When does a consumer unit need replacing?
Older fuse boxes with rewireable fuses or plastic (rather than metal) casings don't meet current wiring regulations and are a common reason a rewire quote comes in higher than expected. A modern consumer unit uses RCBOs, which cut power to a single faulty circuit rather than the whole property.
Background checks and identity verification
Before comparing quotes, it's worth checking an electrician's identity and trading history, not just their qualifications — a registration number, a landline or verifiable business address, and reviews that reference specific jobs are all better signals than a mobile number alone.
Workmanship guarantees on electrical work
Registered electricians typically offer a workmanship guarantee separate from any manufacturer's warranty on parts like consumer units or EV chargers — usually 12 months upwards. Ask what's covered specifically: a guarantee on a rewire should cover the whole job, not just the final connection.
DIY electrical work vs when you need a professional
Under Part P of the Building Regulations, certain electrical work in a home is notifiable — it has to be carried out by a registered electrician who can self-certify it, or separately inspected by your council's building control. New circuits, consumer unit replacements, and any new work in a kitchen or bathroom are notifiable. Like-for-like socket or switch swaps usually aren't.
First fix and second fix, explained
On a rewire or new build, "first fix" is running cables through walls and floors before they're closed up; "second fix" is fitting sockets, switches and light fittings once decorating is done. Getting the timing right with other trades on site avoids cables being covered before they're tested.
Red flags in a cheap electrical quote
A quote significantly below the others is worth asking about before accepting — check it includes a proper consumer unit (not a budget one that doesn't meet current standards), covers making good afterwards, and includes the certificate you're entitled to for notifiable work. Cash-only, no fixed address, and no registration number are all worth asking about directly.
Electrical safety for landlords
Since 2020, landlords in England must have an EICR carried out every 5 years and provide a copy to tenants. Failing to do so can result in a fine of up to £30,000. If an EICR flags unsatisfactory work, it has to be fixed within 28 days or a shorter period the report specifies.
Understanding the labour vs materials split
Materials — consumer units, cabling, sockets, fittings — are usually a smaller share of an electrical quote than labour, particularly for jobs involving lifting floors or chasing walls. If a quote seems unusually cheap, check whether it's using a lower-spec consumer unit or cabling than a competing quote, not just a lower labour rate.