Commercial Electrical Work
Commercial Electrical WorkAcross Stevenage & the East of England
From a single faulty circuit to LV panel board installations in large warehouses, commercial sites get electrical work quoted properly, tested fully, and signed off cleanly: with cover you can show your insurer.
Rated 4.95 out of 5 on TrustATrader · NICEIC Approved Contractor
20 yrs
experience
£10m
public liability cover
£10m
employers' liability cover
4.95/5
TrustATrader rating
12 mo
workmanship guarantee
The service
Commercial electrical work, scaled to the job
Linehan Mechanical & Electrical Ltd, trading as Linehan Electrical, covers the full range of commercial electrical work, from small office repairs to LV panel board installations in large warehouses. Gary Linehan has 20 years in the trade, and the team scales up for bigger projects, having run crews of over 25 on major works.
The business is an NICEIC Approved Contractor, independently assessed against the national standard for electrical contracting, and carries £10m public liability and £10m employers' liability insurance: the kind of cover commercial clients and site managers need to see before work starts.
Commercial clients range from small business premises needing a fault fixed or sockets added, through to larger sites needing LV panel boards, distribution upgrades or full installations. Mechanical, plumbing and associated works are offered alongside electrical on larger projects, with F-Gas and Gas Safe elements delivered by registered subcontractors.
Every commercial job starts with a free quote, photos for smaller works, a site visit for anything larger, so costs are agreed before work begins, with a 10% deposit on bigger projects and payment terms of 14 days from completion.
If it's left
Common commercial electrical issues
Commercial premises carry higher loads and more complex circuits than domestic properties, so problems tend to be more disruptive when they happen.
Unplanned downtime
An electrical fault on a commercial site can stop production, close a shop floor, or take out IT and refrigeration | all with a direct cost to the business.
Overloaded distribution boards
As premises add equipment over the years, boards installed for a lighter load can become overloaded, increasing the risk of nuisance tripping or failure.
Ageing LV infrastructure
Older panel boards and switchgear in warehouses and industrial units can fall behind current standards and become harder to source parts for.
Non-compliant previous work
Work carried out by unqualified contractors in the past can fail an EICR and create liability for the current occupier or landlord.
Poor record-keeping
Without up-to-date certification and test records, it's harder to prove compliance to insurers, landlords or enforcement bodies.
Lighting and power gaps as a business grows
Units adapted for new layouts, new equipment or new staff numbers often need additional circuits that weren't part of the original design.
Common mistakes we see
- ×Delaying an EICR until an insurer or landlord demands one
- ×Using whoever's cheapest without checking accreditation or insurance
- ×Letting in-house staff carry out electrical work without qualification
- ×Not planning for future load when installing a new panel board
- ×Ignoring recurring nuisance trips instead of investigating the cause
- ×Treating electrical work as an afterthought in a fit-out programme
How we work
How commercial jobs are run
- 01
Scoping and site visit
Larger commercial jobs start with a site visit to understand the building, existing infrastructure and any access or timing constraints.
- 02
Quote and planning
A free, detailed quote is provided, with a 10% deposit required on larger projects before work is scheduled.
- 03
Installation or repair
Work is carried out to BS 7671, with the team scaling up to meet programme deadlines on bigger installations.
- 04
Testing and commissioning
All work is tested and commissioned before handover, with certification supplied for your records and compliance files.
- 05
Handover and guarantee
Workmanship is guaranteed for 12 months. Equipment installed carries its own manufacturer warranty, which varies by product.
What you get
Why commercial clients use Linehan Electrical
Scales with the project
The team flexes with workload, having run crews of over 25 on major works, so larger jobs don't stall for lack of hands.
Properly insured
£10m public and £10m employers' liability insurance gives site managers and main contractors the cover they need.
NICEIC Approved Contractor
Independent assessment against the national standard, useful for procurement and compliance records.
Minimal disruption
Work is planned around site operating hours where possible, to limit downtime on live premises.
Full testing and certification
Every job is tested and documented, giving you paperwork for insurers, landlords and compliance audits.
One contact throughout
Gary and the core team stay involved from quote to completion, rather than handing the job between different people.
In detail
What commercial electrical work covers
Commercial electrical work spans small reactive repairs through to large installations. Here's what's typically involved.
LV panel boards and distribution
LV (low voltage) panel board installation covers the distribution equipment that feeds power around larger commercial and industrial buildings: warehouses, factories and multi-unit sites. This includes installing new boards, upgrading existing distribution, and tying new circuits into existing infrastructure safely.
This kind of work is planned carefully around isolation and switching sequences, since taking down distribution on a live site affects everyone downstream of it. Where possible, work is scheduled outside operating hours to limit disruption.
Materials and standards
Commercial installations use cable, containment and switchgear rated for the expected load and environment: steel conduit and tray in industrial settings, for example, versus surface or concealed containment in offices and retail.
All work follows BS 7671 wiring regulations and relevant building regulations, with testing and inspection carried out and documented to the same standard regardless of site size.
Small works and reactive repairs
Not every commercial job is a large installation: faulty sockets, failed lighting circuits, tripping breakers and general fault finding make up a steady share of commercial work, often on a call-out basis.
The £120 call-out charge (including the first hour, then £50 per hour) applies to commercial premises in the same way as domestic, giving a predictable starting cost for smaller reactive jobs.
Fit-outs and refurbishments
Office and retail fit-outs typically need full rewiring of power and lighting circuits to match a new layout, often coordinated with other trades such as partitioning, ceilings and flooring.
On these jobs, electrical work is usually sequenced early, before finishes go in, with final connections and testing done once other trades have cleared the area.
Residential vs commercial differences
Commercial sites typically carry heavier loads, three-phase supplies, and more complex distribution than domestic properties, which changes both the materials used and the planning needed around isolations.
Commercial work also tends to involve more coordination, with facilities teams, other contractors, and site access or permit-to-work procedures, compared with a straightforward domestic visit.
Maintenance and ongoing support
Commercial electrical installations need periodic inspection to stay compliant and safe, particularly where equipment or layouts change over time. Scheduling testing in alongside other planned maintenance avoids unexpected downtime later.
Fault finding on commercial sites follows the same methodical approach as domestic work: isolating circuits and testing systematically rather than replacing equipment on guesswork, which keeps costs under control on larger sites with multiple distribution boards.
Related services
Questions
Frequently asked questions
How much does commercial electrical work cost?
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Small reactive jobs start with a £120 call-out including the first hour, then £50 per hour. Larger installations, including LV panel boards, are quoted per job after a site visit, free of charge.
Do you quote before any work starts?
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Yes, every job gets a free quote. Smaller jobs can be quoted from photos; larger commercial projects need a site visit to scope properly.
How long does a commercial installation take?
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This depends entirely on the scope of the job. Timelines are set out in the quote once the site has been assessed.
Is commercial work guaranteed?
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Yes, all workmanship carries a 12-month guarantee, and installed equipment carries its own manufacturer warranty, which varies by product.
Can you work outside normal site hours?
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The phone line is answered 24 hours a day on +44 7855 954229 to discuss scheduling, and larger jobs are planned around your site's operating hours where possible.
Do you work with main contractors?
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Yes, Linehan Electrical works as an electrical subcontractor on larger projects as well as directly for building owners and occupiers.
What areas do you cover for commercial work?
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Stevenage and across Hertfordshire, plus Bedfordshire, Cambridgeshire and London.
Do you handle mechanical and plumbing work too?
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Mechanical, plumbing and associated works are offered alongside electrical, with F-Gas and Gas Safe elements on larger projects delivered by registered subcontractors.
What's the payment process for larger jobs?
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A 10% deposit is required on larger projects, with payment terms of 14 days from completion.
Do you provide testing and certification?
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Yes, all work is tested and commissioned, with paperwork supplied for your compliance and insurance records.
Get a free quote for your commercial site
Tell us about the project or send photos of the issue, and get a free, no-obligation quote. Call Gary any time on +44 7855 954229.
- NICEIC Approved Contractor
- 12-month workmanship guarantee
- 4.95 on TrustATrader