Smoke alarm replacement in Sydney

Replacing a hardwired smoke alarm with a new one, then testing it.

Labour and fees

from $245.00

Parts extra, priced in your estimate

For one smoke alarm, including GST.

Two smoke alarms: from $275.00, parts extra.

This covers the contractor’s time for a standard job and Karua’s fee. Parts and consumables are added in your estimate, so you see the full price, parts included, before you book.

Get your estimate

What’s included

  • Isolate circuit and site setup
  • Remove existing alarm and disconnect wiring
  • Install new mounting bracket and connect new alarm
  • Test alarm functionality and clean work area

What changes the price

  • How many smoke alarms you need.
  • The parts and materials for your job.
  • Anything unusual about access or the work, which Karua asks about before pricing.

If the contractor finds extra work on the day, Karua prices it and nothing goes ahead without your approval.

How booking works

  1. Describe the job and see your estimate. There is no ringing around and no haggling.
  2. Book online. Karua places a hold on your card to confirm the job.
  3. Karua books a vetted contractor, licensed where the trade requires it.
  4. Payment is taken when you approve the work, or 12 hours after completion (at 8am if that falls overnight) if you don’t respond.

Other electrical jobs

See all prices

Prices checked 15 October 2026. Sydney's eastern and inner suburbs.

Consider it done.

Vetted contractors · Licensed where the trade requires it · Sydney's eastern and inner suburbs, and growing

Payment is taken when you approve the work,

or charged automatically 12 hours after completion (at 8am if that falls overnight).

© 2026 Karua Pty Ltd. Karua books work on its customers' behalf with independent contractors, licensed where the trade requires it.