Charlotte makes the booking process very easy. I love that you get a message the night before giving a 4 hour slot for the engineer visit and then on the day of the visit you get a message when the... See more
Company replied
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Review summary
Created with AI, based on recent reviews
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Reviews shaping this summary
We had our boiler moved as part of a loft conversion and Steve and Tom were both brilliant. They genuinely went above and beyond, were really professional throughout, and made the whole process easy a... See more
Company replied
Good service. Company kept in touch about timing. Clean tidy engineer who not only serviced our boiler bought from Diamond but service our gas fire thoroughly too. Excellent service, 9 years we have b... See more
Company replied
Diamond Green Energy installed 18 solar panels, inverter and battery storage. The work was more demanding on an old house. All members of the team were good to have onsite. They were quick to resolve... See more
Company details
- #10 of 45 best companies in Gas installation service
- #4 of 23 best companies in Air Conditioning Contractor
- #8 of 60 best companies in Gas engineer
- #14 of 74 best companies in Central Heating Service
- #14 of 120 best companies in Heating service
- #2 of 53 best companies in Solar Energy Company
Written by the company
We are a family run renewable energy company based in Fareham, Hampshire. Our approach has always been to provide an honest, trusted and reliable service to our clients and this has supported our business growth over the last 16 years. At Diamond Green Energy we ensure that all of our engineers are kept up to date with all the latest training offered by manufacturers, ensuring that our customers receive nothing but the best service. As a MCS registered company, we also offer you peace of mind. We strive to continually keep up to date with industry changes and new and innovative products that are entering the market so that we can offer our clients the best possible energy saving solutions. If you would like to discuss renewable energy solutions for your property or business
Contact info
Unit 4, Apex Centre, Speedfields Park, PO14 1TP, Fareham, United Kingdom
- 01329 234111
- info@diamondgreen.energy
- diamond-gas.co.uk
4.9
Excellent
3k reviews
Asks customers to review
This company invites their customers to review, whether positive or negative
Replied to 100% of negative reviews
Typically replies within 2 weeks
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
polite
Friendly polite engineer
27 April 2026
Pleaseant and polite and professional
21 April 2026
A great annual boiler service from…
A great annual boiler service from Diamond Green Energy, carried out by Rob. He was very polite and knowledgeable, and gave us a thorough explanation of the outcome of the service, I pay monthly which is cost effective. They always let you know a time window and text you when they’re on their way. I would recommend!
15 April 2026
Great service and all staff very…
Great service and all staff very friendly and polite and helpful
14 April 2026
Efficient as always
Efficient as always. I was kept informed about the appointment time. The service engineer was polite, timely and went through everything he had done and ensured I understood.
26 March 2026
Polite and professional engineer
Polite and professional engineer, excellent job done , knowledgeable and good communication ,would recommend diamond green energy to anyone
27 March 2026
The engineer was polite and tidy in his…
The engineer was polite and tidy in his operation.
17 March 2026
Reply from Diamond Green Energy Ltd
Thank you for choosing Diamond Green Energy to install your panel and battery system. We really appreciate your business.
Robert was brilliant very informative…
Robert was brilliant very informative polite and professional.
I highly commend this business Great team effort from Booking to providing certification.
17 March 2026
Reply from Diamond Green Energy Ltd
Thank you for taking the time to review us, your business is appreciated.
Diamond Green Energy gives perfect service
I have been using Diamond Green Energy for several decades and I have always found the service excellent. The engineers are polite, friendly and do a perfect job whether big or small and leave no mess. The company has moved with the times and the prices are competitive. I would recommend.
13 March 2026
Reply from Diamond Green Energy Ltd
Thank you for taking the time to review us, and for your continued support in using Diamond Green Energy. We really appreciate your business.
Boiler Installation
The chap who fitted the boiler was so polite friendly
and efficient. Nothing was too much trouble for him.
Steve Bell. And I can't recommend Diamond Green
Energy enough. Thank you to everyone. It was a pleasure to know you all.
28 February 2026
Reply from Diamond Green Energy Ltd
Thank you for taking the time to review us, and for choosing Diamond Green Energy to install your new boiler. The pleasure was all ours. Thanks again.
Engineer arrived between the time given…
Engineer arrived between the time given and was very polite. I showed him where the boiler was and he wanted to check the meters so he did that to. Service completed very professionally.
20 February 2026
Reply from Diamond Green Energy Ltd
Thank you for taking the time to review us. Your business is appreciated.
Reply from Diamond Green Energy Ltd
Thank you for choosing Diamond Green Energy
Reply from Diamond Green Energy Ltd
Thank you for choosing Diamond Green Energy
Always a great service from Diamond
Always a great service from Diamond , professional, polite and never Leave any mess. Highly recommend
10 February 2026
Reply from Diamond Green Energy Ltd
Thank you for choosing Diamond Green Energy
Excellent Service
Everybody I have dealt withfrom Diamond Green Energy has been pleasant & polite. Any queries I have had have been dealt with quickly & efficiently. My Aircon installation was very neat & tidy, & both engineers were pleasant & polite and as clean as you can expect from an installation like this.
29 January 2026
Reply from Diamond Green Energy Ltd
Thank you for your kind review. Hope you enjoy your new air con, especially on those hot days.
Very polite engineer
Very polite engineer, on time, great communication and easy booking and payment system
28 January 2026
Reply from Diamond Green Energy Ltd
Thank you for taking the time to review us.
Punctual polite and efficient service
28 January 2026
Reply from Diamond Green Energy Ltd
Thank you for taking the time to review us.
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