Overhead To Underground Power Conversion Sydney
Converting exposed overhead supply lines into a safer, storm-resistant underground connection — from the street to your switchboard.
If a storm-damaged overhead line, a renovation, a new pool or driveway, or simply the look of exposed cabling across your property has you looking at going underground, High Demand Electrical designs and installs the full conversion.
We handle the trenching and civil works, the cable supply and termination, any distributor coordination the connection point requires, and the compliance sign-off at the end — as one job, not a handoff between trades.
If a storm-damaged overhead line, a renovation, a new pool or driveway, or simply the look of exposed cabling across your property has you looking at going underground, High Demand Electrical designs and installs the full conversion.
We handle the trenching and civil works, the cable supply and termination, any distributor coordination the connection point requires, and the compliance sign-off at the end — as one job, not a handoff between trades.
Rural Power Pole & Power Line Installation
AS/NZS 3000 & SIRNSW Requirements for Underground Supply
Underground cable installations are governed by AS/NZS 3000, which sets minimum burial depths, mechanical protection and marking requirements so the cable isn't damaged by future digging and is clearly identifiable if it ever needs to be located. Where the job touches the network connection, the Service and Installation Rules of NSW (SIRNSW) set out how that side of the work must be carried out.
If you're not sure which distributor services your property before applying for a change to your connection point, check your network area in seconds with our postcode checker rather than guessing.
If you're not sure which distributor services your property before applying for a change to your connection point, check your network area in seconds with our postcode checker rather than guessing.
Rural Power Pole & Power Line Installation
Why Homeowners and Businesses Convert Overhead To Underground
An overhead supply is cheaper to install originally, but it stays exposed to everything the property and the weather can throw at it for the rest of its life.
1
Storm & tree-fall risk
Overhead lines are the first thing to go down when a branch or tree falls in a storm.
2
Renovations & extensions
A second storey, a pool or a new driveway often can't go ahead with a line running through the build zone.
3
Streetscape & heritage
Some councils and heritage overlays actively prefer or require underground supply on a rebuild.
4
A cleaner property
No pole, no span, no cable running across the yard or the driveway sightline.
Once the supply is underground, it's no longer exposed to wind-blown branches, vehicle strikes or the general wear an overhead conductor takes over 20 or 30 years above ground.
Rural Power Pole & Power Line Installation
How High Demand Electrical Plans and Installs the Conversion
Site Assessment
We map the existing overhead run, plan the trench route to the switchboard or a new pillar, and check what the dig will cross — driveways, services, gardens and structures.
Distributor & Council Checks
Where the conversion changes the network connection point, we coordinate with Ausgrid or Endeavour Energy; where council approval applies to the civil works, we confirm that upfront too.
Trenching & Conduit
Trenching to the required depth, conduit laid to protect the cable, and warning tape and cover boards installed to AS/NZS 3000 depth and marking requirements.
Cable pull, Termination & Test
The new underground cable is pulled, terminated at both ends, tested, and the property switched over before the redundant overhead line is disconnected.
Rural Power Pole & Power Line Installation
Why This Can Sit Across Level 1 and Level 2 Accreditation
Level 2
Your Side of the Meter
If the conversion only changes the run from your existing point of connection to your switchboard, it's Level 2 electrical contractor work.
Level 1
The Network Connection Point
If the conversion changes how the property connects to the street network — a new underground service instead of an overhead one — that side is Level 1 accredited network work.
Plenty of conversions are Level 2 only, but the ones that also move the network connection point need both. HDE holds both accreditations, so we scope the job correctly from the start rather than discovering halfway through that a second contractor is needed.
Fully Licensed
Our Energy Providers
Authorised by Sydney's major networks
Related Services
Related Power Infrastructure Services
Underground Service Mains Installation
The underground supply side of this conversion, in detail.
Overhead Service Mains Installation
For comparison, or if overhead is what your property actually needs.
Underground Civil Works
The trenching and reinstatement work behind every underground conversion.
Power Pole Relocation
When the pole needs to move rather than disappear entirely.
Electrical Storm Damage
Repairs when an overhead line comes down before a planned conversion.
Defect Notice Rectification
Clearing issues that stop a distributor approving a changed connection point.
Rural Power Pole & Power Line Installation
What’s Included in a Rural Power Pole and Line Installation
Site Assessment & Design
Trench route, cable sizing and clearance planning before anything is quoted.
Distributor & Council Coordination
Where the connection point or civil works require it.
Trenching & Civil Works
Dug and reinstated to the depths and clearances AS/NZS 3000 sets out.
Cable Supply & Installation
Direct-buried or conduit XLPE cable, sized for the property's load.
Termination & Switchover
Connecting the new underground supply and safely decommissioning the overhead run.
Testing & Compliance
Full testing and a Certificate of Compliance for Electrical Work on completion.
Reinstatement
Making good the trench line — turf, paving or driveway surface, as agreed upfront.
Rural Power Pole & Power Line Installation
Why High Demand Electrical
High Demand Electrical is a Level 2 ASP accredited electrical contractor (EC Licence 397193C), certified to the ISO 9001, ISO 45001 and ISO 14001 standards. We plan the trench route, supply and terminate the cable, and handle any distributor coordination the connection point requires — so an overhead to underground conversion is one quoted job, not three separate quotes from three separate trades.
We service homes and businesses across Sydney, and every conversion starts with a proper site assessment rather than a price over the phone, since trench length, ground conditions and what the dig needs to cross all change the scope.
We service homes and businesses across Sydney, and every conversion starts with a proper site assessment rather than a price over the phone, since trench length, ground conditions and what the dig needs to cross all change the scope.
Frequently Asked Questions
FAQs
Why would I convert an overhead power supply to underground?
The most common reasons are storm and tree-fall reliability, clearing the line for a renovation, extension, pool or new driveway, streetscape or heritage requirements, and simply not wanting exposed cabling running across the property.
Is an overhead to underground conversion Level 1 or Level 2 work?
It can be both. If the conversion only affects the run from your point of connection to your switchboard, it's Level 2 work. If it changes how the property connects to the street network, the network-side portion is Level 1 accredited work. HDE holds both accreditations.
Do I need council approval to convert overhead power to underground?
It depends on the council, the property and whether the trenching crosses a nature strip, driveway or heritage-listed area. We check this as part of the site assessment so it's factored into the plan and timeline from the start.
Can High Demand Electrical replace an old or storm damaged rural pole?
Yes, replacement and repair work is common on rural properties, particularly after storms bring down trees or branches onto an existing line. Our team assesses the damage, confirms whether the pole or just the line needs replacing, and can usually turn around emergency repairs quickly. See our electrical storm damage page for how that process works.
How long does an overhead to underground conversion take?
A straightforward residential conversion on your own side of the meter is often a one to two day job once approvals are in place. A conversion that also changes the network connection point takes longer, since it depends on distributor approval timeframes.
What happens to the old overhead pole and wires?
Once the underground supply is tested and connected, the redundant overhead conductor and any pole that's no longer needed are removed or made safe as part of the same job, in coordination with the network distributor where network assets are involved. See our power pole relocation page if the pole needs to move rather than come out entirely.
Ready To Take Your Supply Underground?
Every conversion starts with a proper site assessment before we confirm scope or pricing — trench length and what it needs to cross change the job more than anything else.
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Powering Your Needs with Expertise
If you’re looking for a reliable, experienced, and prompt electrician, look no further than High Demand Electrical. We cater to all your electrical needs, from routine maintenance to emergency repairs and complete system installations. Our skilled team is committed to providing professional service that ensures your electrical systems run smoothly. Whether it's a small task or a large project, give us a call today. Let us meet all your electrical demands with the quality and reliability you deserve.
