What Size Shed Do I Need? NZ Shed Size Guide | KiwiSpan

What size shed do I need? A practical guide for Kiwi properties

Choosing a shed size sounds pretty simple.

Work out what needs to go inside, allow enough room for it and you’re sorted. Right?

Not quite.

One of the easiest mistakes to make when planning a shed is designing it around what you own today. A boat gets bigger. Another vehicle appears. The workshop slowly takes over. Before you know it, the shed that looked enormous on paper is suddenly feeling pretty full.

So before deciding on dimensions, it pays to think about what you actually want the shed to do.

Start with what you’re putting in it

Rather than starting with a shed size, start with a list.

What needs to live in there from day one?

For a lifestyle property that could be cars, a boat, bikes, tools and the ride-on mower. On a farm it might be tractors, implements, feed or machinery. A workshop will need another set of considerations again.

Once you’ve got the obvious things down, think about what tends to accumulate over time.

If you’ve ever owned a shed before, you’ll know empty space has a funny way of disappearing.

How much room do your vehicles actually need?

Getting a vehicle through the door is one thing. Being able to comfortably move around it is another.

Think beyond the physical dimensions of the vehicle. You’ll need enough clearance to open doors, walk around it and access whatever is stored nearby.

The same goes for boats, trailers, tractors and other machinery.

Door position matters too. If you’re regularly backing a trailer into the shed, the easiest route in and out could have just as much influence on the design as the size of the shed itself.

It’s worth thinking about this alongside the position of the building on your property. Good site planning can make better use of the available land and make day-to-day access easier.

Related KiwiSpan pages: Lifestyle & Residential Sheds | Garages

Planning a shed with a workshop?

This is where a little extra space goes a long way.

A workbench pushed against the wall doesn’t technically take up much room. The person standing at it does. So do the tools, materials and half-finished project that inevitably ends up beside it.

Think about what you’ll actually be doing in the workshop.

If it’s somewhere to keep a few tools and tackle the occasional weekend project, your needs will be very different from someone running a business from the shed.

You might need space for fixed benches, machinery, storage racks or vehicle access. Power points and lighting also become much more important once a shed is being used as a proper workspace.

Explore: KiwiSpan Storage Sheds & Workshops

What about a farm shed?

Farm sheds need to work hard.

The right size will depend on what you’re storing and how you need to access it. A shed for hay has very different requirements from one housing tractors and implements.

Start with the largest piece of machinery that needs to fit inside, then think about how it will get in and out.

Consider turning space, door height and width, internal clearance and whether multiple pieces of equipment need to be accessible at the same time.

You don’t want to move three things every time you need the tractor hiding at the back.

Some single-storey pole sheds and hay barns in rural zones can qualify for building consent exemptions when the relevant conditions are met and the required licensed professional is involved. See the official Building Performance guidance. Always check the requirements for your particular project.

Explore: KiwiSpan Farm Sheds | Farm Sheds & Barns | Farm Storage & Machinery Sheds

Don’t forget storage

Storage is usually the first thing sacrificed when a shed gets tight.

Allowing dedicated space for shelving, cupboards or racking can stop everything from slowly migrating onto the floor.

Think about the things that don’t necessarily come to mind when you’re sketching out the shed too. Garden equipment, camping gear, tools, spare parts, bikes and seasonal items all need somewhere to go.

Using wall height effectively can help, but make sure anything you need regularly is still easy to reach.

Think about your future shed, not just today’s

You don’t need to predict exactly what life will look like in ten years.

But you probably know whether there’s a chance you’ll buy another vehicle, upgrade the boat, add machinery or turn part of the shed into a workshop.

If the answer is yes, plan for it now.

A little extra space at the design stage can give you more flexibility later. It may also be worth considering whether the position and design of the shed would allow an extension in future.

This is where custom design starts to make sense. Rather than squeezing everything into a predetermined footprint, the building can be designed around what you actually need.

Want to test out the size and layout first? Try KiwiSpan’s 3D Shed Builder to start visualising your shed.

Does shed size affect building consent?

It can. Building Performance states that sheds greater than 30m² in floor area generally require building consent. There are exemptions for some smaller detached buildings up to 30m², but the conditions vary depending on the design, materials, use, location and professional involvement. Check the official Building Performance guidance before relying on an exemption.

For detached buildings between 10m² and 30m², different exemptions can apply to lightweight buildings, kitset or prefabricated buildings, and work carried out or supervised by a Licensed Building Practitioner. Read the detached building exemption guidance.

The Building Act setback conditions for some exempt single-storey detached buildings were also changed in October 2025. Read the 2025 Building Performance update. Local District Plan rules still need to be checked.

If you’re unsure, check with your local council or talk to your KiwiSpan team before getting too far into the design.

So, what size shed should you build?

There isn’t one perfect shed size.

And that’s kind of the point.

A good shed should be designed around your property, what you’re putting inside it and how you want to use it.

Start with the things that absolutely have to fit. Add the space you need to comfortably use them. Then give some thought to what might change over the next few years.

Chances are, you’ll be glad you did.

At KiwiSpan, every shed can be designed around the way you actually use it. Whether you’re planning a lifestyle shed, farm building, garage or workshop, your local KiwiSpan team can help turn that list of requirements into a shed that fits.

Because it’s much easier to find room for everything when you design the room for it in the first place.

Ready to start planning your shed? Design your shed in 3D or request a quote from your local KiwiSpan team.