If your house was built before 1950, the wiring may not be up to current standards. Prior to 1950, many wiring systems relied on rubber and lead and cloth-insulation, which deteriorate over time. Between the late 1800s to mid-1930s, wiring was held in place by metal conduit. You can find photos on the Internet. If you suspect that your house was wired before 1950 or has old style insulation ask a qualified electrician such as Electrician Perth to check it.
How much does a house rewire cost?
Of course, it depends on how much work a particular home needs and where you live. Your local electrician is the best bet as they are probably familiar with many different styles and ages of residences. An exact cost for a house rewiring in your suburb will depend on many different things. Any electrical company is only too happy to inspect the house and provide an obligation-free estimate.
How long does it take?
This depends on factors like the size of your home. In general, for an average size house, with a 2-3 person crew, a complete rewire, where all the wires are replaced, takes about 2-7 days.