A Guide by Citywide Plumbers
If you're a landlord, letting agent, or property owner, understanding the validity of a Gas Safety Certificate (CP12) is essential. At Citywide Plumbers, we ensure our clients stay safe and compliant year-round. But how long does the certificate last once issued?
The simple answer: 12 months. Let’s take a closer look at what that means, why it matters, and how Citywide Plumbers can help.
Legal Validity Period: 12 Months
In accordance with the Gas Safety (Installation and Use) Regulations 1998, a Gas Safety Certificate is valid for exactly one year from the date of inspection.
After 12 months, the certificate expires, and a new inspection must be carried out by a Gas Safe registered engineer to issue an updated certificate.
Citywide Plumbers makes this easy with fast, certified checks across all London boroughs.
Who Needs to Renew It?
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Landlords: Required by law to renew every 12 months for each rental property.
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Letting Agents: Responsible on behalf of landlords to ensure renewal.
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Homeowners: Not legally required, but advisable for safety and insurance purposes.
Citywide Plumbers offers tailored services for all property types and reminders so you never miss a renewal deadline.
What Happens if It Expires?
Letting a property without a valid Gas Safety Certificate is illegal and can lead to:
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Fines of up to £6,000
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Prison sentences in extreme cases
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Invalidation of landlord insurance
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Risk to tenant health and safety
To avoid these consequences, Citywide Plumbers recommends scheduling your next inspection 10–11 months after the last one, allowing time to renew before expiry.
Can You Renew Early?
Yes. The regulations allow landlords to carry out a new inspection up to two months before the current certificate expires, and still retain the original renewal date. This provides flexibility and avoids last-minute stress.
For example, if your certificate expires on 1st October, you may renew as early as 1st August and still keep the October renewal date.
Citywide Plumbers can help you plan this effectively.
Keep Records for 2 Years
Even after expiry, you must keep a record of each certificate for at least 2 years. These may be requested by:
We provide digital and printed copies for your convenience.
Why Choose Citywide Plumbers?
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Gas Safe registered engineers
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12-month certification with full legal compliance
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Email reminders before your certificate expires
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Fast service across all of London
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Transparent pricing
Whether you're a first-time landlord or managing multiple properties, we’re your trusted partner for ongoing gas safety.
Contact Citywide Plumbers
To book or renew your Gas Safety Certificate:
02038928545
info@citywideplumbers.co.uk