House Rewire Cost in Derby: Full & Partial Prices (2026 Guide)

What a full rewire costs by house size

For a straightforward full rewire in Derby, expect roughly £2,800-£4,200 for a 2-bed terrace, £3,800-£5,800 for a 3-bed semi, and £5,500-£8,500 for a 4-bed detached, including a new consumer unit, sockets, switches and typical light fittings. These figures sit a touch under London or the South East, but materials (cable, consumer units, back boxes) are priced nationally, so most of the local saving comes from labour rates rather than parts.

Price swings mostly come down to access and construction, not floor area alone. A solid-floor Victorian terrace with no loft access above some rooms can cost more to rewire than a larger 1990s house with a boarded loft and suspended timber floors throughout, because chasing cable into solid walls and lifting floorboards takes far longer than running cable through joists. Always ask what's included — some quotes exclude making good (plastering over chased walls) or a new consumer unit, which can add £250-£450 on its own.

Get at least three quotes and make sure they're pricing the same spec: same number of circuits, same socket and light fitting allowance, and whether they include a new earthing and bonding upgrade if your house still has an old TT or unearthed system. A cheap quote that skips bonding to gas and water pipes isn't actually cheaper, it's just non-compliant, and a decent electrician will flag it rather than quietly leave it out.

When you only need a partial rewire

Not every property needs the whole house doing. If your EICR flags one dodgy circuit, a kitchen extension with no dedicated circuit, or old rubber-insulated cable in just the loft and one bedroom, a partial rewire in Derby typically runs £600-£1,800 depending on how many circuits and rooms are involved. It's the sensible middle ground when 70-80% of the house is on sound modern cable and only a section is the problem.

The catch is that partial work can uncover more than expected once the plasterboard's off or the floor's up. A single circuit that turns out to share a junction box with two others, or an old lighting circuit with no earth wired through it, can turn a two-day job into a week. A good electrician will price the known scope and flag a day rate (commonly £220-£320 in Derby) for anything extra they find, rather than a vague "we'll sort it and see".

Consumer unit swaps often get lumped in with partial rewires because old fuse boxes without RCD protection fail EICRs even when the cabling itself is fine. A standalone consumer unit upgrade in Derby usually costs £350-£600, and it's often the single most cost-effective fix if your report shows a C2 for lack of RCD protection rather than actual cable condition.

Understanding your EICR and what it means for cost

An Electrical Installation Condition Report grades issues C1 (danger present, immediate risk), C2 (potentially dangerous, urgent remedial work needed) or C3 (improvement recommended, not mandatory). Landlords in England must get any C1 or C2 fixed within 28 days to stay compliant; owner-occupiers aren't legally forced to act, but mortgage lenders and insurers increasingly ask to see a clean report. A fistful of C2s on an older Derby property is usually what tips someone from "maybe a partial fix" into "just rewire the whole thing".

Get the EICR done before you get rewire quotes, not after — it gives every electrician the same starting point and stops you paying twice for someone to diagnose what's already been diagnosed. Expect to pay roughly £120-£220 for an EICR on an average semi in Derby, and ask for the actual report with circuit-by-circuit findings, not just a pass/fail summary, so you can sanity-check any rewire quote against it.

If you're buying a house in Derby built before the 1980s and there's no EICR in the paperwork, factor rewire risk into your offer rather than being surprised later. Cable insulation from that era degrades with age regardless of how tidy the house looks, and old fusewire boards with no RCD protection are common right up into the 1990s in unmodernised properties.

NICEIC, disruption, and getting it done properly

Any rewire needs to be notified to Building Control under Part P of the Building Regulations, and the easiest way to handle that is to hire someone on the NICEIC or a similar competent person scheme (like NAPIT), who can self-certify the work instead of you paying for a separate council inspection. Always check the registration number against the NICEIC's public register rather than taking a company's word for it — it takes two minutes and confirms the certificate they hand you afterwards is actually worth something. Rank My Builder checks Gas Safe and NICEIC numbers against the public register for every trade before they get a badge, so if you post the job there you're starting from a shortlist that's already been checked rather than doing that legwork yourself.

Disruption is the part people underestimate. A full rewire generally means three to seven days depending on house size, floorboards up throughout, some chasing into walls for socket drops, dust in every room, and no reliable power for chunks of each day — most people either stay elsewhere for a few nights or plan carefully around it if they can't. Ask upfront how many electricians will be on site and whether they can do it in one continuous block rather than in and out over two or three weeks, since gaps tend to happen when a firm is juggling several jobs at once.

Making good is the bit that gets skipped or underquoted most often. Chasing cable into plastered walls leaves channels that need filling and skimming, and floorboards lifted for cable runs need refitting properly, not just dropped back loose. Get it written into the quote exactly who does the plastering and floor reinstatement — some electricians do basic filler-and-sand themselves, others expect you to bring in a plasterer, and that's an easy £300-£600 gap to miss until the invoice lands.

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