21 Greenway

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, 300 mm loft insulation

  Very good

• Floor

  Suspended, no insulation (assumed)

  Not rated on the certificate

• Windows

  Partial double glazing

  Poor

• Heating

  Boiler and radiators, mains gas

  Good

• Heating controls

  Programmer, room thermostat and TRVs

  Good

• Hot water

  From main system

  Good

• Lighting

  Low energy lighting in 44% of fixed outlets

  Average

• 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

   50 mm internal or external wall insulation

   Typical cost £4,000–£14,000 · saves about £158 a year

   Rating after69C
2. 2

   Floor insulation (suspended floor)

   Typical cost £800–£1,200 · saves about £41 a year

   Rating after71C
3. 3

   Draught proof single-glazed windows

   Typical cost £80–£120 · saves about £7 a year

   Rating after72C
4. 4

   Low energy lighting for all fixed outlets

   Typical cost £25 · saves about £27 a year

   Rating after73C
5. 5

   Replace boiler with new condensing boiler

   Typical cost £2,200–£3,000 · saves about £43 a year

   Rating after75C
6. 6

   Solar water heating

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

   Rating after76C
7. 7

   Replace single glazed windows with low-E double glazed windows

   Typical cost £3,300–£6,500 · saves about £32 a year

   Rating after77C
8. 8

   Solar photovoltaic panels, 2.5 kWp

   Typical cost £5,000–£8,000 · saves about £295 a year

   Rating after88B

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