Home & Garden cost guide

Consumer Unit Replacement Cost

How much does it cost to replace a consumer unit?

The consumer unit is still what most people refer to as the ‘fuse box’. The prices shown here are to install a new consumer unit of different configurations replacing an old fuse box or a unit that’s reached its capacity. Prices include all the paperwork required, testing, materials and of course labour charges.

The cost of installing consumer units has risen dramatically in recent years due to increased safety legislation and certifications . For a complete consumer unit replacement you can expect to pay in the region of £400 – £600 + VAT and will take between half a day and a full day, you can find actual prices paid in our user submitted prices section.

What is a Consumer Unit?

A consumer unit is an electrical box with breakers between the electricity meter and all the other electrical circuits in the house. It is often called a fuse box, but modern boxes do not contain fuses anymore, but plug-in Miniature Circuit Breakers (MCBs) and RCDs (Residual Current Device). MCBs are better than fuses, because they can be reset after tripping, whilst a fuse must be replaced.

A series of MCBs and usually one RCD are fitted onto a DIN rail, but in the case of a dual consumer unit you may have more RCDs.

The MCB is an electrical switch, designed to protect an electrical circuit from overload or short-circuit. When it detects a fault, it interrupts the electrical flow by tripping. Contacts inside a MCB must carry the load without getting too hot and must also withstand the heat produced by the arc when it trips.

What is an RCD?

An RCD, or Residual Current Device, is a crucial safety component in a consumer unit (or electrical distribution board). Its primary function is to protect against electric shock and fire hazards by constantly monitoring the balance of current flowing in the live and neutral wires of an electrical circuit. If it detects a difference in current, suggesting a leakage or fault, the RCD rapidly cuts off the power supply, preventing potential harm. This quick response is vital for safeguarding individuals and property from the dangers of faulty appliances, damaged wiring, or accidental contact with live parts. RCDs are a key element of electrical safety standards, ensuring that any imbalance in current, indicative of a fault, triggers an immediate protective action, minimizing the risk of injury and ensuring a safer electrical environment.

User submitted consumer unit prices

Prices provided to us by WhatPrice users are listed below, generally these are the amount people have paid and will include VAT, unless otherwise stated. These are to be used as a guide only to provide a ballpark figure for similar situations, specific installations can vary costs significantly so always get a few quotes to compare.

Job typeHouse typeDescriptionPriceUnitsRegionUpdated
New consumer unit (fuse box)1 bed Flat

I think I have been totally ripped off for installing a consumer unit of six circuits for a studio flat of only 325 sq ft

£800

Total priceLondon2024
New consumer unit (fuse box)3 bed Detached house

install missing PEB onto water services. supply and install 10 way fuseboard. 2 men

£1,030

Total priceEast Midlands2023
New consumer unit (fuse box)4 bed Detached house

install new 12 way Niglon consumer unit with tails

£462

Total priceWest Midlands2023
New consumer unit (fuse box)3 bed Semi-detached house

Replace 10 way split load rcd new tails and main earth binding in place

£550

Total priceLondon2023
New consumer unit (fuse box)4 bed Semi-detached house

Supplied and fitted 10 way RCD consumer unit to replace old fuse board.

£400

Total priceNorth West2023
New consumer unit (fuse box)3 bed Terraced house

Installation of 10 way consumer unit with bonding to gas and water pipes. New 25 mm meter new tails with 16mm earth.

£515

Total priceLondon2023
New consumer unit (fuse box)3 bed Detached house

Consumer Unit Change for 3 bed house.

£400

Total priceNorth West2023
New consumer unit (fuse box)3 bed Semi-detached house

To supply and fit a hi-integrity dual RCD 10w Consumer Unit. Includes all testing, certification and notification to LABC via Elecsa/NICEIC Part P membership. Does NOT include remedial work.

£550

Total priceNorth East2023
New consumer unit (fuse box)4 bed Detached house

Dual RCD consumer unit – replacement with completion certificate and EICR

£500

Total priceLondon2023
New consumer unit (fuse box)3 bed Semi-detached house

Remove existing consumer unit, supply and install 10 module MK Consumer Unit complete with 2 x RCD and miniature circuit breakers. Renew meter tails using 25mm2 issue certification

£450

Total priceSouth West2023
New consumer unit (fuse box)2 bed Terraced house

New 10 way consumer unit, upgrade meter tails, earthing and bonding, all tests, certification and Part P notification.

£515

Total priceSouth West2023

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