If you'd like to be notified by e-mail when this page changes, use the MindIt button at the bottom of the page. I ask seems to have a different opinion. This is often a vexed issue, even for experienced investors. But it shouldn't be. More important are your budget and personal preferences, capital growth potential, and tenants' needs.
Houses tend to perform better in terms of capital growth, but only marginally.
This is because houses have more land, and land is primarily what drives property values. Some investors believe a house will entail high maintenance costs. A detailed condition report from an architect or building inspection service will uncover major defects. If there are problems, it's on to the next property. If you prefer the super-low maintenance option, or have a limited budget, units can be a brilliant alternative.