• Our response Services include

    • Intruder or fire alarm activations
    • Gas leaks, floods, power problems
    • Security presence
    • Hungry pets?
    • Cover all areas of London and the South East of England
    • Security of the Banham Group and Locksmiths at hand 24/7
  • Our Keyholding Guarantee.

    • Security for your home or business
    • Competitive prices
    • Trusted keyholding service
    • Fast response time
    • No hidden charges or extra call-out
  • London & South East’s

    leading Keyholding And

    Emergency Alarm Response Company

  • Check What our Customers Have to Say


Around the Clock

Keyholding Services

CMS Keyholding provides a professional Keyholding and Alarm Response service across London and the Home Counties, giving our clients the peace of mind that their home and business properties are safe wherever they may be.

We have been a licensed Security Industry Authority (SIA) approved keyholding company since 1989, providing a wide range of security services for commercial and residential purposes.

How It Works


We offer rapid response for intruder or fire alarm activations, gas leaks, floods and power problems

Our short term property protection services keep properties safe during periods of vacancy due to holidays or renovation

Our SIA trained security personnel ensure high levels of vacant property security

We specialise in providing onsite security presence, whether it’s a routine mobile patrol or lone worker protection

We can arrange confidential, swift and secure courier services

Our services provide the advanced security of the Banham Group and locksmiths with 24/7 availability

alarm icon

The benefits of being a

CMS customer

Life’s hiccups are never planned, and while many of our mishaps can be easily fixed, others can cause dire consequences. For example leaving a heated device on could cause serious damage or, worse, a fire. Keyholding services are the best and most efficient solution to emergency situations during which you are unable to return home.


CMS Keyholding provides you with the peace of mind you need when you are away from your property. Whether it’s an alarm activation or a planned routine visit, our highly-trained team members will attend the premises and ensure that everything’s in order. We are on call and you can reach us 24 hours a day, 365 days a year.


All you need to do is arrange a site survey, decide what sort of package you would like and provide us with a key to the property, as well as extra information such as site plans.


Contact CMS Keyholding now for more information.

Contact Us


As part of the Banham Group, we pride ourselves on guaranteeing the best possible service for your needs.


This means that we offer competitive prices, fast responses and no hidden charges or extra fees on call-outs.


  • I have recently been on holiday in Spain and and because of high winds have had 3 false alarms at our home in UK. Without CMS key holding (Banham Group) who in a most efficient manner liaised with our alarm company and attended our property we would most probably have traveled home. CMS are fantastic and I particularly thank Roger who visited our home and Paul in the office

    Mr Gold
  • Superb service and great value for money. Thanks to Paul and Lukas for getting us out of trouble yesterday (not for the first time). CMS are a fantastic and well-priced insurance. I can’t recommend them too highly

    Mr Kimber
  • We are on holiday in Spain and the alarm was activated in our UK home. We were informed within a few minutes by CMS Key Holders that there was a potential problem. As we were worried that there could have been a break-in we were connected to the CMS employee who was in sight. His attitude and efficiency were fantastic and he reassured us that all was ok. He checked around our home and reset the alarm. The fee we pay CMS is the best value we have ever had and it sets our minds at rest when we are away.

    Mr. Gold, London
  • As usual, I can only praise CMS Keyholding for their professional service. The Key Guard’s name was Paul Williamson on the night that I had my key fobs stolen from my car and he was there, at my premises, before I arrived which was most reassuring and quite amazing. He was calm and efficient and I can only praise and thank you for having such professional employees. Yours faithfully.

    Mrs Tanous, Fulham
  • Good Afternoon, Can I add how impressive your surveyor Artur D. was. He is a credit to your company. Warm regards, Mr. Ballard

    Mr Ballard, Westminster
  • Can I thank you for your excellent service. The operative who attended was extremely helpful and professional. Every time I have had contact with this service I have been impressed. I would recommend your service to anyone. John Hoerner

    Mr Hoerner, Kensington
  • I am very happy with the way the 4 visits were conducted, over the last couple of weeks. The entire process from requesting the visit to execution was very efficient, simple and professional. I thought of providing positive feedback. Well done to your team and thanks.

    Mr Gandhi, Wimbledon
  • We would like to express our sincere thanks and appreciation for the excellent service provided by CMS Keyholding and their team. We regretfully had a flood in our house and the team at CMS Keyholding immediately attempted to contact us, as well as make every effort to remedy the matter. While we were away and therefore had to travel back, they were extremely proactive and helpful in monitoring the house, arranged for overnight cover and ensured keys were available to nominated parties, so that the house could be cleaned. We would have no trouble in recommending CMS Keyholding to anyone and again thank them for their help in our time of need. Regards

    Mrs Erdmann, Wandsworth
  • Thanks James, much appreciated! Just to say also thanks again for the absolutely excellent service you and your team are providing. Not only in tracking us – but managing the whole process. Both my London-based friends, who also came to our rescue, have expressed how professional your team was. If you want any endorsement from us on linked in, facebook or similar, we are very happy to provide that.

    Mrs Erdmann, Wandsworth
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For More Information

020 7627 0344

or email us at admin@cmskeyholding.com