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.

Its survey of manufacturers, retailers and the services sector showed a balance of 6% reporting increased business, the lowest since May 2013.
The economy has had a "tough start to the year", said Rain Newton-Smith, the CBI's director of economics.
Official figures last week put UK growth at 0.5% in the last quarter of 2015, the slowest for three years.
Ms Newton-Smith said: "Manufacturing and business and professional services have struggled to make a mark, but a healthier picture can be seen in the household-focused consumer services and retail sectors."
Output from professional services firms - including telecoms, computing and legal services - slowed down the most, according to the CBI Growth Indicator.
The CBI figures signalled only "modest" growth in the next three months.
Reports have suggested the Bank of England will this week cut its UK economic growth forecasts to around 2.3% for 2016, compared with 2.5% in November.
The central bank will release its latest inflation report on Thursday, when it will also keep interest rates unchanged amid concerns about global economic volatility.
A Treasury spokesperson said: "Despite turbulence in the global economy, Britain is pushing ahead and continues to grow steadily."

The Ghana international, 22, made 51 appearances for Bundesliga side Augsburg before moving to Stamford Bridge on a five-year deal last August.
Raman made his Chelsea debut in the Champions League and went on to make 23 appearances for the Blues.
His return to Germany reunites him with former Augsburg manager Markus Weinzierl, who took over as Schalke manager in June.
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Yanic Wildschut went close early on for the Latics when he cut inside and drove a shot against the upright.
Billy Clarke failed to make contact with Jamie Proctor's dangerous cross for the visitors after the interval.
And Vuckic ensured Wigan would remain second in the table with a composed finish before Wildschut drove wide as he attempted to add a second.
Defeat cost play-off hopefuls Bradford their place in the top six, with Yorkshire rivals Barnsley winning at Fleetwood.
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Wigan manager Gary Caldwell told BBC Radio Manchester: "I think we were always the team on the front foot. They made it difficult for us.
"I thought we kept going and showed great character, great belief in what we were doing, kept passing the ball and got our reward in the end."
Four people have been charged in connection with a hammer attack which left a man seriously injured.
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The UK economy grew at its slowest rate since mid-2013 in the three months to January, according to the CBI.
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Schalke have signed Chelsea defender Baba Rahman on a season-long loan.
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Wigan extended their unbeaten run to 16 games as Haris Vuckic's goal gave them victory over Bradford City.