13 Brenchley Close

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

  (another dwelling above)

  Not rated on the certificate

• 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

  From main system, no cylinder thermostat

  Poor

• Lighting

  Low energy lighting in 70% of fixed outlets

  Very good

The assessor's estimates at the energy prices in use when the certificate was made (2013), 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 £108 a year

   Rating after59D
2. 2

   50 mm internal or external wall insulation

   Typical cost £4,000–£14,000 · saves about £61 a year

   Rating after62D
3. 3

   Floor insulation

   Typical cost £800–£1,200 · saves about £89 a year

   Rating after66D
4. 4

   Add additional 80 mm jacket to hot water cylinder

   Typical cost £15–£30 · saves about £35 a year

   Rating after68D
5. 5

   Low energy lighting for all fixed outlets

   Typical cost £15 · saves about £11 a year

   Rating after69C
6. 6

   Hot water cylinder thermostat

   Typical cost £200–£400 · saves about £68 a year

   Rating after72C
7. 7

   Replace boiler with new condensing boiler

   Typical cost £2,200–£3,000 · saves about £113 a year

   Rating after78C

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