Home Plumbing
Installation London
Complete first and second fix plumbing for renovations, new builds and whole-home projects across London — from concealed first-fix pipework to the final fit-off, delivered alongside your heating system where needed.
Whole-home plumbing —
done to a standard, not a price
Some plumbing you can afford to have done cheaply. The pipework hidden inside the walls of a home you've invested heavily in is not it. This is the work you bring DGN GAS in for — complete first and second fix plumbing for renovations, extensions, new builds and whole-home refurbishments, installed by one accountable team for homeowners, builders, architects and designers who want it done once and done right.
First fix to
final finish
First Fix Plumbing
The concealed work — hot and cold supply, waste, soil and drainage, set out and pressure-tested before the walls close. Done right the first time, because it's buried for good.
Second Fix & Fit-Off
The visible finish — taps, showers, baths, basins, WCs and appliances connected, sealed and commissioned. The details your client sees and touches every day.
Bathrooms & Wet Rooms
Full plumbing for high-end bathrooms and wet rooms, worked to the designer's layout — concealed cisterns, thermostatic showers, freestanding baths and precise set-out.
Kitchens & Utility
Sinks, dishwashers, washing machines, filtered and boiling-water taps and laundry runs — coordinated cleanly with your kitchen fitter.
Whole-Home Re-Pipes
Replacing tired, undersized or old lead pipework across an entire property during renovation — restoring flow, pressure and peace of mind.
New Builds & Extensions
Complete first and second fix plumbing for new builds, extensions and loft conversions — planned from the drawings and delivered to programme.
For homeowners, and
the trades who build for them
Renovating Your Own Home
If you're building or refurbishing the home you'll live in, you want plumbing you never have to think about again. We advise honestly, protect your home while we work, and leave a finish worthy of the rest of the project.
Builders, Architects & Designers
We're the plumbing partner you put on a premium project. We read drawings, hold to programme, coordinate with the other trades and represent your job well on site — no dramas, no callbacks, no awkward conversations with your client.
From drawings to
a finished home
Survey & Design
We understand the project, the drawings and the finish expected — then plan pipe routes, sizing and set-out around how the home will actually be used.
Coordination & Programme
Scope and quote agreed, then coordinated with your builder, architect and other trades so the plumbing lands at exactly the right stage.
First Fix
Supply, waste and drainage installed and pressure-tested before the walls close up — because once it's plastered, there's no going back.
Second Fix & Commissioning
Sanitaryware, taps, showers and appliances fitted, connected and commissioned — every joint tested under pressure.
Handover
A clean site, a system that works flawlessly, and one firm accountable for all of it long after we've left.
Get in Touch
Free, no-obligation quote
Common questions about
plumbing installation
Do you take on full renovation and new build plumbing?
Do you work for builders and architects, or only homeowners?
Do you cover both first fix and second fix?
Will you coordinate with our other trades?
Are you the cheapest plumber in London?
What areas do you cover?
"Have used DGN GAS a few times now. They installed a boiler at my parent's house and I had a boiler and underfloor heating installed at my house. Very happy with everything."
"I have had a heating system including a Vaillant boiler, Megaflo and underfloor heating installed by DGN GAS. A very professional service and am extremely happy."
Planning a renovation or new build?
Talk to us early — the best plumbing is designed in, not bolted on. London-wide coverage.
Get a Quote 07813 474638