About 10 men with bats, a crowbar, a hammer and other weapons broke into the house in Collins Street at about 7pm on Monday.
Windows were smashed, interiors were damaged and a woman was injured by what is believed to have been a pellet gun.
Police are now appealing for witnesses and say the men are believed to be in their late teens or early 20s.
A spokesman for West Midlands Police said: "We were alerted at 7pm last night to a group of men breaking into a house in Collins Street, Walsall, armed with bats, a crowbar, hammer and other weapons.
"Windows were smashed and the interior damaged. A woman suffered a minor injury believed to have been caused by a pellet gun.
"It’s understood there may have been around 10 offenders who were wearing face coverings; they are believed to be in their late teens or early 20s.
"Enquiries are under way and any witnesses or anyone with information is asked to contact us on Live Chat via the website or call 101 quoting log 4068 from 7 Sept."
Claire Brown, spokeswoman for West Midlands Ambulance Service, said: "We were called at 7.11pm to Collins Street, Walsall. An ambulance and paramedic officer attended and treated one woman who had sustained minor injuries. She was conveyed to hospital for further checks."