This depends on your location and the scope of work:

✅ DIY is generally acceptable when:
– You’re replacing an existing fixture on the same circuit
– You’re comfortable with basic electrical connections
– Your local code permits homeowner electrical work

❌ A licensed electrician is required when:
– You’re in the UK, Australia, or many Canadian provinces
(bathroom wiring is legally restricted)
– You’re adding a new circuit or moving a junction box
– You’re unsure about any part of the wiring process

When in doubt, hire a pro. The cost of a licensed electrician
for a simple mirror installation is typically $75–$150 —
far less than the cost of fixing a mistake in a wet zone.