How Long Does It Take to Rewire a House? Realistic Timescales by Property Size

Most people want one number when they ask how long a rewire takes. The honest answer is a range, and where you land in it depends on a handful of practical things: the size of the property, whether you're still living in it, how the walls are built, and what spec you've gone for. Below are realistic timings, what happens at each stage, and how to keep things moving.

How long does it take to rewire a house?

A full house rewire usually takes 5 to 10 working days for an average UK home. Smaller flats and unoccupied bungalows can be finished in 3 to 4 days. Larger or occupied properties often run to 10 to 14 days. The work happens in two stages, with testing and certification at the end.

These figures are time on site for the electrical work only. They don't include any plastering, redecoration, or finishing that follows the rewire, which usually adds another one to three weeks depending on how quickly other trades can be booked in.

Typical rewire times by property size

Most UK homes fall into one of five common sizes. These are typical day counts for a clean rewire by a small team in an empty property:

• 1-bed flat or bungalow: 2 to 4 days

• 2-bedroom house: 4 to 6 days

• 3-bedroom semi or terrace: 5 to 8 days

• 4-bedroom detached: 7 to 12 days

• 5+ bedroom house: 10 to 14 days

• HMOs and multi-unit buildings: assessed individually, often staged across weeks

Add 2 to 4 days to any of these if you're still living in the property while the work is going on. Older houses with solid walls, restricted access, or significant extensions tend to sit at the upper end of these ranges. In our experience, Victorian and Edwardian terraces almost always need a few extra days for the lath-and-plaster work and awkward cable routes.

What affects how long a rewire takes

The headline numbers above assume nothing unusual. Several factors push the time up or down.

• Property size and layout. More rooms means more circuits, more sockets, and longer cable runs.

• Occupancy. Rewiring an occupied home takes around 30 to 40% longer than an empty one, because rooms have to be staged, furniture moved, and power restored each evening.

• Wall construction. Solid masonry and lath-and-plaster need careful chasing. Plasterboard on studs is faster.

• Spec level. Extra sockets, smart home wiring, EV charger circuits, data cabling, and feature lighting all add hours or days.

• Access. Restricted lofts, fitted carpets, hardwood floors, and tight crawl spaces slow first-fix work.

• Condition of existing wiring. Some old installs come out cleanly. Others (lead-sheathed, mineral-insulated, rubber-insulated) need careful handling.

• Team size. A lead electrician plus a second pair of hands cuts time noticeably. Larger teams need precise planning to avoid people standing around.

• Decisions during the job. Changing socket positions mid-installation is the single biggest avoidable delay.

The wiring rules themselves don't change job-to-job. Every installation has to meet BS 7671, the current UK wiring regulations, and Part P of the Building Regulations. A competent electrician will work to those standards by default, but the testing and certification at the end is non-negotiable and takes time.

The stages of a full house rewire

A rewire isn't one continuous job. It's a sequence of stages, and knowing what's happening at each one helps you plan around it.

1. Survey and planning. Walk-through of the property to mark socket and switch positions, agree the spec, and plan cable routes. Usually half a day to a day, often done at quote stage.

2. Strip out. Old wiring, sockets, switches, and the consumer unit come out. In practice this overlaps with first fix.

3. First fix. Chasing walls, drilling joists, running new cables, fitting back boxes. The messiest and longest stage.

4. Plastering and making good. Patching the chases. Often a separate trade. Allow a few days for drying.

5. Second fix. Sockets, switches, light fittings, and the new consumer unit go in. Circuits are connected and energised.

6. Testing and certification. Full inspection and testing under BS 7671: insulation resistance, earth continuity, RCD operation, polarity. The Electrical Installation Certificate (EIC) is issued at the end. This is half a day to a full day on its own.

Without the testing and certificate, the work isn't legally complete. The certificate is what insurers, mortgage lenders, and future buyers will want to see.

Empty vs occupied: how it changes the timeline

This is the single biggest variable, and homeowners often underestimate it.

In an empty property the team can run wires across multiple rooms at once, leave floorboards up overnight, and crack on without interruption. In an occupied home everything is staged. Furniture has to be moved, power restored to certain rooms each evening, and dust sheeted areas kept liveable. We've worked on plenty of jobs where the same 3-bedroom rewire that would take 6 days empty has run to 10 days with the family still in residence.

If moving out for a week or two is realistic, it's almost always faster and cheaper overall. If it isn't, agreeing a clear room-by-room programme upfront keeps disruption manageable.

How to keep your rewire on schedule

A few practical things make a measurable difference to how long the job runs.

• Finalise the spec before work starts. Decide on socket positions, light switch placements, dimmer locations, and any extras like USB sockets or under-cabinet lighting. Changes during first fix cost time.

• Clear the rooms. Less furniture means less to cover, move, and work around.

• Get plastering booked in early. First fix and second fix can't connect without the walls being made good. Book the plasterer for the moment first fix finishes.

• Stay flexible on contingency. A day or two of slack covers any surprises hidden behind walls or under floors.

• Use a NICEIC or NAPIT-registered electrician. The certification process at the end is part of the job, and registered electricians can sign off their own work under Part P rather than waiting for a Building Control inspection.

Electrical Safety First keeps a useful registered electrician database if you want to verify credentials before booking. As electricians in Wolverhampton, we always issue certification at completion and provide a clear written quote with timings before any work starts.

When things take longer than expected

Even on a well-planned job, a few situations can push the timeline.

• Asbestos in older properties. Found in textured ceilings, vinyl floor tiles, and some insulation boards. Has to be handled by a licensed contractor before work continues.

• Structural surprises. Lifting floorboards sometimes reveals rot, woodworm, or notched joists that need attention before cables can be routed safely.

• Non-standard previous work. Botched DIY or unconventional installations from earlier decades have to be untangled before being replaced.

• Specification changes mid-job. Adding circuits or moving sockets after first fix means going back over completed work.

• Other trades running late. Plastering, decorating, and flooring all sit alongside the rewire. Delays elsewhere push the second fix back.

These aren't disasters when they happen. They are reasons to build a few days of contingency into the start date for any other work that depends on the rewire being finished.

Get a clear timeline before you commit

Every rewire is different, and the only reliable way to know how long yours will take is to have it surveyed. A proper quote should list the spec, the staged timings, and what happens at each phase. If you're in the West Midlands and want a written timeline before you commit, get in touch about rewiring in Wolverhampton and across the wider region. We'll book a site visit, walk through the property with you, and confirm exactly what the work involves.