Offenders forced their way into a house on Bower Street, Carlisle, early on Saturday evening, Cumbria Police said.
A 39-year-old man was taken to hospital with a serious head injury. A woman, also 39, had her finger broken.
Three men aged 33, 26 and 23 and a 31-year-old woman, all from Carlisle, have been charged with aggravated burglary and are due in court later.
The injured man remains in hospital.
Four people have been charged in connection with a hammer attack which left a man seriously injured.