Carbon Commentary » housing http://www.carboncommentary.com A critical appraisal of issues in the move to a low-carbon economy Mon, 11 Aug 2008 19:16:27 +0000 http://wordpress.org/?v=2.3.3 en Zero-carbon homes may look nice but they aren’t cheap http://www.carboncommentary.com/2008/01/14/69 http://www.carboncommentary.com/2008/01/14/69#comments Mon, 14 Jan 2008 16:51:55 +0000 Chris Goodall http://www.carboncommentary.com/2008/01/14/69 The Lighthouse by Potton The Lighthouse by Potton Carbon Commentary has visited two sites to look at the costs of building houses under the new rules (not yet mandatory) established by the Code for Sustainable Homes (CSH). By 2016, all new UK homes will have to have no net carbon emissions (‘Level 6’) and the implications for construction techniques are profound. Today, most homes are built to about Level 1, or possibly 2. To get to Level 6 will require huge changes in how houses are built, heated, and ventilated. And they will need expensive renewable energy technologies built into the home as well. At Wimpey’s 145-home development in Milton Keynes, construction costs of houses at Level 3 are running at ‘100-110%’ more than standard. The self-build company Potton is offering a Level 6 design (one of the first in the UK) for an even more expensive £180 a square foot, up from about £75 for a standard Level 3 model. This takes the construction cost of a standard 1,000 sq ft (92 sq metre) home up from £75,000 to £180,000. Much of the increment comes from the need to install large amounts of renewable electricity generation. Some of the cost premium over today’s badly insulated homes will eventually erode as builders get better at building air-tight houses. But we shouldn’t be in any doubt about the huge implications of the CSH for builders, landowners, and buyers.]]> The Lighthouse by Potton The Lighthouse by Potton

Carbon Commentary has visited two sites to look at the costs of building houses under the new rules (not yet mandatory) established by the Code for Sustainable Homes (CSH). By 2016, all new UK homes will have to have no net carbon emissions (‘Level 6’) and the implications for construction techniques are profound. Today, most homes are built to about Level 1, or possibly 2. To get to Level 6 will require huge changes in how houses are built, heated, and ventilated. And they will need expensive renewable energy technologies built into the home as well.

At Wimpey’s 145-home development in Milton Keynes, construction costs of houses at Level 3 are running at ‘100-110%’ more than standard. The self-build company Potton is offering a Level 6 design (one of the first in the UK) for an even more expensive £180 a square foot, up from about £75 for a standard Level 3 model. This takes the construction cost of a standard 1,000 sq ft (92 sq metre) home up from £75,000 to £180,000. Much of the increment comes from the need to install large amounts of renewable electricity generation. Some of the cost premium over today’s badly insulated homes will eventually erode as builders get better at building air-tight houses. But we shouldn’t be in any doubt about the huge implications of the CSH for builders, landowners, and buyers.

(more…)

]]> http://www.carboncommentary.com/2008/01/14/69/feed Eco housebuilding http://www.carboncommentary.com/2007/11/26/59 http://www.carboncommentary.com/2007/11/26/59#comments Mon, 26 Nov 2007 23:14:20 +0000 Chris Goodall http://www.carboncommentary.com/2007/11/26/59 After decades of foot-dragging, the UK construction industry has begun to see the importance of good insulation and higher environmental performance. Large housebuilders are beginning voluntarily to build their major developments to a better standard than required by building regulations. Housebuilders also see the increasing commitment by government to increasing the mandatory standards for home insulation and other environmental characteristics. By 2016, all new homes will have to be ‘zero carbon’. A report just released by estate agents Knight Frank examines whether buyers are prepared to pay the cost of the eco-improvements. The answer seems to be a cautious ‘yes’.]]>
After decades of foot-dragging, the UK construction industry has begun to see the importance of good insulation and higher environmental performance. Large housebuilders are beginning voluntarily to build their major developments to a better standard than required by building regulations.

Housebuilders also see the increasing commitment by government to increasing the mandatory standards for home insulation and other environmental characteristics. By 2016, all new homes will have to be ‘zero carbon’.

A report just released by estate agents Knight Frank examines whether buyers are prepared to pay the cost of the eco-improvements. The answer seems to be a cautious ‘yes’.

(more…)

]]> http://www.carboncommentary.com/2007/11/26/59/feed The eco-homes at Bladon, near Oxford http://www.carboncommentary.com/2007/10/01/23 http://www.carboncommentary.com/2007/10/01/23#comments Mon, 01 Oct 2007 16:31:33 +0000 Chris Goodall http://www.carboncommentary.com/2007/10/01/23 New UK housing has insulation standards that do not come close to matching the best northern European levels. Individual homeowners and ethical investors have built single 'eco-homes' but a small new development in Bladon, Oxfordshire is among the first to be speculatively built by a mainstream housebuilder. The new houses are not 'zero-carbon' and do not use the Passiv Haus technologies pioneered for low-emissions housing in Germany. But they are a substantial improvement on most mass-produced homes. Will they make the builder more money? No, says the company, but the experience it has gained will enable it to build eco-homes at a more competitive price in the future. These nine houses each cost over £40,000 more than their draughty Persimmon equivalents. The builder expects the price premium to be slightly less.]]> New UK housing has insulation standards that do not come close to matching the best northern European levels. Individual homeowners and ethical investors have built single ‘eco-homes’ but a small new development in Bladon, Oxfordshire is among the first to be speculatively built by a mainstream housebuilder.

The new houses are not ‘zero-carbon’ and do not use the Passiv Haus technologies pioneered for low-emissions housing in Germany. But they are a substantial improvement on most mass-produced homes. Will they make the builder more money? No, says the company, but the experience it has gained will enable it to build eco-homes at a more competitive price in the future. These nine houses each cost over £40,000 more than their draughty Persimmon equivalents. The builder expects the price premium to be slightly less.

(more…)

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