Project type
A simple replacement differs from fuse box replacement, upgrade work linked to testing, rewiring or EV charging.
Consumer unit cost calculator
Consumer Unit Cost Calculator UK
Estimate the cost to replace or upgrade a consumer unit in a UK home based on project type, property size, existing unit condition, circuit complexity, testing likelihood, access, related electrical work and region.
This calculator is for cost planning only. It does not provide DIY electrical instructions, legal compliance advice or a fixed quote. A qualified electrician needs to inspect the consumer unit, meter position, circuits and property condition before confirming the final price.
Consumer unit replacement, fuse box replacement or wider upgrade?
Consumer unit prices vary because a simple replacement is different from replacing an old fuse box, carrying out testing or upgrading the unit as part of a wider electrical project.
| Situation | Better description | Cost impact |
|---|---|---|
| Modern unit is being replaced | Standard consumer unit replacement | Usually lower scope if access and circuits are straightforward. |
| Older fuse box is being replaced | Fuse box replacement | Testing and remedial work are more likely. |
| Work includes testing and checks | Replacement with testing | More electrician time may be needed. |
| Problems are found during inspection | Remedial-work likely upgrade | Final cost can increase after faults or issues are identified. |
| Upgrade is linked to rewiring or EV charging | Wider electrical project | The consumer unit may be one part of a larger scope. |
Typical UK consumer unit replacement cost ranges
These broad ranges help you compare common consumer unit and fuse box replacement situations. Use the calculator above for a more specific planning estimate.
| Consumer unit project | Typical planning range | Best use |
|---|---|---|
| Basic consumer unit replacement | £700–£1,300+ | Straightforward replacement with easy access |
| Fuse box replacement | £850–£1,700+ | Older fuse boxes or dated installations |
| Replacement with testing | £950–£2,100+ | More checks, circuit identification or testing time |
| Replacement with remedial work likely | £1,200–£2,800+ | Issues found or expected before final quote |
| Consumer unit work linked to rewiring | £900–£2,300+ | Wider wiring work or upgrade project |
| Consumer unit work linked to EV charging | £800–£1,900+ | Capacity or circuit planning for home charging |
These are planning ranges. A qualified electrician needs to inspect the consumer unit, circuits, meter position and access before confirming a fixed quote.
What affects consumer unit replacement cost?
The final cost depends on the unit being replaced, the number of circuits, the checks needed and whether the electrician finds remedial work during inspection or testing.
Existing unit condition
Old fuse boxes, unclear labelling, damaged units or previous alterations can increase uncertainty.
Circuit count
More circuits can mean more checking, labelling, testing and labour.
Testing and remedial likelihood
This is often the main reason a quote increases after inspection.
Access to meter and unit
Cupboards, tight spaces, awkward meter positions and restricted access can slow the job.
Related electrical projects
Rewiring, EV charging, solar, batteries and heat pumps may change electrical planning.
Property size
Larger homes often have more circuits and more inspection time.
Region
Electrician labour rates vary across the UK, especially between lower-cost regions and London.
Why testing and remedial work can change the quote
A consumer unit replacement is not only a box swap. The electrician may need to check circuits, identify labels, assess existing wiring condition and confirm the final scope before the replacement can be completed.
Cost can increase if issues are found during inspection or testing. This might include unclear circuits, damaged wiring, poor access, older fittings or remedial electrical work that was not visible at the first estimate stage.
The calculator models this as a planning range. It does not replace an electrician’s inspection, and it does not provide safety advice or DIY replacement instructions.
Consumer unit work linked to rewiring or EV charging
A rewire may include consumer unit replacement, while EV charger installation may depend on consumer unit condition, available capacity or circuit arrangements. Pricing this work clearly helps avoid double-counting when multiple electrical upgrades are being planned.
If the consumer unit work is part of a larger wiring project, use the Rewiring Cost Calculator to estimate rewiring cost separately. If the upgrade is linked to home charging, use the EV Charger Installation Cost Calculator to estimate EV charger installation cost.
Consumer unit upgrades and wider energy planning
Some wider energy upgrades can affect electrical planning. Solar panels, battery storage and heat pumps may involve capacity checks or consumer unit considerations, but each project budget should stay separate until an electrician or installer confirms the combined scope.
Solar panel planning
If your consumer unit planning is part of a wider solar project, compare it with the Solar Panel Cost Calculator.
Battery storage planning
Battery storage may involve wider electrical planning. Estimate that budget separately with the Solar Battery Cost Calculator.
Heat pump planning
Heat pump installation can be part of wider home electrification planning. Compare costs with the Heat Pump Cost Calculator.
What may be included or excluded?
Consumer unit quotes vary by electrician, property condition and the agreed scope. Use this table to check what may sit inside or outside a typical estimate.
| May be included | May be excluded |
|---|---|
| Consumer unit supply and fitting | Full rewiring unless specified |
| Electrician labour for agreed scope | Remedial work found after testing |
| Basic testing linked to replacement | EV charger installation |
| Circuit identification where included | Solar, battery or heat pump installation work |
| Labelling and setup where included | Network operator or supply upgrade costs |
| Installer paperwork where relevant | Decorative making good or building work |
| Basic waste removal | Specialist investigation outside agreed scope |
When an electrician needs to inspect
CostIntel can estimate a planning range, but a qualified electrician needs to inspect the consumer unit, meter position, circuits, access and electrical condition before confirming a fixed quote.
Existing condition is unclear
If the current unit is damaged, poorly labelled or unknown, inspection is needed before the scope is confirmed.
Old fuse box is present
Older fuse boxes may require more checks and can increase the chance of remedial work.
Circuit count is unknown
The electrician may need to identify, label or test circuits before confirming the replacement cost.
Access is restricted
Tight cupboards, awkward meter positions and difficult working space can affect labour time.
Wider electrical work is planned
Rewiring, EV charging, solar, battery storage or heat pump work may change the combined scope.
Remedial work may be needed
If testing or inspection identifies issues, the final price may differ from the initial planning range.
How this consumer unit estimate is calculated
The calculator starts with a base range for the selected project type, then adjusts the estimate using property size, existing unit condition, circuit complexity, testing and remedial likelihood, access, related project context and region.
This approach is designed for early planning. A fixed quote can change after an electrician checks the consumer unit, meter location, circuits, testing requirements, access and wider electrical context.
For more detail, read our methodology, pricing data approach and how costs are calculated.
Related electrical and energy calculators
Consumer unit work can connect with rewiring, EV charging and wider energy upgrades. Use these calculators to compare related scopes without mixing the budgets together.
Rewiring Cost Calculator
Estimate wider rewiring costs if your consumer unit upgrade is part of a larger wiring project.
Estimate rewiring costEV Charger Installation Cost Calculator
Estimate home EV charger installation costs if your consumer unit work is linked to capacity planning for home charging.
Estimate EV charger installation costElectrical Cost Hub
Compare rewiring, EV charger and consumer unit calculators inside the Electrical Cost cluster.
View all electrical cost calculatorsSolar Panel Cost Calculator
Estimate solar panel costs separately if your consumer unit planning is part of a wider energy upgrade.
Estimate solar panel costConsumer unit cost FAQs
How much does consumer unit replacement cost in the UK?
Consumer unit replacement can often range from around £700 to £2,000 or more. The final price depends on property size, existing unit condition, circuit count, testing, access, remedial work and region.
How much does fuse box replacement cost?
Fuse box replacement often costs more than a straightforward modern consumer unit swap because older installations may need more testing, circuit checks or remedial work. A typical planning range may be around £850 to £1,700 or more.
Why can consumer unit replacement quotes increase after inspection?
Quotes can increase if testing finds issues, circuit labelling is unclear, access is difficult, the existing unit is damaged or remedial electrical work is needed before the replacement can be completed.
Does a consumer unit replacement include testing?
Testing may be included as part of the agreed scope, but the amount of testing and any remedial work can vary by property and electrician. The quote should clearly state what is included.
Do I need a new consumer unit for an EV charger?
Not always. Some EV charger installations can use the existing setup, while others may need consumer unit checks, circuit changes or upgrade work. Use the EV Charger Installation Cost Calculator to estimate the charger side of the project.
Does a new consumer unit mean I need a full rewire?
No, not automatically. A consumer unit replacement does not always mean the property needs rewiring. If the wiring condition is old, unclear or unsuitable, an electrician may recommend further investigation. Use the Rewiring Cost Calculator if wider wiring work may be needed.
Can consumer unit work be part of solar, battery or heat pump planning?
Yes. Wider home energy upgrades can involve electrical capacity and consumer unit checks. Estimate the energy project separately, then confirm the combined scope with a qualified electrician or installer.
Are CostIntel consumer unit estimates fixed quotes?
No. CostIntel estimates are planning ranges. A qualified electrician needs to inspect the consumer unit, meter position, circuits, access and electrical condition before confirming a fixed quote.
Does this calculator provide DIY consumer unit replacement advice?
No. This calculator is only for estimating replacement or upgrade costs. It does not provide DIY electrical instructions, legal compliance advice or guidance for carrying out regulated electrical work.