Any Qualified Provider List for UK Homeowners
Where to find the official installer and lender registers in the UK, a step-by-step vetting process and the red flags that signal a scam.
Read the guideLast checked: 30 October 2026
Qualified Providers for Sustainable Home Upgrades
How to choose and check an installer: MCS, TrustMark, consumer codes, quotes, deposits and lenders.
Overview
We help UK homeowners choose an installer they can trust. Most grants and the Warm Homes Loan Scheme depend on certified installers, so your choice of firm matters. This page explains each protection and how to check it. We do not recommend individual installers or take payment from them.
Official registers let you check any firm in minutes. Use them before you sign anything or pay a deposit.
Certification and quality schemes
MCS certifies installers and products for small-scale renewable technology. You can verify any installer on the MCS website. TrustMark is the government-endorsed quality scheme for home improvement and energy upgrades. Many grants require an MCS-certified installer, including the Boiler Upgrade Scheme and Home Energy Scotland funding.
Every MCS installer must belong to a consumer code approved by the Chartered Trading Standards Institute. The two codes are RECC and HIES. Both give you deposit protection, a workmanship warranty of at least two years and a seven-day cooling-off period. RECC bans high-pressure selling. HIES offers insurance-backed guarantees and free dispute resolution.
Quotes, deposits and warranties
Get two or three written quotes, each with an itemised breakdown. A written quote lets you compare items and spot inflated prices. Check how the firm protects your deposit under its consumer code. Note the seven-day cooling-off period, which lets you cancel without penalty.
Ask who provides each warranty and what it covers. The workmanship warranty lasts at least two years under RECC and HIES. Manufacturer warranties on products are separate, so read their terms too.
Your installer checklist
Work through these checks before you sign. Each one takes little time and uses a free official register. Keep a note of what you find for each firm. If a firm fails a check, move on to the next one.
- Installer and products confirmed on the MCS website.
- TrustMark registration checked.
- Consumer code confirmed: RECC or HIES.
- Two or three itemised written quotes compared.
- Deposit protection and the seven-day cooling-off period confirmed in writing.
- Workmanship and product warranties read and saved.
- Any lender checked on the FCA register.
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Any Qualified Provider List for UK Homeowners
Where to find the official installer and lender registers in the UK, a step-by-step vetting process and the red flags that signal a scam.
28 October 2026WHLS Editorial Team
Frequently asked questions
How do I check if my installer is MCS-certified?
Search for the firm on the MCS website. Check that the products are MCS-certified too.
What is TrustMark?
TrustMark is the government-endorsed quality scheme for home improvement and energy upgrades. You can search its register online.
What protection do I get if my installer belongs to RECC or HIES?
Deposit protection, a workmanship warranty of at least two years and a seven-day cooling-off period. RECC bans high-pressure selling, and HIES offers insurance-backed guarantees and free dispute resolution.
Can I cancel after I sign?
Yes. RECC and HIES members give you a seven-day cooling-off period.
How do I check a finance provider?
Search for the lender on the FCA register. For the Warm Homes Loan Scheme, check it is one of the ten listed lenders too.
Do you recommend specific installers?
No. We are an independent guide. We point you to the official registers so you can check firms yourself.
References
- GOV.UK – Notice of approved grant categories and values for the Boiler Upgrade Scheme (opens in a new tab)
- Energy Saving Trust – Boiler Upgrade Scheme (opens in a new tab)
- MoneySavingExpert – Warm Homes Loan Scheme news (October 2026) (opens in a new tab)
- Financial Conduct Authority – Financial Services Register (opens in a new tab)
- MCS – Find an installer (opens in a new tab)
- Energy Saving Trust – Consumer protection (opens in a new tab)
- TrustMark (opens in a new tab)
- RECC – Renewable Energy Consumer Code (opens in a new tab)
- HIES – Home Insulation and Energy Systems (opens in a new tab)