How Much Does a Consumer Unit Replacement Cost in Medway?

A consumer unit replacement — replacing the fuse board that controls and protects the electrical circuits in your home — is one of the most common single electrical jobs carried out across Medway. It is not as dramatic as a full rewire and not as straightforward as fitting a new socket, but it is a job that a significant proportion of homes in the area either need now or will need in the next few years.

Medway’s housing stock makes this particularly relevant. The Victorian and Edwardian terraces across Rochester, Chatham and parts of Gillingham, the inter-war semis of Rainham and Wigmore, and the post-war housing estates that expanded the conurbation through the 1950s and 1960s all contain properties where the original fuse board — or a replacement fitted 20 or 30 years ago — is no longer adequate by current standards. Even many 1980s and 1990s installations are now old enough to be worth assessing.

This post sets out what a consumer unit replacement costs in Medway, what drives the price up or down, and what the process involves.

What Does a Consumer Unit Replacement Cost in Medway?

The cost of replacing a consumer unit in Medway depends primarily on the size of the installation — how many circuits the property has, and whether any additional work is needed alongside the board replacement itself. Realistic current prices from a registered local electrician are:

• Small property — up to 6 circuits (flat or small terraced house): £380–£550
• Standard property — 6 to 10 circuits (typical semi or terraced house): £500–£700
• Larger property — 10 to 16 circuits (larger semi or detached): £650–£900
• Complex installation — 16+ circuits or significant additional work required: £900–£1,400+

These are installed prices covering the new consumer unit, all connections, testing and an Electrical Installation Certificate on completion. They assume the existing wiring is in satisfactory condition and does not need replacing alongside the board.

Medway sits in the mid-range for Kent electrical labour costs — above the more rural parts of the county but below the premium charged in the commuter towns of west Kent and considerably below London rates. For ME1 to ME8 postcodes and the wider Medway area, the figures above represent what you should realistically expect to pay from a competent, registered electrician.

What Is a Consumer Unit and Why Does It Matter?

The consumer unit — commonly called the fuse board or fuse box — is the central hub of your home’s electrical installation. It receives the incoming supply from the meter, distributes it to the individual circuits throughout the property, and provides protection against electrical faults through fuses, MCBs (miniature circuit breakers), RCDs (residual current devices) and RCBOs (residual current breakers with overload protection).

Older consumer units — particularly the rewireable fuse boards common in properties built before the 1970s, and the early MCB boards fitted through the 1970s and 1980s — do not provide the level of protection required by current wiring regulations. A modern consumer unit with full RCD or RCBO protection provides significantly better safeguarding against electric shock and fire caused by electrical faults, and is the standard expected by building control and required by insurers in many cases.

What Types of Consumer Unit Are Available?

Standard Split-Load Consumer Unit

The most common type installed in domestic properties. The board is divided into two sections — one protected by an RCD covering general circuits, and one for circuits that need to remain live if the RCD trips (smoke alarms, freezers). This is a cost-effective solution that provides a reasonable level of protection and suits most standard Medway family homes.

Full RCBO Consumer Unit

A step up from the split-load board, a full RCBO unit gives every individual circuit its own RCBO — combining overload protection and RCD protection in a single device per circuit. If one circuit develops a fault, only that circuit trips rather than the entire half of the board. This is increasingly the preferred specification for new installations and is worth considering if you are having significant electrical work carried out alongside the board replacement.

The cost is higher than a standard split-load board — typically £100 to £200 more for the board itself — but the operational benefit of individual circuit protection is meaningful, particularly in a family home where a nuisance trip cutting power to multiple rooms simultaneously is a significant inconvenience.

Metal Consumer Units

Since 2016, all new consumer unit installations in domestic properties have been required to use metal-encased units rather than plastic. This is a fire safety requirement — a metal enclosure contains any arc fault or fire within the unit rather than allowing it to spread. Any competent electrician will install a metal consumer unit as a matter of course. If you receive a quote specifying a plastic unit, it does not meet current regulations.

What Affects the Final Price?

Number of Circuits

The most straightforward variable — more circuits means more connections, more testing, and more time. A modest flat in Chatham with six circuits is a materially different job to a four-bedroom detached house in Rainham with fourteen circuits. Always confirm the circuit count is accounted for in any quote you receive.

Condition of the Existing Wiring

A consumer unit replacement is only appropriate where the existing wiring throughout the property is in satisfactory condition. If the cables are deteriorated, incorrectly rated, or of a type that is no longer acceptable under current regulations — old rubber-insulated wiring is the most common example in Medway’s older housing stock, particularly in the Victorian terraces of Rochester and the older parts of Chatham — a board replacement alone does not address the underlying problem.

Where the wiring is in poor condition, a full or partial rewire is needed alongside or instead of the board replacement. A thorough electrician will assess the wiring before quoting and tell you honestly what is needed rather than simply replacing the board and leaving the cabling untouched.

Earthing Arrangements

Modern wiring regulations require adequate earthing and bonding throughout the installation. Older properties in Medway — particularly those with original lead water supply pipes, pre-1980s gas installation connections, or non-standard earthing arrangements — sometimes require additional bonding work at the time of a consumer unit replacement. This adds to the cost but is a genuine safety requirement rather than an upsell.

Consumer Unit Location and Access

A consumer unit in a readily accessible location — a hallway, utility room or kitchen — is more straightforward to replace than one in an awkward position: under a staircase, in a low-ceilinged outbuilding, or behind fixed furniture. Restricted access adds time and therefore cost. It is worth mentioning any access constraints when getting quotes.

Additional Work Required

Some consumer unit replacements are straightforward like-for-like swaps. Others involve additional work — adding circuits for a newly installed EV charger, extending the board to accommodate a shower circuit that was previously on a separate isolator, or upgrading the incoming tails between the meter and the board. Each addition affects the final price and should be itemised clearly in any quote you receive.

What Does the Process Involve?

A consumer unit replacement is typically a single day’s work for most Medway properties. The process runs as follows.

The electrician arrives, isolates the incoming supply at the meter, and disconnects all circuits from the existing board. The old unit is removed. The new consumer unit is mounted and all circuits are reconnected and labelled clearly. The earthing and bonding arrangements are checked and any deficiencies addressed.

Once the new board is connected, a full series of electrical tests is carried out on every circuit — earth loop impedance, insulation resistance, polarity and RCD response time. These tests confirm that the installation is safe and that each protective device will operate correctly under fault conditions.

On satisfactory completion, an Electrical Installation Certificate is issued. This is a legal requirement under Part P of the Building Regulations and is the document that confirms the work has been carried out to the required standard by a registered competent person. You will need it when you come to sell the property — keep it with your other property documents.

The supply is off throughout the working day while the board is being changed. For most properties this means planning around it — emptying the freezer the night before is sensible, and anything time-sensitive that requires power is worth rescheduling.

Do You Need Building Regulations Approval?

Yes. A consumer unit replacement is notifiable work under Part P of the Building Regulations. Using a registered electrician — a member of NICEIC, NAPIT, ELECSA or an equivalent government-approved competent person scheme — means the work is self-certified and notified to building control on your behalf without any additional process required from you.

An electrician who is not registered with a competent person scheme can still carry out the work, but building control notification must be made separately and a building inspector must sign off the installation. In practice, using a registered electrician is simpler, faster and the standard expectation for this type of work.

Should You Get an EICR First?

If you are not certain whether your Medway property needs a full consumer unit replacement or something more limited — or conversely, whether the board is the only issue or whether the wiring needs attention too — an EICR is a sensible starting point.

An EICR inspects and tests the full installation and grades any deficiencies by urgency. It will tell you clearly whether the consumer unit is the primary issue, whether the wiring needs work, and what the priority order is. For older properties across Rochester, Chatham and Gillingham where the electrical installation has not been formally assessed in some time, an EICR before committing to a consumer unit replacement avoids the risk of replacing the board and then discovering the wiring also needs attention.

EICR costs in Medway typically run between £120 and £260 for a standard domestic property. Many electricians will offset the cost against the consumer unit replacement quote if work is confirmed as necessary.

If you are based in Medway — Rochester, Chatham, Gillingham, Rainham, Strood, Hoo or the surrounding villages — get in touch and we will assess the installation and give you a clear, honest quote. No obligation, no pressure.