“Mark came to service our Warm Air Heating Unit. He did a fantastic job including thoroughly cleaning all the parts which has made the heating more efficient throughout our home. He is highly knowledgeable and was willing to explain the steps he was doing so we could understand what was being done and why, especially around gas safety. We would highly recommend Mark.”
Public evidence profile
Unwin's Plumbing & Heating
Trust Score
53out of 100
- Rated 5.0 from 101 reviews
- Reviewed 9 months ago
How this score is worked out
Rating5.0 / 5
Review volume101
Independent sources1 independent public source
CredentialsNo credentials shown yet
How this score is made up
What customers say41.1 of 60
Independent checks7 of 30
Track record5 of 10
See the independent checks
- Licences and credentials0 of 8.3
- Ways to reach them7 of 8.3
- Reviewed on more than one site0 of 6.2
- Registered company details0 of 4.1
- Photos of their work0 of 2.1
- Industry recognition0 of 1
Missing evidence lowers the score because we can't check it. It doesn't mean it doesn't exist. Claiming a profile never changes the score. Evidence context, not a guarantee of workmanship.
Reviews · public evidence
What customers say
These reviews are published independently on the named public source below, not testimonials this business chose to show. We bring them together and link each one back to where it appeared, so you can open the source and read it yourself.
5.0out of 5
Where these reviews are published
- Checkatrade101 reviews · 5.0 avg
Highlights
“Mark serviced my Warm Air Boiler what war badly neglected after total fail with big Plumber company. James from Johnson and Starley recommended me Mark as highly experienced engineer to service their product. Mark done absolutely amazing job cleaning tons of dust out of my boiler and servicing unit, checking gas meter and EVC any spillages, honestly I’m really happy now I’ve found engineer who I can really trust. Highly recommended. Mark you saved my day as I spend 3 days without hot water as you know and you bring it back to life in few hours 👍”
“I originally wanted to replace my gas hob but Mark conducted his diagnostics and suggested that since the supply was coming through it was just a matter of cleaning the burners and giving them a good air compressor clean. Mark saved me from having to replace the entire hob appliance which would have meant cutting through quartz stone worktops. Mark is very efficient and I would highly recommend”
Detailed reviews
These are the individual reviews we hold for Unwin's Plumbing & Heating, including the highlights above. The 101 headline total is the review volume reported across public review sources.
Mark came to service our Warm Air Heating Unit. He did a fantastic job including thoroughly cleaning all the parts which has made the heating more efficient throughout our home. He is highly knowledgeable and was willing to explain the steps he was doing so we could understand what was being done and why, especially around gas safety. We would highly recommend Mark.
Mark serviced my Warm Air Boiler what war badly neglected after total fail with big Plumber company. James from Johnson and Starley recommended me Mark as highly experienced engineer to service their product. Mark done absolutely amazing job cleaning tons of dust out of my boiler and servicing unit, checking gas meter and EVC any spillages, honestly I’m really happy now I’ve found engineer who I can really trust. Highly recommended. Mark you saved my day as I spend 3 days without hot water as you know and you bring it back to life in few hours 👍
I originally wanted to replace my gas hob but Mark conducted his diagnostics and suggested that since the supply was coming through it was just a matter of cleaning the burners and giving them a good air compressor clean. Mark saved me from having to replace the entire hob appliance which would have meant cutting through quartz stone worktops. Mark is very efficient and I would highly recommend
Local context
Rated 5.0, above the local average for plumbers in Carshalton
Across 23 plumbers in Carshalton, the typical rating is 4.9 out of 5. We compare against the same businesses a homeowner would find searching for this trade locally.
From customer reviews
What customers consistently say
Recurring themes from 3 customer reviews on Checkatrade.
“He did a fantastic job including thoroughly cleaning all the parts” · Checkatrade, 16 Nov 2025
“Mark done absolutely amazing job cleaning tons of dust out of my boiler” · Checkatrade, 9 May 2025
Sources
1 named public sourceWhere this information comes from
Everything on this page is drawn from named public sources. Where a source provides a public link, you can open the original and dig deeper.
Review sources
Check dates vary by source. Where we hold a date, the check shows it.
About
In Carshalton, Greater London.
Areas served
CarshaltonGreater London
The areas they list covering on a public directory; confirm they cover your address before you book.
Your own checks
What to check before you hire
Worth checking yourself
Their public evidence comes from a single source. Look them up on another site before deciding.
No credentials are shown here and the business has not claimed this profile. Ask to see certificates and insurance directly.
Verify at the sourceCheck them yourself
Approved plumbers on the free WaterSafe register are vetted, qualified to the water regulations and insured. Check they're listed, or find a WaterSafe-approved plumber near you.
Check the WaterSafe registerAgree 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.
Want an extra legitimacy check? Run the Cowboy Checker on Unwin's Plumbing & Heating before you contact them.
Run Cowboy Checker →Good to know
Common questions about Unwin's Plumbing & Heating
Is Unwin's Plumbing & Heating a legitimate business?
Unwin's Plumbing & Heating has 101 independent public reviews, rated 5 out of 5. This is independent public evidence gathered from named public sources (no ads, no paid placement), not a guarantee of workmanship. If anything here is out of date, the business can request a correction.
What do customers say about Unwin's Plumbing & Heating?
Unwin's Plumbing & Heating has 101 public reviews, averaging 5 out of 5. You can read the individual reviews and where each came from in the reviews section above.
How do I know Unwin's Plumbing & Heating's reviews are genuine?
Unwin's Plumbing & Heating's 101 public reviews come from a named public review source, and MyTrustedTraders links every one back to where it was published, so you can open the source and read them yourself rather than trusting a single curated 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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