Yes — You Can Stack Multiple Grants
UK homeowners can combine multiple energy grant schemes to maximise their free upgrades. Each scheme is independent, with its own eligibility criteria and funding. Here's exactly what you can combine.
The Best Combination: ECO4 + Boiler Upgrade Scheme
This is the golden combo:
- Step 1: Get free insulation through ECO4 (loft, cavity wall, solid wall)
- Step 2: Apply for £7,500 BUS grant for a heat pump
- Step 3: Your now well-insulated home runs efficiently on the heat pump
Total value: £15,000-20,000+ in free/subsidised improvements.
This works because ECO4 and BUS are completely separate schemes run by different departments. There's no rule against using both.
What You CAN Stack
- ✅ ECO4 insulation + BUS heat pump grant (£7,500)
- ✅ ECO4 insulation + Smart Export Guarantee (solar earnings)
- ✅ GBIS insulation + BUS heat pump grant
- ✅ ECO4 measures + Warm Home Discount (£150 bill credit)
- ✅ Any scheme + local council grants (where available)
- ✅ ECO4 + Scottish/Welsh specific schemes (HES, Nest)
What You CAN'T Stack
- ❌ ECO4 and GBIS for the SAME measure (e.g., both paying for cavity wall insulation)
- ❌ ECO4 boiler replacement + BUS for the same property (both cover heating, pick one)
- ❌ Two applications to the same scheme for the same property
The Ideal Order
- Insulation first (ECO4 or GBIS) — reduces heat loss
- Heating upgrade second (BUS heat pump or ECO4 boiler) — efficient in insulated home
- Solar panels third (ECO4 or self-funded) — generate free electricity
- Smart Export Guarantee — earn money from excess solar
This order maximises savings because each step builds on the previous one.
Check What You Qualify For
Our eligibility checker shows all schemes you qualify for at once. Most people are surprised they can access multiple programmes.