A loft conversion can create valuable extra space, but the planning position depends on the roof design, the size of the proposed alteration and the property. Some roof alterations may be permitted development, while others require a householder planning application.
Do loft conversions need planning permission?
Some loft conversions can be carried out under permitted development rights if the proposal meets all the relevant conditions and limitations. The permitted development rules include restrictions on roof volume, height, position, materials and certain types of opening. Designated areas and restrictions on the property can affect the available rights.
What about rear dormers?
Rear dormers are a common way to create usable headroom and floor space. Their acceptability depends on their dimensions, position, roof form, materials and the planning constraints affecting the property. A dormer that appears modest from the garden may still need permission if it does not meet the permitted development rules.
Are front dormers treated differently?
Roof alterations on a principal elevation facing a highway can be subject to tighter restrictions. The orientation of the house and the relationship between the roof slope and highway should be checked carefully.
Planning drawings for a loft conversion
A planning submission may need existing and proposed roof plans, floor plans, elevations and sections. Sections are particularly useful for showing the relationship between the new floor, roof structure, dormer and available headroom.
Building regulations are a separate requirement
Even where planning permission is not required, building regulations may apply. They cover matters such as structural stability, fire safety, escape routes, insulation, ventilation, stairs and other construction requirements. A planning drawing set is not a substitute for building regulations information.
Structural design
Loft conversions often require structural input. Robert Blake Designs does not provide structural engineering or structural design services. Structural calculations, beam and lintel design, steelwork design and other structural work must be commissioned separately from a suitably qualified structural engineer.
Robert Blake Designs prepares planning drawings and supports planning applications and Lawful Development Certificate submissions for loft conversion proposals in Harlow, Essex and nearby Hertfordshire.
Loft conversion drawing service · Contact Robert Blake Designs
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