4 Sidney Square

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, 25 mm loft insulation

  Poor

• Floor

  Solid, no insulation (assumed)

  Not rated on the certificate

• Heating

  Boiler and radiators, mains gas

  Good

• Heating controls

  Programmer and room thermostat

  Average

• Hot water

  Electric instantaneous at point of use

  Very poor

• Lighting

  Low energy lighting in 69% of fixed outlets

  Good

The assessor's estimates at the energy prices in use when the certificate was made (2011), 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–?300 · saves about £67 a year

   Rating after57D
2. 2

   Low energy lighting for all fixed outlets

   Typical cost ?10 · saves about £15 a year

   Rating after57D
3. 3

   Upgrade heating controls

   Typical cost ?350–?450 · saves about £54 a year

   Rating after59D
4. 4

   Replace boiler with new condensing boiler

   Typical cost ?1,500–?3,500 · saves about £302 a year

   Rating after69C
5. 5

   Solar water heating

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

   Rating after70C
6. 6

   Replace single glazed windows with low-E double glazed windows

   Typical cost ?2,500–?6,500 · saves about £59 a year

   Rating after72C
7. 7

   50 mm internal or external wall insulation

   Typical cost ?5,500–?14,500 · saves about £211 a year

   Rating after79C
8. 8

   Solar photovoltaic panels, 2.5 kWp

   Typical cost ?11,000–?20,000 · saves about £207 a year

   Rating after86B

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