Graham Johnson, plumbing and heating engineer in Darwen.

Plumbing, heating and bathrooms from one engineer, who quotes the job, does the job and hands it over himself.

One engineer, four trades.

Graham trades as G.S Johnson from Darwen. He's Gas Safe registered (225475), a Vaillant Approved Installer, and works up to 20 miles around, from Preston to Oldham.

In his own words, being multi-skilled within the plumbing and heating industry is a blessing he truly appreciates. From a boiler installed neatly to a bathroom finished to a high standard, he does it all.

GrahamPlumbing and heating engineer, Gas Safe 225475
MirandaGraham's apprentice, on bigger jobs
WarrenElectrician, for bathroom electrics
Graham's van, signwritten G.S Johnson, Plumbing, Heating, Bathrooms, with four service badges and Gas Safe number 225475
Look out for the van: the four badges on the side are the four things Graham does.

How a job runs.

Four stages, each in the words of a customer who's been through it.

  1. 1

    A detailed quote first

    Graham looks at the job and sets out what's needed before anything starts.

    Graham quoted in great detail what was required…Pauline H.
  2. 2

    An agreed timescale

    You know roughly how long the work will take before it begins.

    He also gave an accurate timescale for the work…Pauline H.
  3. 3

    Kept up to date

    On longer jobs Graham tells you what's happening next, and explains the work as it goes.

    …kept me updated of what he was planning to do each week.Pauline H.
  4. 4

    A proper handover

    When the job is finished, Graham walks you through it.

    From quotation to giving a comprehensive handover when the job was completed.John B.

Reviews from Graham's Facebook page.

All five reviews, word for word. Every one of them recommends Graham.

See them on Facebook

Very happy to recommend Graham Johnson, plumbing and heating services.

My bathroom was a mess, not practical for myself. Graham quoted in great detail what was required to move a bathroom from its current location to another room in the house.

He also gave an accurate timescale for the work, and kept me updated of what he was planning to do each week. Miranda assisted at times, as did Warren, who completed the electrical work. The tiling work is superb, friends and family adore my bathroom too.

Graham was respectful of my property and my belongings. I paid for the work in instalments, to help me with budgeting, but all equipment (suite, tiles, plaster etc) came directly to my property and was stored on site until it was ready for installation.

At no point was I asked for additional money to cover x, y or z as the original quote had been so thorough.

I would be very happy to recommend Graham for plumbing and heating services.

Pauline H.Recommends on Facebook, 17 June 2026

Graham turned our tired and very dated en-suite into a beautiful shower room.

His work ethic, professionalism and attention to detail is 1st class.

Would highly recommend

Marc P.Recommends on Facebook, 24 October 2020

I met Graham through a work colleague.

Graham came and gave me a very competitive quote for a virtually new central heating system.

From quotation to giving a comprehensive handover when the job was completed.

I cannot fault any aspect of Graham's work.

He always worked to the highest standards and taking time at every point to explain the work as it progressed.

I would have absolutely no hesitation whatsoever to recommend Graham to others.

I have now booked him to do my bathroom later in the year.

John B.Recommends on Facebook, 10 February 2020

I would recommend graham for your heating and plumbing maintenance very friendly and helpful and also very reasonable in price I would rate him 100%

Barbara L.Recommends on Facebook, 22 May 2020

Diamond service from Diamond Guy!

very much recommended with many thanks

Christian S.Recommends on Facebook, 19 December 2019

Tell Graham about your job.

Ring, send a WhatsApp or fill in the short form. He'll get back to you to arrange a visit and a free, detailed quote.