Ok, I remember practically zero info about this book but it's tormenting me.
- Protagonist is a girl aged about seven or eight from a largish family - There is a change of circumstances - The family move from the 'ggod' side of the town side to the other side which is much less modern. - The house has a red roof. Think this is significant - can't remember why, though.
I would have been aged maybe age 8 or 9 when I read this, around the time I read What Katy Did Next, so mid 1980s. I lived in Ireland but I don't think it was an Irish book.