Yes for almost any work that affects common property, the building structure, or services that pass through walls and floors. Cosmetic work inside your lot (paint, soft furnishings) usually doesn't need approval.
Three-tier approval is common: cosmetic (no approval needed), minor renovations (committee approval), major renovations (special resolution of the owners corporation). New flooring, bathrooms and kitchens almost always need approval because waterproofing and acoustic isolation are common-property issues. Get written approval before starting — retroactive approval is much harder.
Compare written fee proposals from strata managers covering your building — free for owners corporations, no obligation.