Loft insulation in Greater London

Where we work around Greater London

Council areas covered: City of London and Westminster.

Postcodes starting BR, CR, DA, E, EC, EN, HA, IG, KT, N, NW, RM, SE, SM, SW, TN, TW, UB, W and WC are all inside our area.

Councils	City of London and Westminster
Postcode areas	BR, CR, DA, E, EC, EN, HA, IG, KT, N, NW, RM, SE, SM, SW, TN, TW, UB, W, WC
Towns listed	63

What is loft insulation?

We lay the first layer to the depth of the joists, usually 100 mm, so it fills each bay edge to edge with no gaps. The finished depth sits at 270 mm or more, the depth the Energy Saving Trust recommends. More about loft insulation.

Area under the cold water tank left clear so it cannot freeze
Cables lifted clear of the insulation where possible
Tank jacket and pipe lagging in the loft

Why book with us in Greater London

Tank and pipes protected

Every insulation job includes a tank jacket and pipe lagging, so nothing freezes in a colder loft.

Photos of the finished loft

You see the work done without climbing the ladder.

Eaves kept clear

Insulation is held back from the eaves so the loft can still ventilate.

No pressure selling

You get everything in writing and decide in your own time.

How much does loft insulation cost in Greater London?

£495 to £745Terraced house, average loft, from bare joists. Free survey and a fixed written quote before any work.

Installing insulation in a home is zero-rated for VAT until 31 March 2027 and 5% after that, under HMRC's rules for energy-saving materials (notice 708/6). The Energy Saving Trust puts a typical professionally installed loft at about £750 from bare joists, or £600 to top up from 120 mm.

Work out a guide price for your loft

Building regulations in England

In England, a loft insulated across more than half its area should reach a U-value of 0.16 W/m²K. Insulation alone is not usually notified to building control. How the rules work across the UK.

Funding in England

ECO4, the energy supplier scheme, runs until 31 December 2026 for eligible households, with no supplier scheme to follow it.
The Great British Insulation Scheme closed on 31 March 2026.
The Warm Homes Plan, announced in January 2026, funds upgrades for low-income households, including through councils under Warm Homes: Local Grant.
Check what is open for your address on GOV.UK before agreeing to any funded offer.

GOV.UK: find ways to save energy in your home

Questions about loft insulation in Greater London

Which council covers my address in Greater London?

Councils in Greater London include City of London and Westminster. Your council matters for building control questions and some funding schemes.

Can you quote for several properties in Greater London?

Yes. Landlords and agents can send a list of addresses and we will survey them in as few visits as we can.

Does loft insulation need building control approval?

On its own it usually does not, but the work still has to meet the energy standard. The rules differ across England, Wales, Scotland and Northern Ireland, so we confirm the position for your address on the quote.

Will loft insulation make my loft colder?

Yes, and that is expected. The insulation keeps the heat in the rooms below, so the loft above runs closer to the outdoor temperature. That is why pipes and the tank are lagged as part of the job.