15 Old School 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)

  Poor

• Roof

  (another dwelling above)

  Not rated on the certificate

• Floor

  (another dwelling below)

  Not rated on the certificate

• Windows

  Single glazed

  Very poor

• Heating

  Boiler and radiators, mains gas

  Good

• Heating controls

  Programmer, TRVs and bypass

  Average

• Hot water

  From main system, no cylinder thermostat

  Average

• Lighting

  Low energy lighting in 50% of fixed outlets

  Good

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

   50 mm internal or external wall insulation

   Typical cost £4,000–£14,000 · saves about £136 a year

   Rating after72C
2. 2

   Draught proof single-glazed windows

   Typical cost £80–£120 · saves about £5 a year

   Rating after72C
3. 3

   Low energy lighting for all fixed outlets

   Typical cost £25 · saves about £17 a year

   Rating after73C
4. 4

   Hot water cylinder thermostat

   Typical cost £200–£400 · saves about £30 a year

   Rating after74C
5. 5

   Upgrade heating controls

   Typical cost £350–£450 · saves about £23 a year

   Rating after76C
6. 6

   Replace boiler with new condensing boiler

   Typical cost £2,200–£3,000 · saves about £38 a year

   Rating after78C
7. 7

   Secondary glazing to single glazed windows

   Typical cost £1,000–£1,500 · saves about £33 a year

   Rating after80C

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