BuilderPublic profile

AZ Plumbing Contractors Limited

London4.9· 112 reviews · 3 sources
Credentials & registries
1 named source
Companies House
Active incorporated business
Trust score
89out of 100
Rating4.9★
Review volume112
Source diversity3 sources
VerificationVerified

Based on rating, review volume, independent sources and verification. Evidence context — not a guarantee of workmanship.

Trust at a glance

What we can verify about AZ Plumbing Contractors Limited

2 checks

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See the full verification checklist for AZ Plumbing Contractors Limited
Credentials and associations

Named registry and membership evidence

1

Official or controlled checks carry the strongest weight here. Listed, missing, and ambiguous evidence stays visibly weaker than a verified pass.

Companies House registration

Active incorporated business

Active

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

Legal nameAz Plumbing Contractors Limited
Company number10995442
Incorporated
Registered activityHome building & construction
Official checkListed
Open Companies House entry (opens in new tab)
Planning evidence

Nearby projects

Checking nearby planning applications.

About

AZ Plumbing Contractors Limited are a local family run plumbing and heating company based in Islington, North London. All our engineers and plumbers are qualified with over 10 years experience in the industry. We can tackle all your plumbing needs from routine tasks to major repairs and brand-new installations. No job is too small or too big for us. We take pride in the services we provide, always ensuring customer satisfaction is met through a provision of high-quality standards. We have built our foundation on being a friendly and professional plumbing company who always go the extra mile for our clients. Therefore, our clients have been consistently reusing our services and recommending us to their neighbours, family and friends over the years. Please have a look at our customer reviews as they speak for themselves.

Reviews · public evidence

What the public record says

4.9out of 5
112 reviews in public evidenceCross-checked across 1 source
Which? Trusted Traders112 reviews · 4.7 avg

Highlights

"10th time I ask AZ to help and as usual, I am sincerely blown away by the service. I had a bad leak going to downstairs neighbour. Adam was very busy but made sure he found time to see me and arrived bang on time on the day. He had met me explain the situation before on the phone so could get straight to work - he was able to Find the leak in 15 mins, removing the floor only where needed and identifying the cause of the problem - while documenting the process for my insurance. All done in less than 2 hours . I am always 100pc reassured when AZ team comes to the rescue and I can't recommend them enough!"

Customer in Greater LondonWhich? Trusted Traders5.0 rating

"Very happy with the work very good quality very friendly and very good price. arrived on time. very good advice"

Customer in Greater LondonWhich? Trusted Traders5.0 rating

"It is always a pleasure to see Adam for our annual boiler service and everything went perfectly according to plan. On this occasion he also moved some drainage pipes behind the washing machine to make it fit better in its alcove and allow the oven door to open fully. He made very light work of that with a perfect and gratifying outcome."

Customer in Greater LondonWhich? Trusted Traders5.0 rating

Detailed reviews

Customer in Greater London5.0 / 5

10th time I ask AZ to help and as usual, I am sincerely blown away by the service. I had a bad leak going to downstairs neighbour. Adam was very busy but made sure he found time to see me and arrived bang on time on the day. He had met me explain the situation before on the phone so could get straight to work - he was able to Find the leak in 15 mins, removing the floor only where needed and identifying the cause of the problem - while documenting the process for my insurance. All done in less than 2 hours . I am always 100pc reassured when AZ team comes to the rescue and I can't recommend them enough!

Which? Trusted Traders
Customer in Greater London5.0 / 5

Very happy with the work very good quality very friendly and very good price. arrived on time. very good advice

Which? Trusted Traders
Customer in Greater London4.7 / 5

AZ Plumbing was brought in to resolve some major problems. Adam put it to rights. He's very knowledgeable, thorough and professional. No bodged work here! An excellent plumber/heating engineer who I wouldn't hesitate to recommend.

Which? Trusted Traders
Customer in Greater London5.0 / 5

It is always a pleasure to see Adam for our annual boiler service and everything went perfectly according to plan. On this occasion he also moved some drainage pipes behind the washing machine to make it fit better in its alcove and allow the oven door to open fully. He made very light work of that with a perfect and gratifying outcome.

Which? Trusted Traders
Customer in Greater London5.0 / 5

Adam was prompt responding to my enquiry and turning up at the appointment time. He immediately got on with the jobs: a gas safety check and servicing the combi-boiler. He was very thorough in his work, and patiently and clearly answered my queries. He also tidied up after the job was finished. Adam was polite, friendly, knowledgeable, and professional. He was clear up front about his rates, which he publishes on his website. I was impressed with his work and was happy to have him back to do a second job for me. Will use again when needed.

Which? Trusted Traders
Customer in Greater London5.0 / 5

Adam at AZ is a rare find, he is extremely clear, professional, talented, and respectful. He quickly identified our issues, provided a clear reasonable quote, arrived promptly at the stone stated and did the work in a timely and unobtrusive way, never troubling me with unnecessary questions and using his initiative to solve additional challenges encountered due to the old building. He left the space tidy and the invoice came in to budget, no hidden surprise costs. You may find lower quotes up front, but won’t find a better service and the actual cost came in very reasonable (as other plumbers often add costs later on).

Which? Trusted Traders
Customer in Greater London5.0 / 5

When Adam did our annual boiler service it appeared that two parts required replacement. On discovering that one of them was very expensive he elected to try to recondition it which he did successfully, saving us a few hundred £. As ever it was a pleasure seeing him. He also did a quick safety check on our gas hob while he was here. We look forward to his next visit in a year's time.

Which? Trusted Traders
Customer in Greater London5.0 / 5

We have used Adam on a number of times. He is always busy. A good sign. He is honest and trustworthy. I have no hesitation in recommending him

Which? Trusted Traders
Customer in Greater London5.0 / 5

Have used Adam for a few years now. Apart from the obvious of sorting issues (I had issue with boiler thermostat plus doing annual service), Adam is a good communicator, in terms of job being done and when he will arrive etc, which is not a universal trait amongst tradespeople in my experience

Which? Trusted Traders
Customer in Greater London5.0 / 5

Adam was very efficient and professional. I felt that my boiler was in safe hands. Did the service and also pointed out some other items that needed attention in the near future. Would highly recommend and I will be asking him to return to tackle the new items. Glad I found him, thanks to my Which subscription.

Which? Trusted Traders
Customer in Greater London4.7 / 5

Superb friendly trustworthy service. Fair transparent pricing. Will do the job without unwarranted costs or complications. End-to-end support. Highly recommend.

Which? Trusted Traders
Customer in Greater London5.0 / 5

Adam was excellent. He responded quickly, arrived on time, was thorough and diligent in his work and a pleasure to have in my house. I shall certainly use him again.

Which? Trusted Traders
Customer in Greater London5.0 / 5

Firstly, this was an urgent job so I appreciated that they could squeeze me in after a day job. The work was done very efficiently in my view, with a professional approach and good value for money. The plumber was friendly, gave full information about the job at hand, and tidied up after the work. An excellent job all round - I would highly recommend this plumber.

Which? Trusted Traders
Customer in Greater London5.0 / 5

We have known Adam for a long time and are delighted that his partner Kirsty has completed all her plumbing exams and is now very much a key part of the AZ plumbing and heating operation. We had a number of issues at our property, and together they diagnosed all the problems, and more importantly, fixed them to our satisfaction. As always, they were professional, experienced, tidy and courteous, and a delight to have around. They would always be our first port of call when any plumbing/heating issue arises.

Which? Trusted Traders
Customer in Greater London0.0 / 5

I'm so happy I found AZ plumbing their positive reviews did not disappoint. My toilet was leaking i had a couple of plumbers look at it and neither could tell me the issue or resolve it. Adam successfully identified the issue (a worn washer on one of the pipes) and had it fixed along with a broken flush and fitt a new toilet seat in or around one hour!!! Fantastic job and excellent friendly reliable service.

Which? Trusted Traders
Customer in Greater London5.0 / 5

Adam and Kirsty replaced a bathroom tap and fixed my Vaillant boiler. Adam is thorough and pays attention to the details. He has high standards and is conscientious. He takes his job and professional code seriously and was meticulous in diagnosing the problem, recording the evidence and suggesting a remedy. Adam even offered an alternative engineer to take on the repair job while he was on holiday. They are reliable, easy to deal with and did a great job. I would definitely use them again.

Which? Trusted Traders
Customer in Greater London5.0 / 5

The most recent of many regular, annual service visits for our boiler from Adam. While he was here he also got our dishwasher and hob back in working order. It is always a pleasure to see Adam again and we wouldn't think of asking anybody else to do our annual boiler service. What more can I say?

Which? Trusted Traders
Customer in Greater London5.0 / 5

Always my go to plumbers. Have had them do quite a bit of work now. Fitting new radiators, heating system, performing a flush and replacing pipework where necessary on a renovation job. Up front costs, honest assessments and hard workers. I've used them 4 times now and won't go anywhere else.

Which? Trusted Traders
Customer in Greater London5.0 / 5

Adam and Kirsty provided an excellent service. Adam recognised the problem within 15 minutes of arriving. Adam replaced the valve within the boiler which resolved the problem of noisy pipes. They both offered explanations and advice about plumbing in my home. Adam later replaced a faulty kitchen tap. They were considerate and tidy, clear about the charges and kept me informed of arrival times. A very professional service provided. I would highly recommend them.

Which? Trusted Traders
Customer in Greater London5.0 / 5

Adam was back soon after the annual service as the boiler timer had failed. It was replaced in a few minutes and we can once again have it turned off at night. It's always a pleasure to see Adam and we are always very happy with his attention.

Which? Trusted Traders
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Local context

Rated 4.9★ — in line with the local average for builders in London

Across 609 rated builders in London, the typical rating is 4.9★. We compare against the same businesses a homeowner would find searching for this trade locally.

Public evidence checks

Trust checks and red flags

Public evidence shown
Public review evidence4.9★ from 112 public reviewsAcross Which? Trusted TradersCompanies HouseCompanies House OfficersWhich? Trusted TradersWaste carrier (Environment Agency)
Sources

Every signal, traced to its origin

3 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 builder services it advertises - independent confirmation it's a genuine business set up to do this kind of work, not just a listing.
Public evidence checks

What's strong, and what to check yourself

Strong signals
Rating: 4.9★
Review volume: 112
Source diversity: 3 sources
Verification: Verified
1 verified credential
!Worth checking yourself
!Always confirm credentials and quotes with the trader directly before hiring.
Smart checks

Before you hire a builder

Never pay a large deposit up front — agree a staged payment schedule tied to completed milestones, and hold a small retention until snagging is done.
Get it in writing: an itemised quote with scope, materials, start and finish dates, and how any changes (variations) will be priced.
Be wary of a cash-only price or pressure to start tomorrow — both are red flags for an unaccountable job.
Ask to see a portfolio of completed work like yours, plus recent references you can contact.
Check the credentials and registrations that matter for this work — and that they are current.
Good to know

Common questions about AZ Plumbing Contractors Limited

What do customers say about AZ Plumbing Contractors Limited?

AZ Plumbing Contractors Limited has 112 public reviews, averaging 4.9 out of 5, gathered across 3 independent sources. You can read the individual reviews and where each came from in the reviews section above.

Is AZ Plumbing Contractors Limited qualified and accredited?

We hold 1 independently sourced credential for AZ Plumbing Contractors Limited, including Waste carrier (Environment Agency). Each is attributed to the body that issued it in the credentials section.

Is AZ Plumbing Contractors Limited a registered business?

Az Plumbing Contractors Limited is a registered business on Companies House (company number 10995442), incorporated 4 Oct 2017, listed as active. This confirms the legal registration of the business — not evidence of workmanship or service quality.

Public evidence last checked May 2026

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