Professional Plumbing & Heating Experts for over 30 years based in North London

Gas Safe Heating Engineers in North London


Welcome to N21 Plumbing & Heating, specialists in general plumbing, central heating, underfloor heating, air source heat pumps, gas fires and all boiler repairs and servicing.


From re-routing or replacing old pipe work or gas safety checks to installing a complex under-floor central heating system we take on all jobs, large or small.


Do you need a new gas boiler? N21 Plumbers of North London can provide help and advice on the type of boiler that you need to suit your property and your budget.


We will ensure that these checks are done professionally by Gas Safe Registered engineers, ensuring your home has had all the appropriate gas safety checks.

Landlord Certification

N21 Plumbing & Heating supply a full service for landlord gas safety checks. We are a competitively priced British Standards registered company, and Gas Safe registered.

Gas Cookers & Ovens

N21 Plumbing & Heating can provide professional installations for your gas cooker, electric cooker, gas hob and oven and gas or electric fires.

Underfloor Heating

We specialise in underfloor heating systems for domestic and commercial properties in North London.


A reliable, honest and professional service making plumbing and heating problems stress free

N21 Plumbers have over 25 years of experience working in both the commercial and domestic markets. Andrew is the founder of the business with City in Guilds (Level 3 NVQ) in plumbing and heating.  N21 Plumbing and Heating specialise in:– Boiler Changes– Heating Upgrades – Servicing & Breakdown – Landlord Safety Checks – Bathrooms & Wet Rooms– Underfloor heating

Andrew and his team are always on hand to help and advise on the best solution while working to budgets and time. All employees are gas safe registered and ensure quality safe work every time.  Why not check out our testimonials page on our website to see what some of our many satisfied customers have said?

 “A professional company providing a quality you can trust”

“The best plumber in Winchmore Hill”

N21 Plumbing and Heating always endeavour to provide the best advice with the most cost-effective solution. Areas of operation include North and North West London including but not limited to Winchmore Hill, Highgate, Finchley and St Albans.  N21 Plumbing and Heating are accredited, registered & trained specialist fitters for the following manufacturers:

Viessmann, Worcester Bosch Group, Vaillant, Ideal, Andrews Water Heaters and Baxi.We look forward to working with you soon. Andrew and the team

  • Gas servicing & gas checks
  • Boiler servicing & boiler installation
  • Filter cleaning systems fitted
  • Underfloor Heating
  • Flue gas analysing
  • New boiler upgrades
  • Thermodul skirting heating systems
  • Landlord certificates
  • Central heating installations
  • Power flushing
  • Gas & Electric cooker fitting
  • Air Source Heat Pumps
Vaillant boilers
worcester boilers
baxi boilers
ideal boilers

Why choose N21 Plumbing & Heating?

  • Gas Safe Engineers
  • Reliable, friendly and experienced tradesman
  • Emergency response and call out
  • High quality products and services
  • Free help and expert advice given
  • All work guaranteed & fully insured
  • Insurance repairs
  • Accurate time scales given
  • Honest and reliable

What our customers say about us

Don’t just take our word for it…

Viessmann Boiler
Great job and great price. Andrew came out quickly and got the boiler working in no time. We’ll definitely use N21 Plumbing and heating again!

M Rowe

Heating System

We were blown away by Andrew’s ability to beat previous quotes (he beat it by £3k!), he further saved us money by designing our bathroom and managed to complete the full heating system within a month, we appreciate him fitting us in and delivering on the completion date so we could move in. He even gave advice on the right size boiler for our house and high spec radiators. Thank you Andrew!

Lance Rollason

Boiler Service

Very good service, appointment was on time. A thorough check was carried and was given a full report. Would use again.

Alf Broadhead


Gas Safe Registered

All our plumbers/gas fitters are fully Gas Safe registered (the Gas Safe Register replaced CORGI as the gas registration body in Great Britain and Isle of Man on 1 April 2009 and Northern Ireland and Guernsey on 1 April 2010).

It is illegal for a gas fitter/engineer to carry out work when not registered on the Gas Safe Register.)

Our fitters also have City & Guilds qualifications and are highly trained to fit Energy Efficient appliances.

Boiler Breakdowns & Repairs

Offering the most comprehensive and expert Boiler service in North London.

  • Same Day Repairs

  • Repairs carried out by a fully qualified engineer

Emergency Plumbing Repairs

Offering the most responsive emergency plumbing service in North London.

  • Same Day Repairs

  • From leak fixes to replacement plumbing parts

Call Now