Concrete Installation Cost NZ: Price by Project Type

Most residential concrete in New Zealand installs for somewhere between $80 and $250 per m², and the spread comes down to one thing: what the slab has to carry. A garden path and a driveway that parks a boat are the same concrete doing completely different work, at completely different prices.

Concrete installation cost moves with the project type more than with anything else, so this guide prices every common job side by side. That way you can budget the whole lot rather than one piece of it. All figures below are GST-inclusive unless marked `+ GST`, which matters because trade quotes are usually given plus GST and consumer quotes usually are not.

Those rates are for supply and lay on a reasonably straightforward site. They are GST-inclusive unless the row says otherwise, and they assume the ground is workable and a truck can get near it.

If you are holding a builder's quote, check the basis before you compare. Trade pricing is usually stated plus GST, so add 15% to it before putting it next to a number from this table.

Every figure here is general guidance based on current New Zealand market rates. The only number that means anything for your section is the one a contractor gives you after walking the site.

Driveways carry more variables than one row can hold, so if that is your project, our full concrete driveway cost breakdown works through the factors that push a quote up or down.

Rates per m² are useful for comparing. Totals are what you actually budget against. Here is what a realistic size of each job comes to.

You will notice a house slab is missing from that table. That is deliberate. A foundation is priced off an engineer's design and a geotechnical report, not off a square metre rate, and anyone quoting one without those documents is guessing.

Treat these totals as planning ranges rather than quotes. Access, ground conditions and spoil removal can move any of them, and all three are confirmed on a site visit.

For a free on-site quote anywhere in Auckland, call 09 977 9966.

This is the part most cost guides skip, and it is the reason two quotes for the same area can differ by thousands. Concrete is priced by what it has to do, and what it has to do sets the thickness, the mesh and the base underneath.

The NZ Master Concrete Placers Association Code of Practice for Concrete Placement of Domestic Driveways sets the baseline that a competent Auckland contractor works to:

• Slab thickness of 100 mm minimum, and thickness must reflect the use. Trucks and heavy vehicles need a designed slab for the additional loading (cl. 2.1)
• Concrete strength of 20 MPa or stronger (cl. 2.2)
• 100 mm of Gap 20 or similar, placed and consolidated, once soils, vegetation and weak material have been dug out (cl. 1.2)
• Fall of 1:100 minimum, which is 10 mm per metre (cl. 2.2, 3.3)
• 665 or 668 steel mesh, sheets overlapped and tied, sitting in the top third of the finished slab on chairs that suit the thickness (cl. 5.1–5.3)
• Control joints cut 24–48 hours after placing, at 3 m centres, to a quarter of the slab depth (cl. 5.1–5.2)
• Water curing for a minimum of four days (cl. 4.3)

Each of those items has a cost. A quote that skips the base depth or the mesh spec is not cheaper, it is just less complete.

Thickness by use

The 100 mm minimum in the code applies to domestic driveways. Pedestrian-only paths are commonly laid thinner, which is why a path prices below a driveway even though the concrete in the truck is identical.

That difference should be itemised. If you are parking a campervan on a slab specified at 100 mm, you are buying a driveway that will not last, and the saving disappears the first winter it cracks.

Does it need steel mesh?

Yes, and it is worth understanding what the mesh is actually for. Steel mesh does not increase the load capacity of a slab. It provides crack control. Thickness and the compacted base carry the load.

The code itself is refreshingly blunt about the limits of the material:

> "Concrete can crack. It is not possible to guarantee the absence of concrete cracking, regardless of processes and placing systems employed."

Colour, surface texture and flatness will vary across a pour, and the code states that these variances are not grounds for rejection. Colour swatches and samples are indicative only. Anyone promising a perfectly uniform, crack-free slab is promising something the standards body will not.

One more finish note worth knowing before you choose. Hard trowelling produces a smooth surface that is slippery outdoors in Auckland rain, which is why broom and sponge finishes exist for driveways, patios and paths.

The base under the slab

The groundwork is where the money goes and where failures start. Weak material comes out, 100 mm of compacted Gap 20 goes in, and the finished surface should sit within ±10 mm of the established datum, string lined in several directions.

The code is emphatic that all concrete must be vibrated, whether by immersion vibrator, vibrating screed or a float with a mini-vibrator. Poorly compacted concrete looks the same on day one and behaves differently in year three.

A quote that does not state a base depth cannot be compared to one that does. That single line is often the whole difference between two prices.

Look back at the table and you will see a 12 m² shed pad priced at $120–$160/m² while a 70 m² driveway prices closer to $90–$120/m². The concrete is the same. The overheads are not.

The same crew, truck, formwork setup and travel time gets spread across 12 m² instead of 70 m². Half-loads of concrete still attract a delivery charge from the plant. Most placers also carry a minimum charge, which typically applies to jobs under roughly 20 m² and sets a floor under the price no matter how small the area is.

The practical takeaway: if you have a shed pad, a bin pad and a strip of path to do, get them poured on the same visit. One mobilisation across three small jobs pulls the per-m² rate down noticeably.

This is also why a concrete backyard cost is rarely the sum of its parts. A patio, a path and a pad quoted separately will total more than the same three areas poured together on one day.

Base rates cover supply, lay and finish on a workable site. These items are usually priced separately:

• Earthworks and excavation, especially on sloped sections
• Spoil removal and disposal
• Difficult access, including long wheelbarrow runs or pump hire
• Drainage and stormwater connections
• Decorative finishes and sealing
• Vehicle crossing works and the approvals that go with them
• Reinstating lawn, garden and fencing afterwards

When three quotes for the same job differ by thousands, it is almost never greed. It is usually that one contractor has priced 150 mm of basecourse and spoil removal and another has priced neither.

Ask every quote to state, in writing: slab thickness in mm, concrete strength in MPa, mesh type and its position in the slab, base depth and material, whether spoil removal is included, the GST basis, and joint spacing. Once all three quotes state those seven things, they become comparable.

If your existing concrete is structurally sound and simply looks tired, an overlay is a genuine alternative to replacement. A basic overlay runs $30–$55/m², and a decorative overlay in Auckland typically sits at $70–$130/m². Against $90–$160/m² for a new plain driveway, that is roughly a third to two-thirds of the cost.

The catch is the word sound. If the slab has sunk, lifted at the joints, or has active structural cracking, an overlay covers the problem for a season and then telegraphs straight back through. Base failure and slab movement are not surface problems.

Our repair versus replacement guide walks through the decision properly if you are not sure which side of the line your driveway sits on.

Auckland rates sit above the national average for reasons that show up on almost every site.

Auckland clay holds water and moves seasonally, so base preparation here is deeper and more expensive than it would be on free-draining ground. Rainfall and the Auckland Unitary Plan's impervious surface provisions mean stormwater management often has to be designed into the job rather than added afterwards.

Then there is terrain and access. Steep sections across the North Shore, Titirangi and the Waitākere foothills add retaining and access cost before a single cubic metre is poured. Coastal exposure through the eastern bays and Whangaparāoa shortens the life of an unsealed decorative finish. Narrow isthmus sites in Ponsonby, Grey Lynn and Remuera often mean a pump instead of a chute, and pumping is always an added line item.

South Auckland sites around Papakura and Ōtāhuhu and western sites around Te Atatū each bring their own ground conditions, which is another reason a phone estimate is worth very little compared to a site visit.

Who approves what

This trips up more homeowners than anything else in concrete, and getting it wrong costs time.

Auckland Transport approves the vehicle crossing, which is the section of concrete between the kerb and your boundary. Written approval from Auckland Transport is required before any work starts to build, modify or repair one. Auckland Transport also handles the encroachment approval, the corridor access request and any temporary traffic management plan, and it assesses applications against Chapter E27 of the Auckland Unitary Plan.

Auckland Council administers the Auckland Unitary Plan itself, whose Chapter E27 covers vehicle access, and issues resource consent and building consent. Engineering Approval sits across both: it is assessed by Auckland Transport and approved by Auckland Council. One approval does not stand in for the other, and neither body will process the other's paperwork for you.

For the specifics, Auckland Transport's vehicle crossing application page and Auckland Council's driveways and access standards page are the authoritative starting points.

Measure the area in square metres, decide the thickness from how the surface will actually be used, then apply the relevant range from the table above. That gives you a budget figure good enough to plan around.

From there, get quotes itemised on the seven points listed earlier, and treat any quote that will not state a base depth or a slab thickness as incomplete. If a vehicle crossing is part of the job, start the Auckland Transport approval early, because it sits on the critical path ahead of the pour.

To talk through your project and get a free on-site quote anywhere in Auckland, call 09 977 9966.