Endorsed by Which?

Allstar Systems (Norwich) LTD

5.0

117 Reviews

Opening Hours
Today - 24 hours
  • Monday - 24 hours
  • Tuesday - 24 hours
  • Wednesday - 24 hours
  • Thursday - 24 hours
  • Friday - 24 hours
  • Saturday - 24 hours
  • Sunday - 24 hours

Organisations and Awards

Aug 2019

About

Established in 2011, Allstar Systems is a trusted plumbing, heating, and renewable energy specialist based in Norwich and serving customers across Norfolk.

We deliver high-quality boiler installations, servicing, repairs, central heating upgrades, hot water systems, bathrooms, plumbing services, and renewable heating solutions for domestic and commercial clients.

Our experienced engineers take pride in providing honest advice, reliable workmanship, and exceptional customer service. Every project receives careful planning and attention to detail, ensuring efficient, long-lasting results.

We are proud to hold industry-leading accreditations, including Gas Safe, OFTEC, Worcester Bosch Accredited Installer, Which? Trusted Trader, Trust Mark, Norfolk Trusted Trader, CHASElite, SafeContractor, CIPHE, and Anglian Water Approved Plumber status.

What we do

  • Plumbers

    • Emergency plumbing services
    • Unvented cylinder installation and maintenance
    • Water softener installation and maintenance
    • Appliance Installation
    • Bathroom Plumbing
    • Drainage Services
    • Heating System Installation
    • Leak Detection
    • Plumbing Fixtures
    • Water Heater Repair Services
  • Heating contractors

    • Central heating systems (installation and servicing)
    • Oil fired heating equipment
    • Automated Heating
    • Immersion Heaters
  • Boiler, central heating and gas engineers

    • Boiler installation
    • Boiler repair
    • Boiler servicing
    • Radiators and central heating
    • Gas safety testing and inspection
    • Gas cooker installation
    • Gas cooker repair
    • Gas emergencies
    • Gas fire repair and servicing
    • Immersion Heaters
    • Power flushing
    • Underfloor heating
  • More Services

    • lpg heating

Customer reviews

Why you can trust these reviews

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

5.0
117 reviews
Customer Service
5.0
Quality
5.0
Value
4.9
Sort by
Review for Boiler Service
Customer Service
Quality
Value
Just wanted to say a big thank you for servicing our oil boilers. The job was done thoroughly. You checked the oil quality and pressures, changed the nozzles, and left everything running perfectly. It's clear you and the team know what you're doing. It's worth mentioning that Allstar Systems fitted the boiler over six years ago, and we've never had a single issue with it since. That says a lot about the quality of the original installation. We really appreciate the professional service, and we'll definitely keep calling on you for our heating and plumbing needs. Thanks again.
Customer in Norfolk Posted on 18/09/2026 , work completed 18/09/2026
Highly skilled
Customer Service
Quality
Value
Allstar completely transformed and modernised my old heating system and it now works beautifully. William's knowledge and expertise is amazing and his team are excellent. Highly recommended,
Customer in Norfolk Posted on 26/11/2024 , work completed 24/11/2024
The trader replied (on 24/04/2026)
Thank you for your fantastic feedback. We truly appreciate you choosing Allstar Systems as your Which? Trusted Traders approved plumbing and heating company. We’re delighted to hear your old heating system has been fully modernised and is now working beautifully. Delivering complete heating system upgrades, including boiler installation and system improvements, is something we take great pride in. It’s great to know you found William’s knowledge and expertise valuable, and that the team delivered an excellent standard of workmanship throughout. Whether it’s central heating upgrades, boiler replacement, or ongoing boiler servicing, we always aim to provide efficient, reliable, and high-quality results. As a trusted, family-run plumbing and heating company covering Norwich and Norfolk, your recommendation means a great deal to us. We’re always here if you need expert help with your heating system, boiler, or plumbing in the future.
Friendly, communicative, professional and responsive
Customer Service
Quality
Value
Stumbled across Allstar for a boiler service quite by accident. Was pleased I did though, as they diagnosed a long standing issue with my boiler setup and worked with me to remedy it. I ultimately ended up with a replacement boiler, which was fitted in a very short timeframe. The fitting itself was completed inside of a single day, which minimised any disruption to me. I was comfortable leaving them to do the work whilst I went out. I was a little late returning, but they were happy to hang around to run through the new setup with me. All in all, they did a great job and left everything very clean and tidy.
Customer in Norfolk Posted on 26/12/2023 , work completed 17/12/2023
The trader replied (on 24/04/2026)
Thank you for taking the time to share your experience. We are really pleased you came across Allstar Systems and trusted us with your boiler servicing. It’s great to hear we were able to identify and resolve the long-standing issue with your boiler setup. We always aim to provide clear, practical solutions, whether that’s a repair or a full boiler installation when needed. We’re also glad the new boiler installation was completed quickly and with minimal disruption. Our team works hard to deliver efficient central heating and boiler upgrades while maintaining a clean and tidy workspace throughout. Thank you as well for your kind words about the team. We’re always happy to take the time to explain your new heating system and make sure everything is running as it should. We really appreciate your feedback and your trust in Allstar Systems.
New boiler and upgraded heating system
Customer Service
Quality
Value
Will has been absolutely brilliant since we contacted Allstar Systems after our boiler was condemned and we had been let down very badly by another company. Will responded immediately and work started the next day on our new boiler and heating system upgrade. We cannot thank Will and his team enough for their help and great work and highly recommend Allstar Systems.
Customer in Norfolk Posted on 22/12/2023 , work completed 22/12/2023
The trader replied (on 24/04/2026)
Thank you for your kind feedback. We’re really pleased we could step in quickly after you were let down and get things moving for you. It’s great to hear that Will and the team responded promptly and were able to start work the very next day. We understand how stressful it can be when a boiler is condemned, so we always aim to deliver fast, reliable support along with a high-quality boiler installation and heating system upgrade. We’re delighted that you’re happy with the work carried out. Your recommendation means a lot to the whole team, and we truly appreciate you choosing Allstar Systems.
Very considerate and helpful.
Customer Service
Quality
Value
Excellent work and good advice. They replaced the whole of our hot water and heating system - boiler, hot water tank, links to our solar panels, pipe work. They were always polite and careful, tidying up every day. They let us know what was next on the agenda. Finally, when, after all there work was complete, we had a flood behind our washing machine which was caused by an existing, badly capped-off pipe (which was nothing to do with them and completely unrelated to any work they had done) they arrived to fix the problem within 10 minutes of our reporting it. Marvellous service all round!
Customer in Norfolk Posted on 22/12/2023 , work completed 18/12/2023
The trader replied (on 24/04/2026)
Thank you for your fantastic feedback. We’re really pleased you’re happy with the work and advice provided throughout your project. It was a pleasure to carry out your full heating system upgrade, including the boiler installation, hot water tank, pipework, and integration with your solar panels. We always aim to deliver efficient, well-planned heating and hot water solutions that suit your home. We’re glad the team kept you informed at each stage and maintained a tidy, respectful workspace every day. Clear communication and care in your home are just as important to us as the quality of the installation itself. We also appreciate your understanding regarding the unrelated pipe issue. Even so, we were more than happy to respond quickly and get everything sorted for you. Thank you again for your kind words and support—it really means a lot to the whole team at Allstar Systems.
Made my Christmas wish come true :-) (A proper shower!)
Customer Service
Quality
Value
William and team did a great job installing a ventless tank and replacing a ridiculously useless electric shower with a proper shower with plenty of water and heat. They worked non stop to get everything done. Went above and beyond to find the right solution for my home. Thank you!
Customer in Norfolk Posted on 22/12/2023 , work completed 12/12/2023
The trader replied (on 24/04/2026)
Thank you for your great feedback. We’re really pleased you’re happy with the work William and the team carried out. It’s great to hear the new unvented hot water tank and upgraded shower have made such a difference. We always aim to provide practical, high-performance solutions that improve both water pressure and overall comfort. We’re also glad the team’s effort and commitment stood out. They always work hard to complete installations efficiently while maintaining high standards across all plumbing and heating work. Thank you again for choosing Allstar Systems—we really appreciate your support.
Allstar completed a complicated heating system upgrade superbly.
Customer Service
Quality
Value
We have a ground source heat pump supplying hot water, underfloor heating and radiators. It was fitted in 2006 and has had no upgrade since. Allstar contacted me within minutes of my inquiry and a full quote was with me within 48 hours after a site visit. It really is quite a complex system but they managed to get their heads round it swiftly. Started work on the following Monday. Friendly, tidy team who respect your house. Also, take time to fully explain what needs doing and why. I highly recommend this firm. It’s a local family run business who are real experts in any sort of heating system. Thank you Allstar!
Customer in Norfolk Posted on 14/12/2023 , work completed 11/12/2023
The trader replied (on 24/04/2026)
Thank you for your fantastic feedback. We’re really pleased you chose Allstar Systems to work on your ground source heat pump system. It’s great to hear the team responded quickly and provided a clear quote following the site visit. We understand that complex heating systems like ground source heat pumps require careful planning, so we always take the time to assess everything properly and explain the best approach. We’re also glad the installation work started promptly and that the team’s professionalism, tidiness, and respect for your home stood out. Clear communication and high standards are key parts of every heating system upgrade or repair we carry out. Your recommendation means a lot, especially as a local family-run business. Thank you again for your kind words and for trusting us with your heating system.
Replace faulty boiler
Customer Service
Quality
Value
After my boiler developed a leak Allstar attended to carry out temporary repair. I decided to have the boiler replaced and the task was carried out within one day and completed most satisfactorily. most impressed.
Customer in Norfolk Posted on 25/11/2023 , work completed 24/11/2023
The trader replied (on 24/04/2026)
Thank you for your kind feedback. We’re pleased we could attend quickly and carry out a temporary repair to get your boiler safe and working. It’s great to hear you were happy with the full boiler replacement. We always aim to complete boiler installations efficiently, often within a single day, while maintaining high standards of workmanship and reliability. We’re really glad you were impressed with the service from start to finish. Thank you for choosing Allstar Systems—we truly appreciate your support.
Highly Recommend
Customer Service
Quality
Value
I called Allstar when my boiler broke down in the recent extreme cold snap. Within 48 hours, Will and his team had installed a new heating system. They were exceptional. Knowledgeable, professional, expert fitters, super communication, follow-up service etc. Really, I can’t speak highly enough of them and wouldn’t hesitate to recommend them. I will definitely be using them for all future needs.
Customer in Norfolk Posted on 14/12/2022 , work completed 13/12/2022
The trader replied (on 24/04/2026)
Thank you for your fantastic feedback. We’re really pleased we could help during the recent cold snap and get your heating back up and running quickly. It’s great to hear that Will and the team were able to install your new heating system within 48 hours. We understand how important reliable heating is, especially in extreme weather, so we always aim to respond quickly and deliver efficient, high-quality boiler installation and heating solutions. We’re also glad our communication and follow-up service made a positive impression. Providing clear advice and ongoing support is a key part of what we do. Your recommendation means a lot to us, and we look forward to helping you with any future boiler servicing, heating, or plumbing needs.
Prompt efficient service
Customer Service
Quality
Value
Called Allstar in an emergency as the heating failed. Will arrived promptly. He was methodical in this assessment of the problem. Explained what the problem was and fixed it. He was polite courteous and professional. Thoroughly recommended.
Customer in Norfolk Posted on 05/12/2022 , work completed 02/12/2022
The trader replied (on 24/04/2026)
Thank you for your kind feedback. We’re really pleased we could respond quickly and get your heating back up and running. It’s great to hear that Will’s methodical approach and clear explanation of the issue stood out. We always aim to provide efficient, reliable boiler repairs and heating fault diagnosis, along with honest advice our customers can trust. We’re glad you found the service polite, professional, and straightforward from start to finish. Thank you for your recommendation and for choosing Allstar Systems.