21 Gardner Road

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, 100 mm loft insulation

  Average

• 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, no room thermostat

  Very poor

• Hot water

  From main system

  Good

• Lighting

  Low energy lighting in 33% of fixed outlets

  Average

The assessor's estimates at the energy prices in use when the certificate was made (2016), 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 £146 a year

   Rating after68D
2. 2

   Floor insulation (suspended floor)

   Typical cost £800–£1,200 · saves about £23 a year

   Rating after69C
3. 3

   Draught proof single-glazed windows

   Typical cost £80–£120 · saves about £9 a year

   Rating after69C
4. 4

   Low energy lighting for all fixed outlets

   Typical cost £30 · saves about £31 a year

   Rating after71C
5. 5

   Upgrade heating controls

   Typical cost £350–£450 · saves about £74 a year

   Rating after74C
6. 6

   Solar water heating

   Typical cost £4,000–£6,000 · saves about £36 a year

   Rating after75C
7. 7

   Replace single glazed windows with low-E double glazed windows

   Typical cost £3,300–£6,500 · saves about £28 a year

   Rating after76C
8. 8

   High performance external doors

   Typical cost £2,000 · saves about £23 a year

   Rating after77C
9. 9

   Solar photovoltaic panels, 2.5 kWp

   Typical cost £5,000–£8,000 · saves about £277 a year

   Rating after88B

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