Hello,

I am in the latter stages of having an extension built (ok I'll be doing
some of the decorating myself so this post is nominally on topic!) and the
builders have just knocked through. The opening - it's not really a doorway
because there is no door on it but I don't know the proper technical term -
is about 600mm wide.

Now it is fine for us to use at this width, and we are exempt from Part M of
the regs (as far as I can make out) because it is an extension to an
existing dwelling and we haven't removed a WC (we've added one though. I bet
this shafts us somehow!), but I would like to know if there is a minimum
"non-door containing doorway" or "opening without a door" width for
extensions to existing dwellings. If there isn't the all well and good, but
if there is and it's more than 600mm then the builders and I will have to
have words!

Thanks for any help you great people in uk.diy land can give.

Dean.
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Swap nospam for bluerose to reply personally.