When you're looking to build your new retaining wall you want to make sure you're hiring the right person, firstly, and that you're not paying too much. To hire a landscaper you're looking at spending $150 to $250 per square metre for retaining walls, soft scaping will be $50 to $75 per hour, and water feature construction can cost as much as $9,000 to $25,000 per project depending on the size. To find out more about landscaping costs, see our landscaping cost guide.