Posted on 2026-03-11
Consumer Unit Upgrades in Cheltenham
Your consumer unit (fuse board) is the safety heart of your home's electrics. If yours is outdated, it may not protect you from electrical faults, fire, or electric shock. Here's what Cheltenham homeowners need to know.
Why your consumer unit matters
What it does
Your consumer unit distributes electricity to every circuit in your Cheltenham home and protects you from faults. Modern units contain MCBs (Miniature Circuit Breakers) that trip when a circuit is overloaded, and RCDs (Residual Current Devices) that trip in milliseconds if current leaks to earth, protecting you from electric shock. Older units with rewirable fuses offer much less protection and are a significant safety risk.
Signs you need an upgrade
Your consumer unit needs replacing if: it has rewirable fuses instead of MCBs, it doesn't have RCD protection, the casing is wooden or bakelite, it has scorch marks or burn damage, it trips frequently for no obvious reason, or it's more than 25 years old. Any of these are strong indicators that your Cheltenham home's electrical protection is inadequate by modern standards.
Consumer unit upgrade costs in Cheltenham
What you'll pay
A consumer unit upgrade in Cheltenham costs £350-£750 depending on the size of your installation (number of circuits). This includes the new unit, installation, full testing, an Electrical Installation Certificate, and notification to Building Control as required by Part P of the Building Regulations. An RCBO board (individual protection for every circuit) costs £400-£650. RCBOs are the premium option where each circuit is independently protected.
What's included
The price covers: the consumer unit itself (a quality brand like Hager, MK, or Wylex), removal of the old unit, installation and connection of all circuits, full testing of every circuit, labelling, an Electrical Installation Certificate, and Building Control notification. Your power will be off for 4-6 hours during the work. Plan accordingly, especially if you work from home.
The upgrade process
What to expect on the day
Your electrician will turn off the mains supply and work through the installation systematically. Each circuit is disconnected from the old unit, connected to the new one, and tested individually. The whole process takes 4-6 hours for a standard 3-bed home in Cheltenham. Afterwards, every circuit is tested against current regulations, and you receive a full test certificate. The electrician will explain the new unit and label every circuit clearly.
After the upgrade
You should notice some differences immediately. Modern MCBs trip and reset easily with a switch, unlike old rewirable fuses that need replacing. RCD protection means that if you accidentally cut a cable while gardening, the power trips in milliseconds rather than passing through your body. You may also find your home insurance premium reduces, as insurers recognise the improved safety.
Choosing an electrician in Cheltenham
Qualifications matter
Consumer unit replacements must be carried out by an electrician registered with a competent person scheme (such as NICEIC, NAPIT, or ELECSA). This allows them to self-certify the work and notify Building Control. Using an unregistered electrician means you'll need to pay for a separate Building Control inspection (£200-£400 extra), and if you sell your property, you'll need to provide the certificate.
How we can help
Our NICEIC-registered electricians in Cheltenham carry out consumer unit upgrades every week. We use quality components, test every circuit thoroughly, and handle all Building Control notifications. We provide an Electrical Installation Certificate valid for the life of the installation. Call 01242 512 101 for a free quote.