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Consumer Unit Upgrades in Oxford

Older Oxford homes often run consumer units that predate current RCD standards. Here is when an upgrade is needed, what it involves, what it costs, and the Oxford areas we cover.

Published 12 July 2026 · By Ryan Pumfrey


Oxford's housing runs from Victorian and Edwardian terraces around Jericho and East Oxford to post-war estates out towards Cowley and Headington, and a large share of these homes still run consumer units that predate current safety standards. Your consumer unit, the box on the wall with all the switches, controls and protects every circuit in the house. If yours is more than 25 years old, uses rewirable fuses, or has no RCD protection, it is worth getting looked at, especially in an older Oxford property where the wiring has often been added to over decades.

Why Oxford homes often need a consumer unit upgrade

A lot of Oxford's period housing has been through multiple owners, extensions and refurbishments, with circuits added piecemeal and rarely re-boarded. Around the universities and the city centre there is also a high concentration of shared houses and lets, where boards get heavy use and inspections have often lapsed. If you are selling, letting, or an EICR has come back with observations, a consumer unit upgrade is usually the single job that clears the most issues at once.

Signs your Oxford home needs a new consumer unit

  • It uses old-style rewirable fuses (a wire in a ceramic holder) instead of modern circuit breakers
  • The board is plastic and has no RCD protection. Current regulations require dual RCD or RCBO protection
  • Breakers or fuses trip often with no obvious cause
  • You are planning an extension, kitchen or loft conversion that needs new circuits
  • An EICR has returned a C1 or C2 observation on the consumer unit itself
  • The unit is older bakelite, or shows scorching, a burning smell, or discolouration

What RCD protection is, and why it matters

An RCD (Residual Current Device) detects the tiny current imbalance caused when electricity passes through a person, and cuts the power in under 40 milliseconds. Without it, a fault that a breaker would clear in a second can deliver a dangerous shock in the time it takes to blink. Modern consumer units have RCD protection built in. Older Oxford boards usually do not, and that is the single biggest reason to upgrade one.

What the upgrade involves

A standard domestic upgrade usually takes 4 to 8 hours. We survey the existing board, agree a fixed price before starting, then:

  • Isolate the power at the main fuse and disconnect the old unit
  • Fit a new dual RCD or RCBO consumer unit and re-terminate every circuit
  • Test each circuit and check the installation for compliance with BS 7671
  • Issue an Electrical Installation Certificate and notify Building Control under Part P where required

Does it need Building Regulations approval?

Yes. Replacing a consumer unit is notifiable work under Part P of the Building Regulations in England. We handle the certification and notification, so you receive an Electrical Installation Certificate and there is nothing you need to submit separately.

What does it cost in Oxford?

For a typical 3 to 4 bedroom Oxford home, expect roughly £400 to £700 for the unit and labour. The exact price depends on the number of circuits, whether you choose a full RCBO board (one device per circuit, which makes fault-finding easier), the condition of the existing wiring, and how the board is positioned. We quote a fixed price up front so there are no surprises on the day.

Oxford landlords and EICRs

If you let a property in Oxford, an EICR is a legal requirement and needs renewing every 5 years. An ageing consumer unit is one of the most common reasons a report comes back with C2 remedial observations, particularly in the city's older terraces and HMOs. Upgrading the board ahead of an inspection, or straight after one flags it, is usually the quickest route to a clean certificate.

Areas we cover in and around Oxford

We work across Oxford and the surrounding OX postcodes, including Jericho, Cowley, Headington, East Oxford, Summertown and Botley. If you are not sure whether you fall inside our area, get in touch and we will let you know.

Get a quote for your consumer unit

RMP Electrical carry out consumer unit upgrades across Oxford and the wider Thames Valley. Every quote is free and given before any work starts, with no obligation. Send us your postcode, a short description of your current setup, and a photo of the existing board if you can, and we will come back to you with a price.

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