ACT Owner-Builder Rules for Decks, Pergolas and Carports

Q: Do I need an ACT owner-builder licence to build a deck?

If you are acting as the owner-builder and your project requires an owner-builder licence under ACT legislation, you must obtain the appropriate licence before starting construction.

Q: Do decks and pergolas require building approval in the ACT?

Some decks and pergolas may be exempt from approval, while others require development approval, building approval, or both. Requirements depend on the size, location and design of the structure.

Q: Can I build a carport as an ACT owner-builder?

Yes. If you meet the ACT owner-builder eligibility requirements, obtain any required approvals and comply with applicable legislation, you can build a carport as an owner-builder.

Q: Are decks, pergolas and carports Class 10 structures?

In most cases, decks, pergolas and carports are classified as Class 10 non-habitable structures under the National Construction Code.

Q: Can an ACT owner-builder hire licensed trades?

Yes. Many ACT owner-builders engage licensed trades for specialised work while managing the overall project themselves. It is the owner-builder's responsibility to ensure all work complies with applicable laws and building standards.

Q: What should I do before building a deck, pergola or carport in the ACT?

Before starting work, check whether your project requires development approval or building approval, confirm you meet the ACT owner-builder requirements, plan your budget and timeline, and ensure you understand your legal responsibilities.

Stephanie Boyce

Jul 31

6 min read

A deck off the back of the house. A pergola over the patio. A carport beside the driveway. On paper these look like weekend projects — but in the ACT, each one sits at the crossroads of owner-builder licensing, planning approvals and building approvals. Get any one of those wrong and a "simple" structure can turn into a stop-work notice, an insurance gap, or a headache at resale.

This guide walks you through when you need an ACT owner-builder licence, whether your project is exempt from approval or needs to be lodged, and the compliance mistakes that catch people out most often on small structures like these.

Before you start, it's worth understanding what the owner-builder role actually involves and how owner-builder training fits into the licensing process — both are covered in more depth elsewhere on our site.

What ACT Owner-Builders Can Build

An ACT owner-builder licence covers more than just the house itself. It allows you to build or renovate a residence and the ancillary structures around it — decks, pergolas and carports among them — on land you own.

Under the Building Code, these ancillary structures are generally classified as Class 10 — the category for non-habitable structures such as carports, garages, pergolas, decks and retaining walls. That classification matters because it determines which pathway you need to qualify under, which we cover next.

For a broader look at what falls under each classification, our NCC 2025 guide for owner builders is a useful companion to this article, and our piece on owner-builder responsibilities covers what you can and can't build in more detail.

When You Need an ACT Owner-Builder Licence

If you intend to build or renovate — including ancillary structures — on land you own, and you'll be acting as the head contractor, you need an ACT owner-builder licence. There's no way around this for anything beyond the smallest exempt work (more on exemptions below).

For Class 10 structures specifically — your deck, pergola or carport — you need to meet one of these three pathways:

Demonstrate sufficient skills and experience to satisfactorily carry out the building work; or
Complete an owner-builder course within the last five years; or
Hold a recognised builder licence (Class A, B or C, or interstate equivalent).

Only individuals can apply for an owner-builder licence in the ACT — companies aren't eligible. And once issued, the licence runs for up to three years to complete the approved work.

If you're weighing up which pathway suits you, our guide to getting an ACT owner-builder licence walks through the process step by step, and our ACT owner-builder training page covers the course option in detail. If you're still deciding whether owner-building or hiring a licensed builder is the better fit for your project, we've also compared ACT builder licences against the owner-builder pathway.

Do You Need Planning or Building Approval?

Holding a licence is only half the equation. Before you build a deck, pergola or carport, you also need to check whether the project is exempt from Development Approval (DA), Building Approval (BA), or both.

ACT Planning provides a self-assessment for structures like these, and whether you're exempt comes down to factors like size, height, location on the block, and impact on neighbouring properties. Importantly, "exempt" doesn't mean "no rules apply" — even exempt structures must comply with structural, fire and safety standards, must not disturb asbestos, and can't interfere with easements or existing fire protection on the building.

As a rough guide:

Simple carports and pergolas that meet the exemption criteria may not need DA or BA — but you still need to comply with the underlying rules.
Larger or more complex decks, or structures near boundaries, will typically need building approval and possibly engineering input.

For a clear breakdown of what actually needs a licence to carry out, see what work needs a builder licence in the ACT. And before you lodge anything, run your project through our ACT Owner-Builder Checklist — it walks through the approval steps alongside trade coordination, so you're not discovering gaps halfway through.

Common Deck, Pergola and Carport Scenarios

A small timber deck off the back of the house. Whether this is exempt or needs building approval usually comes down to height off the ground, floor level, and span. Low, small, freestanding decks are more likely to be exempt; anything higher, larger, or closer to a boundary usually isn't. Run it through the ACT Owner-Builder Checklist before you start.

An attached pergola over an existing patio. Height, waterproofing and structural attachment all come into play here — and because it's attached to the house, it can affect the compliance of the main dwelling too. If you're securing a pergola to an existing structure, it's worth getting that connection checked by an engineer before you build. Our guide to owner-builder responsibilities on site covers what you're on the hook for once work starts.

A freestanding carport near the side boundary. Boundary setbacks and overshadowing are the two things that most often push a carport out of exemption and into requiring building approval. If you're at this stage, it's a good time to compare builder and trade quotes using our Owner-Builder Quote Comparison tool, so you know what a compliant build should actually cost.

If your project feels borderline on any of these, our ACT Owner-Builder FAQ is a fast way to check the details before you lodge approvals or engage trades.

Licence Limits, Frequency and Timing

A few limits are worth knowing upfront so they don't catch you out later:

Only individuals can apply, and you can't have held an owner-builder licence for other land in the previous five years.
There's no limit on the number of owner-builder licences you can hold for work on the same block of land.
Your licence is time-limited — up to three years — to complete the approved work.

For the full eligibility picture, see our guide on who can qualify for an ACT owner-builder licence.

Budget and Planning Tools

Once you know your project is licensed and approved correctly, the practical planning starts. Our budget planner is a good starting point, and our material calculators can help you scope decking boards, concrete footings and paving accurately before you order — see the calculator hub, or go straight to the tile, concrete, gravel or paint calculators directly.

To keep the whole project on track, our Owner-Builder Project Timeline and Owner-Builder Site Diary are built for exactly this kind of build — logging trades, inspections and milestones as you go.

Next Steps for ACT Owner-Builders

Decks, pergolas and carports may be small structures, but in the ACT they trigger real licence, approval and safety obligations — the same as any other build. Getting the licensing pathway and approval status right before you start is what keeps a simple weekend-sized project from turning into a compliance problem.

Before you lodge approvals or engage trades, run through our ACT Owner-Builder Checklist. If you're weighing up the course pathway, register your interest in our ACT owner-builder course and we'll be in touch as soon as it's ready. And if you'd like to swap notes with other owner-builders along the way, our Australian Owner Builder Community is a good place to ask questions as they come up.

ACT owner-builder rules for decks, pergolas and carports including licensing, planning approvals, building approvals and safety requirements.

Frequently Asked Questions

Do I need an ACT owner builder licence to build a deck? If you're acting as the owner builder and your project requires an owner-builder licence under ACT legislation, you'll need to obtain the appropriate licence before starting work.

Do decks and pergolas require building approval in the ACT? Some projects may be exempt, while others require development approval, building approval, or both. Requirements depend on the size, location and design of the structure.

Can I build a carport as an ACT owner builder? Yes, provided you meet the ACT owner builder eligibility requirements and obtain any approvals required before construction begins.

Are decks, pergolas and carports Class 10 structures? In most cases, yes. They are generally classified as Class 10 non-habitable structures under the National Construction Code.

Can an ACT owner-builder hire licensed trades? Yes. Many owner-builders engage licensed trades for specialised work while managing the overall project themselves.

What should I do before building a deck, pergola or carport in the ACT? Check whether your project requires development approval or building approval, confirm you meet the ACT owner-builder requirements, and plan your project before work begins.