This page is for applicants planning when work can start and finish. It explains the usual stages from application to payment. Only a few timing rules are published, and we list those clearly. For the wider funding picture, read our upgrade fund guide.
For the broader overview, read our guide: Upgrade Fund.
Independent guide. We are not a lender or a government body. Always check current scheme rules with the official provider.
Confirmed timing rules
Two published rules affect your planning directly. Both come from official sources. Build your plans around them first.
- Home Energy Scotland offers stay valid for up to nine months, and work must not start before the written offer.
- ECO4 ends on 31 December 2026, with no successor obligation announced.
The usual stages
Most applications pass through similar stages. The time each stage takes varies by scheme, council and installer. Ask each party how long its part usually takes.
- Eligibility check and application.
- Assessment of your application and evidence.
- Home survey, where the scheme asks for one.
- Written approval or funding offer.
- Installation by an MCS-certified installer.
- Sign-off and payment of the grant or loan.
Planning around delays
Leave room in your plans for each stage. Reply to requests quickly, because gaps in evidence add time. Book your installer only after written approval. If you are in Scotland, agree an install date that falls inside the nine-month offer window.
Frequently asked questions
How long does approval take?
Timings vary by scheme and council. Ask the scheme how long its assessment usually takes.
How long is a Home Energy Scotland offer valid?
Up to nine months. Work must not start before you receive the written offer.
When does ECO4 end?
ECO4 ends on 31 December 2026.
When is the grant paid?
It depends on the scheme. Some pay the installer directly after the work. Ask the scheme how payment works.
So you can plan your installation around confirmed deadlines and avoid starting too early.
WHLS Editorial Team
Our editorial team writes independent, plain-English guides on home energy finance. We review guides when scheme rules change.
References
- Energy Saving Trust – Warm Homes: Local Grant guide (opens in a new tab)
- GOV.UK – Extending the ECO4 end date: government response (opens in a new tab)
- Home Energy Scotland – Grants and loans (opens in a new tab)
- MCS – Home Energy Scotland Grant and Loan (opens in a new tab)
- Energy Saving Trust – Welsh Government Nest scheme (opens in a new tab)
- Energy Saving Trust – Boiler Upgrade Scheme (opens in a new tab)
- MCS – Find an installer (opens in a new tab)
