K C F I Plumbing & Heating

Welwyn Garden City5.0· 20 reviews · 2 sources
Trust score
68out of 100
Rating5.0★
Review volumeLow · 20
Source diversity2 sources
VerificationListed

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

About

Premium Bathroom & Kitchen Installation - My name is Karl and I'm a professional bathroom and kitchen installer and qualified plumber based in Hertfordshire, United Kingdom, with more than 25 years experience, and a Which? Trusted Trader. No matter what your budget or size of the project I provide a complete and courteous service from start to finish with all aspects of a project managed and completed. You can see some examples of my work in my gallery and browse just a few of the projects I've completed. If you like what you see, give me a call or use the contact form on my website to send me a message. - My services: - Bathroom Design & Installation - Kitchen Design & Installation - En-Suites - Wet Rooms - Disabled Suites - Tiling - Decorating - Supplied & Fitted or Fit Only Complete, professional service from start to finish.

Reviews · public evidence

What customers say

5.0out of 5
20 reviews in public evidenceCross-checked across 1 source
5 stars20
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3 stars0
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1 star0
Which? Trusted Traders20 reviews · 5.0 avg

Highlights

"Attention to detail was 1st class. Entirely trustworthy. Upfront about additional costs."

Stephen, HertfordshireWhich? Trusted Traders5.0 rating

"Delighted with my new bathroom, it is exactly what I wanted. The work took longer than estimated but the quality of finish is superb. Karl was excellent to deal with and I have no hesitation in recommending him. He took the vision I had of my new bathroom and made it real, perfectly."

Helen, HertfordshireWhich? Trusted Traders5.0 rating

"Karl has done a fantastic job. He worked very hard, kept me informed throughout and he is a perfectionist! Our bathroom looks great, and we will definitely call him for any future jobs."

Beth, HertfordshireWhich? Trusted Traders5.0 rating

Detailed reviews

Stephen, Hertfordshire5.0 / 5

Attention to detail was 1st class. Entirely trustworthy. Upfront about additional costs.

Which? Trusted Traders
Helen, Hertfordshire5.0 / 5

Delighted with my new bathroom, it is exactly what I wanted. The work took longer than estimated but the quality of finish is superb. Karl was excellent to deal with and I have no hesitation in recommending him. He took the vision I had of my new bathroom and made it real, perfectly.

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Beth, Hertfordshire5.0 / 5

Karl has done a fantastic job. He worked very hard, kept me informed throughout and he is a perfectionist! Our bathroom looks great, and we will definitely call him for any future jobs.

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Paul, Hertfordshire5.0 / 5

Prompt response when required, good professional service.

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Which? Trusted Traders Consumer5.0 / 5

Excellent job. Careful worker with attention to detail. Would certainly recommend him.

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Terri, Hertfordshire5.0 / 5

Karl did a fantastic job, great attention to detail, feels like he really cared about creating the bathroom we envisioned. Tidy and considerate worker. Great advice and communication with us throughout the project. Highly, highly recommend.

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Kenneth Wheeler5.0 / 5

Although mine was a small job it was not as straightforward as first seemed. Karl expertly modified the fitting resulting in a perfect result.

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Ken, Hertfordshire5.0 / 5

This was a small but not straightforward job and Karl expertly made modifications which resulted in a perfect finish.

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David, Hertfordshire5.0 / 5

A first class craftsman. His attention to detail was second to none. Excellent service from start to finish. Real pleased with work carried out & end result.

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Hough5.0 / 5

Fitted a new shower unit and toilet pan. He did a fantastic job paying great attention to detail. This is the second time we have used Karl and I wouldn't hesitate to call him for any future jobs.

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Marisa, Essex5.0 / 5

Really happy with the service. Would 100 percent recommend to a friend.

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Gill, Hertfordshire5.0 / 5

Karl did an excellent job replacing a damaged ceramic hob in our kitchen. I would thoroughly recommend him.

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Customer in Hertfordshire5.0 / 5

Karl did a fantastic job on my bathroom renovation fitting a new shower, sink, toilet, flooring and painting, needed ripping out some extra work done as well. A* finish to a very high standard, highly recommend, amazing service and very courteous as well. Very well priced as well and stuck to the timescale and always informed and updated while the work was being done as I was away. No issues at all after work either.

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Geraldine in Hertfordshire5.0 / 5

Karl has done a fantastic job refurbishing my very old and outdated kitchen which including removing a wall and installing patio doors. From start to finish I have found Karl very easy to deal with, he is professional, friendly, patient and considerate. His work is always very clean and tidy and completed to a very high standard. I have been kept up to date with progress and additional work has always been discussed and agreed with me in advance. I can thoroughly recommend Karl, my new kitchen is perfect!

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Customer in Hertfordshire5.0 / 5

Karl came to refit the house radiators this week. He was efficient, tidy and did an excellent job. He was able to accomodate our specific needs easily and was really thoughtful - going above and beyond to ensure we were ok with the installation. I would recommend him without hesitation.

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Customer in Hertfordshire5.0 / 5

From the initial survey visit, to assess the work, through to completion, Karl (and Brad) provided an excellent service. They were professional and diligent in carrying out the works and finding solutions to the inevitable issues that arise during such works. They were very clean and tidy, clearing up at the end of each day. Both Karl and Brad are extremely personable and we would highly recommend KCFI without hesitation.

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Customer in Hertfordshire5.0 / 5

We inherited a poorly constructed wet room from the previous owners of our new home. Karl inspected the job and we received a competitive quote and agreed a start date. He also suggested trade suppliers for the sanitaryware etc which in our opinion is a superior quality to the high-street as well as cost effective pricing. On dismantling the wet room, it became clear extra work was needed which we agreed to. The job understandably took longer than first estimated, however the result is a bathroom worthy of being on the front page of House & Garden! Karl by his own admission is a perfectionist, he’s also very friendly, was great with our cheeky Spaniel and a tidy worker – we have absolutely no hesitation in recommending him and his work.

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Customer in Hertfordshire5.0 / 5

KCFI Plumbing cannot recommend highly enough, attention to detail professional polite and very tidy and reliable. If your looking for a refurb on a kitchen or bathroom then Karl is your man Results are amazing Thanks Karl Carol and John

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Customer in Hertfordshire5.0 / 5

Karl recently carried out a complete renovation of our bathroom. It is refreshing to find someone who really takes a pride in their work. We found that someone in Karl. Any problems were overcome with skilful thoroughness - this is not a man who will cut corners just to get the work done. The end result is a bathroom with a showroom like finish for which we cannot thank Karl enough.

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Customer in Hertfordshire5.0 / 5

Karl has carried out an amazing refurbishment for us, and 'It looks so different but feels so right'. It involved knocking a wall down and inserting a steel, putting in a patio door, moving the consumer unit, gas meter and internal water stop cock. He has been professional throughout and attention to detail is second to none. We had a few issues to overcome on our journey, but Karl listened and everything was sorted out to achieve the desired effect. Throughout the project he has at all times tried to ensure we could continue to live in our home with the least amount of disruption and at the end of each day tidied up the area. We now have a beautiful 'space' which we both love being in. Thank you Karl

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Public evidence checks

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Public evidence shown
Public review evidence5.0★ from 20 public reviewsAcross Which? Trusted TradersCompanies HouseWhich? Trusted Traders
Sources

Every signal, traced to its origin

2 named sources
Public evidence checks

What's strong, and what to check yourself

Strong signals
Rating: 5.0★
Source diversity: 2 sources
!Worth checking yourself
!Review volume: Low · 20
!Verification: Listed

Public evidence last checked May 2026

Good to know

Common questions about K C F I Plumbing & Heating

What do customers say about K C F I Plumbing & Heating?

K C F I Plumbing & Heating has 20 public reviews, averaging 5 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 K C F I Plumbing & Heating's reviews are genuine?

K C F I Plumbing & Heating's 20 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.

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