Selling a property in London can be stressful, with paperwork, inspections, and legal compliance taking up your time. One question many homeowners ask is whether they need a Gas Safety Certificate to sell their house. While the legal requirements differ slightly depending on the situation, having one can greatly streamline the selling process. At Citywide Plumbers, we’ve helped countless homeowners prepare their homes for sale, and we’re here to clarify why a Gas Safety Certificate could be one of your most valuable documents.
What Is a Gas Safety Certificate?
A Gas Safety Certificate, also known as a CP12, is an official document issued by a Gas Safe registered engineer after inspecting all gas appliances, pipework, flues, and installations in a property. It confirms whether the gas system meets safety regulations.
While it is a legal obligation for landlords to obtain one annually, the same isn’t required by law for private homeowners. However, when selling a property, having a recent certificate can serve as proof that your gas installations are safe and compliant—this can influence buyers and even estate agents in your favour.
Is It a Legal Requirement to Sell?
Strictly speaking, no, it is not legally required to have a Gas Safety Certificate to sell a residential property if you’re the homeowner and not letting it out. However, things are rarely that straightforward when it comes to selling.
Buyers are increasingly cautious, and solicitors acting on behalf of buyers will often request documentation relating to gas safety. Without a certificate, they may ask you to either:
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Provide one before exchange, or
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Reduce the asking price or
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Arrange for one at their expense, which may delay the sale.
Providing a valid Gas Safety Certificate upfront shows that your home is safe, compliant, and well maintained. It can avoid delays and give your buyer peace of mind.
Why Get a Gas Safety Certificate Before Selling?
At Citywide Plumbers, we always recommend obtaining a Gas Safety Certificate before listing your property for sale. Here’s why:
1. Buyer Confidence
A certificate shows potential buyers that your property has been looked after and is safe, reducing hesitation and potential objections.
2. Smooth Conveyancing Process
Solicitors are more likely to proceed quickly when all documentation, including gas safety evidence, is ready.
3. Avoid Price Negotiations
Without the certificate, buyers might ask for a discount to cover the cost of their own inspection—or worse, assume something is wrong.
4. Avoid Last-Minute Surprises
Discovering a gas fault during a buyer’s survey could result in delays, additional costs, or a failed sale.
What’s Included in the Inspection?
When you book a gas safety inspection with Citywide Plumbers, one of our certified engineers will attend your property at a convenient time and carry out the following:
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Check gas appliances (boiler, hob, oven, etc.)
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Inspect gas pipework and joints
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Check for gas leaks or carbon monoxide risk
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Confirm adequate ventilation and flue performance
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Test appliance pressure and safety controls
Once the inspection is complete, we issue your Gas Safety Certificate within 24 hours.
How Much Does It Cost?
Our Gas Safety Certificate service is competitively priced. At Citywide Plumbers, we believe in transparent, fixed pricing. Contact us directly on 02038928545 or email info@citywideplumbers.co.uk for a quick quote based on your property’s specifics.
Can Citywide Plumbers Help?
Absolutely. Our engineers are fully Gas Safe registered and experienced in preparing homes for sale across London. Whether you’re just beginning to consider selling or your buyer’s solicitor is requesting documentation, we can respond promptly and professionally. We cover a wide range of areas and offer flexible appointments to suit your schedule.
We don't just inspect—we ensure your systems are compliant, safe, and ready for transfer to the next homeowner.
Summary: Peace of Mind for All Parties
While not legally required, getting a Gas Safety Certificate before selling your house is one of the smartest steps you can take. It demonstrates due diligence, accelerates the sale, and reassures potential buyers. With Citywide Plumbers, the process is simple, efficient, and affordable. Let us help you tick one more thing off your property checklist.
Contact Citywide Plumbers