A "general contractor" is the person who carries the whole job: pulling permits, scheduling the trades, managing the budget, and standing behind the warranty. In the GTA that role doesn't come cheap, because everything underneath it — framers, electricians, plumbers, drywallers, City of Toronto permit fees — runs well above the national average. As a rule of thumb in 2026, a managed general-contracting project lands anywhere from about $50K for a focused single-room renovation to $400K+ for a full-home gut or a two-storey addition. The biggest swing isn't the contractor's markup (typically 15-25% of hard costs) — it's scope, finish level, and whether you're touching structure, the envelope, or mechanicals. Below is how the numbers actually break down across Toronto, Mississauga, Vaughan, Brampton, Markham, Oakville and the rest of the service area, based on what jobs are closing at this year — not 2019 prices.
What it costs
Focused Renovation
$50,000 - $110,000
A single major room or a light cosmetic refresh across a floor — a mid-range kitchen, two bathrooms, or flooring, paint and trim throughout with minor layout changes. GC coordinates 4-6 trades, pulls an interior-alteration permit where required, and the structure and mechanicals stay largely as-is.
Best for: Homeowners updating one high-impact space or refreshing a recently-built home without moving walls
Whole-Floor / Multi-Room Renovation
$110,000 - $220,000
A gutted main floor or a finished basement plus kitchen, or a full top-to-bottom refresh of a 1,500-2,000 sq ft home at mid-range finishes. Expect to land near $100-180/sq ft. Some wall removal, partial rewiring and re-plumbing, new HVAC runs, and a fuller permit set.
Best for: Families reworking how a home functions — open-concept conversions, finished lower levels, dated homes brought current
Full Gut or Mid-Size Addition
$220,000 - $400,000
A complete down-to-studs gut of a 2,000-2,500 sq ft home, or a single-storey rear/side addition (300-700 sq ft). New mechanicals, structural beams, envelope work, and high-quality finishes. Additions run $300-550/sq ft; high-end gut renos hit $450-550+/sq ft.
Best for: Older Toronto/Etobicoke/Oakville homes needing structural change, or growing households adding real square footage
Custom Build / Luxury Whole-Home
$400,000 - $1.5M+
A two-storey addition, a tear-down rebuild, or a custom home. GTA custom builds run $400-600/sq ft standard and $650-900+/sq ft luxury, so a 2,500 sq ft home is roughly $1M-$1.5M in hard costs before 20-30% soft costs (design, engineering, approvals).
Best for: Homeowners building new or doubling a home's footprint, where design, engineering and approvals are a project in themselves
Where the money goes
What moves the price
Scope: cosmetic vs. structural vs. addition
The single biggest lever. Cosmetic refresh runs $100-200/sq ft; a full gut $450-550+/sq ft; an addition $300-550/sq ft because you're building floor, walls, roof and envelope from scratch, not reusing what's there.
Finish level
Material and fixture selection can swing a kitchen from $25K to $75K+ and add $100-200/sq ft across a whole home. Stock cabinetry vs. custom millwork, laminate vs. quartz, builder-grade vs. designer plumbing — same footprint, double the budget.
Moving plumbing, electrical & HVAC
Relocating a kitchen or adding a bathroom means new supply/drain lines, a panel upgrade ($2,500-4,500), and HVAC runs. Touching mechanicals routinely adds $15,000-40,000 and triggers electrical (ESA) and plumbing inspections.
Permits, design & engineering (soft costs)
Toronto building permits run ~$70.50 per $1,000 of construction value (~$18.56/m² for additions) plus a ~$215 base fee and a ~$644 Zoning Certificate. Add architectural/structural drawings and you're at 8-15% of project cost — 20-30% on custom builds.
Hidden conditions in older GTA homes
Knob-and-tube wiring, asbestos, balloon framing, undersized footings and grade/drainage issues are common in pre-1960s Toronto and Etobicoke stock. Abatement and remediation commonly add $10,000-30,000+ once walls open up — budget a 10-15% contingency.
Municipality & site access
Permit timelines and fees differ across Toronto, Mississauga, Vaughan and Markham, and Committee of Adjustment minor variances add $3,000-8,000 and months. Tight downtown lots, no laneway, or condo logistics raise labour and disposal costs vs. open suburban sites.
Three questions, real numbers from 200+ Toronto-area projects. We'll email the range and a brief on what drives it up or down.
Step 1 of 3
Frequently asked
The honest answer to "what will my project cost" is that it's set the day you finalize scope and finishes — not by the contractor's hourly rate. Get a detailed, line-item quote that separates hard costs, soft costs (permits and drawings), and the management fee, and make sure a contingency is written in rather than discovered halfway through. General West Contractors works across Toronto, Mississauga, Vaughan, Brampton, Markham, Richmond Hill, Etobicoke, Scarborough, North York, Oakville and Burlington, and we'll walk you through these numbers against your actual home before a single wall comes down. Book a site visit for a real, scope-based estimate.
