"Peter Crosland" wrote
| "Chris Allmark" wrote
| Thanks to everyone who has replied so far. The ceiling height
| of the existing bedrooms is around 2.5m, so it would be possible
| to lower these by 30cm or so.

AFAIK there is no minimum headroom requirement for rooms but there *is* for
stairs, so you might not be able to bring your stairs up close under a
slopey bit of roof.

| As regards changing the roof from a hip to a gable - would
| that require planning permission as well as the building
| regs?
| Almost cetainly.

And is quite likely to be refused as the OP is in a semi, and the planners
are likely to be unhappy about changing the shape of one side but not the
other.

Owain