How Long Does It Take
to Rewire a House?
The honest range for a UK rewire is 3 to 15 working days depending on property size, access plus scope. This guide breaks it down by house type plus shows where the time actually goes from first fix through to certification.
A typical UK 3-bed semi rewire takes 5 to 10 working days. A 1-bed flat is usually 3 to 5 days. A 4-bed detached runs 7 to 14 days. A 5-bed period property with solid floors or hard plaster can stretch to 14 or 15 days. Add 1 to 2 days for full inspection plus testing on top of first fix plus second fix. Time is dominated by the first fix phase, not the second fix or certification.
The figures that matter
1-bed flat
Compact layout, easier cable runs, single consumer unit area.
3-bed semi
The UK average. Most rewires C-Lec quotes fall inside this window.
4-bed detached
More circuits, more rooms, often two-storey loft cable runs.
Test plus certify
Always extra to first fix plus second fix. Required for the EIC certificate.
Four things to consider
First fix is longest
Lifting floors, chasing walls plus pulling cable accounts for 60% of the total job time.
Solid floors slow things
Concrete or screed floors mean surface trunking or chased channels. Add 2 to 3 days.
Hard plaster slows things
Pre-1960 lime or hard cement plaster takes longer to chase plus blunts disc cutters faster.
Test plus certify always extra
1 to 2 days for full BS 7671 18th Edition testing on top of fitting time.
Where the time actually goes during a UK rewire
When clients ask how long a rewire takes, they are normally expecting a single number. The reality depends heavily on property size, access plus floor construction. A 1-bed flat with suspended timber floors plus easy loft access can be done in 3 working days. A 5-bed detached with solid concrete ground floors plus original lime plaster can take 14 or 15.
First fix dominates the schedule. Lifting floorboards, chasing channels into walls plus pulling new twin and earth cable from the consumer unit out to every socket, switch plus light position takes around 60 percent of the total job time. On a 3-bed semi this typically runs days 2 through 6.
Second fix is faster. With cables already in position, terminating sockets, switches plus light fittings then commissioning the new consumer unit usually only takes 2 to 3 days for a 3-bed.
Testing plus certification is mandatory plus always extra. Under BS 7671 18th Edition Amendment 3, every new installation needs full inspection plus test before the EIC certificate can be signed off. Allow a minimum of 1 day for a 3-bed plus 2 days for larger properties.
Other time variables that catch homeowners out:
- Solid concrete floors. No floorboards to lift means surface trunking, chased channels or core drilling between rooms.
- Hard plaster. Houses pre-1960 often have lime or hard cement plaster that chases slowly plus shatters disc cutter blades.
- Listed status. Cable routes often have to avoid period features adding time plus complexity.
- Decoration scope. If you want flush sockets in chased boxes rather than surface-mounted, that adds time.
Real number ranges
Working days by property type
Inside a typical 3-bed rewire week
Set-up
Carpets up, dust sheets down, furniture moved, power isolation plan agreed with the household.
First fix
Cable runs pulled to every accessory, back boxes installed, consumer unit position prepped.
Second fix
Sockets, switches plus light fittings terminated. New metal consumer unit installed plus commissioned.
Test plus hand-back
Full BS 7671 inspection plus test, EIC certificate issued, Building Control notification submitted.
Four ways to keep your rewire on schedule
Lock the spec on day one
Late changes to socket positions or kitchen layout add 1 to 2 days to the total schedule.
Clear access in advance
Lofts, cupboards plus understair spaces should be empty before the team arrives on day one.
Decide on smart kit early
Smart switches, dimmers plus underfloor heating each need their own back box plus cable spec.
Book the plasterer for week 2
Patch plastering should follow within 7 days. Any longer plus dust ingress becomes a problem.
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Compare the options
Easy access property
- •Suspended timber floors on both storeys allow fast cable runs.
- •Modern plasterboard walls chase quickly plus cleanly.
- •Loft fully boarded plus accessible for cross-floor runs.
- •Standard ceiling heights at 2.4m or thereabouts.
- •Schedule: normally hits the lower end of the 5 to 10 day range.
Difficult access property
- •Solid concrete or screed ground floor requires surface trunking or core drilling.
- •Original lime or hard cement plaster slows wall chasing significantly.
- •Restricted loft access with hatches under 600mm or low headroom.
- •High ceilings or vaulted areas requiring scaffold or longer access platforms.
- •Schedule: add 2 to 5 days on top of the standard quote.
Timing is one part of the rewire decision. Cost plus disruption are the other two. Our home rewires hub brings all three into one place.
Visit the Home Rewires Hub
This article is one chapter inside our complete Home Rewires knowledge base. The hub covers timing, cost, disruption plus regulation in a single index.
If you would like a fixed quote with a clear day-by-day schedule, our Bedford electrician page outlines our local rewire service plus how we book the testing day at the front of the job.
More on home rewires
Three closely related articles. How disruptive is rewiring a house covers the day to day reality. How much to rewire a 3-bed house sets honest cost expectations. Does a 1970s house need rewiring is the most common starting point.