Planning permission is approved, confused on next steps

[johnny2007]

There is no standard two storey extension.

Ask any builder.
More or less they're all the same.

 

[freddiemercurystwin]

So the price and design should more or less the same then, begs the question why they need any drawings at all.

 

[johnny2007]

So the price and design should more or less the same then, begs the question why they need any drawings at all.

It will be more or less the same for the shell.
What makes the major difference are the details.

 

[freddiemercurystwin]

All the stuff that's missing from his SE quote you mean?