Extension under permitted development what sort of plans needed?

[Berrie]

Hoping someone can help.
What sort of plans do we need for a rear 6m extension under the temporary permitted development rules?
DH sort of adapted and redrew previous plans on a previous proper planning application but this one will involve RSJ's so not sure how all that is done - would it be part of building regs?

Yes, you will need building regs approval regardless, we have just gone through exactly the same process. We employed architect but in hindsight wouldn't bother as a) he was crap and b) too expensive. A good builder will do all drawings for you and are and bc site visits etc, still takes a while for bc to look at plans once submitted and we had to make 1 or 2 minor tweaks but less stressful than planning

Think you will need a structural engineer for steel beam calcs (but could be wrong).

Yes forgot to mention that too, cost us £350

Thanks for the replies.
Is an architect also a structural engineer or are they different?
If the neighbours don't like it under the consultation scheme how likely do you think it is that we will get permission?
We've already thrown goodness knows how many hundreds of pounds at a side extension and major surface water sewer diversion plan which turned put to be too expensive to do. Don't know whether to just give up!

Structural engineer different, under permitted development it doesn't really make a difference if they like it or not, as long as it complies with build regs it would go through, they can lodge a nite of their unhappiness with design but reality us v little they can do

Thanks

Kieron with the temporary 6m permitted development, there is obligatory consultation built into the legislation, unlike the 3m. If there is an objection, a site visit is made and, I think, it is light and privacy they can take into account and a decision made in a similar way to regular planning permission. If the PD is refused, there isn't a right of appeal as such, but they can re-submit the designs ad infinitum, as I understand it, until sometime in Spring 2016, as the extra 3m lasts until the end of May 2016.