24 Hour Gas Engineer

Fast, reliable emergency gas engineers available 24/7 across London.
Gas Safe registered. Gas issues fixed fast, day or night.

• About Us

Local 24/7 Gas Engineers in London

We are experienced Gas Safe registered engineers providing 24-hour emergency gas services for homeowners and landlords across London. From urgent gas leaks to appliance faults and safety issues, we respond quickly to keep your property safe and compliant. Our qualified gas engineers are available day and night to diagnose and resolve gas-related problems efficiently, safely, and in line with current Gas Safe regulations.

24/7 Emergency Gas Services

Gas Safe Registered Engineers

All Gas Appliances Covered

Same-Day & Night Call Outs

• Our Services

Our 24 Hour Gas Engineer Services Include

Emergency Gas Engineer Call-Out

Immediate response for urgent gas issues including leaks, strong gas smells, and unsafe appliances — available 24/7.

Gas Leak Detection & Repair

Rapid detection and repair of gas leaks to protect your property and ensure safety for occupants.

Gas Appliance Faults

Diagnosis and repair of gas cookers, hobs, ovens, fires, and boilers by Gas Safe registered engineers.

Gas Safety Checks & Fault Finding

Professional gas safety inspections, fault diagnosis, and compliance checks for homes and rental properties.

Give us a quick call and we will help you right away. Give us a quick call

• Our Process

We will get everything fixed following some simple steps

1 Call Us

Get in touch by phone or online and tell us what’s happening. We’ll ask a few quick questions to understand the issue and give you immediate advice if needed.

2 Rapid Engineer Dispatch

We send the nearest available Gas Safe registered engineer to your location. In most cases, we can be with you within 40-60 minutes anywhere in London.

3 Diagnosis & Transparent Pricing

Once on site, we’ll inspect the problem, explain what’s needed and provide clear, honest pricing before any work begins. No hidden costs, no surprises.

4 Professional Repair & Testing

We fix the issue efficiently using professional tools and quality parts. Before we leave, everything is fully tested to ensure your system is safe and working perfectly.

4.9

Over 300 Reviews

• Why Us

What Makes Us Different

40 Min Arrival

We reach you within 40 minutes for emergency call-outs, getting help to you fast when time matters most.

Trusted Locally

Built on reputation and repeat customers, we’re trusted locally for reliable work and honest service.

Local Service

We’re based nearby, which means faster response times and fair pricing with no hidden costs.

Competitive Prices

Clear, honest pricing with no hidden fees, quality work at rates that make sense.

24/7 Emergency Service London

We’re available 24/7 to respond quickly, day or night. Holidays & Weekends.

Domestic & Commercial Services

We provide reliable plumbing and on-site services for homes, landlords and businesses of all sizes.

• FAQs

Frequently Asked Questions

Which areas of London do you cover?

We cover all areas of London & Greater London. Our engineers and plumbers are based across North, South, East, and West London, so we can respond quickly no matter where you’re located. We regularly serve homes and businesses in areas such as Westminster, Camden, Islington, Hackney, Greenwich, Croydon, Ealing, Hammersmith, Richmond, and beyond.

We also work in parts of Greater London and nearby areas, depending on the job type and urgency. If you’re not sure whether we cover your postcode, just give us a call, chances are, we do.

Because we have engineers based across the city, we can usually reach you the same day for emergencies. For planned work such as boiler installations, powerflushing, or heating upgrades, we’ll schedule a time that suits you. Our focus is on reliability and coverage, ensuring London homes and businesses have a dependable local team whenever they need us.

How often should I service my boiler?

Your boiler should be serviced once a year to keep it running safely and efficiently. Annual servicing helps prevent breakdowns, reduces energy use and ensures your warranty remains valid.

During a service, an engineer will inspect all major components, clean the burner and heat exchanger, check gas pressure, test safety controls and make sure there are no leaks or carbon monoxide risks. If small faults are spotted, they can be fixed before turning into expensive repairs.

Regular servicing also keeps your central heating working properly and helps extend the lifespan of your boiler. It’s especially important before winter, when your heating system is in constant use.

If you’re a landlord, you’re legally required to have an annual gas safety check on any rented property but homeowners benefit just as much from keeping their boiler maintained yearly.

Are your engineers certified?

Yes all our engineers and plumbers are fully certified, trained and Gas Safe registered. This means they’re legally qualified to work on gas appliances, boilers, and central heating systems. Every engineer carries their Gas Safe ID and you can always ask to see it before any work begins.

In addition to Gas Safe certification, our team is experienced in all areas of plumbing, heating, and electrical work. We keep up to date with the latest safety standards and manufacturer training so every job is carried out correctly and safely.

It ensures your system is repaired or installed to the highest standard and guarantees your safety. Whether you need an emergency repair, installation, or inspection, you’ll always get a qualified professional on-site.

Can you help with gas safety certificates for landlords?

Yes we carry out Gas Safety Inspections (CP12 certificates) for landlords across London. If you rent out a property with gas appliances, it’s a legal requirement to have them inspected annually by a Gas Safe registered engineer.

Our team can test all boilers, gas fires and pipework to make sure everything is safe and compliant. Once the inspection is complete, we’ll issue your Gas Safety Certificate straight away, either digitally or in print.

We also offer reminders when your next inspection is due, making it easy to stay compliant without last-minute stress. For landlords managing multiple properties, we can schedule inspections in batches to save time and avoid certificate gaps.

Do you provide free quotes?

Yes we offer free, no-obligation quotes for all plumbing, heating, and installation work. Whether you need a boiler replacement, bathroom refurbishment, powerflush, or general plumbing repair, we’ll assess the job and provide a clear breakdown of the work involved.

Our quotes are transparent and easy to understand, with no hidden charges. In most cases, we can give an estimate over the phone or by email and for larger projects we’ll arrange a site visit to give you an accurate written quote.

We believe in honesty and straightforward pricing what we quote is what you pay. There’s no pressure to commit and we’re always happy to answer questions or explain your options before any work starts.

Get a Gas Safe engineer at your door fast

Onsite Contractors and Plumbing Ltd. has been serving London for over 10 years.

We are a locally owned and operated business dedicated to customer satisfaction.

Over 70% of our work comes through referrals, reflecting the trust our customers place in us.

Whether you need plumbing, heating, or gas services, our experienced team is here to help.

Onsite Contractors and Plumbing Ltd. Registered office address: Apex House, 2nd Floor, Grand Arcade, London, England, N12 0EH, Company number : 09510946