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Second Storey Extension on top of an existing extension

Anonymous user 28/02/2024 - 3.07 PM

We have recently found out that our 3 bed detached house was previously Granted Planning Permission (1984) for a second storey extension over an existing single storey extension. There are sufficient footings and there are no problems with being close to the neighbours therefore reducing the light etc. The original plans were to build over the existing extension a further bedroom and en-suite, however, we are looking into building two bedrooms with a Jack-and-Jill en-suite between and going into the loft (from the smallest existing bedroom) creating a master suite with an en-suite and dressing room therefore creating a 5 bed detached house. My questions are... 1. do we need planning permission due to the change of planning law 2. how long would it take to build - approximately We look forward to hearing your comments and advice

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1 Answer

Anonymous user

Hi Dnkenney, I'm an architect from London and my experience has been that usually planning permission has an expiration date to it which is either 3 or 4 years. Given that planning was granted in 1984, I would think that you would definitely need to re-apply for planning permission. In terms of the length of time involved, I would break this answer down in 2, the first being the design and planning end of things. Depending on the complexity of the project it usually takes a few weeks to agree a design with an architect and arrange for the relevant surveys. From here you applying for planning will take approximately 10 days for validation of the information followed by 8 weeks review before planning is granted or rejected. The second part of this would be the construction end of things, and again this depends on the complexity of the design, so it's not an easy answer but after initial plans are drawn up, it can be discussed with your chosen contractor to give you a better idea of both cost and programme. Hope that helps. Regards, Ben

Answered26 October 2014