
Buildo box lid
’These models … provide amusement and instruction in the design and form of our unrivalled English homes.’

Buildo parts
I have a number 1 set which of course will only build the more simple models, but this page from the manual shows what was possible with larger sets.

Buildo manual page
The set was made by Alldays of Birmingham, who according to a quick internet search seem to have been primarily printers of postcards, posters and souvenir brochures, active from at least 1900 to the 1950s.
My only basis for dating this set (as with so many in my collection) is the image on the box cover as there are no hints in the box or manual text. The dress worn by the lady at the porch suggests Victorian or Edwardian, but if the designer is going for nostalgia then there’s no guarantee it is meant to be contemporary, in which case the set might well be ’20s or ’30s.
If anyone has more information I’ll be delighted to be corrected.