We are somewhat taken aback by the design stage energy efficiency rating and environmental impact rating that we have achieved for Clayhill Farm eco dwelling in Lavenham. By using super-insulative natural materials such as hemp, sheeps wool and wood fibre we have created a highly efficient building envelope that doesn't cost the earth. Hempcrete is cast into an inner studwork leaf to provide thermal mass to the internal spaces. An outer studwork leaf is filled with sheep wool and then the whole wall is wrapped with wood fibre board to ensure no cold bridging.
Planning approval for eco dwelling under NPPF55
In exceptional circumstances, planning permission may be granted for houses in the open countryside under clause 55 of the National Planning Policy Framework, formerly known as PPS7 Houses.
The criteria to meet these standards are very onerous. Clause 55 states that a new dwelling in the countryside will only be allowed under special circumstances, namely where the design is of exceptional quality or innovative, thereby helping to raise standards of design more generally in rural areas; reflect the highest standards in architecture; significantly enhance its immediate setting; and be sensitive to the defining characteristics of the local area.
We have just obtained planning consent after appeal for a house near Lavenham under this clause. It is one of the first houses in England to be granted approval under clause 55.
