The asking price for the elongated abode is between $1.37 million and $1.5 million.
"The floorplan is something you don't see every day but it works well with the rest of the house which is generous in size," Belle Property Mona Vale residential sales consultant Stephen Allen told news.com.au.
"It's very, very interesting."
Bedrooms extend down the shaft of the home before opening into the living area and bathroom.
Somebody artistic or creative - or somebody with a sense of humour - is expected to grab this saucy structure.
"Most people are going to say it's a bit quirky for them, I can see that coming from families in particular," Mr Allen said. "It's ideally going to suit small families or first-home buyers."