Reliable & Courteous Electrician
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
Recommended
Great work.
I recently contacted Mark for the first time to remove two ceiling lights and install two new ones. He arrived on time on the day agreed. He worked quietly and efficiently to do the work. A problem was detected with an existing dimmer switch for one of the new lights. Luckily I had a replacement light switch in the house , which Mark was able to install with no problems. All the work was completed and I am very happy with work. I would have no hesitation in using Mark for any other electrical work.
Customer in Caerdydd
Posted on 30/10/2025
, work completed 27/10/2025
Recommended
Precise & Professional
Mark was able to fit a new socket and change another with very short notice. All options and steps were described to us and the work was carried out to a high standard and with no mess.
Customer in Cardiff
Posted on 21/10/2025
, work completed 13/10/2025
Recommended
Works quietly and diligently and solves problems
We have used Mark before as Electrician of choice. On this occasion we needed some sockets repositioned, some sockets installed where there were no existing sockets, and electrical leads resting on top of the kitchen cabinets needed to be tidied up. In addition, we needed Mark to track down why one particular electrical circuit which powered the garage, tripped on an infrequent basis. This was a particularly difficult task because at times the circuit would trip, meaning there was no way to access the garage. If only the garage had an entrance from the house, or from the garden we would have been able to get into the garage. In the end, Mark dismantled some of the overhead door and was able to detach the garage door motor to enable the door to be opened manually. Once inside the garage, Mark was able to rectify the problem. Mark can be relied upon to work quietly and diligently, and keeps the customer advised throughout.
Customer in Cardiff
Posted on 09/10/2025
, work completed 08/10/2025
Recommended
Excellent and professional
We had no electricity in our kitchen, especially fridge and freezer , and in our dinning room. Mark found out the problem and managed to fix everything. It was not easy as we live in an old house. Mark was very patient, explained what he was doing and job done. 👍 We are very grateful and pleased with his service. We will definitely call him again , and definitely recommend him to everyone that we know.
Customer in Cardiff
Posted on 01/10/2025
, work completed 30/09/2025
Recommended
An efficient and professional service
Mark came to repair two malfunctioning lights at our home. He arrived promptly and was courteous and thorough, explaining the problems, and what he intended to do, which he did speedily. His charges were most reasonable, and I heartily recommend him to anyone looking for an excellent electrician in the Cardiff area.
Customer in Cardiff
Posted on 30/09/2025
, work completed 30/09/2025
Recommended
Excellent service
Excellent service. Work was explained carefully and carried out efficiently. Parts were available quickly and nothing was too much trouble.
Customer in Cardiff
Posted on 05/09/2025
, work completed 02/09/2025
Recommended
Hat Trick of Successful Visits
This was the third occasion we have called upon Mark, and it was every bit as successful as the previous visits. He fitted a new double plug socket for which he provided an electrical certificate, installed a heat alarm, and diagnosed and fixed a problem with our cooker hood. Mark always explains what he proposes to do before starting, and his charges are very reasonable.
Customer in Caerdydd
Posted on 16/08/2025
, work completed 12/08/2025
Recommended
Highly Recommended
Professional, trustworthy and thorough. Mark came out at short notice to diagnose a tricky problem with our domestic electrics and was determined to fix the issue, which he did successfully in very little time at all. Replaced two sections of wiring and got our downstairs socket circuit back up and running. Will definitely contact him again if we require any further electrical work, and will recommend him to everyone we know locally!
Customer in Cardiff
Posted on 03/08/2025
, work completed 31/07/2025
Recommended
Excellent Service
Mark fitted a PIR light by our front door. He arrived promptly, did a great job and was a pleasure to deal with. I will definitely use him again for any electrical work and would recommend him to my friends.
Customer in Cardiff
Posted on 29/07/2025
, work completed 28/07/2025
Recommended
Expert Electrical Engineer
He is an expert electrical engineer who can solve any electrical problem. Fixed two fiddly problems for me. Great work from a master in his field.
Customer in Cardiff
Posted on 12/06/2025
, work completed 11/06/2025
Recommended
Good job done
We asked Mark to fit an induction hob where a gas hob had been. The work turned out to be non-trivial and needed difficult cutting of the worktop. He worked away diligently - it took him about four hours to complete the fitting. He was concerned to get things right, such as fitting an isolation switch for the oven that is fed by the same cable as the hob. We were very pleasantly surprised at how reasonable the cost was. We propose to use him if we need other electrical work done.
Customer in Cardiff
Posted on 22/04/2025
, work completed 17/04/2025
Recommended
Highly recommended
I have used Mark since 2018 and will continue to do so (he is trustworthy knowledgeable and professional) for all electrical work e.g Creating extra sockets (other electrician quotes said couldn’t be done) but Mark said can be done Extra spotlights fitted Double outside electric socket fitted. He has recently done work on my daughter's new property New bathroom light fitting after his advice on what to go with Fitted upgraded electric wall heaters, a fabulous job done so pleased. 5* service advice. No job is too big or small. Thank you again
Customer in Cardiff
Posted on 18/02/2025
, work completed 17/02/2025
Recommended
Three small repairs
I rang Mark on the recommendation of a neighbour, to ask whether he could do two small electrical repairs, namely mend two pull switches, one of which had stopped working altogether and the other which had developed an intermittent fault. Mark was happy to agree and a mutually convenient time was agreed for him to call. He arrived on time and was very pleasant and helpful in person. He had brought replacement parts with him, which he fitted. He completed the two jobs quickly and cleaned and tidied up. Meanwhile, we had remembered that the front door bell was intermittently faulty, so we asked if he could look at that for us. This needed a replacement part and he checked our choice with us before buying it. We felt what he charged was very reasonable and we are very happy to recommend him.
Customer in Cardiff
Posted on 15/02/2025
, work completed 13/02/2025
Recommended
Another good job
We have used Mark many times in the past - always on time and he leaves his workspace clean and tidy. He is our first choice electrician!
Customer in Cardiff
Posted on 19/12/2024
, work completed 04/12/2024
Recommended
First Class Service
Mark delivered the perfect service, from start to finish. Contacted Mark on the back of super high reviews from my family. His communication from the start was exemplary: quick to reply and clear with his messaging. The work undertaken involved removing alarm systems, adding electrical sockets and updating existing electrics. Mark started the work promptly and finished within the pre-estimated timeframe. The finish is of the highest quality and we’re super pleased with the outcome. Mark’s friendly, yet professional demeanour put us at ease and overall, I can’t recommend his services highly enough. Massive thanks for your work!
Customer in Cardiff
Posted on 28/11/2024
, work completed 28/11/2024
Recommended
Second to none
Customer in Cardiff
Posted on 30/09/2024
, work completed 16/09/2024
Recommended
Excellent electrician
Having tried to contact electricians in Bridgend where I live but receiving no response to telephone calls, emails, messages left, I decided to try Cardiff and found Mr Williams on Which Trusted Trader. He returned my call within hours and came and carried out the work I required within a week. He is an excellent electrician, the work was all completed to a very high standard and he was happy to give me advice on other aspects of electrics. Even though he had to travel several miles to my house, his price for all the jobs which took a few hours, was extremely fair. Mr Williams was a very pleasant and efficient electrician and cleared up after the work was finished. I would use him again 100%.
Customer in Bridgend County Borough
Posted on 25/09/2024
, work completed 24/09/2024
Recommended
Great Service
After being let down by other electricians, a family member recommended I contact Mark as he had recently undertaken work for them to which they had been very impressed with his services. Mark lived up the the hype! Not only was the work that Mark did excellent but I was also really pleased with how quickly he was able attend the house and complete the work. His communication was excellent and costs were very reasonable. Will definitely use Marks services again for any future work needed.
Customer in Cardiff
Posted on 05/01/2024
, work completed 02/01/2024
Recommended
Excellent, reliable service.
Mark has visited my home twice to replace downlighter fittings in my kitchen and replace a faulty extractor fan in a downstairs toilet. He responded promptly to my enquiries and arrived punctually at the agreed time to complete the work. He is reliable, professional and fairly priced. I would recommend him to friends and family.
Customer in Cardiff
Posted on 24/11/2023
, work completed 23/11/2023
Recommended
First class trader
Mark has come to our rescue several times in the past. On this occasion, he came at very short notice, to identify the cause of the noise in our cooker hood, and to advise on, and install, new down lighting in the kitchen. All work was completed in good time, at very reasonable cost, with Mark always arriving on time. As well as being an excellent electrician, he is good company when working, and made friends with our very lively Jack Russell terrier. Highly recommended.
Which? Trusted Traders Consumer
Posted on 13/11/2023
, work completed 08/11/2023
Recommended
Great work and reliable
I would recommend Mark Williams as an electrician, he is very reliable, honest and efficient. He replaced a fan today in my bathroom and I am very pleased with the result.
Customer in Vale of Glamorgan
Posted on 26/09/2023
, work completed 26/09/2023
Recommended
Thorough and Efficient
Returned from vacation this year to find the power off and the contents of the freezer evolving into new life forms. Over the following few days the power continued to trip off at apparently random intervals, so we called in a professional. Mr Williams was thoroughly courteous and competent, working tirelessly to identify the source of the fault, then propose and implement an effective solution. The work was completed in good time with a minimum amount of disruption, and the costs were very reasonable.
Customer in Cardiff
Posted on 04/09/2023
, work completed 22/08/2023
Recommended
Excellent service all round!
Mark provides the service and professionalism that you hope for but seldom get. Would recommend his service without question.
Customer in Cardiff
Posted on 03/09/2023
, work completed 24/08/2023
Recommended
Excellent service
Mark was very professional and friendly. He came to connect our summerhouse consumer unit to the main unit and fit an internal and external light fitting. We were very pleased with the quality of work that Mark did. We would definitely use him again and would highly recommend his services.
Customer in Cardiff
Posted on 25/06/2023
, work completed 12/06/2023
Recommended