How much does rewiring a house cost in London?

Rewiring cost is one of the most-asked questions we get, and the honest answer is: it depends on a handful of specific factors more than square footage alone. Here's what actually moves the price.

Property size and layout

More rooms mean more circuits, more sockets, and more cable runs — but layout matters too. A period property with solid walls and awkward floor voids takes longer to chase and route cable through than a modern stud-wall build of the same size.

Access

If floorboards are already up, or you're rewiring during a wider renovation with walls stripped back, the job is faster and cheaper than rewiring a fully finished, furnished home where every cable run needs careful chasing and floorboard lifting.

Consumer unit condition

If your fuse box also needs replacing — which is common alongside a rewire — that's an additional but worthwhile cost, since there's little point installing new circuits into an outdated board.

Finish level

Standard white plastic sockets and switches cost less than brushed steel, black nickel, or smart/dimmable fittings throughout a property. This is one of the easier areas to control cost if budget is tight.

Making good

Rewiring involves chasing cable channels into walls, which then need plastering. Some quotes include making good to plaster-ready finish; full redecoration is typically separate.

Getting an accurate figure

Because so much depends on your specific property, generic online calculators are a poor substitute for a proper quote. Send us the number of rooms, roughly how old the wiring is, and a few photos of your current consumer unit, and we'll give you a realistic fixed price rather than a wide range.

The two biggest cost drivers we see aren't size — they're access (finished vs stripped-back property) and whether the consumer unit needs replacing too.