Polarity.

Consumer Unit Replacement London

Fixed-price consumer unit (fuse box) replacement with a metal-clad 18th Edition board, RCBO or RCD protection, surge protection where required, and Part P certification.

0203 908 4790

About our consumer unit replacement service

Old rewireable fuse boxes and plastic consumer units without RCD protection are among the most common reasons for an unsatisfactory EICR. A new consumer unit protects every circuit with modern RCD or RCBO devices that cut the power in milliseconds if a fault or electric shock occurs.

Replacing a consumer unit is notifiable work under Part P of the Building Regulations. As a registered competent person we notify building control for you and issue an Electrical Installation Certificate, so you do not need a separate building control application.

Every board change includes testing of the existing circuits first. If a circuit fails insulation testing we explain the cause and give you a fixed price before going further — no surprises on the day.

What's included

  • Metal-clad 18th Edition consumer unit (BS EN 61439-3)
  • RCBO or dual-RCD protection
  • Surge protection device where required
  • Main earthing and bonding upgraded to current standards
  • Electrical Installation Certificate and Part P building control notification

Who it's for: Homeowners and landlords with old fuse boxes, failed EICRs, or planned EV chargers, extensions or kitchen refits.

Consumer Unit Replacement prices by property size
PropertyFixed price (inc. VAT)
Studio£314
1-bed flat£349
2-bed flat£524
3-bed house£663
4-bed house£838
5+ bed house£1,047
Commercial unit£1,222

Standard scheduling. Same-day and 48-hour slots carry a small priority fee shown in the quote.

Consumer Unit Replacement by London borough

Consumer Unit Replacement City of London Consumer Unit Replacement Barking and Dagenham Consumer Unit Replacement Barnet Consumer Unit Replacement Bexley Consumer Unit Replacement Brent Consumer Unit Replacement Bromley Consumer Unit Replacement Camden Consumer Unit Replacement Croydon Consumer Unit Replacement Ealing Consumer Unit Replacement Enfield Consumer Unit Replacement Greenwich Consumer Unit Replacement Hackney Consumer Unit Replacement Hammersmith and Fulham Consumer Unit Replacement Haringey Consumer Unit Replacement Harrow Consumer Unit Replacement Havering Consumer Unit Replacement Hillingdon Consumer Unit Replacement Hounslow Consumer Unit Replacement Islington Consumer Unit Replacement Kensington and Chelsea Consumer Unit Replacement Kingston upon Thames Consumer Unit Replacement Lambeth Consumer Unit Replacement Lewisham Consumer Unit Replacement Merton Consumer Unit Replacement Newham Consumer Unit Replacement Redbridge Consumer Unit Replacement Richmond upon Thames Consumer Unit Replacement Southwark Consumer Unit Replacement Sutton Consumer Unit Replacement Tower Hamlets Consumer Unit Replacement Waltham Forest Consumer Unit Replacement Wandsworth Consumer Unit Replacement Westminster

Home counties

Consumer Unit Replacement Essex Consumer Unit Replacement Hertfordshire Consumer Unit Replacement Buckinghamshire Consumer Unit Replacement Berkshire Consumer Unit Replacement Surrey Consumer Unit Replacement Kent

Consumer Unit Replacement FAQs

How much does a consumer unit replacement cost in London?

Our fixed price starts at £349 for a one-bed flat in London; larger homes scale with the number of circuits. You see the full price before you book.

How long does it take to replace a fuse box?

Usually half a day for a flat and a full day for a larger house. The power is off for most of that time, but we restore it the same day.

Is a fuse box replacement notifiable under Part P?

Yes. We are registered to self-certify, so we notify building control and you receive a compliance certificate by post.

Guides

Carbon-neutral service

Every job 100% offset