The owner of a Sydney demolition company says he feels "sick" and "gutted" after demolishing the wrong house.

When demolition workers from Daniel's Demolitions turned up to pull down an unoccupied three-bedroom home in Bankstown this morning, they assumed they were at the right place.

The letterbox read '200', indicating that they were, indeed, at 200 Marion Street, Bankstown.

Everything was going to plan until owner Steve Ballas arrived to find his home in ruins.

"It was all done without my approval," Mr Ballas told A Current Affair .

"All I know is I thought I owned 200 Marion Street, Bankstown, and it was a little house I was going to rent. But obviously I don't have that house anymore."

The property as it previously sat (Source: A Current Affair)

However, it turns out Mr Ballas doesn't actually own 200 Marion Street - despite what his letterbox may say.

He actually owns number 198.

A Current Affair have confirmed with the City of Canterbury-Bankstown that Mr Ballas' notices actually have 198 Marion Street printed at the top and that the house is where it would expect to be found: between numbers 196 and 200.

But until this morning, Mr Ballas was under the belief that the house he bought 15 years ago was actually number 200, not 198.

The home that was actually due to be demolished (Source: A Current Affair)

The council had approved the demolition of the real number 200, the house next door to Mr Ballas' flattened house.

Police have confirmed to A Current Affair that there are no suspicious circumstances surrounding the demolition.

The aftermath of the demolition bungle (Source: A Current Affair)