A mega eight-storey family home - possibly one of Australia's tallest private dwellings - could be built on Footscray's main shopping strip.

The eight-bedroom, 12-bathroom home at 309 Barkly Street would be spread over seven levels above a new cafe, on a site currently occupied by a single-storey boarded up shop.

A drawing of the proposed eight-storey house on Barkly Street, Footscray.

The 30.15 metre development could ultimately stake a claim as the southern hemisphere's tallest private home, eclipsing the 30-metre Girvan Estate in the Hunter region of NSW as Australia’s current record holder.

Constantine Luhan, who snapped up the existing 246-square-metre property in 2012 for $540,000, has lodged the plans for the soaring home with Maribyrnong Council. Mr Luhan declined to comment on his ambitious plans.