Application
The Code is a 6 level rating system with credits in a broad range of categories from water use to occupant health. There are simple and inexpensive methods of gaining credits, like specifying compost and recycling bins, and costly methods such as installing solar photovoltaics.
Currently, compliance with higher levels of the Code is voluntary, with a long-term view for step-change increases. However, landowners and agents are already selling sites with stipulations to build at a certain Code level.
The extra-over cost of building to Code Level 3 is valued between around £2000-3000, additionally the Code assessment costs around £2000 for a small project, the total cost of this is typically under 5% of a standard build.
Code levels pertaining to energy require a Dwelling Emission Rate (DER) a certain percentage lower than the Target Emission Rate (TER) as set in Part L1A of the Building Regulations. The October 2010 version of the Code saw Part L 2010 TER standards rise equivalent to Code Level 3. Since this change Code Level 4 requires 25% DER improvement over Part L1A 2010 TER standards and Code Level 5 requires 100% improvement i.e. thermally twice as efficient. It is also anticipated that the Building Regulations as well as the minimum mandatory Code level will continue to improve until the 2016 target of 'net zero CO2 emissions' is met. Guidance is also available via the Code's simply explained published document to clarify the technical requirements.
Read more about this topic: Code For Sustainable Homes
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