Restaurant Electrical Installation Cost UK 2025/2026: Catering Electrical Guide

A restaurant electrical installation is one of the most demanding commercial fit-out projects an electrician will undertake. The combination of high-draw catering equipment, wet and humid environments, life-safety systems (emergency lighting and fire suppression interlocks), and public access means every aspect of the design and installation must be executed to a higher standard than a typical office or retail premises.

All of the above must be designed, installed, inspected, and tested in accordance with BS 7671:2018+A4:2026 (the IET Wiring Regulations). Part 4 protection measures and appropriate IP ratings govern kitchen electrical installations. Note that Section 706 of BS 7671 (Conducting locations with restricted movement) applies to confined spaces such as the inside of metal vessels or tanks — not to commercial kitchens. BS 7671:2018+A4:2026 Reg 421.1.7 recommends arc fault detection devices (AFDDs) on AC final circuits of fixed installations to mitigate fire risk from arc fault currents, which is particularly relevant in a catering kitchen environment.

The single most important electrical decision in a restaurant fit-out is whether the existing supply is adequate for the catering equipment load. In most cases it is not, and a 3-phase supply upgrade is required before any other electrical work proceeds.

Commercial kitchen canopy extract systems have specific electrical requirements that go beyond simply wiring a fan motor. The extract system must be electrically interlocked with the gas supply and, where a fire suppression system is installed, with the suppression system controls.

Emergency lighting is a legal requirement in all restaurants, cafés, and catering premises open to the public. The applicable standard is BS 5266-1:2016 (Emergency lighting. Code of practice for the emergency lighting of premises). Non-compliance is a fire safety offence under the Regulatory Reform (Fire Safety) Order 2005.

Emergency lighting installation costs for a restaurant typically range from £1,200 to £4,500 depending on floor area, number of floors, and fitting specification. Self-test fittings cost more to supply but reduce ongoing maintenance costs.

Where a fixed fire suppression system is installed over cooking equipment (wet chemical Ansul-type systems are most common in UK commercial kitchens), electrical interlocking is mandatory. The suppression system activation must automatically cut power to all cooking equipment and gas supplies.

The electrical interlock wiring for a suppression system adds approximately £600–£1,500 to the kitchen electrical costs. This work must be documented and an Electrical Installation Certificate issued for all new circuits.

Most UK restaurants install CCTV for security, insurance compliance, and staff safety. The electrical requirements for a restaurant CCTV system are relatively modest compared to the kitchen installation but must be planned from the outset to avoid costly cable chasing after the fit-out is complete.

The table below reflects typical 2025/2026 costs for a new restaurant electrical fit-out in the UK. Prices include labour and materials but exclude VAT and DNO connection charges. London and South East rates are typically 20–35% higher than the national average, reflecting 2025/2026 labour cost escalation and skilled trade scarcity in the region.

DNO charges for a new 3-phase service can add a further £1,500 to £6,000. These are payable directly to the network operator and are separate from the electrician's quote.

2025/2026 labour rate escalation: Restaurant fit-outs in London and the South East have seen 15–20% labour cost increases since 2023, driven by rising material costs and ongoing scarcity of skilled electricians with commercial catering experience. London restaurant electrical fit-outs typically run 20–35% above the national average figures quoted above. Operators budgeting for a London or South East site should apply this uplift to all labour-inclusive line items.

DNO 3-phase upgrade lead times: Restaurants frequently need a 3-phase supply upgrade, and the DNO application lead time consistently catches owners off guard. Lead times for a new or upgraded 3-phase service range from 6 to 18 weeks depending on the network operator and the distance from the nearest 3-phase point. This application must be made at the very start of the project — before fit-out works begin — to avoid costly programme delays.

All new restaurant electrical installations must be accompanied by an Electrical Installation Certificate (EIC) issued by the installing electrician. For existing premises, periodic inspection and testing (EICR) is required at five-yearly intervals or on change of occupancy.

Restaurant fit-outs are high-value, multi-week contracts that generate strong revenue and excellent follow-on business (EICRs, emergency lighting maintenance, reactive call-outs). Electricians who develop expertise in catering kitchen installations — particularly 3-phase distribution, gas interlock wiring, and suppression interlocking — are in high demand.

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