Hello Matthew Kwan,
Generally there are two approaches for extending the YAxis range -- one is by manually setting the axis range (+ AutoScale=false), and the other is by setting the AxisY.AxisMode
property to "Extended" (setting this property automatically extends the axis range by 1 step).
However, I do not think that you will get the best result by setting the AxisMode property in your scenario (the step on your YAxis is rather small, and even when the axis is extended by 1 step, there probably will not be enough space above the bar for displaying the "1000" label vertically. You will probably need to consider setting the axis range manually or displaying the item labels horizontally.
the Telerik team