| What does it cost? |
| Here are some indicative costs of various
options that might be considered when building for energy efficiency.
For the assumed base specifications and other assumptions click here. Before using these figures in any kind of budget, please contact us and we will be pleased to help you interpret them. |
| |
|
extra over
£ / m2
|
Terraced
|
Semi
Detached
|
Flats
|
 |
| Substructure |
assumed m2: |
33
|
33
|
25
|
| |
Insitu concrete gnd floor laid on ground |
7.00 |
231 |
231 |
175 |
| |
Insitu concrete gnd floor suspended |
17.00 |
561 |
561 |
425 |
| |
Masonite system floor |
† |
|
|
|
| |
Insulation to ground floor |
8.00 |
264 |
264 |
200 |
|
| Upper floors |
assumed m2: |
30
|
30
|
23
|
| |
Beam and block floor |
7.00 |
210 |
210 |
161 |
| |
Steel frame |
8.00 |
240 |
240 |
184 |
|
| Roof (plan area) |
assumed m2: |
33
|
33
|
25
|
| |
'A' Frame structure (timber) |
11.00 |
363 |
363 |
275 |
| |
'A' Frame structure (timber) |
19.00 |
627 |
627 |
475 |
| |
Masonite roof system |
† |
|
|
|
| |
Increased insulation from 100 to 200mm |
7.00 |
231 |
231 |
175 |
|
| Roof |
assumed m2: |
50
|
50
|
37
|
| |
Welsh slates |
27.00 |
1,350 |
1,350 |
999 |
| |
Spanish slates |
0.00 |
0 |
0 |
0 |
| |
Artificial slates |
-5.00 |
-250 |
-250 |
-185 |
| |
Reclaimed slates |
9.00 |
450 |
450 |
333 |
| |
Reclaimed clay / concrete tiles |
2.00 |
100 |
100 |
74 |
| |
Cedar shingles |
3.00 |
150 |
150 |
111 |
|
| External walls |
assumed m2: |
70
|
80
|
95
|
| |
Increased thickness of cavity insulation - 200mm - only for timber frame |
7.00 |
490 |
560 |
665 |
| |
Increased thickness of blockwork - no insulation |
4.00 |
280 |
320 |
380 |
| |
Timber frame internal skin with increased thickness of cavity insulation |
9.00 |
630 |
720 |
855 |
| |
Timber frame internal skin blockwork external skin, timber boarding and 200mm cavity insulation |
14.00 |
980 |
1,120 |
1,330 |
| |
Timber frame internal skin blockwork external skin, cement & sand render and 200mm cavity insulation |
9.00 |
630 |
720 |
855 |
| |
Load bearing blockwork to take beam / block suspended floor |
4.00 |
280 |
320 |
380 |
| |
Timber frame internal and external skins and tiles hanging |
16.00 |
1,120 |
1,280 |
1,520 |
| |
Steel frame inner skin with increased thickness of cavity insulation |
14.00 |
980 |
1,120 |
1,330 |
|
| Windows and external doors |
assumed m2: |
10
|
10
|
9
|
| |
Double glazed, Argon filled, one pane low 'e', hardwood frame |
70.00 |
700 |
700 |
630 |
| |
Triple glazed ditto |
99.00 |
990 |
990 |
892 |
| |
Double glazed, Argon filled, one pane low 'e', softwood frame |
0.00 |
0 |
0 |
0 |
| |
Triple glazed ditto |
22.00 |
220 |
220 |
198 |
| |
Double glazed, Argon filled, one pane low 'e', aluminium frame |
60.00 |
600 |
600 |
540 |
| |
Triple glazed ditto |
88.00 |
880 |
880 |
792 |
| |
Double glazed, Argon filled, one pane low 'e', aluclad frame |
19.00 |
190 |
190 |
171 |
| |
Triple glazed ditto |
43.00 |
430 |
430 |
387 |
| |
Double glazed, Argon filled, one pane low 'e', hardwood frame |
-75.00 |
-750 |
-750 |
-675 |
| |
Triple glazed ditto |
-50.00 |
-500 |
-500 |
-450 |
|
| Internal walls |
assumed m2: |
25
|
25
|
20
|
| |
Timber stud partition, two layers plasterboard and insulation and skim coat |
8.00 |
200 |
200 |
160 |
| |
Steel stud in lieu of timber stud |
4.00 |
80 |
80 |
80 |
| |
Steel stud in lieu of blockwork |
4.00 |
80 |
80 |
80 |
|
| Services |
assumed m2: |
65
|
65
|
50
|
| |
Underfloor heating in timber / screeded floor |
8.00 |
520 |
520 |
400 |
| |
Grey water recycling - pressure butt system |
|
1,200 |
1,200 |
|
| |
Passive stack ventilation |
5.00 |
325 |
325 |
250 |
| |
Full balanced mechanical ventilation system |
30.00 |
1,950 |
1,950 |
1,500 |
| |
Solar powered hot water system |
|
4,500 |
4,500 |
|
| |
Individual gas heaters |
|
400 |
400 |
|
| |
Infrastructure for future systems cabling |
|
1,000 |
1,000 |
|
| |
Gas fires radiator central heating system |
14.00 |
910 |
910 |
700 |
|