The 7 must-know numbers of the week, starting with Ron Medich's price hopes for Point Piper harbourfront

The price hopes Ron Medich has for his Point Piper harbourfront home, which has now been officially listed for sale. The harbourfront property had previously been quietly listed for sale, having never been publicly marketed in print or internet.

The percentage of new homes built in Sydney over the next four years that will be in existing areas, according to the NSW government's new Metropolitan Strategy discussion paper.

The price hopes for the Newport home of Manly Sea Eagles co-captain Jamie Lyon. Jamie and wife Ellie are off to Warriewood, where they are building a new home.

The house price growth in the Melbourne suburb of Essendon over the 12 months to March 2012, according to the Residex. Every Melbourne region had negative house price growth during the past year, with Essendon prices declining the most.

The amount of money the federal government will save in the next four years by axing green buildings tax breaks in the federal budget. The scheme had never come into effect, being shut down before it began.

The approximate sale price celebrity cook Donna Hay secured for her Paddington investment terrace. It was extensively renovated after being bought as an investment for $1.42 million in 2003.

The estimated value of a six-bedroom Braybrook home that was sold in a no-reserve sheriff's auction for $1,000. The sale was overturned by Victorian Supreme Court this week.