Great British Insulation Scheme Eligibility Guide (2025)
DESNZ earmarked £1 billion for GBIS through March 2026, prioritising EPC D-or-worse properties in Council Tax bands A–D (A–E in London). This guide shows insulation, HVAC, and retrofit crews how to triage leads in Toolfy, gather evidence once, and submit claims without ballooning admin time.
£1B budget
GBIS FY24-26
DESNZ, Nov 2023 allocation
300k homes
Targeted installs
Great British Insulation Scheme impact assessment
EPC ≤ D
Core eligibility
Ofgem delivery guidance 2024
⚠️ Important Disclaimer
This guide is for general informational and educational purposes only. It does not constitute professional advice of any kind (legal, financial, tax, insurance, or otherwise).
Before making business decisions: Consult with qualified professionals (solicitors, accountants, insurance brokers, etc.) who can assess your specific circumstances. Laws, regulations, and industry standards change frequently and vary by location and situation.
Toolfy and the article authors accept no liability for decisions made or actions taken based on information provided in this guide. You are solely responsible for ensuring compliance with all applicable laws and regulations.
Why GBIS demand spikes in 2025
Ofgem confirmed that low-income households plus EPC D-or-worse properties are first in line. Local authorities are scrambling to hit their allocation before an April 2026 reset, and installers that can prove PAS 2030/2035 compliance with airtight paperwork are cherry-picked.
- DESNZ modelling expects 300,000 homes to benefit; if you cover England & Wales you only need a few dozen per district to fill crews year-round.
- Funding is weighted toward loft/cavity insulation and heating controls, so your scheduling + stock planning must allow sub-48-hour turnaround.
- Councils must report completions monthly. If your job data lives in Toolfy, exports slot straight into their Ofgem template, keeping you top of the preferred-supplier list.
Eligibility matrix + routing
Wire this logic into your Toolfy lead form so office staff only see projects you can claim for.
Priority 1
- • EPC D–G, Council Tax A–D (A–E London)
- • Electrically heated or no central heating
- • On qualifying benefits or <£31k household income
Priority 2
- • EPC D owners in Council Tax E–H but fuel-poor
- • Landlords meeting minimum efficiency standards
- • ECO4-flex referrals (local-authority declared)
Source: DESNZ Great British Insulation Scheme delivery guidance (2023) + Ofgem supplier letters (2024).
Funding caps + cost planning
Use these caps inside Toolfy quotes so customers immediately see the grant contribution vs any top-up they owe.
| Measure | Max grant (inc. VAT) | Potential uplift |
|---|---|---|
| Loft insulation | £1,200 | Up to £250 for hard-to-treat |
| Cavity wall insulation | £1,800 | £500 for high scaffolding or access |
| Heating controls | £1,300 | £150 smart controls add-on |
| Solid wall (hybrid) | £7,500 | Requires ECO4-flex partnership sign-off |
Figures pulled from Ofgem GBIS delivery guidance and DESNZ consultation response (2023).
Delivery workflow inside Toolfy
Lead intake
- Typeform/Toolfy form collects EPC, tenure, benefit proof.
- Automation tags the lead “GBIS-priority-1/2”.
- Sales board auto-assigns to retrofit surveyor.
Evidence capture
- Site survey job checklist enforces photo uploads + U-value calc fields.
- Install job template requires PAS 2030 certificate numbers.
- Sign-off task ensures customer declaration + satisfaction note.
Claim submission
- Friday automation compiles invoices, photos, warranties.
- Exports share Idempotency-Key so retries never duplicate claims.
- Dashboard tracks £ per council + outstanding approvals.
Interactive GBIS readiness checklist
Track your prep work locally and reset when the next wave of homes arrives.
Stay at the front of every council’s preferred-supplier list
Toolfy organises GBIS leads, schedules multi-trade crews, and exports audit-ready claim packs without duct-taped spreadsheets.
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