Find an installer you can actually check
Anyone can put a logo in a website footer. Certification is a matter of public record, and so is the work behind it — that is what this page will be built from, rather than from advertising.
Nobody calls you. You choose when, and whether, to make contact.
Certification from the register
Read from the public register that issued it, not from a badge on a website.
No paid placement, ever
Nobody buys a higher position. Order comes from coverage and record.
You decide when to make contact
Look all you like without being called. An introduction happens when you ask for one.
Certification
The registers worth checking
Different measures sit under different schemes, and each one is searchable by anyone today. Knowing which applies to your job is most of the work.
MCS
Heat pumps, solar, batteries, biomass
The certification scheme for small-scale renewables. Grants like the Boiler Upgrade Scheme and most export tariffs require the installation to be certified, so this one decides whether you get the money at all.
Gas Safe Register
Anything that burns gas
Legally required for gas work. Every engineer carries an ID card listing what they are qualified for — check the card and the register, because businesses and individuals are listed separately.
TrustMark
Government-endorsed quality scheme
Covers workmanship, trading practice and customer protection, and is a condition of most publicly funded retrofit work, including ECO and the insulation schemes.
Competent person schemes
Electrical work, EV chargers
Registered electricians can self-certify work against the building regulations and notify it for you. Unregistered work has to be inspected by the council instead, at your expense.
OFTEC
Oil heating and solid fuel
The competent person scheme for oil-fired heating, which matters for the off-grid homes where the case for switching fuel is strongest.
PAS 2035 and PAS 2030
Whole-house retrofit standard
The standard publicly funded retrofit has to follow, including an assessment and a retrofit coordinator who is accountable for the plan rather than for selling a product.
The listing
What we'll show for every installer
A record rather than a profile. Everything below comes from a register or from homeowners, and none of it is written by the company itself.
- Which registers they appear on, and what each certification covers
- How long the certification has been held, and any lapses
- The postcodes they actually work in, not a national map
- The measures they fit most, by volume
- Whether they hold the certification a grant requires
- What homeowners reported after the work was finished
Before you sign
Eight questions worth asking
A good installer will answer all of these without flinching. The answers are also the fastest way to tell two similar-looking quotes apart.
- Which register are you certified with, and what is your number?
- Can I see the heat loss calculation or the survey it is based on?
- What exactly is excluded from this price?
- Who does the work — your own team or a subcontractor?
- What deposit do you need, and what does it cover?
- What is the workmanship warranty, and who honours it if you close?
- Will you handle the grant claim, and what happens if it is refused?
- Can I speak to someone you did this exact job for?
Walk away signs
- A price that only holds if you sign today
- A survey that never mentions insulation or heat loss
- A deposit that covers most of the job before anything arrives
- Certification claimed in words, with no number to check
None of these are proof of a bad job. All of them are worth a second quote.
For the trade
Are you an installer?
We would rather get your certification, coverage and specialisms right than have you correct them later. If your details are wrong, or you want to know how introductions will work, tell us.
Common questions
- Do installers pay to be listed?
- No. Listings will be built from public certification registers, so a company appears because it is certified to do the work, not because it bought a place. If an introduction is ever paid for, it will say so on the page where it happens.
- Do I have to use a certified installer?
- For gas work, yes, by law. For grant-funded work, yes: the scheme will not pay otherwise. For everything else it is a choice, but it is the choice that decides whether you have anywhere to go when something fails.
- How many quotes should I get?
- Three, with the same written scope given to each. If one comes back far cheaper, the usual explanation is that it covers less, not that the other two are overcharging.
- What if the work goes wrong?
- Your first route is the installer's own workmanship warranty. After that it is the certification body's complaints process and any consumer code the firm belongs to. Which ones apply depends on the scheme, which is why the certification is worth checking before you sign rather than after.
- Do you inspect installers yourselves?
- No, and we will say so plainly rather than implying a vetting process we do not run. What we will publish is what the public registers record and what homeowners tell us happened.
See who is certified to work on your home
Start with your postcode. We will show who covers the area and what each of them is certified to fit.