Any part of the extension is not higher than the highest part of the roof of the existing house.
Planning portal roof extensions.
From the design stage to planning through to working out costs and the actual build project building an extension is a big commitment.
Any alteration to project no more than 150 millimetres from the existing roof plane.
Roof pitch must match existing house as far as practicable note that this also applies to any upper storey built on an existing extension.
About planning portal adverts if you want to add a conservatory to a house then this falls within the same set of planning rules as any other home extension.
What to consider before planning an extension find a trade professional use our partner directories from riba fmb rtpi or cieem to find an architect builder planning consultant or ecologist to help with your project or development.
Lean to single pitch roof.
Conservatory extensions single storey extensions two storey loft conversion outbuildings porches.
These rules known as permitted development rights allow you to extend a house without needing to apply for planning permission if specific limitations and conditions are met.
Single storey rear extensions must not extend beyond the rear wall of the original house by more than 4m if a detached house.
If the extension is within 2m of a boundary maximum eaves height should be no higher than 3m to be permitted development.
Roof pitch of extensions higher than one storey to match that of the existing house as far as is practicable.
Extensions of more than one storey must not extend beyond the rear wall of the original house by more than three metres or be within seven metres of any boundary opposite the rear wall of the house.
Advice and guidance for home owners on extensions alterations additions.
Please select the appropriate volume calculator below.
The need for extra living space and not wanting to leave your current home are two of the main reasons for building an extension.
About planning portal adverts.
If the development is within the curtilage of a listed building you may need to submit a planning application for the work.
Planning portal 2019.
However permission is required where you extend or alter the roof space and it exceeds specified limits and conditions.
About planning portal adverts planning permission is not normally required.
Extensions two storey 5 roof pitch.
Dormer window flat roof.