Calculator

House Rewiring Cost Calculator

Estimate the cost of rewiring your home based on property size, bedrooms, floors, and location. Includes Part P certification costs.

How to Use

Enter your property's total internal floor area in square metres.

Set the number of bedrooms and floors.

Toggle whether the property will be occupied during the work — this affects duration and cost.

Select your region for location-adjusted pricing.

Review the estimated cost range and timeline. Always get at least three quotes.

About This Calculator

This rewiring cost calculator gives homeowners and landlords a realistic estimate for a full or partial house rewire in the UK. Enter your property size, number of bedrooms, floors, and region to see estimated costs including Part P Building Regulations certification. Rewiring is one of the most disruptive and expensive electrical jobs — use this tool to budget accurately before getting quotes.

Frequently Asked Questions

How much does it cost to rewire a house in the UK?

A full rewire typically costs £2,500-£4,500 for a 2-bed flat, £3,500-£5,500 for a 3-bed semi, and £5,000-£8,000+ for a 4-5 bed detached house. London prices are 20-40% higher. These costs include first fix (cables), second fix (sockets/switches), a new consumer unit, and Part P certification.

How long does a full rewire take?

A typical 3-bed house takes 5-8 working days. Larger properties or occupied homes may take 7-12 days. The work is done in two phases: first fix (running cables through walls/floors/ceilings) and second fix (fitting sockets, switches, and light fittings). There is usually a gap between phases for plastering.

Do I need to move out during a rewire?

It is not essential but strongly recommended. During a rewire, the electricity is off for extended periods, floorboards are lifted, and there is significant dust. If you stay, the electrician must work room-by-room which takes longer and costs more. Budget an extra 15-25% for an occupied rewire.

What is Part P and do I need it?

Part P of the Building Regulations covers electrical safety in dwellings. Any notifiable electrical work (including a full rewire, new circuits, or consumer unit replacement) must be either done by a registered electrician (NICEIC, NAPIT, etc.) who self-certifies, or inspected by Building Control. The certificate is needed when selling the property.

How do I know if my house needs rewiring?

Signs include: old round-pin sockets, fabric-covered cables, a fuse box with rewirable fuses (no MCBs or RCDs), frequent blown fuses or tripped breakers, burning smells, or an EICR with C1/C2 codes. Houses wired before 1980 should be inspected. Properties over 40 years old almost certainly need rewiring.

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