25 Glenthorne 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, 250 mm loft insulation

  Good

• Floor

  Suspended, no insulation (assumed)

  Not rated on the certificate

• Heating

  Room heaters, mains gas

  Average

• Heating controls

  Appliance thermostats

  Good

• Hot water

  Gas multipoint

  Average

• Lighting

  Low energy lighting in 56% of fixed outlets

  Good

• Second heating

  Portable electric heaters (assumed)

  Not rated on the certificate

The assessor's estimates at the energy prices in use when the certificate was made (2014), 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 £262 a year

   Rating after61D
2. 2

   Floor insulation

   Typical cost £800–£1,200 · saves about £50 a year

   Rating after63D
3. 3

   Draught proof single-glazed windows

   Typical cost £80–£120 · saves about £42 a year

   Rating after64D
4. 4

   Low energy lighting for all fixed outlets

   Typical cost £20 · saves about £20 a year

   Rating after65D
5. 5

   Change room heaters to condensing boiler

   Typical cost £3,000–£7,000 · saves about £193 a year

   Rating after72C
6. 6

   Solar water heating

   Typical cost £4,000–£6,000 · saves about £31 a year

   Rating after74C
7. 7

   Replace single glazed windows with low-E double glazed windows

   Typical cost £3,300–£6,500 · saves about £71 a year

   Rating after76C
8. 8

   Solar photovoltaic panels, 2.5 kWp

   Typical cost £9,000–£14,000 · saves about £258 a year

   Rating after85B

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