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Details of Permitted Development allowances or P.D. P.D.A Summary Permitted Development Rights come with most houses, and they enable you to build a certain additional volume without planning permission Permitted Development Rights enable you to extend up to 15% of the existing house in volume, or 70m3, whichever is greater. For terraced houses, this is reduced to 10% or 50m3, in both cases, the maximum enlargement is 115m3, the volume is reduced to 10% or 50m3 within a conservation area. The extensions must be no higher than the existing house. Loft dormers are allowed if it adds less than 50m3 to the volume of the house (40m3 in terraced houses) The dormer must not face the highway and it must not be higher than the existing roofline. If your planned loft does transgress on any of these points, it doesn't mean that it is prohibited, but you will have to apply for planning permission. |
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