Most Canberra plumbers price the same way: a call-out fee to get someone to your door, then either an hourly rate or a fixed quote depending on the job.
Call-out fees cover travel and the first period on site. Some plumbers waive the fee if you proceed with the work, some do not. Ask which before you book, because it is the most common source of surprise on a small job.
Hourly rates apply to diagnostic and maintenance work where nobody knows the scope until the wall is open. Leaking taps, running toilets and tracing a damp patch usually fall here.
Fixed quotes apply where the scope is knowable in advance. Hot water system replacement, fixture installation and most renovation plumbing should be quoted in writing before work starts, not billed by the hour.
After-hours work costs more. Evening, weekend and public holiday callouts attract a premium, and emergency response outside business hours is the most expensive way to buy plumbing. If a problem can safely wait until Monday, waiting is cheaper.
Two things reduce your cost regardless of who you hire. Get the quote in writing, itemised into labour and materials. And be specific when you call: “the hot water system is nine years old and making a knocking sound” gets you a plumber carrying the right parts, while “no hot water” gets you a second visit.