Separate Electricity Meter for a Granny Flat: Australian Costs (2026)

A separate electricity meter for a granny flat needs a site-specific quote: a private sub-meter and a separately billed electricity connection are different jobs. Ask first whether the occupant needs an independent retailer account. That decision affects the connection application, equipment and ongoing administration, not just the price of the meter.

We have removed the old national installation ranges because we could not substantiate them. Use the metering estimator only as an illustrative allowance, then replace its assumptions with written electrical and retailer quotes.

Decide what the meter must do

A private sub-meter measures electricity used downstream of another connection. It doesn’t, by itself, create a separate retailer account. A separately registered connection involves the relevant network and metering arrangements, including a National Metering Identifier where applicable. Ask the retailer to explain which account and supply charge will attach to each dwelling.

Draw the proposed arrangement on the site plan. Mark the existing board, the flat, any solar installation and the intended cable route. If both homes share equipment, the electrician needs to know which circuits belong to each dwelling. Don’t assume that adding a second display separates every circuit or gives the tenant access to the main house’s solar credits.

The AER’s embedded-network guidance explains why buying electricity through a site owner differs from dealing directly with a retailer. State arrangements also matter; confirm which regulator covers the property.

What belongs in an installation quote?

Send each contractor the same brief. “Install a meter” leaves too much undefined: one quote might cover private wiring while another includes a service alteration and network coordination. Ask who takes responsibility for each step and who invoices it. That makes exclusions visible before you compare totals.

Ask for GST, quote expiry and variation rates to be explicit. Keep unknown excavation separate from confirmed work. A cheap hardware line doesn’t make the whole connection cheap, and a builder’s electrical allowance may stop at the dwelling rather than cover the run back to the existing house. Include that distinction in your whole-project cost breakdown.

NSW’s ASP scheme is not a national licence category

In NSW, the Accredited Service Provider scheme covers contestable network work. Level 2 accreditation concerns service lines between the distribution network and the connection point. The required accreditation and network authorisation depend on the work.

That doesn’t mean every Australian meter job requires a NSW Level 2 ASP, or that an ASP automatically handles the retailer’s metering appointment. Ask your electrician and network operator to identify the local process. Keep the names and reference numbers for the connection application, retailer request and installation booking together.

Before booking excavation, settle the route with the builder and locate existing services. Ask the contractor what can be prepared before the network appointment and what must wait. Use their programme rather than relying on a promised national two-to-six-week turnaround.

Check billing rules before collecting money

A sub-meter reading is not permission to charge a tenant whatever rate you choose. Where the National Energy Retail Law applies, selling energy generally requires authorisation or an applicable exemption. The AER retail-exemption guidance covers the different exemption categories and associated obligations.

Tenancy rules are another check. Give the proposed billing arrangement to your property manager or tenancy adviser before signing a lease. Ask about fixed supply charges, shared circuits, meter access and how a disputed reading would be handled. Family occupancy does not automatically settle these questions either.

Compare ongoing account charges as well as installation cost. Don’t claim a rental premium or a payback period without local evidence and a complete cash-flow calculation. The practical benefit you are evaluating is an arrangement the occupants understand and the relevant providers accept.

Frequently Asked Questions