How long does electrical work take?
A socket or switch swap is usually under an hour. A consumer unit replacement is typically a full day, often with the power off for several hours. A full rewire in an occupied property commonly takes 5 to 10 days depending on size and access, plus time afterwards for plastering and redecorating that isn't part of the electrical work itself.
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.
Rewiring a listed or period property
Listed building consent can be needed for chasing cable runs into original plaster or masonry, even though the electrical work itself is assessed the same way as any other property under Part P. Conduit and surface-mounted cabling are sometimes used instead of chasing into walls specifically to avoid this — worth discussing with an electrician who's worked on listed properties before.
Garage and workshop power
Running power to a detached garage or workshop means an armoured cable, usually buried, and its own consumer unit or sub-board with RCD protection at the supply end. If you're planning to run power tools or an EV charger from it, size the supply for that from the start — upgrading later usually means digging the cable run up again.
Electrical upgrades: EV chargers, solar PV & smart home systems
Beyond repairs, many electricians now fit EV charging points, solar PV inverters and battery storage, and smart home systems — app-controlled lighting, heating and security. These jobs usually need a separate circuit and, for EV chargers, a dedicated consumer unit way — worth checking your existing setup can support the extra load before booking.
Single phase vs three phase supply
Most UK homes run on a single-phase electricity supply, which is enough for typical household use. Larger properties, workshops, or homes adding multiple EV chargers or heavy machinery sometimes need a three-phase supply instead — this is arranged with the network operator, not just your electrician, and can take weeks.
How many quotes should you get?
Three is the usual recommendation — enough to spot an outlier (too cheap or too expensive) without asking so many tradespeople to survey your property that it wastes everyone's time. Make sure each quote is for the same scope of work, since a lower price sometimes just means less is included.
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.