GM Electrical Service
Guildford, Surrey
Checkatrade member since November 20165
Services
- House Rewiring
- Electric Showers
- Electric Cookers
- Storage Heating
- Fuseboard / Consumer Unit Installation
- Smoke Alarms
- Immersion Heater Installation
- Electric Range Cookers
- Electric Stoves
- Emergency Lighting
- Fault Finding
- Electric Heating
- Electric Radiators
- Energy Efficient Lighting
- Electrical Under Floor Heating Installation
- Electrical Heater Repair
- Electric Vehicle Charger Installation
- Electric Smart Thermostats
- Garden Lighting
- Lighting Design
- Hot Tub Wiring
- LED Lighting
- Emergency Electrician Service
- Fuseboard / Consumer Unit Repair
- Electric Sockets
- Extractor Fans
Customer Reviews
Write a review9.96 /10
Based on 46 reviews over the past 12 months
Quality of work
9.93
Reliability
9.98
Communication
9.98
What customers are saying
AI-generated from customer reviews over last 24 months
Customers consistently describe this trade as professional, reliable, and punctual, carrying out work to a very high standard. Reviewers also frequently highlight their excellent communication and how clean and tidy they leave the workspace.
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Reviews (767)
10 Exceptional electrical service.
Posted 14 March
Job location: GU21Exceptional service. Gary suggests and carries out very efficient and cost-effective solutions to electrical problems. He always comes promptly and is extremely helpful.Response from GM Electrical Service
Thank you very much for taking the time to complete feedback, following Garry's recent electrical work. We are pleased that you were happy with the service we provided.
- SSimon B
10 Replacement consumer board and full check all now compliant with current regs.
Posted 28 February
Garry is perfect gentleman, all work carried out with perfection, clean and tidy and everything explained in laymen's terms, wouldn't hesitate in using again or recommending to others.Verified reviewerJob location: GU24Response from GM Electrical Service
Thank you very much Simon for taking the time to give your feedback on the work carried out. We are pleased that you were happy with the electrical installation.
10 Whole house rewire
Posted 16 February
Job location: GU8I have known Gary from working with him several years ago. Just before Christmas our electric kept tripping I phoned him on the off chance and he dropped everything to have a look ,but after trying for a couple of hours said we needed a complete rewire. We booked him for the start in early February he turned up when said and done a brilliant clean job and even managed to do the kitchen without taking any kitchen tiles off which we thought we might have to . I would recommend him to anyone and also Paul who helped Gary is very nice as as well and one last thing ,cinnamon buns helpResponse from GM Electrical Service
Thank you for taking the time to provide feedback Martin. We are pleased that you were happy with the work completed by Garry and Paul for the rewire.
10 Excellent service – professional, reliable, and friendly
Posted 10 January
Job location: GU22I’m very happy with the service from GM Electrical Service. Garry was professional, punctual, and carried out the electrical work to a very high standard. Communication was excellent throughout, and the job was completed promptly. Katy was also great on the customer service side – friendly, helpful, and efficient. A reliable and trustworthy company that clearly takes pride in their work. I wouldn’t hesitate to recommend them and will definitely use their services again.10 Expert Electrician
Posted 18 December 2025
Garry Markham was recommended to us as unusually expert in his field and indeed he has carried out work for us which was very effective, undertaken very quickly and with the minimum of disruption. On this occasion he installed an up-to-date (fuse board) consumer unit to bring us into compliance with today's standards. He was flexible when we wanted to adjust the timing of the work and charming as ever.Verified reviewerJob location: GU5- MMichael D
10 Garry fitted outside lights in my garden along my driveway.
Posted 10 December 2025
The whole process from initial meeting, to estimate to completion was faultless. We are very happy with the end result.Verified reviewerJob location: GU23
Photos
Company Info
Owner
Mr Garry Markham
Sole Trader
10 years on Checkatrade
VAT Registered
Yes: 307029528
We are a small independent electrical company, based in Guildford and have been in business since 2015, having worked in the building trade for many years.
We cover a 15-mile radius around Guildford, and we pride ourselves on our punctuality, if we say we will attend, then we always do.
We are certified by NICEIC, which means our work is set to a very high standard and adheres to the current IEC wiring regulations.
City & Guilds qualified including Level 3, 18th edition.
We carry out all domestic electrical work and specialize in external lighting and power systems.
Our team is passionate about
- providing high standards of workmanship (we offer a 12-month guarantee on our work from the date of completion)
- customer satisfaction.
We pride ourselves on being
- reliable
- responsive
- professional
- punctual
- honest
- tidy, showing you and your property the utmost respect.
NO call out fees, no job is too small. Please don't hesitate to contact us.
Accreditations and awards

This trade passed up to 12 Checkatrade vetting checks
Member since November 2016
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