standard bowls is two places it will not fit instead of one.
Bench depth caps the other direction. An NZ bench is 600 mm deep, and once you allow for the tap landing behind the sink and a workable rim at the front, the bowl's front-to-back measurement caps out around that 400 mm mark on most models. Length along the bench is where sinks genuinely differ, which is why the single-large bowl, 550 mm plus of unbroken length in some models, is the tray-washer's answer.
Single large vs 1.5 vs double: what each actually does
Each configuration is a bet on how you work. The single large bowl gives maximum unbroken washing space and takes trays flat. Add a half bowl and you keep most of that length while gaining a separate spot for rinsing, draining a pot, or scraping into while the main bowl is full; the double goes further and splits the run into two full wash-and-rinse stations, at the price of neither bowl taking a tray.
| Configuration | Oven tray flat? | Best for |
|---|---|---|
| Single large bowl | Yes | Dishwasher households, tray and pot washers |
| 1.5 bowl (main + half) | Usually, in the main bowl | Cooks who rinse and drain while washing |
| Double bowl | No, in either bowl | Hand-washing households, no dishwasher |
| 304 wet bench, integral bowl | Model dependent | Rentals, social housing, hard-wearing homes |
The half bowl on a 1.5 earns its keep more often than people expect: a colander of rice drains there while the main bowl soaks a pot, and the waste disposal, where fitted, usually lives in the half. The 1.75 is the same idea with a bigger half bowl, worth choosing when the small pot you drain most will not fit a standard half. The double bowl made complete sense when every dish in the house crossed the sink. In a kitchen with a dishwasher, it mostly divides one useful space into two compromised ones.
Do you need a double bowl if you have a dishwasher?
No, for most households. The dishwasher is your second bowl. It swallows the wash-and-rinse routine the double was designed for, which leaves the sink handling what the machine cannot: oven trays, stock pots, chopping boards, the sharp knives. Every one of those items wants length, and length is exactly what a double bowl gives up.
The honest exceptions. A household that hand-washes by conviction or has no dishwasher space still gets real value from two full bowls. And a busy cook who wants somewhere to tip pasta water while the main bowl holds suds lands well on a 1.5. What we push back on is the default double chosen because the old sink was a double; measure how you actually work before repeating it. While you are at the sink run, think about waste too, because the cabinet next door is the natural home for the bins, covered in bin drawer and recycling station design.
Inset or undermount: the benchtop decides
Mounting is not a style decision first, it is a materials decision. An inset (drop-in) sink with a flat rim sits on top of the benchtop with a bead of sealant under the rim, and it is the default on laminate because the rim shields the cut edge of the board. Undermount fixes under the benchtop for that clean wipe-straight-in edge, and it belongs in stone or solid surface, where the exposed cut edge is waterproof and polishable.
Undermounting into raw laminate is where sinks go wrong. The cut exposes bare particleboard millimetres from running water, and once the sealant line ages the board drinks, swells and lets the sink drop. Proper rim systems exist that make the combination workable, but the standard detail fails. The full mechanics are in undermount sinks and laminate benchtops. Whichever way you mount, the sealant joint is a maintenance item: check it yearly, and if you spot black staining or lifting, act on it early using the signs in water damage under the kitchen sink.
The cabinet behind the sink: 600 or 900
Every sink has to land inside a cabinet, and the cabinet is often the real constraint. A standard single bowl fits a 600 mm sink base, the default module. Most 1.5 and double configurations need a 900 mm base, and that extra 300 mm has to come from somewhere, usually the drawer stack or cupboard beside it. In a compact kitchen, upgrading the sink can quietly delete your best drawer bank.
Check three things against the cabinet before you buy. Overall sink length against the internal width of the base, clip clearance inside the cabinet sides, and what is left underneath once the waste and trap land, because the sink base also hosts the plumbing and often the dishwasher connections. Then think about the tap as part of the same decision: the mixer needs a punched or drilled tap hole in the right place, and swapping it later is a job in its own right, covered in kitchen mixer tap replacement.
Bowl configurations against the one test that matters: whether the weekly oven tray lies flat.
Stainless quality: gauge, sound pads and finish
Two sinks that look identical in the showroom can be a decade apart in service life. The first tell is gauge. Thicker stainless resists denting around the waste, flexes less under a full pot, and drums less when the tap hits it. Lift the sink if you can; the flimsy one announces itself. The second tell is on the underside: sound-deadening pads bonded under the bowl turn the tap-drum into a thud, and their absence is a reliable marker of a sink built to a price.
Finish is the third. Brushed or satin stainless hides the fine scratching that daily use puts into every sink; polished mirror finishes look sharp for a fortnight and then record every pot. For the bowl itself, 304-grade stainless is the standard worth asking for by name, the same grade specified for commercial and social-housing wet benches, because it shrugs off detergents and does not stain in normal service.
Drainer grooves, pressed drainers or a rack over the bowl
Something has to catch the drips, and there are three honest answers. A pressed stainless drainer beside the bowl, the classic inset format, is the most practical and the least fashionable; it earns its place wherever hand-washing is real. Drainer grooves machined into a stone benchtop do the same job more quietly, at fabrication cost, and they only work if they actually fall toward the bowl. A rack or folding mat over the bowl suits the minimal look and small kitchens, since the drying zone disappears when you lift it away.
Our steer: match the drainer to the dishwasher question. Dishwasher households drain so little by hand that a fold-away rack over a single large bowl covers it. Hand-washing households should take the pressed drainer and stop apologising for it.
The hard-wearing option: a 304 stainless wet bench
There is a configuration that skips the mounting debate entirely: the stainless wet bench, a 304 pressing where bowl and bench top are one piece of metal at the sink run. No rim, no sealant line between bowl and bench, no cut edge to swell, which is exactly why it is the standard at the sink run in social housing and why we build it into rentals and hard-working family kitchens on request. It reads utilitarian next to stone, and it outlasts everything around it. The case for it is made properly in stainless benches in social housing kitchens.
What we'd do
In a kitchen with a dishwasher, we fit a single large bowl, undermounted where the benchtop is stone or solid surface, inset flat-rim where it is laminate, on a 900 mm base where the run allows and a 600 base where it does not. Add the half bowl only if you genuinely rinse and drain while washing. Fit the double only in a hand-washing household. For rentals and the hardest-working family kitchens, the 304 wet bench is the quiet overachiever. That is the position, and the oven tray is the argument.
Before you price anything, do two measurements: the shorter side of the biggest thing you wash weekly, and the width of the base cabinet the sink must land in. Those two numbers eliminate most of the catalogue in five minutes. If you are planning a full kitchen, the designer on our site lets you set the sink base at 600 or 900 mm and watch what the rest of the run gives up, which settles the single-versus-double argument faster than any showroom visit.
Frequently asked questions
What is the standard kitchen sink size in NZ?
The common single bowl runs about 450 x 400 mm and roughly 180 to 200 mm deep, sized to suit a 600 mm deep benchtop. Overall sink dimensions vary with configuration: a single-large bowl model stretches past 550 mm of bowl length, while 1.5 and double configurations spread across more bench and usually need a 900 mm base cabinet underneath.
Is a single bowl or double bowl sink better?
With a dishwasher, a single large bowl is better for most households, because the machine replaces the rinse bowl and the sink's remaining job is trays, pots and boards that want unbroken length. A double bowl still earns its place in hand-washing households running a wash-and-rinse routine. Judge it by the biggest item you wash weekly.
Are 1.5 bowl sinks worth it?
Often, yes. The main bowl still takes an oven tray, and the half bowl gives a separate spot to rinse, drain a colander or scrape while the main bowl is in use. It also usually hosts the waste disposal where one is fitted. The cost is bench length and a 900 mm base cabinet in most cases. If you never rinse while washing, keep the single large bowl.
Can you put an undermount sink in a laminate benchtop?
Not with the standard detail. Undermounting exposes the cut edge of the particleboard core millimetres from running water, and when the sealant ages the board swells and the joint fails. Proper rim systems exist that manage the edge, but the default answer on laminate is an inset flat-rim sink, whose rim shields the cut edge. Undermounts belong in stone or solid surface.
What size sink fits a 600 mm cabinet?
A standard single bowl around 450 x 400 mm fits a 600 mm sink base, and compact single-large models are made specifically for it. Most 1.5 and double configurations need a 900 mm base. Check the sink's overall length against the cabinet's internal width, allow for mounting clips, and remember the waste, trap and often the dishwasher plumbing also live in that cabinet.
What should I look for in a stainless steel sink?
Three things: gauge, sound pads and finish. Thicker stainless resists denting and flexing, sound-deadening pads bonded under the bowl stop the drumming, and a brushed or satin finish hides the fine scratches every sink collects. Ask for 304-grade stainless by name, the same grade used on commercial and social-housing wet benches, and be suspicious of any sink that feels light.