Quick Answer
Renovation quotes vary because contractors are rarely pricing the same thing. Differences in assumed scope, material grades, allowances, labour quality, overhead, insurance, warranty, and how much "unknown" work is built in can swing the same Greater Toronto Area project by tens of thousands of dollars. A low number often means items were excluded or under-allowed, not that the work is genuinely cheaper.
The biggest reason: each quote assumes a different scope of work
The single largest cause of price swings is that contractors are quoting different scopes, even when you describe one project. A bathroom "renovation" can mean a like-for-like swap of fixtures, or it can include moving plumbing, re-waterproofing, new electrical, a curbless shower, heated floors, and a vanity wall rebuild. If one contractor assumes the smaller scope and another prices the full rebuild, their numbers will look wildly different for what you thought was the same job. The same happens at every scale: a basement at $25k assumes finishing an open space, while $65k may include a bathroom, egress, and built-ins, and a legal basement apartment runs higher again (~$60k to $120k) because of permits, fire separation, and a second egress. Always compare quotes line by line and ask each contractor to list exactly what is included and excluded. At Leo Constra we itemize scope in writing so you are comparing apples to apples, not a stripped estimate against a complete one. All numbers are estimates until a site visit.
Material grades and allowances quietly move the price thousands
Two quotes can use identical labour but land far apart purely on materials and allowances. Tile from $2 a square foot versus designer porcelain at $15, builder-grade cabinets versus custom boxes, laminate versus quartz, big-box vanities versus millwork, standard versus premium plumbing fixtures, all of this compounds. Many low bids hide a thin "allowance" for finishes, so the quote looks attractive until you pick real tile and the price climbs through change orders. A kitchen can run anywhere from $25k to $75k almost entirely on cabinet, counter, and appliance choices. Flooring alone spans roughly $3k to $15k depending on whether you choose luxury vinyl plank, tile, or hardwood. When you compare quotes, check the allowance amounts, not just the bottom line, and confirm whether the figures reflect the finishes you actually want. A realistic GTA quote should name material grades or carry allowances generous enough to match your taste. Final pricing follows a site visit, and HST is extra on all estimates.
Labour, overhead, insurance, and warranty are real costs some bids skip
A meaningful share of the spread comes from what is behind the price, not just the finishes. A licensed, insured, WSIB-cleared contractor carries liability coverage, workers' compensation, permit and inspection costs, skilled trades, project management, and a written warranty, all of which sit inside the number. A cash, under-the-table crew can quote less because it skips those protections, leaving you exposed if someone is injured on your property or the work fails. That gap is often the difference between a low bid and a fair one. Overhead also varies legitimately: established firms staff supervision, scheduling, and cleanup that smaller operators offload onto you. Quality of labour matters too, since correct waterproofing, framing, and electrical cost more upfront but prevent expensive failures later. Leo Constra carries full insurance, WSIB clearance, 20-plus years of experience, and a 2-year written workmanship warranty, and those are priced in honestly rather than stripped out to win the job. Ask every contractor to show proof of insurance and WSIB before you compare a single dollar figure.
Unknowns, site conditions, and contingency: who priced the risk
Quotes also vary based on how each contractor handles the unknowns behind your walls. Older GTA homes, especially in Toronto, Hamilton, and established Vaughan and Markham neighbourhoods, often hide knob-and-tube wiring, lead or galvanized plumbing, asbestos, uneven framing, foundation moisture, or undersized panels. A thorough contractor inspects the site, anticipates these issues, and either prices them in or names a clear contingency. A contractor who quotes sight-unseen, or deliberately leaves risk out to look cheap, will recover it later through change orders once demolition exposes the truth. That is why a careful estimate sometimes reads higher: it reflects the real condition of your home rather than a best-case fantasy. Permit requirements add another variable, since structural changes, plumbing relocations, and any second dwelling unit typically need permits, and timelines and fees differ by municipality, so confirm with your local building department. A quote that accounts for permits, inspections, and likely surprises is more trustworthy than the lowest line on the page. We always quote after a site visit so the number you sign reflects your actual project.
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