How to Choose the Best Electrician in London: The Complete Checklist

Here is the short version: the safest way to choose an electrician in London is to check they are registered with a government-approved scheme, insured, and willing to put everything in writing before a single wire is touched. Anyone can call themselves an electrician. There is no law stopping an unqualified person from picking up a screwdriver and charging you for the privilege. What separates a proper electrician from a cowboy is paperwork, and thankfully most of it takes about two minutes to check.

I am Ali Elm, and I handle compliance, quoting and project delivery at Capital Electricians. I spend a lot of my week seeing the aftermath of bad wiring done by someone who cut corners. So here is the honest checklist I would use if I were a London homeowner or landlord hiring an electrician I had never met.

1. Check they are registered with a government-approved scheme

This is the single most important box to tick, so start here. In the UK, competent electricians register with a government-approved scheme such as NICEIC or NAPIT. Registration means they have been independently assessed and their work is checked on a regular basis, not just signed off once and forgotten.

The good news is you do not have to take anyone's word for it. You can verify a firm in about a minute. Use the NICEIC tool to find or check a registered NICEIC business, or search the NAPIT database to verify a registered installer. According to Electrical Safety First, registered electricians work to the BS 7671 safety standard, are regulated by government, and carry insurance that protects you.

If a firm cannot give you a scheme name and a registration number, that tells you what you need to know.

2. Confirm they can self-certify Part P work

What is Part P?

Part P is the section of the Building Regulations that covers electrical safety in the home. Most electrical work in a dwelling has to comply with it, and certain jobs are "notifiable", meaning building control has to be told before work starts.

The Planning Portal is clear that it is best to use an installer registered with a competent person scheme, because they can self-certify their own work as compliant. That saves you a separate building control fee and a lot of hassle. Notifiable jobs include a new consumer unit, a complete new circuit, and work in "special locations" like bathrooms. The official Approved Document P spells out exactly when notification is required.

This matters most on bigger jobs. If you are planning a full or partial rewire or a consumer unit upgrade, self-certification by a Part P registered electrician is what keeps you the right side of the regulations.

3. Ask for proof of public liability insurance

Good electricians carry public liability insurance. It is there to protect you if something goes wrong, whether that is damage to your property or, in the worst case, an injury. Registration schemes generally require it, but there is nothing wrong with asking to see the certificate.

A reputable firm will not bristle at the question. If someone gets defensive about proving they are insured, treat that as a quiet answer in itself.

4. Get a written, itemised quote, not a vague estimate

A scribbled figure on the back of a business card is not a quote. What you want is a written breakdown that lists the work, the materials, the labour and the total, so you can see exactly what you are paying for.

Itemised quotes also make it far easier to compare firms fairly. Prices vary across London, and a written quote protects both sides if the scope changes later. If you want a sense of what jobs typically run to, our guide on how much an electrician costs in London breaks down the common jobs. Be wary of a number that looks far cheaper than everyone else's, because cheap electrical work has a habit of getting expensive.

5. Make sure you get a certificate when the job is done

Certificates are not optional extras. They are proof the work is safe and compliant. For new installations or alterations, you should receive an Electrical Installation Certificate. For an inspection of an existing installation, you get an Electrical Installation Condition Report, better known as an EICR.

Landlords need to pay particular attention here. An up-to-date EICR is a legal requirement for rented homes in England, and it is the document your tenants and local council will ask for. We cover this in detail in our overview of landlord electrical safety certificate requirements, and it feeds directly into our landlord electrical services. No certificate means no proof, and no proof can mean trouble at insurance or sale time.

6. Check reviews and ask for references

Registration proves competence. Reviews tell you what the person is actually like to have in your home. Read a spread of them rather than fixating on a single glowing line, and look for comments about tidiness, timekeeping and how problems were handled.

For a larger job, there is nothing unreasonable about asking for a reference or two from recent customers. A busy, honest electrician will have plenty of people happy to vouch for the work.

7. Ask the right questions before you commit

You do not need to be an expert to ask sharp questions. You just need to know which ones to ask. Here is a short list that separates the professionals from the pretenders.

1. Which government-approved scheme are you registered with, and what is your registration number?
2. Are you Part P registered so you can self-certify the work?
3. Do you carry public liability insurance, and can I see the certificate?
4. Will I get a written itemised quote before you start?
5. What certificate will I receive when the job is finished?
6. Have you done this type of work in my area recently?

The answers matter, but so does the reaction. A qualified electrician answers these calmly because they hear them all the time.

8. Value local knowledge

London is not one place, it is thirty-two boroughs with very different housing stock. A flat in a converted Victorian terrace in Islington throws up different wiring quirks than a purpose-built block in Croydon. An electrician who works across the capital every day knows what to expect behind your walls.

Local also means reachable. When a fault leaves half your house without power, you want someone who can actually get to you, which is exactly why a genuinely local emergency electrician beats a firm that has to drive in from two counties away.

Red flags: how to spot a cowboy

Most bad hires give themselves away early. Watch for these.

• Cash only, no paperwork. If someone will only take cash and refuses to provide a receipt, invoice or certificate, walk away.
• No registration number. A refusal or a vague "we're all qualified, don't worry about it" is a hard no.
• Pressure to decide now. High-pressure tactics and "today only" pricing belong in a dodgy car showroom, not your fuse box.
• A quote far below everyone else. Sometimes it is a keen price. Often it is a corner about to be cut.
• Won't put anything in writing. No written quote and no certificate promised means no accountability.
• Can't be verified. If their name does not show up on a scheme register, believe the register.

Frequently asked questions

How do I check if an electrician is qualified?

Search for their business on the register of the scheme they claim to belong to. You can check a registered business with NICEIC or search the NAPIT installer database using the firm's name or registration number. The government also points people to a single register of registered competent electricians so you can confirm someone is genuinely assessed and monitored.

Is NICEIC registration a legal requirement?

Registration with a specific scheme is not compulsory by name, but the work still has to comply with Part P of the Building Regulations and the BS 7671 wiring standard. Using a registered competent person is simply the easiest way to be sure it does, because they can self-certify compliance rather than you paying building control separately.

What certificate should I get after electrical work?

For new installations and alterations you should receive an Electrical Installation Certificate. For an inspection of an existing installation you get an Electrical Installation Condition Report, or EICR. Keep these safe, as you will need them for insurance, for selling, and if you are a landlord, for your legal obligations.

Why should I avoid cash-only electricians?

Cash in itself is not the problem. The problem is when cash comes with no invoice, no quote and no certificate, because you are left with no proof and no protection if the work turns out to be unsafe. Proper firms are happy to document what they do.

Do I really need a registered electrician for small jobs?

Some minor work is not notifiable, but it still has to be safe and meet BS 7671. Certain jobs, like a new consumer unit or work in a bathroom, are notifiable and are far simpler when a Part P registered electrician handles the certification. Our guide to Part P building regulations explains where the line sits.

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Run any London firm through this checklist and the good ones stand out fast. For what it is worth, Capital Electricians is built to tick every box on it. We are NICEIC registered, all our work is carried out to the BS 7671 wiring standard and is Part P compliant, we quote in writing, we issue the proper certificates, and we cover every London borough. We trade as CAPELEC GROUP LTD, UK company number 17180050, so you can verify us on the public record too. If you would like a written quote from an electrician who meets every check on this list, call us on 020 3653 2600.