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An extension or addition to your house may be permitted development, not requiring an application for planning permission, subject to limits and conditions.
Fitting, altering or replacing an external flue, chimney, or soil and vent pipe is normally considered to be permitted development, not requiring planning consent, subject to conditions.
In many cases installing a flue on non-domestic buildings as part of a biomass heating system, or a combined heat and power system, is likely to be considered 'permitted development' with no need to apply to the local planning authority for planning permission.
Installing a ground or water source heat pump in the grounds of a non-domestic building is likely to be considered 'permitted development' with no need to apply to the local planning authority for planning permission.
Planning permission is not normally required. However, permission is required where you extend or alter the roof space and it exceeds specified limits and conditions.
Adding a porch to any external door of your house is considered to be permitted development, not requiring an application for planning permission, subject to conditions.
In many cases fixing solar panels to the roof of a single dwelling house is likely to be considered 'permitted development' under planning law with no need to apply for planning permission.
In many cases installing solar panels on non-domestic land is likely to be considered permitted development with no need to apply for planning permission.
If you are unsure about the status of trees which you intend to prune or fell (or you simply require further information) you should contact your Local Planning Authority.
Minor extensions to industrial buildings and warehouses, including putting up additional buildings within the curtilage, may not require planning permission.
The installation, alteration or replacement of a stand alone (not building mounted) wind turbine within the boundaries of a dwellinghouse can be considered to be permitted development, subject to conditions.
You do not necessarily need planning permission to work from home. The key test is whether the overall character of the dwelling will change as a result of the business.