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£350–£2,500: Consumer Unit Upgrade Cost for UK Landlords & Homeowners

September 2, 2026
£350–£2,500: Consumer Unit Upgrade Cost for UK Landlords & Homeowners

Most homeowners pay within a few hundred to over a thousand pounds for a straightforward consumer unit upgrade in 2026, though complex or high-integrity jobs can be significantly more expensive. That figure normally covers the new unit, labour, testing, an Electrical Installation Certificate, and Part P notification. If your existing wiring needs remedial work first, or you need a three-phase or earthing upgrade, expect the bill to climb well beyond that range.

TL;DR:

  • The cost of upgrading a consumer unit typically ranges from about £350 for a basic swap to over £1,200 for more complex installations, depending on property size and features.
  • Labour costs vary regionally, with London and the South East charging higher rates, and remedial work can significantly increase the total bill if existing wiring is unsafe.
  • Inclusion of materials, certification, notification, and testing usually makes up the bulk of the price, but extras like earthing upgrades or relocating the unit can add to costs.
  • A straightforward upgrade generally takes four to eight hours, but repairs or unsafe wiring found during work can extend or complicate the process.
  • Landlords and property managers benefit from integrated services that combine surveys, quotes, and certification to reduce administrative overhead across multiple properties.

Table of Contents

How much does a consumer unit upgrade cost?

The price swings hugely on job type, which is why so many landlords and homeowners find conflicting numbers online. Here's a quick reference to orient yourself before the detailed breakdown further down.

  • 6-way split-load consumer unit: typically the cheapest domestic option, suited to smaller flats with fewer circuits.
  • 10-way all-RCBO board: the most common upgrade for a three or four-bedroom family home.
  • High-integrity boards: priced higher due to individually protected circuits, common in HMOs and larger properties.
  • Three-phase replacements: reserved mainly for larger commercial or mixed-use buildings, and priced well above domestic jobs.

A straightforward like-for-like swap usually takes a single working day, roughly four to eight hours, unless the electrician finds dangerous or outdated wiring that needs fixing first. The work must be carried out by, or notified through, someone registered with a Competent Person Scheme, and landlords should note that a consumer unit flagged on an EICR often needs remedial action within a set timeframe, not left indefinitely.

Quick fact: NICEIC says giving an accurate estimate before a survey is genuinely difficult, because unit type, circuit count, and property access all move the price independently of one another.

What is the average price for a consumer unit upgrade?

What is the average price for a consumer unit upgrade? — overview diagram

National guides quote a wide spread because they measure different things. The IET notes that consumer unit costs depend heavily on unit type, size, and the protective devices fitted, with typical UK job totals sitting anywhere from around £350 for a basic swap to £2,500 for a complex or high-integrity installation.

Three things explain the gap between guides:

  • Trade price versus customer price: some sources quote what an electrician pays a wholesaler for a bare board; others quote the full fixed-price job a homeowner actually receives.
  • Populated versus unpopulated boards: a board with MCBs and RCBOs already fitted costs more upfront but saves labour hours on site.
  • Regional labour rates: London and the South East routinely run higher than the North of England or Wales for identical work.

A worked example helps ground this. A typical 10-way, fully populated, all-RCBO consumer unit job for a three-bedroom semi usually includes the board itself, RCBOs for each circuit, a surge protection device, connection to existing meter tails, two to three hours of testing and certification, and the Part P notification fee bundled into the electrician's invoice. That combination is what most fixed-price quotes in the £700–£1,200 bracket actually cover, and it's worth asking any electrician to confirm each element is included rather than assuming it.

What does the price actually include?

Understanding the line items lets you compare quotes properly rather than just picking the lowest number.

Materials form one part of the invoice. A basic consumer unit shell costs relatively little, but RCBOs (which combine overload and earth leakage protection per circuit) add up quickly across ten or more ways, and a surge protection device adds a further premium if fitted, according to trade pricing reviewed by Elec-Mate.

Labour is usually the largest single cost. A straightforward swap runs four to six hours for most electricians, priced either as a day rate or a fixed job fee, and this is where regional variance bites hardest.

Certification and notification add a smaller but non-negotiable fee. The Electrical Installation Certificate and Part P notification are typically bundled into the total, though some sole traders quote them separately.

Common extras that get quoted on top include:

  • New earthing or bonding conductors if the existing ones don't meet current standards
  • Relocating the consumer unit to a more accessible position
  • Replacing deteriorated meter tails
  • Additional circuits added at the same time (useful if you're planning an EV charger or loft conversion later)

What types of consumer unit are available, and what do they cost?

Three main configurations dominate UK domestic installations, and the difference between them is mostly about how individually each circuit is protected.

Comparison of three consumer unit types

A split-load RCD board splits circuits across two RCDs (residual current devices), so a fault on one half won't cut power to the other. It's the budget option and still common in smaller flats.

An all-RCBO board gives every single circuit its own combined breaker and trip protection. If a fault occurs on the kitchen circuit, only that circuit trips, not half the house. This is now the standard recommendation for most family homes, and it carries a material premium over split-load because you're paying for one RCBO per circuit rather than two shared RCDs.

A high-integrity board takes RCBO protection further, often adding arc fault detection devices (AFDDs) for higher-risk properties. These suit HMOs and larger rental portfolios where fire risk and continuity of supply both matter more.

Pro Tip: If you're planning to add circuits later, such as an EV charger or a home office, ask your electrician to spec a board with two or three spare ways now. Retrofitting later usually costs more than adding capacity during the original installation.

What factors push the price up?

Two electricians can quote wildly different figures for what looks like the same job, and it's rarely because one is overcharging.

  • Condition of existing wiring: if circuits show signs of damage or don't meet current standards, Electrical Safety First's best practice guidance is clear that installers must not reconnect anything immediately dangerous without remedying it first.
  • Earthing and bonding: older properties often need upgraded earthing conductors to meet current wiring rules, which adds parts and time.
  • Meter tails and access: cramped understairs cupboards or tails that need replacing both extend the job.
  • Relocation: moving the unit to a new position means new first fix wiring, not just a swap.
  • Region: labour rates in city centres routinely run higher than rural or northern areas.
  • Special cases: three-phase supplies and higher-risk residential buildings (HRRBs) or HMOs almost always sit in a higher price band due to added complexity and compliance requirements.

Replacing a consumer unit is notifiable work under Part P of the Building Regulations in England and Wales, and the installer must issue an Electrical Installation Certificate once the job is finished. This isn't optional paperwork. If you sell or remortgage the property later, missing certification can create real problems with conveyancers and lenders who expect compliant records.

For landlords, the stakes are higher still. An EICR is generally recommended at five-year intervals, and when a report flags the consumer unit as unsatisfactory, remedial work typically needs completing within 28 days.

Statistic: landlords who bundle their EICR with consumer unit replacement often reduce total admin, since a single survey visit covers both the certificate and the remedial quote.

The replacement itself counts as an alteration under BS 7671, so the new work must meet current wiring regulations even where the rest of the property's wiring predates them.

  • Non-registered installers must notify Building Control directly and may face inspection fees.
  • Competent Person Scheme registration lets electricians self-certify, which is faster and usually cheaper overall.

How long does a consumer unit upgrade take?

A straightforward like-for-like swap normally takes four to eight hours, completed in a single day. That timeline extends when the electrician finds unsafe existing circuits, cramped access, or additional earthing work needed on the day.

  1. Pre-work survey: many electricians recommend an EICR or informal survey first to spot problems before quoting a fixed price.
  2. Isolation: power to the property is cut and the supply is made safe.
  3. Removal: the old consumer unit is stripped out.
  4. Fit: the new board is installed and circuits connected.
  5. Testing: every circuit is tested against BS 7671 requirements before power is restored.
  6. Certification: the electrician issues the EIC.
  7. Notification: Part P notification is submitted, either by the electrician's scheme or directly to Building Control.

If remedial work turns up mid-job, expect the electrician to pause and discuss it with you before reconnecting anything unsafe.

How do you choose the right electrician for the job?

A fixed-price quote means little if the electrician isn't properly registered or leaves out essential certification. Run through this before you sign anything.

  • Confirm registration with a Competent Person Scheme such as NICEIC or NAPIT, and ask for the registration number so you can verify it independently.
  • Check the quote explicitly states the Part P notification and Electrical Installation Certificate are included, not billed separately later.
  • Ask what make and spec of board they're fitting, whether it arrives pre-populated or gets wired on site, and how many labour hours they've allowed.
  • Ask what happens if they find unsafe existing wiring, and whether that's quoted separately or included as a contingency.
  • Ask about warranty on parts and workmanship.

Pro Tip: Treat "cash only, no paperwork" as an immediate red flag. A legitimate electrician has no reason to avoid issuing a certificate, since it's what protects you legally and financially down the line.

How can you reduce the cost without cutting corners?

A few sensible decisions bring the bill down without touching safety standards.

  • Bundle your EICR and consumer unit replacement into one visit to avoid paying for two separate surveys.
  • Ask whether a pre-populated board suits your job. It costs more as a component but often saves labour hours on site.
  • Get at least two or three itemised quotes so you're comparing like-for-like inclusions, not just a headline figure.
  • Book work outside peak local demand periods where your electrician has more flexibility on pricing.
  • Avoid unregistered "cheap" electricians. Redoing non-compliant work later almost always costs more than paying properly the first time.

Why portfolio landlords need a different approach to consumer unit upgrades

Managing one consumer unit upgrade is manageable. Managing them across twenty rental properties, alongside CP12 gas certificates and EPCs, is where admin quietly spirals.

777pcm runs in-house certified electricians rather than subcontracting the work out, which means one point of contact handles scheduling, remedial quoting, certification, and Part P notification without you chasing three different trades. For a portfolio, that consolidation matters: instead of separate invoices and separate access visits for the EICR and the consumer unit itself, one visit and one clear quote covers both.

That's the practical value of an integrated compliance service for landlords managing multiple properties at once.

Why the "cheapest quote" almost never wins

Homeowners fixate on the headline number, and it's easy to see why. But the quotes that look cheapest on paper are frequently missing something, whether that's the EIC, the Part P fee, or an honest allowance for remedial work if the existing wiring turns out to be unsafe.

The electricians who quote slightly higher upfront are usually the ones who've actually accounted for testing time, certification, and the chance that they'll find something unexpected behind the old board. That's not padding. It's realism. A landlord who saves £150 on a suspiciously cheap quote and then discovers unpermitted work three years later at the point of sale hasn't saved anything at all.

If there's one thing worth remembering from every price guide reviewed here, it's that the spread between £350 and £2,500 isn't guides disagreeing with each other. It's the same job priced honestly against wildly different starting conditions.

— Mike

Get your consumer unit upgrade quoted properly

777pcm is the practical alternative to juggling separate tradespeople for landlords who need a consumer unit upgrade done properly, on the first visit, without chasing paperwork afterwards. Our in-house certified electricians handle the EICR, the remedial quote, and the consumer unit replacement together, with Part P notification and your Electrical Installation Certificate managed as standard rather than an add-on you have to remember to ask for.

777pcm

If you're managing a single rental property or a full portfolio, the process starts the same way: request a survey and get a clear, itemised quote before any work begins. Get in touch with 777pcm to book a site visit and see exactly what your consumer unit upgrade will involve.

Where to check the rules yourself

  • Planning Portal: the official Part P notification requirements for electrical work.
  • Electrical Safety First: best practice guidance on replacing consumer units safely.
  • NICEIC: registered electrician guidance and typical cost variables.
  • The IET: consumer guidance on unit types and pricing factors.

Sources