An alleged intruder fell through the ceiling of a Ballajura home before barricading himself in a bedroom in a frightening incident overnight.

A family of four were at home when the intruder allegedly climbed through the roof onto the ceiling of the Illawarra Crescent home about 8pm.

In a post to the Ballajura Community and Crime Watch page the owner said he managed to corner the intruder in a main bedroom before police arrived.

“Just had an intruder break into my house while the wife and two kids were home on Illawarra Crescent South Ballajura,” he wrote.

“He climbed through the roof and fell through the ceiling lucky I was around the corner and scared him and confronted him. (He) lock(ed) himself in the main bedroom and waited for the police to come.”

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Police have taken a man in his 40s into custody and taken him to hospital for assessment.

Inquiries are ongoing and no charges have been laid.