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Williams Electrics

5.0

95 Reviews

Opening Hours
Today - 08:00–18:00
  • Monday 08:00–18:00
  • Tuesday 08:00–18:00
  • Wednesday 08:00–18:00
  • Thursday 08:00–18:00
  • Friday 08:00–18:00
  • Saturday - Closed
  • Sunday - Closed

About

Based in Cardiff, Williams Electrics provides electrical services to domestic and industrial clients throughout Cardiff and the surrounding areas.

Although only established in 2009, the staff have many years of experience in the electrical/electronic industry.

Williams Electrics - all aspects of domestic, industrial electrical work, including replacement consumer units (fuse boards), house re-wiring, installing/changing light fixtures, additional sockets, external lighting, installation of power to garages and shed.

Please call to discuss the electrical work you need carried out in your home.

What we do

  • Electricians

    • Electrical installations
    • Electrical testing services
  • Lighting contractors

    • Outdoor lighting
    • LED lighting
    • Lighting LED upgrades
  • More Services

    • design and rewire of control panels
    • external lighting

Customer reviews

Why you can trust these reviews

All reviews are verified as being genuine and a true customer of this trader.

How can we be so sure?

100% of the reviews we publish have been through our stringent moderation process.

5.0
95 reviews
Customer Service
5.0
Quality
5.0
Value
5.0
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Hot stuff
Customer Service
Quality
Value
Some nameless idiot installed a boiler system that had an immersion heater as a back up/alternative. That was in theory sensible...but not if you fail to do the necessary wiring! Mark went about putting this right, replacing the redundant parts with a circuit that works. It's a blessing to find an electrician who understands electrics and sorts things. Fairly priced as well.
Customer in Cardiff Posted on 24/07/2026 , work completed 22/07/2026
Fantastic Service (as always)
Customer Service
Quality
Value
Another fantastic service from Mark. The most recent job was removing an old oven and installing the new one. He is always quick to reply to requests and equally speedy at visiting the house to provide the service. Over the years, we have asked Mark to do several jobs around the house, and he has always been communicative, efficient, prompt, reliable and highly skilled. In fact, we would never consider asking another electrician. Mark is always happy to answer any questions and explain everything in a way that I can understand. Thank you Mark
Customer in Cardiff Posted on 16/07/2026 , work completed 15/07/2026
Professional and helpful
Customer Service
Quality
Value
Mark recently fitted new recessed downlights for us, and we were very pleased with the service provided. Mark was professional throughout, clearly knowledgeable, and took the time to offer us additional help and advice. The installation was carried out efficiently and to a high standard, with great attention to detail. We would have no hesitation in recommending his services.
Customer in Posted on 23/04/2026 , work completed 23/04/2026
Done - fast, full, and accurate
Customer Service
Quality
Value
We had non-functioning electricals - bathroom light fixture and a fan. Mark is local to us, was able to make a near-term plan, showed up as arranged, and did the installation. The fee for parts and labour was reasonable. Should other matters arise, we would ring him.
Customer in Cardiff Posted on 16/03/2026 , work completed 11/03/2026
Good work by Trusted Trader
Customer Service
Quality
Value
Mark came to do several jobs just 5 days from our request. Very good advice given and then work carried out to high standard. Reasonable charge without any call-out charge added. We found Mark on Trusted Trader, so it shows how useful it can be.
Customer in Cardiff Posted on 25/02/2026 , work completed 20/02/2026
Great experience upgrading consumer unit
Customer Service
Quality
Value
We were recommended to Mark by a neighbour, and he has been helpful and courteous from our first interaction. We needed the consumer unit in our house upgraded, and Mark helped us understand the requirements and work with national grid ahead of the installation. On the day, Mark kept us informed of progress - finishing the work on time and to a high standard, all while also answering my many questions!
Customer in Cardiff Posted on 08/02/2026 , work completed 04/02/2026
Great Work (as usual) - Would highly recommend
Customer Service
Quality
Value
Great Work (as usual) - Would highly recommend Over the years, we have requested Mark's services many times. Each time, we have been impressed with his prompt, efficient, no-faff expertise. He is always reliable and prices are very reasonable. He is clearly very knowledgeable and takes the time to explain things clearly to customers (which is very helpful for people like me who know little about electrics). Even though we initially called Mark for 1 issue, he ended up solving 3 separate issues.... all within 24 hours of contacting him. Thanks again Mark!
Customer in Cardiff Posted on 29/01/2026 , work completed 29/01/2026
Updating Flat electrics Cardiff
Customer Service
Quality
Value
Finding a good, reasonably priced electrician is a nightmare. Williams Electrical was a wonderful find. Mark visited to assess the work, he gave me a time and materials guide price and followed it up with a written estimate promptly. We agreed on a time to do the works and he communicated well when he had to make a small rearrangement to the timing. He was personally charming and someone one feels happy to have in your property. The work was done as described and in good spirit on time. He is tidy in his work and disrupted me as little as possible. The work was completed, and an invoice itemising materials and labour costs in detail was issued to me within 24 hours. He forwarded the electrical certificate and Building control notice immediately. It felt like a very professional service all round, and he is a pleasure to have around. I have no reservations in recommending him, and he will undertake other works for me. The first tranche of work inc new updated consumer unit (fuse box), adding plug outlets, and earthing to gas and water supplies. His pricing is sensible and good value.
Customer in Caerdydd Posted on 29/01/2026 , work completed 22/01/2026
Fire Alarms fitted efficiently and quickly
Customer Service
Quality
Value
This is the second time Mark has done work for us. This time he sourced and installed new fire alarms throughout the house. He was punctual, efficient and the price was very fair. I would highly recommend him to others- he's a thoroughly nice man, very straightforward to deal with and completely reliable.
Customer in Cardiff Posted on 08/01/2026 , work completed 08/01/2026
Reliable & Courteous Electrician
Customer Service
Quality
Value
Mark did electrical work at both my house and my mum’s house. This is the second time I have used Mark for electrical work. He is reliable and polite and completes the work in a timely manner. He provides advice on best lighting / solutions. He purchased the lighting fitments on my behalf (saving me time & effort working out the best option). Reasonably priced. I would recommend Mark and will use him again in the future.
Customer in Cardiff Posted on 02/11/2025 , work completed 22/10/2025