How much does loft insulation cost in the UK?
A loft insulation costs £400 to £2,500 in the UK, typically around £900 for the house. Prices reviewed June 2026.
Loft insulation is one of the cheapest ways to cut heating bills. The price depends on whether you are topping up an existing layer or insulating from scratch, and whether the loft is boarded.
Price your loft insulation
Adjust for your job and area to get a range. Nothing is sent anywhere.
Loft insulation cost breakdown
What a loft insulation typically costs, by option:
| Type of job | Typical UK cost |
|---|---|
| Top up an existing layer | £300 to £700 |
| Full 270mm, open loft | £700 to £1,400 |
| Boarded or room-in-roof | £1,500 to £3,000 |
| + Insulated loft hatch and ladder | add £150 to £400 |
What's included in the price?
A typical loft insulation price includes:
- Survey and materials
- Insulation laid to the current 270mm depth
- Draught-proofing the loft hatch
- Clearing the working area
What changes the price?
The things that move a loft insulation price most:
Loft size and ease of access
Topping up an existing layer or a full new one
Whether the loft is boarded or used for storage
Hard-to-treat lofts such as room-in-roof or sloping ceilings
Does where you live change the cost?
Fairly consistent nationally. Grants such as ECO4 or the Great British Insulation Scheme can cover the cost for eligible households, which changes what you pay more than location does.
Common questions
A straightforward 270mm roll-out in an open loft is typically £700 to £1,400. Topping up an existing layer is less, while a boarded or room-in-roof loft costs more.
Yes. Schemes such as ECO4 and the Great British Insulation Scheme can cover part or all of the cost for eligible households. Check your eligibility before paying, as it can make the work free.
These are independent guide prices based on typical UK jobs in 2026. Your actual cost depends on your property, spec, access and where you live. Always get at least three written quotes before committing.