Low headroom lofts & ceiling lowering

Maybe you've been up in your loft, found that you can't stand up there, and decided that you can't have an extra room up there? Perhaps another loft conversion company has even told you that you can't have loft conversion for this very reason,

The plan attached shows a section with the ceiling lowered and the need floor of the loft lower than the loft height to gain the extra head room to make the new loft room work and have a enough head room.