Board, taping, mudding, texture matching, plaster repair and ceiling repair.
$2 to $5 per sq ft
Supply, board and finish per square foot of wall area. Excludes framing, insulation and painting.
We hold no licence to check for this category, so insurance and WSIB clearance are what a homeowner compares. That says what we hold, not what the province requires: nobody here has checked whether Ontario licenses this work. References and a written scope do the work a licence check would otherwise have done.
You asked for the trade Drywall and plaster, and the words "load calculation and sizing". Of the 12 businesses listed, none match every one of those.
The cost band and the licence requirements above still apply. They are what you need to judge a quote from anywhere else: whether the price is in the range, and whether the person quoting is allowed to do the work at all.
Listings here are seed data for demonstration and are labelled as such on each profile. Cost bands are what GTA homeowners are typically quoted, not offers. Always confirm a licence number against the issuing registry yourself before work starts.