Commercial Electrical Installation in Kent: A Complete Guide for Businesses
From office fit-outs and retail units to industrial premises and new builds — what commercial electrical installation involves, what it costs, and how to choose the right contractor
Commercial electrical installation covers the design, installation, and certification of electrical systems in non-domestic premises — offices, retail units, warehouses, restaurants, schools, medical facilities, and industrial buildings. It is governed by BS 7671:2018 (the IET Wiring Regulations), the Electricity at Work Regulations 1989, and in some cases additional sector-specific standards. Choosing a contractor with genuine commercial experience is essential: the consequences of a poorly designed or installed commercial system range from nuisance tripping to fire, equipment damage, and regulatory prosecution.
What Does Commercial Electrical Installation Include?
| Work Type | Description |
|---|---|
| Distribution board installation | Main and sub-distribution boards, metering, isolation |
| Power circuits | 13A ring and radial circuits, 3-phase outlets, dedicated equipment feeds |
| Lighting installation | General, emergency, and specialist lighting to BS EN 1838 |
| Emergency lighting | Escape route, open area, and high-risk task area lighting |
| Fire alarm wiring | Category L and M systems to BS 5839-1 |
| Data and comms infrastructure | Cat6/Cat6A structured cabling, server room power |
| EV charging | Workplace chargepoints, load management, OZEV grant compliance |
| Air conditioning electrical supply | Dedicated circuits, isolators, and controls for HVAC systems |
| Testing and certification | EIC, EICR, minor works certificates to BS 7671 |
Commercial Electrical Installation Costs in Kent
Commercial electrical costs vary significantly depending on the scope, specification, and condition of the existing installation. The following figures are indicative for typical Kent commercial projects in 2026.
| Project Type | Typical Cost Range |
|---|---|
| Small office fit-out (up to 500 sq ft) | £3,000–£8,000 |
| Medium office fit-out (500–2,000 sq ft) | £8,000–£25,000 |
| Retail unit fit-out | £5,000–£20,000 |
| Restaurant or café electrical installation | £8,000–£30,000 |
| Warehouse or light industrial unit | £10,000–£50,000+ |
| New build commercial (per sq m) | £40–£120 per sq m |
| Consumer unit / DB replacement | £800–£3,000 |
These figures cover labour and materials for the electrical installation only. They do not include mechanical services, data cabling, fire alarm systems, or access control — though Kent Trade Solutions can coordinate these as part of a managed installation.
Regulations and Compliance for Commercial Premises
Commercial electrical installations must comply with a broader set of regulations than domestic work. The primary standard is BS 7671:2018+A2:2022, but commercial premises must also consider the Electricity at Work Regulations 1989, the Building Regulations Part P, the Regulatory Reform (Fire Safety) Order 2005, and any sector-specific standards applicable to the premises type. All notifiable work must be certified with an Electrical Installation Certificate (EIC) signed by a competent person registered with a government-approved scheme such as NICEIC.
Air Conditioning and Commercial Electrical: Why They Go Together
The majority of commercial AC installations require dedicated electrical circuits — typically a 20A or 32A radial circuit per outdoor unit, with appropriate isolation and protection. When Kent Trade Solutions installs a commercial AC system, the electrical supply, isolators, and controls are included as part of the installation. This means one contractor, one point of responsibility, and a single Electrical Installation Certificate covering both the AC supply and any associated electrical work — simplifying the compliance paperwork significantly for the building owner or facilities manager.
Planned Preventive Maintenance for Commercial Electrical
The Electricity at Work Regulations 1989 require that electrical systems are maintained in a safe condition. For commercial premises, this means a documented PPM programme covering periodic inspection and testing (EICR every 5 years for most premises, annually for higher-risk environments), thermal imaging surveys for switchgear and distribution boards, and portable appliance testing (PAT) for moveable equipment. Kent Trade Solutions can provide a PPM schedule tailored to your premises, ensuring compliance and reducing the risk of unplanned downtime.
Why Kent Businesses Choose Kent Trade Solutions
Kent Trade Solutions is NICEIC-registered and carries out commercial electrical installations across Sittingbourne, Maidstone, Medway, Faversham, Sheerness, and the wider Kent area. All work is designed and installed to BS 7671:2018+A2:2022, and full certification is provided on completion. Because KTS also installs air conditioning, plumbing, and undertakes general building works, commercial clients benefit from a single point of contact for multi-trade projects — reducing programme risk and the management overhead of coordinating multiple contractors.
Kent Trade Solutions
NICEIC-registered Electrician & Refcom-certified AC Engineer, Sittingbourne, Kent
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