Rewire Cost Calculator UK | House Rewire & Consumer Unit

How to use the rewire cost calculator

Under What do you need?, choose Full rewire (includes a new consumer unit) or New consumer unit (fuse box) only.
For a full rewire, pick the Size of home: a 1-bed flat, 2-bed house or flat, 3-bed semi-detached, 4-bed detached or 5-bed house.
For a consumer unit only, pick its size under Size of consumer unit: 6-way, 10-way or 12-way. The number of ways is how many circuits it can feed, and most houses need 10 or more.
Pick your region under Where do you live? so the price is adjusted for London, the South East, the North, Scotland, Wales or Northern Ireland.
Tap Add to shopping list to keep the result, or Share link to send it to your electrician.

Why use this calculator

It answers the common question straight away: what does it cost to rewire a house my size? You pick a home size and see a range, instead of reading one price for a 3-bed house.

It makes clear what the price includes. A full rewire price already includes the new consumer unit, testing and the electrical certificate, so you do not add one on top.

It also prices a consumer unit on its own, and adjusts for region, so you can see how a London quote compares.

How we worked it out

Your numbers, step by step. This updates as you change the calculator.

Using UK average prices, so no regional adjustment.
A full rewire of a 3-bed semi costs £4,450 – £8,500 (typical £6,350). That includes the new consumer unit, testing and the electrical certificate. Making good and plastering are not included.
Total = £4,450 – £8,500 (typical £6,350)

How we estimate the cost

We use low, typical and high prices from published UK cost guides.

Full rewire: the price range for your size of home. It already includes the new consumer unit, testing and the electrical certificate.
Consumer unit only: the price range for a 6-way, 10-way or 12-way unit, supplied, fitted and tested.
Region: the price is multiplied by a regional factor. London is 1.25, the South East 1.15, the North 0.92, Scotland 0.93, Wales 0.92 and Northern Ireland 0.88. These are our own estimates, not an official index.

There is no per-room or per-socket maths here. The size of the home sets the range.

What’s included

Full rewire, including a new consumer unit, testing and certificate, UK average:

Home	Low	Typical	High
1-bed flat	£2,500	£3,500	£4,800
2-bed house or flat	£3,500	£4,650	£5,800
3-bed semi-detached	£4,450	£6,350	£8,500
4-bed detached	£6,080	£8,100	£10,500
5-bed house	£7,500	£10,000	£12,500

Consumer unit only, supplied, fitted and tested:

6-way: £350 to £500, typically £425.
10-way: £480 to £640, typically £525.
12-way: £610 to £850, typically £730.

Not included: making good (chasing walls, plastering, redecorating), and VAT where a firm adds it. Some of the prices behind this calculator exclude VAT, so check each quote.

What changes the price

Size of the home. More rooms and more circuits mean more cable and more time.
Access. Floors and walls that are hard to get to take longer.
Making good. Chasing out walls and plastering afterwards is usually priced separately.
Consumer unit. Bigger houses need a bigger unit with more ways.
Where you live. Electricians charge more in London and the South East.
VAT. Some prices include it and some do not.
Your electrician. Quotes differ, so get at least three and ask what is covered.

Tips

Use a registered electrician for a rewire, and ask for the electrical certificate when the work is done. Ask your electrician or council building control what applies where you live.
Making good (chasing walls, plastering, redecorating) is usually extra. Ask each electrician what is covered.
Check whether each quote includes VAT. Some of the prices behind this calculator exclude it, and VAT is 20%.
Get at least three quotes and compare them with the quote checker.
If you are also planning a new kitchen or bathroom, think about the wiring first. See the kitchen cost and bathroom cost calculators.

FAQs

How much does it cost to rewire a house?

A full rewire costs about £4,450 to £8,500 for a 3-bed semi, typically around £6,350. Smaller homes cost less and bigger ones more: from about £2,500 for a 1-bed flat to £7,500 to £12,500 for a 5-bed house.

How much does it cost to rewire a 3-bedroom semi-detached house?

About £4,450 to £8,500, typically £6,350. In London the calculator uses a factor of 1.25, which takes that to about £5,560 to £10,630.

How much does it cost to rewire a 4-bed house?

About £6,080 to £10,500, typically around £8,100, for a 4-bed detached house. A 5-bed house is about £7,500 to £12,500.

Does a rewire price include a new consumer unit?

Yes. A full rewire price includes the new consumer unit, testing and the electrical certificate, so do not add one on top. Making good and plastering are not included.

How much does a new consumer unit cost?

About £480 to £640 for a typical 10-way unit, supplied, fitted and tested. A 6-way unit is about £350 to £500 and a 12-way about £610 to £850.

Does a rewire price include VAT?

Not always. Some of the prices we use exclude VAT, which is 20%, and the calculator does not add it on top. Ask each electrician whether VAT is in their quote.