Electrical Rewiring FAQs: Your Questions Answered
Considering a full or partial rewire? Understand the warning signs, disruption, costs, certification and planning before committing to electrical work at your property.
Electrical installations do not need replacing simply because they are a certain age. The condition, suitability and safety of the wiring must be assessed. These answers explain how NOD Electrical Services approaches rewiring in occupied homes, renovations and commercial properties across South London.
What happens during a rewire?
Common questions about rewiring
How do I know whether my home needs rewiring?
Warning signs include damaged or deteriorated cable insulation, recurring circuit faults, inadequate earthing, unsafe alterations and circuits that no longer suit the property's use. An electrical inspection and test can help establish whether a full rewire, targeted repairs or a partial upgrade is appropriate.
What is the difference between a full and partial rewire?
A full rewire replaces the relevant existing fixed wiring across the property. A partial rewire replaces selected circuits or areas, such as a kitchen extension or damaged lighting circuits. The choice follows an assessment of what can safely remain in service.
How long does a house rewire take?
It depends on the size, construction, occupancy, access, and the extent of chasing and making-good. Smaller empty properties may be completed more quickly than occupied or complex buildings. We agree a realistic programme following a survey, not a generic timescale.
Can I remain at home during the work?
Sometimes. Staged works and temporary supplies may make occupation possible, but power interruptions, dust, noise and restricted access must be planned around. Where major chasing is required, vacant access is often more efficient and less disruptive.
Does a new consumer unit mean I need a rewire?
No. A consumer unit replacement and a rewire are separate scopes. Existing circuits must be assessed for suitability before connection to a new consumer unit; any defects discovered may require remedial work.
How much does electrical rewiring cost?
Cost depends on circuit count, floor area, access, occupied or vacant status, specification, containment, finishes and the extent of making-good. We provide a project-specific estimate after understanding the property and requirements.
Will floors and walls need opening?
Frequently, especially where cables are concealed. Existing routes may sometimes be reused where suitable. We discuss cable routes, lifting floors, chasing, protection of finishes and who is responsible for plastering or redecoration before work starts.
What electrical certificates will I receive?
New electrical installation work should be inspected and tested with the appropriate electrical certification, typically an Electrical Installation Certificate for a rewire. Applicable Building Regulations Part P notification and certification requirements will also be addressed for domestic work in England.
Can I add EV charging or future capacity during a rewire?
Yes. Planning for EV charging, heat pumps, data cabling, additional kitchen loads and future circuits while access is available can reduce later disruption. We can coordinate this with EV charger installation and wider electrical design.
Does rewiring need to comply with BS 7671?
Yes. New installation work is designed and verified against applicable BS 7671 requirements, including Chapter 52 for wiring systems and Part 6 for inspection and testing. Domestic work in England may also be subject to Part P notification, depending on the scope.
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Rewiring across South London
Based in Streatham, we carry out electrical work for homeowners, landlords and businesses throughout our local service area.