48 Cornwall Street

What the assessor found

Each part of the home, with the certificate's own energy efficiency rating.

• Walls

  Solid brick, as built, no insulation (assumed)

  Very poor

• Roof

  Pitched, 50 mm loft insulation

  Poor

• Floor

  Solid, no insulation (assumed)

  Not rated on the certificate

• Windows

  Single glazed

  Very poor

• Heating

  Boiler and radiators, mains gas

  Good

• Heating controls

  Programmer, TRVs and bypass

  Average

• Hot water

  From main system

  Good

• Lighting

  Low energy lighting in all fixed outlets

  Very good

• Second heating

  Room heaters, mains gas

  Not rated on the certificate

The assessor's estimates at the energy prices in use when the certificate was made (2018), for a typical household. Today's bills will differ.

Improvements the certificate recommends

In the certificate's order. Each rating assumes the steps before it are done.

1. 1

   Increase loft insulation to 270 mm

   Typical cost £100–£350 · saves about £54 a year

   Rating after63D
2. 2

   50 mm internal or external wall insulation

   Typical cost £4,000–£14,000 · saves about £163 a year

   Rating after70C
3. 3

   Floor insulation (solid floor)

   Typical cost £4,000–£6,000 · saves about £25 a year

   Rating after71C
4. 4

   Upgrade heating controls

   Typical cost £350–£450 · saves about £26 a year

   Rating after72C
5. 5

   Replace boiler with new condensing boiler

   Typical cost £2,200–£3,000 · saves about £50 a year

   Rating after74C
6. 6

   Solar water heating

   Typical cost £4,000–£6,000 · saves about £33 a year

   Rating after75C
7. 7

   Replace single glazed windows with low-E double glazed windows

   Typical cost £3,300–£6,500 · saves about £90 a year

   Rating after79C
8. 8

   Solar photovoltaic panels, 2.5 kWp

   Typical cost £5,000–£8,000 · saves about £282 a year

   Rating after89B

Costs and savings are the certificate's own, as estimated when it was made.