Based in Darwen, covering 20 miles around

Bathroom vanity in fluted walnut with a black vessel basin and an oval LED mirror, fitted by GrahamFinished bathroom in Rishworth with dark marble-effect wall panels and a frameless glass shower screenFreestanding roll-top bath in a new bathroom that used to be a spare bedroomFreestanding bath on a blue and white patterned tile floor with metro-tiled walls
Recent workWalnut vanity, fluted panels and an LED mirror.

Boilers, bathrooms & plumbing in Darwen

Graham Johnson fits Vaillant boilers, builds complete bathrooms and sorts out leaks and drips across Lancashire and Greater Manchester. You'll get a clear, free quote before he picks up a tool.

Vaillant ecoTEC Pro 28 combi boiler installed by Graham inside a kitchen cupboard, with new copper pipework and a magnetic filter A Vaillant ecoTEC Pro,
installed by Graham

Every boiler Graham fits is a Vaillant.

Sticking to a single manufacturer means Graham knows each model he installs inside out, from the controls to the spare parts. Being approved by Vaillant means his installations meet the manufacturer's own standards.

  • Vaillant approvedAssessed and approved by the manufacturer for the boilers he puts in.
  • Faster fixesWorking on the same make week after week means faults get spotted quickly, and the right parts are usually already on the van.
  • Extended guaranteesNew Vaillant boilers fitted by approved installers can come with longer manufacturer guarantees. Graham will tell you what applies to your model.
Ask about a new boiler

See the difference, start to finish.

Slide across to compare each room before and after Graham's refit. Choose a project on the right to swap it in.

In customers' own words.

Recommended in every Facebook review
At no point was I asked for additional money to cover x, y or z as the original quote had been so thorough.
Pauline H. on Facebook, June 2026

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

Marc P. on Facebook

I cannot fault any aspect of Graham's work.

John B. on Facebook
Read the full reviews
Graham's 20-mile service areaMap centred on Darwen with a 20-mile ring reaching Preston, Wigan, Bolton, Bury, Rochdale, Oldham, Burnley, Accrington and Clitheroe.5 miles10 miles20 milesBlackburnBoltonBuryRochdaleOldhamAccringtonChorleyPrestonBurnleyRamsbottomRawtenstallHorwichWiganLeylandHeywoodClitheroeEdgworthDarwenN5 miles

Distances are measured in a straight line from Darwen. Shaded areas show towns and copper lines show main roads. Map data from Natural Earth.

Covering 20 miles around Darwen.

From Preston and Wigan in the west to Rochdale and Oldham in the east, and up to Clitheroe in the north. Just beyond the ring? It's still worth asking.

  • Darwen
  • Blackburn
  • Bolton
  • Bury
  • Rochdale
  • Oldham
  • Accrington
  • Burnley
  • Chorley
  • Preston
  • Leyland
  • Wigan
  • Horwich
  • Ramsbottom
  • Rossendale
  • Heywood
  • Clitheroe
  • Littleborough
  • Edgworth

Plus the villages close to home, such as Hoddlesden, Belthorn, Lower Darwen, Feniscowles, Pleasington, Tockholes, Egerton and Turton.

Got a job in mind?

Call, message on WhatsApp or send the quick form. Graham will book in a visit and price the job for free.