Commercial rewiring starts with the premises
A commercial rewire replaces wiring within an agreed installation scope. It may cover an entire property or selected circuits. The decision depends on condition, proposed use, equipment and the existing supply. An office move, shop refit or new machine does not automatically mean every circuit must be replaced.
What we need to assess
Send the existing layout, proposed alterations, latest electrical report and an equipment list. We discuss distribution equipment, cable routes, access and the parts of the installation that would remain. Where a network operator, landlord or specialist equipment supplier needs to be involved, identify those dependencies before fixing the programme.
What belongs in a commercial rewiring quotation?
Use the same specification when comparing prices. Floor area alone does not establish the amount of electrical work or the cost of keeping a business operational.
| Item to agree | What the brief should say |
|---|---|
| Installation boundary | Circuits and distribution equipment to replace, retain or assess further. |
| Equipment | Fixed appliances, machinery and connection requirements supplied by the relevant manufacturers. |
| Access and shutdowns | Working hours, occupied areas, agreed phases and separately assessed temporary arrangements. |
| Containment and finishes | Cable routes, ceiling access, penetrations, reinstatement and responsibility for making good. |
| Other systems | Whether data, security, fire detection, emergency lighting or specialist commissioning are included. |
| Completion | Inspection, testing, certification, schedules, handover and treatment of outstanding work. |
| Price basis | VAT treatment, exclusions, allowances and a written process for approving changes. |
Can the premises stay open?
Some projects can be phased, but uninterrupted trading cannot be promised before assessment. Electrical circuits may serve more than one area. Identify critical equipment and agree who authorises interruptions and who checks business systems afterwards. A planned closure may be more workable than repeated short access windows.
Existing reports and new installation documents
An EICR helps assess an existing installation; it is not the certificate for a new rewire. The completed new installation work needs appropriate inspection, testing and certification with relevant schedules. Agree the handover records and identify separate documentation for specialist systems where those are included.
Get a property-specific scope
Contact Essex Home Electricians with your postcode, premises type, equipment information and preferred dates. Tell us whether you own or lease the property and whether other occupiers share services. We can discuss a survey and a written scope before the work is booked.
Guides for your type of premises
Commercial rewiring throughout Essex and surrounding areas
Choose your area for local rewiring information, including a business-planning section. Send your postcode if your location is not listed.
Related electrical services
Further guidance: HSE workplace electrical safety.