moving a kitchen and bathroom

You want a *bathroom* off the kitchen?? Well!

No; in fact they no longer (if they ever did) require a ventilated lobby between a WC room and a kitchen (subject to certain provisions re ventilation and handwashing basin).

There are however regulations about "internal rooms" ie rooms accessed only through another room. Any work involving moving rooms or changing the interconnections between rooms is likely to be notifiable and require a Building Regs application.

Owain

In tens of thousands of terraced houses, where the bathroom was added as an amenity in later years, there is not much choice but to have a bathroom off the kitchen

He's talking in the present tense - as if he wants to do this.

My surveyor told me the ventilated lobby between kitchen and bathroom was never required, but was a very common misreading of the building regs even by some architects and BCO's until the wording was changed to clarify it.

It was required under the Public Health Act c1962 and compliance with this was a requirement if you were getting an improvement grant - back in my early BCO days (late 1970s) we were still seeing lots of grant aided bathroom extensions/conversions to older terrace houses.