How long does a consumer unit replacement take?

A standard consumer unit replacement typically takes 4-6 hours, including testing. If additional work is needed (earthing upgrades, circuit mods), it may take a full day.

Will I need to have the power off all day?

Power will be off for most of the installation (typically 3-5 hours). I can sometimes arrange temporary supplies for essential circuits.

Do I need Building Regulations approval?

Consumer unit replacements are notifiable work under Part P. As an NICEIC registered contractor, I self-certify the work and notify Building Control on your behalf – included at no extra cost.

What's the difference between a fuseboard and consumer unit?

"Fuseboard" is the older term from when fuses were rewirable. Modern "consumer units" use MCBs and RCDs you can reset with a switch.

Should I upgrade my consumer unit when rewiring?

Yes, absolutely. A new unit should be part of a rewire – it ensures your new wiring has proper protection and meets current regulations, and saves on labour.

Consumer Unit Replacement Cost 2026

Consumer Units In Practice

The existing and replacement consumer units from my work. I can assess your installation and explain whether an upgrade is appropriate.

Existing consumer unit and metering equipment before replacement — The existing consumer unit

Replacement consumer unit mounted above the metering equipment — The replacement consumer unit

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My consumer unit guide price

Guide prices depend on the property, access and work required. I confirm what is included, any VAT and the total in your written quote before you book.

Modern consumer unit with RCBO protectionFrom £750

Get a consumer unit quote

Tell me the postcode and what you need. I will confirm the scope, availability and quote.

Get a consumer unit quote What the service involves

What's included in the price?

New Consumer Unit – high-quality metal consumer unit with RCD protection (dual RCD split-load or full RCBO)
Professional Installation – full install including disconnection of old unit, connection of all circuits, and labelling
Full Testing – insulation resistance, earth continuity, polarity, RCD operation times
Certification & Notification – Electrical Installation Certificate, circuit schedule, and Building Control notification

Signs you need a consumer unit upgrade

Time for an upgrade

•Old rewirable fuse board (fuse wire, not switches)
•Wooden or plastic back box (fire risk)
•No RCD protection (no "test" buttons visible)
•Frequent tripping or blown fuses
•Burning smell or scorch marks around the board
•Adding new circuits (EV charger, extension, etc.)

Types of consumer unit

Dual RCD (Split-Load) – two RCDs each protect a group of circuits. I will explain whether an existing board needs upgrading.
Full RCBO Board – each circuit has its own protection. My published replacement price is for a modern RCBO board.
High Integrity Board – combines individual RCBOs with grouped RCD protection. The appropriate specification depends on the installation.

What can add to the cost?

Earthing upgrades – older properties may need main earth bonding improvements
Circuit modifications – if existing circuits need splitting, extending, or fault rectification
Meter tails upgrade – if cables between the meter and consumer unit are undersized or damaged
Relocation – moving the unit to a more accessible position or out of a bathroom

Why use an NICEIC electrician?

Work is self-certified – no need for separate Building Control inspection
Proper certification for insurance and future property sales
Work guaranteed and backed by NICEIC Platinum Promise
Compliance with BS 7671 (18th Edition) wiring regulations

Consumer Unit Replacement Cost Guide 2026