Hi,
This will require planning permission.
Unfortunately the Article 4 blocks C3 to C4, but doesn't block C4 to C3.
So once you have gone to C3, you need planning to go back to C4.
Yes, you could apply yourself, but I would recommend a planning consultant. You will need a good justification and also meet other criteria. If these are not met, then refusal may easily happen.
We do a few of these with Bristol - but the concern is the loss family homes.
They will also look at what is called sandwiching and density of HMOs in a radius.
Unfortunately there is no guarantee with any article 4 - but we also will not accept an instruction if we know that permission will be refused. Some others might.
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