CP12 Gas Certification
At Jennings, we prioritize safety above all else. Our Gas Safety Certificates, often referred to as CP12 certificates, are essential documents that certify the safety of your gas appliances.
They are not just a legal requirement; they provide peace of mind, ensuring that your home or property is free from potential gas hazards.
Gas Safety Services
EMERGENCY:
AVAILABLE 24/7
Fast-response emergency gas services for leaks, safety concerns, and appliance faults.
Available 24/7 for homes and businesses.
GAS INSTALLATION & SAFETY DEVICES
- Gas appliance installations for domestic and commercial properties
- Gas detector and carbon monoxide alarm installation
- Safe connection and commissioning of gas systems
- Fully compliant work by Gas Safe engineers
GAS METERS & REPLACEMENT
- Gas meter box replacement for worn or damaged units
- Safe removal and installation of gas components
- Improved protection, access, and appearance
- Suitable for domestic and commercial properties
GAS SAFETY CERTIFICATION
- CP12 Gas Safety Certificates for landlords
- Annual gas safety inspections and reporting
- Full compliance with UK gas safety regulations
- Clear documentation for landlords and property managers
Why CP12 Gas Certification is Crucial
- Gas Safety is Paramount: Gas appliances, if not properly maintained, can pose serious safety risks. Our CP12 certification ensures that your gas appliances are in good working order, reducing the risk of gas leaks, fires, or carbon monoxide poisoning.
- Legal Compliance: CP12 certificates are a legal requirement for landlords and property owners. Failing to obtain one can result in fines or legal action.
Our Certification Process
- Thorough Inspection: Our Gas Safe registered engineers conduct a comprehensive inspection of all gas appliances, including boilers, heaters, and ovens.
- Gas Leak Detection: We perform meticulous checks to identify any gas leaks and ensure that your property is gas-tight.
- Appliance Safety: Our engineers assess the safety of each appliance, verifying that they are correctly installed, well-ventilated, and in proper working order.
- Certification Issued: Once your property passes the inspection, we issue a CP12 Gas Safety Certificate.
- Legal Compliance: CP12 certificates are a legal requirement for landlords and property owners. Failing to obtain one can result in fines or legal action.
Why Gas Safety Matters
30%
1 in 10
30%
Up to 30% energy savings can be achieved by ensuring gas appliances run efficiently
Gas Detector Maintenance
Proper maintenance ensures your gas detector remains accurate and responsive. Regular checks, sensor calibration, and battery replacements are essential for reliable performance.
At Jennings, we go a step further by offering comprehensive maintenance services to keep your gas detectors in optimal condition. Our experienced technicians handle routine check-ups, sensor calibration, and timely battery replacements, guaranteeing your continued safety and peace of mind.
Who Needs CP12 Gas Certification?
Landlords
If you're a landlord, CP12 certification is a legal requirement. It's your responsibility to ensure the safety of your tenants.
Homeowners
Although not legally mandated for homeowners, it's strongly advised to have an annual CP12 inspection to guarantee the safety of your household.
Areas we cover
From busy city hubs to peaceful suburban neighborhoods, we’ve got London covered. Our expert property maintenance services ensure your home or business stays in top condition, no matter where you are in Greater London.
The Jennings Guarantee
Our 6-point promise to our customers

Transparent & competitive pricing
Transparent, competitive pricing with no hidden fees. Clear quotes, fair rates, and real value.

No call out fee, fixed & free quotations
We never charge a call-out fee. You only pay for our time on the job. Enjoy fixed, free quotations with no obligation.

Certified & knowledgeable engineers
Certified, experienced tradespeople, continuously assessed to ensure every job meets our highest quality standards.

Neat, tidy, honest & reliable team
We’re a neat, tidy, and trustworthy team that respects your property. From start to finish, we work cleanly and efficiently

Work guaranteed for 18 months
All our work is backed by an 18-month guarantee – one of the longest in London – giving you lasting peace of mind.

New boiler warranties up to 18 years
Get up to 18 years’ warranty on new boiler installations, covering parts and labour with trusted protection.
Need gas supplies
Visit our Pimlico shop on Lupus Street for quality plumbing, heating, and electrical supplies. Stocked with trusted brands and essentials, we’re here to support tradespeople and DIYers with expert advice and great service.