KarbonKit
← All widgets

Methodology

How the installer finder works

Finds installers near a postcode from a directory built from public records, with a link to check each one on the MCS register.

How it works

The directory comes from Companies House, public business listings and installers’ own websites. Results are sorted by straight-line distance from the postcode. Installers can’t pay to be listed higher.

The technologies each installer offers are taken from their website where possible. Each card shows where this came from: their website, brands they mention, or their company name. The last two are marked as not confirmed.

Each week, the records that have gone longest without a check are checked again: company status at Companies House, whether the website works, and whether it still lists the same services. Dissolved companies are removed.

A website owner can list their own suggested installers instead of the directory, or above it. These are labelled as suggested by that website.

Figures used

Order

Nearest first

Straight-line distance from the postcode (postcodes.io) · Not re-checked

Updates

Weekly, oldest checks first

Companies House status and website checks · Not re-checked

Limits

  • We don’t vet or recommend the installers listed. Check certification on the MCS register (each card links to it) and get more than one quote.
  • We hold review ratings and certification details from public sources but don’t display them, because we can’t verify them.
  • A record that hasn’t been checked recently may be out of date.

Last reviewed 1 October 2026. Next review due by 1 April 2027. Try the installer finder.