Ask the competent person scheme that your installer belongs to, because the scheme issues the Building Regulations compliance certificate for a boiler and holds the record of it. If you do not know the scheme, ask the local authority for the address instead, since in England a registered installer must notify the work to building control. Most people searching for a "boiler installation certificate" are looking for one of three different papers: the compliance certificate, the Benchmark commissioning checklist from the manufacturer, or a gas safety record (CP12). Knowing which one you need decides who you contact.
Who issues a boiler installation certificate, and who can send you a copy?
A Building Regulations compliance certificate for a boiler is issued by the competent person scheme the installer belongs to. It does not come from the engineer personally, and it is not written by the council. GOV.UK describes the route: a registered installer self-certifies the work and notifies the local authority, and the scheme issues the certificate, with eight weeks of completion given as the scheme framework. Your first request for a copy goes to that scheme operator.
Have three details ready before you ask. You need the address where the boiler was fitted, the approximate date of the work, and the installer's company name or Gas Safe registration number. The boiler serial number helps as well. It is printed on the data plate or control panel, so reading it needs no tools and no opening of the casing.
There is no single statutory "boiler installation certificate" for an owner-occupier in England. Compliance runs through the Building Regulations notification, and the paper proof of it is the compliance certificate from the installer's competent person scheme.
Building Regulations compliance certificate or gas safety record (CP12): which one is the installation certificate?
The compliance certificate records that a boiler installation met the Building Regulations in England. A gas safety record, often called a CP12, is the annual landlord safety check and says nothing about whether the installation was notified.
| Point | Building Regulations compliance certificate | Gas safety record (CP12) |
|---|---|---|
| What it covers | The boiler installation or replacement itself, as notifiable building work in England | A check of gas appliances, pipework and flues on the day the engineer attends |
| Who issues it | The competent person scheme that the registered installer belongs to | The Gas Safe registered engineer who carried out the safety check |
| When it is produced | Once the installation is complete and the work has been notified | After each check, normally once a year |
| Who usually needs it | Homeowners proving the work complied, typically when selling | Landlords, under the Gas Safety (Installation and Use) Regulations 1998 as amended |
| Getting a copy later | Ask the scheme operator, or ask the council what was notified for the address | Ask the engineer or the firm that issued it for a duplicate record |
Both documents can exist for the same boiler without one replacing the other. A landlord with a current CP12 may still have no compliance certificate for the installation. Our guide on the gas safety certificate when you rent a room to a lodger explains where the CP12 duty comes from.
How do you ask the local authority in England what was notified for your boiler?
Local authority building control in England holds the notification made for a boiler fitted by a registered installer. Under Part 5 of the Building Regulations 2010, as they apply in England, the notice or certificate must reach the authority no more than 30 days after the work is completed. That gives you a second place to ask when the installer's scheme is unknown. GOV.UK has a tool to find the right council for an address.
Ask what was notified for your address, on what date, and whether a compliance certificate was issued. If nothing shows up, the work was either never notified or predates the current arrangements. Our guide on checking whether a boiler was registered with building control sets out the same search step by step.
What if the installer has closed down or never notified the boiler installation?
Regularisation is the route in England when a boiler installation was never notified to building control. Regulation 18 of the Building Regulations 2010, as it applies in England, allows the owner to apply in writing to the local authority for a regularisation certificate. It covers unauthorised work carried out on or after 11 November 1985. The authority can require parts of the work to be opened up so that it can be inspected and tested.
Regulation 18 also states that such a certificate is evidence of compliance, but not conclusive evidence. Nobody can tell you in advance what an authority will ask for or what it will decide. A Gas Safe registered engineer will normally need to inspect and report on the installation first. Anything involving gas, the flue or the inside of the boiler casing is work for that engineer, never a step you take yourself.
Our separate guide on a boiler not notified to building control goes through the regularisation route in more detail.
Benchmark checklist and warranty registration: the boiler installation record you may already have
The Benchmark checklist is the manufacturer's commissioning record for your boiler, and for many households it is the only installation paperwork in the house. It sits at the back of the boiler's installation manual. The installer fills it in at commissioning, you countersign it, and it stays with the manufacturer's documents. Ideal Heating describes it as the record that supports the warranty.
Warranty registration gives you a second record of the installation date. Vaillant's domestic boiler guarantee terms state that the guarantee runs from the installation date. Validation needs a purchase invoice or a completed Benchmark logbook; without one, the manufacture date on the data plate is used instead. Glow-worm's homeowner registration asks for the serial number and the installer's Gas Safe number, and its terms set a 30-day registration window after installation.
- The Benchmark checklist at the back of the boiler manual
- The installer's invoice, which shows the address and the date of the work
- The manufacturer's warranty registration, held under the boiler serial number
- The competent person scheme's record of the notified installation
- The local authority's building control record for the address
Does a buyer's solicitor ask for the boiler installation certificate when you sell?
Buyers' solicitors do ask for the boiler compliance certificate when a home in England changes hands. Local authority searches show what building work was notified for the address, so a boiler replacement with no notification is visible. A missing certificate usually turns into a question you have to answer, often late in the process. Gathering the paperwork before you market the property gives you time to use the scheme and council routes above.
Service records are a separate question from the compliance certificate, and our guide on whether you need a boiler service record or gas safety certificate to sell a house in England covers that side. If the search through old paperwork has reminded you that the boiler itself has not been looked at in years, you can arrange a boiler service or repair while you sort out the documents.
Sources
- GOV.UK – Building regulations approval: use a competent person scheme
- GOV.UK – Building work, replacements and repairs to your home
- legislation.gov.uk – The Building Regulations 2010, Part 5
- legislation.gov.uk – The Building Regulations 2010, Regulation 18 (regularisation certificates)
- HSE – Gas safety: home owners
- Ideal Heating – Benchmark
- Vaillant – Domestic boiler guarantee terms and conditions
- Glow-worm – Guarantee terms and conditions