Where a lawyer regulated by the Law Society of Saskatchewan tends to earn their fee is a genuinely complex file, a property with multiple owners, a commercial or mixed-use assessment, or a dispute that is heading toward a further appeal beyond the Board of Revision itself, rather than a straightforward residential comparison.
What actually wins a residential appeal is evidence: a factual error in the City's record, or comparable sold prices showing similar homes went for less than your assessed value. A lawyer does not manufacture that evidence, it has to come from real comparable sales either way.
If you want that evidence pulled properly before you file, that is worth arranging regardless of whether a lawyer is also involved. Get your hand-reviewed valuation from Joel Dyck.