A non-structural shed or garage slab in Auckland typically costs $110 to $130 per square metre for a 100mm to 150mm thick pad on a prepared base.

A structural slab, needed for a garage that's part of a habitable building or carries engineering requirements, usually adds at least 25% on top for perimeter thickening and extra reinforcing.

Shed and garage slab pricing at a glance

Large freshly poured concrete slab in a fenced Auckland backyard

Non-structural pad

$110 to $130 per square metre for a 100mm to 150mm slab on a prepared base, suitable for most standalone sheds.

Structural slab

Needed when the slab is part of a habitable structure or carries engineering requirements. Typically adds at least 25% for thickening and extra reinforcing.

Small slab example

A 20 square metre garage or shed pad typically costs $1,500 to $2,000 depending on site access and prep.

Site preparation

Excavation, levelling and compaction are usually the biggest cost variable, especially on a sloped or overgrown site.

Base thickness

Standard slabs run 100mm to 150mm; thicker slabs are needed for heavier structures or vehicle storage.

Slab Lab crew preparing and levelling the ground before a driveway pour

Structural vs non-structural: what's the difference

A non-structural pad simply supports the shed sitting on top of it. A structural slab is engineered to carry the building's actual loads, with perimeter thickening, specified reinforcing and often a producer statement. We assess which one your project needs before quoting.

Newly poured concrete driveway curving to a white villa during landscaping

Get a price for your shed or garage slab

Book a free, no-obligation on-site quote and we'll tell you whether you need a structural or non-structural slab, and what it'll cost.

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FAQ

How much does a shed slab cost in Auckland?

A non-structural shed slab typically costs $110 to $130 per square metre for a 100mm to 150mm thick pad on a prepared base. A 20 square metre pad usually runs $1,500 to $2,000 depending on site access and prep.

What's the difference between a structural and non-structural slab?

A non-structural pad just supports the weight of a standalone shed sitting on it. A structural slab is engineered to carry a building's actual structural loads, with perimeter thickening and extra reinforcing, and usually adds at least 25% to the cost.

Does a shed slab need building consent?

It depends on the shed's size and whether the slab is structural. Small, standalone sheds under a certain size are often exempt, but it's worth confirming with Auckland Council before you build, since exemptions depend on specific criteria.

How thick does a garage slab need to be?

Standard non-structural slabs run 100mm to 150mm thick. Garages built to carry vehicle loads or that are structurally part of the main building typically need a thicker, reinforced slab specified by an engineer.

What affects the cost of a shed slab most?

Site preparation, excavation, levelling and access are usually the biggest cost drivers, more than the slab thickness or finish itself. A flat, accessible site costs noticeably less to prepare than a sloped or overgrown one.

Rated 4.7/5 on Google Reviews

Customer reviews

“Zak and Shane were amazing. We had some shed flooring work needing done in a hurry and they were quick to assess the space and the final job was absolutely perfect. We will be using them again for sure!”

Ben G.

Google Review

“Zak and Shane were awesome. Everything was done professionally, on time and they stick to their quote. Easily one of the best experience I’ve had with tradespeople. I wouldn’t hesitate to call them for another job - and very happy to vouch for their work.”

Francis L

Google Review

“Zak and Shane did amazing and expectional job on my driveway concrete. Highly recommended and high quality workmanship. On time and friendly team. Good job SlabLab. 5 stars.”

Jason T.

Google Review

“If you need a concrete driveway look no further!! I highly recommend. From my initial enquiry right through to completing our driveway, Zak and the team were very professional and proficient. Communication was on point, pricing was very competitive, and most importantly, they did a great job. A++”

Danny R.

Google Review

“We needed the concrete path of our rental dug up and replaced and we found the guys did a great job and at a great price. Will be recommending them to our friends and family.”

Kim M.

Google Review

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