It is possible to build small single-story extensions without obtaining full planning permission. However, you must meet all relevant planning and design criteria, and there must be no restrictions restricting or revoking your right to permitted development.
Generally, extensions and double-story additions require full planning permission, which can be obtained through a homeowner’s planning application. Planning permission is always required to extend flats and maisonettes since they do not have permitted development rights.
Some extensions require prior approval even though they are permitted developments. The local planning authority must first approve any application for prior approval before any work can begin.
For extensions likely to fall within permitted development, a lawful development certificate is the only way to ensure the extension is legal. You will need to do this if you are planning to sell the property in the future in order to avoid retrospective planning issues, enforcements, or penalties.
After planning permission is granted, it is likely that building regulations approval will also be needed, depending on the extent of the work.
You may still need planning permission even if your project complies with all permitted development criteria if there are hidden constraints that limit or remove your permitted development rights.
Even the simplest of projects can be complicated by hidden planning constraints.
It is mandatory for all types of developments to meet certain design criteria in addition to meeting all the necessary planning policies, which vary by the local planning authority. It would be necessary to obtain full planning permission if, for example, a 3-meter extension did not meet the design criteria.
Additionally, there are many hidden restrictions such as article 4 directions, section 106, conservation areas, and even just living under a flight path can limit your permitted development rights, so everything would require planning approval. Two houses in the same town could do the exact same development, but one could be built under permitted development while the other requires full planning permission.
Furthermore, specialist reports may also be required with all the usual supporting evidence and drawings. Heritage statements, flood risk assessments, transport surveys, and wildlife reports are just a few examples.
Besides obtaining planning approval, you will also need listed building consent and building regulations approval before any work can begin. Modifying a listed building without the necessary approvals is illegal.
We hope this article has been useful.
If you do need planning permission then don’t forget to invest in a good set of planning drawings.
Read also: Roof Top Repairs Can Save You Money
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