The same legal rule that applies to plumbing applies to electrical: wiring serving only one lot is the lot owner's; wiring serving more than one lot is common property. In townhouses, most internal electrical wiring sits with the lot owner. Common driveway lighting and any wiring servicing multiple lots is the owners corporation's.
What we're talking about
Electrical in a townhouse scheme generally covers:
- The mains supply from street into the scheme
- Individual switchboards inside each townhouse
- Power points, light switches and circuits within each lot
- Light fittings inside the lot and on external lot surfaces
- Smoke alarms
- Common driveway and external area lighting
- Garage door motors and openers
- Air conditioning power (see Air conditioning)
Typical position
Usually owner
- Individual lot switchboard and meters
- Wiring inside the lot serving only that lot
- Power points and light switches
- Light fittings inside the lot
- Smoke alarms inside the lot
- Hot water system wiring (within the lot)
- Appliances and their power leads
Usually OC
- Common driveway and pathway lighting
- Lights on external common walls or eaves
- Common-area switchboards
- Wiring servicing more than one lot
- Common-property fixtures (intercom, gate motor, fire panel)
- Earthing of common metalwork
Often grey
- External light on a common wall used only by one lot
- Hardwired smoke alarms in older townhouse builds
- Garage door motor (often a fitting โ varies by scheme)
- Sub-mains run through common ceilings or risers
- Switchboard upgrades or asbestos board replacement
โ Townhouse vs apartment electrical
Apartment buildings often have a substantial common electrical infrastructure: a main switchboard for the whole building, common circuits for lighting in corridors and stairwells, dedicated systems for lifts, pumps and fire safety, sub-mains running through risers to each unit.
Townhouse schemes are much simpler. Each townhouse usually has its own mains connection, its own switchboard, and its own circuits. The owners corporation typically only has electricity for the shared driveway lights, any common garden lighting, and (in some schemes) gate motors or intercoms.
The legal test, though, is the same: does this wiring serve more than one lot?
Grey areas and common disputes
Smoke alarms
NSW requires working smoke alarms in every residence. In a tenanted lot, the landlord (owner) has specific obligations under residential tenancy laws, including annual checks and battery replacement. For owner-occupied lots, the owner is responsible. The smoke alarm itself is inside the lot โ owner's responsibility. If the smoke alarm is part of a hardwired common-property fire safety system (rare in townhouses), it's OC.
Switchboard upgrades and asbestos boards
Many older townhouse schemes (pre-1990s) have switchboards with asbestos backing. Replacement isn't urgent for the asbestos itself โ undisturbed and intact, it's not dangerous โ but it does become an issue when an electrician needs to do any work. The switchboard inside a lot is the owner's responsibility. If the scheme has a common-property switchboard for shared services, that's the OC's. Some schemes coordinate switchboard upgrades across all lots to share costs โ this needs a special resolution and a clear agreement, since the work is technically inside each lot.
External lights on common walls
A wall light on the front of your townhouse, illuminating the path to your door, sits at the boundary between lot and common property. The fitting may be lot owner's (it serves only your lot); the wall it's mounted on is common property; the wiring may go either way depending on where it comes from. If it fails, the most practical answer is usually: the owner replaces the fitting like-for-like without changing wiring or position. Bigger changes need OC approval.
Garage door motors
See Doors. The door itself is often common property; the motor that drives it is often treated as a fitting and owner-maintained. This varies by scheme โ confirm with your strata manager before paying for a replacement motor.
Common driveway lighting
Lights along the common driveway, on common gardens, or attached to common external walls illuminating shared areas โ these are OC. If a bollard fails, if a globe blows on the common driveway light, it's the strata manager's call to organise replacement. Energy costs are paid from the administration fund.
Power outages and meter issues
If the power is out only in your townhouse, the issue is usually inside the lot or at your meter. If the whole scheme is dark, it's a common issue (or a wider network outage). When in doubt, check whether neighbours have power before calling an electrician.
The same s4 test
Section 4 of the Strata Schemes Management Act 2015 treats electrical wiring the same way as plumbing: wires or cables that serve more than one lot are common property, as are those inside walls or floors between a lot and common property. Wires serving only your townhouse are yours.
Sources
Strata Schemes Management Act 2015 (NSW), s4 (definition of common property โ applies to wires, cables, ducts and other equipment serving more than one lot) and s106 (strict duty).
Seiwa Pty Ltd v The Owners โ Strata Plan No 35042 [2006] NSWSC 1157 โ strict duty principle.
Residential Tenancies Act 2010 (NSW) and Residential Tenancies Regulation 2019 โ smoke alarm obligations in tenanted lots.