Part L2A of the Building Regulationsdetails the requirements for new build commercial premises andPart L2Bcovers those requirements that are necessary for conversions and extensions.
Part L2 of the Building Regulations dictates that five separate criteria should be met with some of the criteria being interdependent with each other:
1. Achieving an acceptable building CO₂ emission rate 2. Limits on design flexibility 3. Limiting the effects of solar gains in summer 4. Quality of construction and commissioning 5. Providing information (for the building operator)
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