20 Constable Road

What the assessor found

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

• Walls

  Cavity wall, as built, no insulation (assumed)

  Poor

• Roof

  Pitched, 100 mm loft insulation

  Average

• Floor

  Solid, no insulation (assumed)

  Not rated on the certificate

• Windows

  Fully double glazed

  Average

• Heating

  Boiler and radiators, mains gas

  Good

• Heating controls

  Programmer and room thermostat

  Average

• Hot water

  From main system

  Good

• Lighting

  Low energy lighting in 18% of fixed outlets

  Poor

• 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 (2015), 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

   Cavity wall insulation

   Typical cost £500–£1,500 · saves about £429 a year

   Rating after53E
2. 2

   Floor insulation (solid floor)

   Typical cost £4,000–£6,000 · saves about £118 a year

   Rating after57D
3. 3

   Low energy lighting for all fixed outlets

   Typical cost £45 · saves about £43 a year

   Rating after58D
4. 4

   Upgrade heating controls

   Typical cost £350–£450 · saves about £62 a year

   Rating after60D
5. 5

   Replace boiler with new condensing boiler

   Typical cost £2,200–£3,000 · saves about £103 a year

   Rating after63D
6. 6

   Solar water heating

   Typical cost £4,000–£6,000 · saves about £44 a year

   Rating after65D
7. 7

   Replacement glazing units

   Typical cost £1,000–£1,400 · saves about £57 a year

   Rating after66D
8. 8

   Solar photovoltaic panels, 2.5 kWp

   Typical cost £5,000–£8,000 · saves about £267 a year

   Rating after75C

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