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    What is CP12?

    To ensure you comply with current gas regulation, we can offer Cp12 throughout the North London area. The certificate will prove your appliances are safe to use.

    As a landlord, it is your responsibility to ensure that the rental house or flat complies with current gas legislation. For landlords the annual gas safety certificate is mandatory.

    This has to be done every 12 months, and your tenant can ask for proof. Also, keep your records for the future.

    It is not mandatory to check the tenant’s gas appliance, but it is still the landlord’s responsibility to make sure every gas appliance is working safely.

    After the tenant renting your house, a copy of the gas safety certificate needs to be provided to them and kept in the property.

    Only a gas-safe engineer can carry out the safety checks!

    Find out more about our services


    Never underestimate the importance of keeping your building and those who live there safely. That is why you have to make sure that all safety regulations are met, including getting a CP12 Certificate on file for any gas appliance in use at your property. The certificate proves that both you as landlord and tenants will be protected.

    The gas engineer will check the boiler and other appliance safety device operation by carrying out a series of tests. If the gas engineer is satisfied with the tests he/she will provide a gas safety certificate.

    Unbeatable price with MML Plumbing. Get your certificate today only for just £95!


    The law requires landlords to book a gas safety inspection before the rental starts. The check must be done within one year of starting your tenancy, and you can get more information from the HSE.

    The government has set laws around renting homes with gas appliances that everyone should know about. Make sure you do your checks every 12 months in your rented-out property.

    7 essential parts that need to be completed on the gas safety certificate:

    1. The engineer’s and company’s name, and Gas Safe Registration Number
    2. The landlord’s name and address (and the managing agency’s details as well)
    3. All of the gas appliances in the property need to have been listed and safety checked, including any that are disconnected.
    4. A gas tightness test has been carried out
    5. The boiler flue gas analysis have to be checked
    6. Also, the gas pressure and gas rate has to be inspected
    7. The date the visit was conducted and the certificate produced

    Book Your Landlord Gas Safety Checks Certificates

    Google Reviews

    Denise Fallon
    Denise Fallon
    WOW.... what fantastic service... Levy arrived at the time I was given. He was totally professional, in capping my gas pipe. Unfortunately, he had to remove it all, as previous engineer left it short! in order for an Induction hob to be fitted. He went above and beyond what he came to do. He also checked my boiler as he was not happy about the pressure.. would definitely use MML again.. and I can highly recommend them..
    Charlie Charlton
    Charlie Charlton
    Did not have a 'regular' plumber in north London, so took a punt and mailed a few from Google search. MML came back immediately, great communication, good price for the work (which was not a simple job) and the engineer was excellent - friendly, professional and super hard working. Three long days for what was hoped to be a two day job, no moaning when it became more complicated (due to the old system being problematic), definitely reccomend.
    Martin Lawlor
    Martin Lawlor
    This was my second time using MML Plumbing. The plumber arrived on time, assessed the problem and did his best to resolve it. It was all completed within the hour and I am very pleased with the result. A very clean and tidy job done.
    Emily Harper
    Emily Harper
    MML Plumbing were really efficient, turned when he said he would, gave an accurate quote and did the job on time with no mess. I would definitely recommend them!
    Heidi Southall
    Heidi Southall
    I called MML Plumbing to investigate a boiler fault and they were very helpful and quick to respond. The engineer, Mike, arrived earlier than expected and was friendly and professional. He thoroughly explored the problem(s) and fixed what he could. Unfortunately, it is a problem that the manufacturer will have to deal with (due to availability of parts). Mike was very honest about this and, here is the amazing part, he did not charge me today as he couldn’t fully resolve the issue! Am so impressed and would not hesitate to call this family business out again.
    WH Acting
    WH Acting
    MML Plumbing did an excellent job. The engineer was very thorough with the safety checks, boiler service and Gas Safe certification of two properties he worked at for me. Very good value for money, very good service. Admin staff were courteous and friendly over phone and email and we very prompt with sending all paperwork and copies of photographs to me. Highly recommended!
    Ronald Watt
    Ronald Watt
    Katrina Perez
    Katrina Perez
    This is the third time I have used MML plumbing. They are by far the most helpful and efficient plumbers I have used. They have installed a boiler, replaired radiators, replaired and shower and toilet for me - all work is to a high standard and every repair explained in full. HIGHLY RECOMMEND
    Laurent VT
    Laurent VT
    Fantastic service! Our boiler stopped working unexpectedly. MML Plumbing came quickly, diagnosed the problem and resolved it immediately to make sure we weren’t without radiators for too long. Very impressed with the expertise, friendliness and communication. They also gave us tips for maintenance. Highly recommended!
    Jill J
    Jill J
    Replacement of fill valve. Efficient, professional and pleasant plumber.


    We are here to serve you. Our MML Plumbing team has the knowledge and experience necessary for carrying out any gas-related work in North London, such as installation of the gas boilers or safety checks. We can carry out gas safety inspections on landlords that will make sure your landlord’s needs are met!

    We can carry out a comprehensive safety inspection on landlords that will provide peace of mind that your property is up to the gas regulation.

    Renting a property? Check the requirements before renting a property.

    Why you should choose us – Use your local gas safe registered company like MML Plumbing

    MML Plumbing offers a wide range of residential Gas Services in North London. We offer full plumbing and heating solutions, repairs, plumbing or gas boiler installations. Our expert team is available 24 hours a day 7 days a week online to help you with your estimate. In addition to our excellent service, we guarantee affordable prices on our workmanship for residential customers.

    We are proud of our expertise in the industry, as well as how many years we have been providing quality service at an affordable price to homeowners across the North London area.


    • Gas safe registered engineers & company
    • Affordable prices
    • Insured company.
    • Guaranteed workmanship
    • Gas-Plumbing and Heating Services
    • User-friendly booking system
    • 24/7 online support
    • Just to mention a few.
    • Fully qualified in gas, plumbing, and heating.

    To keep safe your tenant, property, boiler, and other gas appliances in safe working order, always call us for a check and keep your certificates as a record.

    Book your reliable gas-safe registered engineer today in North London!

    What can happen if you don’t have a valid CP-12?

    It is important to have a valid gas safety certificate when renting out.

    If you do not, the results can be serious and include: fines of up to £6,000 per breach or 6 months in prison; losing insurance coverage due to non-compliance with regulations. If there is a loss of life the guilty party could be charged with manslaughter.

    Who can issue this certificate?

    The Gas Safety Certificate is a vital document. The inspection must be carried out by a qualified gas safe registered engineer who can provide proof of qualifications. We are a gas safe registered company, so you can have peace of mind. We take care of your appliances and your safety. Our expert engineers specialize in all safety inspections and installations.

    Book your engineer for a gas safety check now!

    There are many customer or user-friendly ways to contact us, but the most popular is to fill our QUOTE MY JOB form, and we will get back to you shortly with our availability.

    24/7 online support:

    Phone: 020 8355 0840




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