Plumber

Plumbox Limited

Cambridge4.9· 42 reviews · 2 sources
Companies House
Active incorporated business
Trust score
78out of 100
Rating4.9★
Review volume42
Source diversity2 sources
VerificationListed

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About

Plumbox Limited carry out Plumbers; Boiler, central heating and gas engineers; Gas installers; Bathroom fitters; Unvented cylinder installation and maintenance; Water softener installation and maintenance; Boiler installation; Boiler repair; Boiler servicing; Gas cooker installation; Gas emergencies; Gas safety testing and inspection; Immersion Heaters; Power flushing; Radiators and central heating; Underfloor heating; Bathroom Installation; Accessible bathrooms and showers; Bathroom refurbishment; Bathroom tiling; Electric Showers; Wet rooms. We operate in Cambridge; CB1; CB2; CB3; CB4; CB24; Newmarket; Cambridgeshire

Reviews · public evidence

What customers say

4.9out of 5
42 reviews in public evidenceCross-checked across 1 source
Which? Trusted Traders42 reviews · 5.0 avg

Highlights

"I am glad to wholeheartedly recommend Mr Michael Thomas’s PLUMBOX, the local Cambridgeshire boiler & plumbing company who in October 2023 fitted an excellent new boiler and did much else besides so as to get my heating-system running like Swiss clockwork in my 1980s four-bedroomed home here in Newnham. Director Mr Thomas phoned up & came to evaluate my needs for a new boiler within hours of my enquiry, and then his expert Engineer Mr ‘Dan’ Cutts, fitted it. Dan was a pleasure to have around the house for his cheerful focus on his work that he clearly took satisfaction in doing thoroughly, and all I had to do was fuel him with an occasional cup of coffee and shortbread biscuits. If a new boiler is going to work at its best and the warranty hold good, it benefits from the system flush-through and other sundry works to boiler-piping and flue, particularly on older kit… and all these works were included within the quote…a quote that was very fair and competitive with other firms [other firms who were far less impressive in their going about a quote]; and let me emphasis that Plumbox was a FAR more attractive option than the impersonal goliath of British Gas. So, if you want old school trustworthy and cheerful pride in their work, then I warmly encourage you to invite a visit from Plumbox. Dr Nick Baylis, 22 years a homeowner in Cambridge"

Customer in CambridgeshireWhich? Trusted Traders5.0 rating

"Michael and team serviced our boiler and fixed a long standing problem with our underfloor heating, very happy with the work and will be using again!"

Customer in CambridgeshireWhich? Trusted Traders5.0 rating

"Michael Thomas and the Plumbox team have done several jobs for us in the last few years. They have always been remarkably efficient, knowledgable and informative. Michael has provided an excellent service and is always patient in explaining the complexities (or ortherwise) of the task."

Customer in CambridgeshireWhich? Trusted Traders5.0 rating

Detailed reviews

Customer in Cambridgeshire5.0 / 5

I am glad to wholeheartedly recommend Mr Michael Thomas’s PLUMBOX, the local Cambridgeshire boiler & plumbing company who in October 2023 fitted an excellent new boiler and did much else besides so as to get my heating-system running like Swiss clockwork in my 1980s four-bedroomed home here in Newnham. Director Mr Thomas phoned up & came to evaluate my needs for a new boiler within hours of my enquiry, and then his expert Engineer Mr ‘Dan’ Cutts, fitted it. Dan was a pleasure to have around the house for his cheerful focus on his work that he clearly took satisfaction in doing thoroughly, and all I had to do was fuel him with an occasional cup of coffee and shortbread biscuits. If a new boiler is going to work at its best and the warranty hold good, it benefits from the system flush-through and other sundry works to boiler-piping and flue, particularly on older kit… and all these works were included within the quote…a quote that was very fair and competitive with other firms [other firms who were far less impressive in their going about a quote]; and let me emphasis that Plumbox was a FAR more attractive option than the impersonal goliath of British Gas. So, if you want old school trustworthy and cheerful pride in their work, then I warmly encourage you to invite a visit from Plumbox. Dr Nick Baylis, 22 years a homeowner in Cambridge

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

Michael and team serviced our boiler and fixed a long standing problem with our underfloor heating, very happy with the work and will be using again!

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

Michael Thomas and the Plumbox team have done several jobs for us in the last few years. They have always been remarkably efficient, knowledgable and informative. Michael has provided an excellent service and is always patient in explaining the complexities (or ortherwise) of the task.

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

Communication was excellent and engineer punctual and knowledgeable. When I had a problem with the settings on my underfloor heating I was given a very prompt call back and the advice I needed which avoided me having to pay for a call out .

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

After 29 years it was time to replace our boiler while it was still working. Right from the start we were pleased with the attention we received from Michael and his team. He listened carefully to our requirements and came up with a solution which met what we wanted and was competitively priced. The Plumbox team worked flat out to complete the work on the 2 days we had requested. They left us with some heating overnight and were careful to clean up after each day. We are more than happy to recommend Plumbox for their professional service

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

We were having problems with our boiler which was a worry so soon before Christmas. Michael got someone round to us very quickly. He identified the problem and gave us our options, explaining them very clearly. Within a few days they replaced our boiler. The whole team are friendly, efficient and very helpful. We've used Plumbox before and definitely will again.

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

We needed to have a new central heating gas boiler installed due to the complete breakdown of our previous one. We selected Plumbox based on three key criteria: we wanted a supplier who was accredited for the boilers we were considering, preferably local as we believe in supporting local businesses and one that had good trusted reviews. Plumbox were contacted and came to see us promptly to look at our system and discuss our needs. This was done and a quote provided soon afterwards, along with prospective start date and completion times. For comparison purposes we did get other quotes but having considered them all we decided to proceed with Plumbox. We admit that the fact they could complete the installation without delay helped. An installation date and start time of 08.00 was agreed. It was good to see that the team arrived exactly on time and proceeded with the installation efficiently, cleanly and without delay. All went well, the friendly team showing great respect for our home and answering questions regarding the installation as they proceeded. By mid-afternoon the new boiler was installed and commissioned with the warm water proceeding to keep us warm again. Instructions on using the new boiler were given and a follow up visit arranged to hand over paper work relevant to the installation and to answer any questions. Overall we were completely satisfied and can wholeheartedly recommend Plumbox.

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

I had to represent the owner of the rented property, occupied by a family with young children. Plumbox were able to get to the property as soon as there was a slot available, diagnose the parts of the boiler that were not functioning and give an estimate fairly quickly. After consulting with the owner, I was able to place an order for repair that was carried out with the first available slot for an engineer. During repairs, the engineer found that another part was not allowing the boiler to function. The part was ordered on the same day and the works were carried out on the same afternoon. I am pleased that the family with young children are now able to live comfortably with a functional boiler for heating and hot water.

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

A good bunch of guys who work hard to please and do a good job. Michael has some great ideas and is very positive

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

Reliable, arrived on time, friendly and helpful. Would definitely use Plumbox again and recommend them to my friends. Quality workmanship.

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

Good, friendly service for an issue (water hammer) which had been unresolved for a long while. Service, and advice, was knowledgeable and competent , completed on-time and to budget. Already engaging for quotes for future work. Highly recommended.

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

We wanted to have our en-suite bathroom completely refurbished with a proper shower to replace the bath. We were recommended to use Plumbox by a friend. From the start they were helpful and courteous, making sensible design suggestions to achieve what we wanted. The fixed price was well within our budget and a start date was agreed. Communication was excellent at all times. The standard of cleanliness and workmanship outstanding. The job took 1 day longer than estimated due to a delay in arrival of a part - not the fault of Plumbox, who always kept us really well informed. We had a few problems at commissioning with low water pressure, but Plumbox analysed the problem, and made some changes without any fuss, and it all works perfectly. Fully recommend them in all respects.

Which? Trusted Traders
Customer in North Northamptonshire5.0 / 5

Always reliable, easy communication and great service. Plumbox help me on numerous rental properties around Cambridge and always do a great job, often fitting me in at the last minute if a tenant has an emergency. Highly recommended.

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

We have lived at this address for 55 years and met many plumbers. Plumbox are the first of a new breed. Not cheap but technically well qualified plumbers who understand modern electronics. They provide a pleasant and prompt service.

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

Quick response, excellent communication to understand the problem before the visit and very helpful approach. Michael took the time to investigate both the boiler and the heating systems and to explain possible problems. Issues solved without the cost of additional repairs and I was not charged until system had proved to be reliable. Will definitely be my my first port of call for any future problems.

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

We had our gas boiler and hot water cylinder serviced, along with some minor plumbing work done including replacing an outdoor tap. From our initial enquiry to carrying out the work on the day, Michael was very friendly, kind, efficient and promptly answered any queries. We are very happy with the work and the company.

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

Our shower room upgrade involved replacing the shower enclosure with a neater frameless model, a low-profile tray, and fitting wall panels instead of tiles to facilitate cleaning. The old wall mounted extractor fan was replaced with an in-line model in the loft. The work was done to the agreed schedule and budget, taking 3 days as planned. Michael was on site all the time working with an apprentice. We chose the panels and fittings we wanted at their suggested supplier (Beggs & Partners) located near us. Our final choices were different to the items in the quote but Plumbox did not charge more for materials. They caught our eye initially because of their Which? Trusted Trader accreditation and other positive reviews. They arrived on-time for the initial visit, gave a competitive quote, and responded quickly by email to a couple of questions. Communications were always easy by phone and email, and were responded to promptly. We were impressed by the care they took of our home (protective filmon stair carpet, frequent vacuuming of mess, no blaring builder's radio. They were polite and friendly throughout and obviously enjoy doing a quality job. They answered all our questions and were keen to explain what they were doing and why. This job involved some removal of some of the wall tiles without disturbing the rest. Michael didn't damage anything and was able to fit the panels neatly into the existing tilework. We are very happy with the result and will use them again!

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

Plumbox prioritise their customers. Michael arrived promptly and fixed our leaking pipe immediately. Totally respectful and courteous as always. Thank you!

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

Booking was professionally handled, committed timeline was met, quality of work was excellent, and installers were careful to avoid any undue mess or disruption. Would be happy to use again or to recommend.

Which? Trusted Traders
Customer in Cambridgeshire5.0 / 5

We found Plumbox via Which trusted traders and they lived up to their excellent reviews. We were impressed with their friendly and practical service throughout, from the efficient initial quotation process to the helpful return visits later to tweak the shower temperature settings. Michael and the team were very thoughtful and accommodating, including adding another small job to the schedule at short notice and earlier helping with plumbing in a new dishwasher. We were very happy with all the work done.

Which? Trusted Traders
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Local context

Rated 4.9★ — in line with the local average for plumbers in Cambridge

Across 92 rated plumbers in Cambridge, the typical rating is 4.9★. We compare against the same businesses a homeowner would find searching for this trade locally.

Companies House registration

Active incorporated business

Active

Plumbox Limited is linked to a Companies House entry. This shows the business registration, not evidence of workmanship or service quality.

Legal namePlumbox Limited
Company number11160352
Incorporated
Registered activityPlumbing & heating installation
Official checkListed
Open Companies House entry (opens in new tab)
Public evidence checks

Trust checks and red flags

Public evidence shown
Public review evidence4.9★ from 42 public reviewsAcross Which? Trusted TradersWebsiteWhich? Trusted Traders
Sources

Every signal, traced to its origin

2 named sources
Independent checks

About this business

A real, registered businessWe cross-checked Companies House: this business is officially registered for work that matches the plumber services it advertises - independent confirmation it's a genuine business set up to do this kind of work, not just a directory entry.
Public evidence checks

What's strong, and what to check yourself

Strong signals
Rating: 4.9★
Review volume: 42
Source diversity: 2 sources
!Worth checking yourself
!Verification: Listed

Public evidence last checked May 2026

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Good to know

Common questions about Plumbox Limited

What do customers say about Plumbox Limited?

Plumbox Limited has 42 public reviews, averaging 4.9 out of 5, gathered across 2 independent sources. You can read the individual reviews and where each came from in the reviews section above.

How do I know Plumbox Limited's reviews are genuine?

Plumbox Limited's 42 public reviews are gathered and cross-checked across 2 independent public sources. Reviews spread across several named sources are harder to fake than a single polished page. MyTrustedTraders brings this public evidence together with no ads and no paid placement: we show where every review came from rather than selling rankings, so you can weigh the evidence for yourself.

Is Plumbox Limited a registered business?

Plumbox Limited is a registered business on Companies House (company number 11160352), incorporated 19 Jan 2018, listed as active. This confirms the legal registration of the business — not evidence of workmanship or service quality.

Smart checks

Before you hire a plumber

Agree the call-out fee, the hourly or fixed rate, and whether parts are charged on top — in writing — before an emergency plumber starts. Out-of-hours overcharging and 'while I'm here' add-ons are common complaints.
Be wary of a plumber who, on a first visit, says your whole system or boiler must be replaced — get a second opinion and an itemised quote (parts and labour separately) before agreeing to major work.
Gas and boiler work is a separate, regulated trade — not general plumbing. Make sure anyone working on a gas appliance is specifically registered to do gas work, and ask to see that registration before they start.
Look for consistent reviews across several named sources, not one polished profile.
Check any verified credentials, and that the business details independently check out.
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