MR Meehan, who has been acting chief executive since February, replaces Onthehouse founder Michael Fredericks who resigned from the top job in September last year.
His appointment follows several board changes in recent months, including the appointment of Emily Santucci as chief financial officer and Andy Antonini as chief operating officer.
Mr Fredericks resigned after legal action was launched against him in Queensland in regards to a trust in which he was trustee of, however the matter was not linked to Onthehouse.
Onthehouse, which provides free access to property values and real estate information, listed on the Australian share market in 2011.
Investors cheered Mr Meehan's appointment, sending on the house shares up by five cents, or 8.55 per cent, to 63.3 cents at 1552 AEST.