Outdoor Power and Lighting Wiring: What Needs an Electrician vs DIY
Short answer: if it involves fixed wiring, it’s a job for a licensed electrician. That means a new outdoor power point, a hard-wired light on the pergola, a circuit out to the shed, or anything that connects back to your switchboard. What you can do yourself is the stuff that never touches that wiring: solar lights, plug-in low-voltage kits, planning the layout and keeping the gear you already have in good nick.
That line catches people out because a lot of outdoor electrical work looks simple. A power point is three wires and a faceplate. But outside, you’ve got water, soil, sun and garden tools all working against the cable, and a mistake doesn’t always show itself straight away. It can sit there until someone’s standing on wet grass holding the hedge trimmer.
Where the law draws the line
Every state and territory licenses electrical work, and the definitions are wider than most homeowners expect. Queensland’s Electrical Safety Office is a good example. Its Don’t Do It Yourself page lists installing a new power point, moving an existing one, swapping a light fitting and even replacing the plug on an extension lead as electrical work. It also makes the point that buying a hard-wired product is fine, but it has to be connected by a licensed electrician.
The details differ from state to state, so check with your own state’s electrical safety regulator if you’re unsure about a specific job. The safe working rule is the same everywhere though: if you’d need to open a switchboard, a junction box or a wall plate, put the screwdriver down.
What you can safely do yourself
There’s still plenty of the work that’s yours, and doing it well makes the sparky’s job quicker and cheaper.
- Solar lights: path lights, string lights and spike lights with their own panel and battery involve no connection to the house at all.
- Plug-in low-voltage kits: garden lighting kits sold with a transformer that plugs into an existing outdoor power point are made for homeowners to lay out. Follow the maker’s instructions for where the transformer goes.
- Planning: walk the yard at dusk and mark where you actually need light and power. Think about the barbecue, the pond pump, the shed and the path to the bin.
- Testing your safety switches: Queensland’s Electrical Safety Office suggests pressing the test button on each safety switch every three months, and its safety switch page walks you through it.
- Looking after leads: use outdoor-rated extension leads, keep them off the lawn when you mow, and bin any lead with a cracked sheath rather than taping it.
What needs a licensed electrician
This is the list where the licence isn’t optional, whatever the YouTube video says.
- New or relocated outdoor power points: including a weatherproof point for the barbecue area or a pump.
- Hard-wired lights: wall lights, downlights in a pergola or patio roof, and sensor floodlights that connect to house wiring.
- Power to a shed, studio or garage: this usually means a new circuit and underground cable, which is squarely licensed work.
- Hard-wired pool and spa equipment: any pump, chlorinator or heater that gets wired in rather than plugged into an existing point.
- Ceiling fans and heaters on the patio: anything fixed to the structure and wired in.
- Fault finding: if a safety switch keeps tripping or something gives you a tingle, that’s a call for a sparky, not a bit of trial and error.
If you’re putting in a gas or electric patio heater, our guide to patio heaters and outdoor heating covers which types need a trade to install.
Digging trenches for underground cable
Running power across the yard means trenching, and this is the bit where a homeowner can sometimes help. Some electricians are happy for you to dig the trench to save labour. Others would rather do it themselves. Either way, the electrician decides the depth, the conduit and the route, because the cable has to meet the wiring rules and they’re the one signing off on it.
Before anyone puts a shovel in the ground, lodge a free enquiry with Before You Dig Australia to see what’s already buried. A cable run straight through the spot where you might plant a tree or sink a clothesline post is a problem waiting for the next project. Our guide to choosing and siting a garden shed has more on planning a shed’s position before the power goes in.
The paperwork that proves it was done right
When a licensed electrician finishes a job, they should give you a compliance certificate for the work. In Victoria it’s called a Certificate of Electrical Safety, and Energy Safe Victoria says the electrician must give the customer a copy. Other states use different names for the same idea.
Keep it with your house documents. It’s your record of who did the work and when, which is handy if a question about that wiring ever comes up.
Briefing your sparky so the job goes smoothly
A clear brief saves a second visit:
- Mark every light and power point location with a stake or a dab of spray paint.
- Decide what each point is for, because a pond pump, a barbecue rotisserie and a phone charger have different needs.
- Ask whether your switchboard has room for a new circuit and whether all your circuits are on safety switches.
- Ask about sensors, timers or smart switches now, while the walls and trenches are open.
If you’re still working out the look you want, read our outdoor and garden lighting guide first, then bring that plan to the electrician. And if the power is mainly for an outdoor kitchen, the BBQ zone setup guide covers the power side, from plug-in gear to new fixed circuits.
Do the planning yourself, leave the wiring to the licence holder, and you’ll end up with an outdoor area that’s useful after dark and safe to stand in when the sprinklers have been on.
