House Rewire Cost: What Affects the Price

People ask how much it costs to rewire a house more than almost any other question we hear. The truthful answer is that it depends on the house, and that an average cost of a house rewire found online rarely matches what your own property needs. This guide explains the factors that drive the price so you can understand a quote and compare two fairly. You will not find figures here, because they would mislead more than they help.

Size and number of points

The biggest factor is how much there is to wire. Every socket, switch, light, fused spur, smoke detection point and appliance connection is a point that needs a cable and a box. A three-bedroom semi with modest needs has far fewer points than a house of similar size with a large kitchen, an office and outdoor lighting. That is why a single rewire price per point doesn't tell the whole story: the effort per point changes with the house.

Full or partial rewire

A full rewire replaces every circuit. A partial rewire replaces some, for example where an extension has newer wiring that tests well. Partial work costs less in materials and labour but can involve extra testing to confirm the parts left in place are sound. Our guide on full versus partial rewiring explains how to tell which you need.

Occupied or empty

Rewiring an empty house is quicker. We can lift floors room by room, run cables freely and leave power off for long stretches. In an occupied home we move furniture, protect belongings, clear up every day and restore working power each evening. That extra care takes time, and time is cost. Our guide to how long a rewire takes covers the effect on the programme.

Floor and wall access

Suspended timber floors and hollow partition walls make cable routes easier. Solid concrete floors, thick stone walls, lath and plaster, or finished floors you want to keep all slow the work and may need surface containment or careful chasing. Loft space above and a clear void below help a lot.

The consumer unit

Most full rewires include a new consumer unit with modern protection, and the choice of layout affects cost. The earthing and bonding to gas and water pipes also has to be brought up to the current wiring regulations, BS 7671, which may mean new bonding conductors.

Making good and decorating

Cables are buried in chases and boxes are cut into walls. A quote usually includes filling those chases, but full plastering, skimming and redecorating are normally separate unless agreed in writing. Check what each quote includes, because this is where two prices that look different can turn out to be similar.

Certification

A rewire is new work and comes with an Electrical Installation Certificate and test results. Make sure every quote includes testing and the certificate, and that it covers notification where the work is notifiable under Building Regulations.

Comparing quotes

Ask each electrician to list the points, the board, what making good is included and how long the job takes. Comparing those lines side by side is far more useful than comparing a bottom-line figure alone.

Age and condition of the house

Older properties can hold surprises. Original lath and plaster ceilings, rubber-insulated cable, old metal conduit and later DIY additions all take time to remove safely and work around. Houses that have been extended several times may have circuits in unexpected places. A pre-quote survey, where we lift a few covers and look in the loft and under floors, makes the price far more accurate.

Extras worth considering at the same time

A rewire is the cheapest moment to add things you might want later: more sockets, outside lights, data points, a supply for a future EV charger or garden room, and better lighting layouts. Adding them now costs far less than going back once the walls are decorated.

Questions to ask before you accept a quote

Ask who will be doing the work and whether there will be one team throughout. Ask how power and lighting will be kept going if you are living in the house. Ask what happens if something unexpected is found, such as damaged joists or hidden asbestos, and how extra work would be priced. Ask when the certificate will be issued. Clear answers to these questions tell you as much about a contractor as the price does, and help you avoid disputes once the floorboards are up.

For a fixed quote, call 01235 430442.