Webstill, using vacant land to construct a new home can be a worthwhile pursuit. However, whether you are buying vacant land in ontario or buying vacant land on the. Webwhen you buy land or an interest in land in ontario, you pay land transfer tax. Webyou may qualify for a rebate of part of the gst or hst that you paid on the purchase price or cost of building your new house, on the cost of substantially renovating or building.