Gas Safety Certificates (CP12) for South London Landlords

Keep your rental properties compliant and your tenants safe with a fast, fully certified Gas Safety Certificate from your local Gas Safe experts. Trusted by hundreds of South London landlords.

What is a gas safety certificate?

A Gas Safety Certificate, also known as a CP12 Certificate or a Landlord Gas Safety Record, is an important legal document that verifies the safety of all gas appliances, flues, and pipework in your rental properties.

Having an annual gas safety check and certification is a vital safety measure for protecting properties and occupants against the risk of gas leaks – which include fires and explosions, respiratory and other health problems, carbon monoxide poisoning, and damage to property.

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Our gas safety certificate service

Our team of Gas Safe registered engineers at Trusted Boilers are available to provide comprehensive gas safety checks and certificate inspections to domestic landlords and private homeowners.

  • tick Our process begins with a meticulous examination of all the gas appliances and connections in the property, ensuring that every component meets the relevant safety standards, including the Gas Safety (Installation and Use) Regulations 1998, and the BS standards for gas appliances (e.g. BS 5440, BS 6172, BS 6891, BS 7967, BS EN 15502 etc)
  • tickOur engineers are trained to identify and remedy any potential safety hazards, safeguarding your appliances, your property, and tenants.
  • tickOn completion, we will issue you with a detailed Gas Safety Certificate, which verifies that your gas systems are fully compliant with legal and industry standards.

Trusted Boilers are one of South London’s leading suppliers of gas safety services, with an unwavering commitment to safety, reliability, and professionalism.

Why you need a gas safety certificate

There are various benefits of obtaining a Gas Safety Certificate.

  • tick Firstly, your gas safety check and certificate proves that all appliances and gas systems on the property are safe, preventing potential gas leaks and keeping your tenants and their families safe
  • tickSecondly, for landlords, an annual gas safety certificate is an essential legal requirement. Landlords face fines of up to £6000 for not having a valid gas safety certificate, and each breach of the regulations can incur separate fines. In severe cases in which negligence leads to injury or death, landlords can even be imprisoned for up to 6 months. Without a valid gas safety certificate, your insurance policy may also be invalidated, leaving you financially vulnerable in the event of a gas -related incident.
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  • tickFinally, gas safety checks help to maintain the efficiency of your gas appliances, giving you early warning of maintenance issues and helping you to plan your servicing and replacement schedule. This minimises the risk of unexpected expenses should one of your tenants’ appliances break down.

Gas Safety Certificates (CP12) for South London Landlords

Keep your rental properties compliant and your tenants safe with a fast, fully certified Gas Safety Certificate from your local Gas Safe experts. Trusted by hundreds of South London landlords.

Straightforward Pricing – No Hidden Fees

We believe in fair, transparent pricing. What you see is what you pay.

Service Price
CP12 Gas Safety Certificate (includes 1 appliance) £49+ VAT
Each additional appliance + £15
Add a boiler service (optional) £55

* Subject to visits being within a 7 mile radius in London

Why You Need a CP12 – Stay Compliant, Avoid Fines

As a landlord, you're legally required to have an annual gas safety inspection for every rental property that has a gas appliance.

Under the Gas Safety (Installation and Use) Regulations 1998, a Gas Safety Certificate (also known as a CP12) must be issued by a Gas Safe registered engineer each year. This document proves that all gas appliances, pipework, and flues are safe and compliant.

You must:

Get a new certificate every 12 months

Provide your tenants with a copy

Keep a record for at least 2 years

We make it easy—book online and we’ll handle the rest.

What’s Included in Your Certificate

When you book with Trusted Boilers, you get a thorough and professional service:

  • Inspection of all gas appliances and pipework

  • Visual check of flues and ventilation

  • Gas tightness test and operational checks

  • Confirmation appliances are safe to use

  • Digital CP12 Certificate emailed to you within 24 hours
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Every inspection is carried out by a
Gas Safe registered engineer with full insurance and credentials.

How It Works – Simple, Stress-Free Booking

Book online

Choose a convenient time slot that suits your tenant.

Engineer visit

We’ll carry out the inspection and email the certificate.

Done

You’re compliant for another 12 months.

Local, Reliable Engineers Across South London

We operate exclusively in South London, so we’re always nearby.

Areas we cover include:

Lambeth

Lewisham

Southwark

Wandsworth

Bromley

Merton

…and more.
Whether you manage one flat or multiple properties, we offer same-day or next-day bookings, including evenings and weekends.

Trusted by South London Landlords


We’ve helped hundreds of landlords across South London stay compliant with fast, friendly service.

Removed & replaced two radiators

We were very pleased with the work Eric did for us. He removed and replaced two very old radiators in our central heating system. He is a very nice guy, who works hard and the new radiators look great - an excellent job well done. We will most certainly be using Eric again.
Dr MALIN

Fast, reasonable pricing, friendly, knowledgeable

Came out to fix a problem on the day we asked if they were available, and actually explained and solved the problem required, for a reasonable price. Breath of fresh air after an awful experience with a previous company who clearly couldn’t care less and quoted stupidly inflated prices. So so happy with Eric’s work, thank you.
Ally

FAQs – What Landlords Want to Know

Who needs a Gas Safety Certificate (CP12)?

Any landlord with a rental property that has gas appliances (like a boiler, oven, or fire). It’s a legal requirement renewed every year.

Can I include more than one appliance?

 Yes. Your base certificate covers one appliance. Additional appliances can be added for a small fee.

Do I need to give the certificate to my tenant?

Yes, by law you must give a copy to your tenant within 28 days—or at the start of a new tenancy.

Can I keep the certificate digitally?

Yes, digital copies are fully valid. We send your CP12 certificate by email for easy storage and sharing.

Can I get a boiler service at the same time?

Absolutely. We recommend servicing your boiler annually to ensure efficiency and avoid breakdowns. Add it to your booking in one click.

Book Your CP12 Certificate Today

  • tickFully qualified Gas Safe engineers
  • tickSame-day and next-day slots available
  • tick Instant confirmation and digital certificate
  • tickLocal service just for South London landlords

Book Now – Start by entering your postcode and choosing your appointment time.

Or call us on 020 4572 0622 for group bookings and support.

Next steps

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Whatever your gas safety needs, we have you covered. We come out to domestic properties of all types, sizes, and age, and can arrange gas safety certificates for anything from a single property to a full portfolio.

So, get in touch with the team at Trusted Boilers today to arrange your new gas safety certificate. You can click here to request an instant quote, or call 020 4572 0447 today to speak with one of our representatives in person.

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We have highly trained engineers

Accreditations

      

  

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Gas Safe
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G3 UNVENTED CERTIFIED-1

  

Provides regular annual inspections to multiple properties and does this with no fuss and tenants very happy with his style and efficiency when completing the works. Eric knows his stuff and provides sound advice on what is needed.
J Gandhl
Came out to fix a problem on the day we asked if they were available, and actually explained and solved the problem required, for a reasonable price. Breath of fresh air after an awful experience with a previous company who clearly couldn’t care less and quoted stupidly inflated prices. So so happy with Eric’s work, thank you.
Ally
Eric was brilliant very friendly and professional knows his stuff he set up our Nest Thermostat. Someone you can trust. Will use Trustedboiler again and recommend to family and friends.
G&T
Office was Extremely efficient, prompt and answered all questions. Replies and correspondence was quick and detailed. Engineer was the same! Polite, quick and professional. I don’t think you would get better service and installation anywhere else. Thank you!!
Geoff
Eric and his team responded at short notice, did all the hard work in finding the problem with our boiler, ordering the parts needed and getting the problem solved asap
Adam