A fixed rate mortgage will ensure that your principle and interest remain flat over the course of the mortgage. Your taxes will fluctuate a bit from year to year. And, if you're in a condo, your condo fees will probably increase.
Still, the biggest chunk of that, by far, is principle and interest. And in today's economic climate, with home values declining in many places (even if the taxing jurisdiction raises the tax rate), your taxes are unlikely to adjust radically.
A good mortgage broker should be able to help further.
Hope that helps.