House Rewiring in the UK: A Complete Guide for Homeowners

Introduction

If you live in an older property or are planning a renovation, you’ve likely come across the term house rewiring. In the UK, keeping your home’s electrical system up to modern standards is not only crucial for safety but also a requirement for legal compliance and property value.

This guide explains everything you need to know about house rewiring in the UK — from when it's necessary, what the process involves, the current regulations, and typical costs in 2025.

What Is House Rewiring?

House rewiring is the process of replacing outdated or faulty electrical wiring throughout a property. It includes:

• Installing new cables, sockets, and switches
  
  

• Replacing the consumer unit (fuse box)
  
  

• Ensuring earthing and bonding is up to standard
  
  

• Adding RCD protection for enhanced safety
  
  

A full house rewire ensures the electrical installation complies with the 18th Edition Wiring Regulations (BS 7671).

When Does a UK Home Need Rewiring?

Rewiring is typically needed when:

• The wiring is over 30 years old
  
  

• You’re renovating or extending your home
  
  

• The fuse box lacks RCD protection
  
  

• Sockets and switches are worn, outdated, or cracked
  
  

• Lights flicker or fuses trip frequently
  
  

• You’re switching to modern appliances or smart technology
  
  

If you’re unsure, an Electrical Installation Condition Report (EICR) will identify if a rewire is necessary.

UK Regulations for House Rewiring

In the UK, any significant electrical work must follow:

• BS 7671: 18th Edition Wiring Regulations
  
  

• Part P of the Building Regulations (England and Wales)
  
  

This means:

• Work must be carried out by a qualified electrician
  
  

• You’ll need an Electrical Installation Certificate (EIC)
  
  

• The electrician must notify Building Control (if not registered with a competent person scheme)
  
  

Hiring a Part P registered electrician ensures legal compliance and proper certification.

Cost of Rewiring a House in the UK (2025)

The average cost to rewire a house in the UK depends on the property size, complexity, and location.

Property Size

Estimated Cost (Incl. VAT)

1-bedroom flat

£2,500 – £4,000

3-bedroom semi

£4,000 – £6,500

4-bedroom house

£6,500 – £9,000+

Additional costs to consider:

• Consumer unit upgrade: £400 – £800
  
  

• Plastering and redecoration: May be needed post-rewire
  
  

• EV charger or solar prep: Extra circuits may be required
  
  

Tip: Always request a detailed, written quote and ensure testing and certification are included.

What’s Involved in a Full House Rewire?

A typical house rewire includes:

1. First Fix: Cables are installed under floors and inside walls before plastering.
   
   

2. Consumer Unit Replacement: Your fuse box is upgraded to a modern unit with RCD protection.
   
   

3. Second Fix: Electricians fit sockets, switches, light fittings, and connect everything.
   
   

4. Testing & Certification: The installation is fully tested and certified for safety and compliance.
   
   

Timeframe:

• Small flat: 2–4 days
  
  

• 3-bed home: 5–7 days
  
  

• Larger homes: 1–2 weeks
  
  

Can You Live in Your House During a Rewire?

Technically yes, but it’s highly disruptive. A full rewire involves:

• Power being turned off
  
  

• Lifting floorboards
  
  

• Cutting into walls
  
  

• Dust and noise
  
  

Many people choose to vacate temporarily to speed up the process and reduce inconvenience.

Why Rewire a House?

✅ Meets current UK safety standards
✅ Prevents electrical fires and shocks
✅ Supports modern power demand
✅ Adds value to your property
✅ Required for some home insurance policies

Landlords and EICR Compliance

Landlords in England must have a valid EICR every 5 years. If the report identifies outdated wiring, a rewire may be required to ensure tenant safety and legal compliance.

Choosing a Qualified Electrician

For peace of mind, always use an electrician registered with a competent person scheme, such as:

• NICEIC
  
  

• NAPIT
  
  

You can check registrations at:   https://electricalcompetentperson.co.uk/

Conclusion

A house rewire in the UK is a major investment — but one that significantly enhances safety, efficiency, and future readiness. Whether you're upgrading an old property, preparing a rental for new tenants, or planning a renovation, always work with a qualified electrician who can certify the work properly.

Need a quote or professional advice? Search for “house rewiring electricians near me UK” or consult a local NICEIC-registered contractor today.