If you’re planning to build a home or undertake a major renovation in Canada, you’ll inevitably encounter a General Contractor (GC). Today, we’ll break down exactly what a GC does and honestly explain their cost structure — one of the most frequently asked questions in residential construction.
1. Who is a General Contractor (GC)?
In simple terms, a GC is the “orchestra conductor” of a construction project. Beyond just swinging a hammer, they oversee the entire project — from planning and workforce management to budget execution and permit acquisition.
- Subcontractor Management: They hire and coordinate specialists in electrical, plumbing, carpentry, and other trades (Subcontractors).
- Schedule & Materials Management: They source materials and coordinate schedules to keep the project moving without interruption.
- Risk Management: They respond to unexpected situations on the job site and take full responsibility for the final outcome.
2. GC Cost Structure: Is a 10–20% Markup Reasonable?
This is the most sensitive question. Many people ask, “Isn’t a GC markup around 5–8%?” But in the residential renovation market, 10–20% is the industry standard. Here’s why:
✅ Rate Differences by Project Scale
| Project Type | Typical Markup | Reason |
|---|---|---|
| Large Commercial Projects | 5–8% | High contract value covers overhead at lower rates |
| Residential / Renovation | 10–20% | Smaller scale with more variables — higher margin needed |
✅ Markup ≠ Pure Profit
The 20% markup a GC receives actually covers the following hidden costs:
- Overhead: Office maintenance, vehicle expenses, license renewal and administrative fees.
- Insurance: Liability insurance premiums for on-site accidents — these are more expensive than most homeowners realize!
- Contingency: A buffer for unexpected risks — mold discovered behind walls, sudden material price increases, and other surprises.
💡 Tip: Think of this cost as paying someone to manage your time and stress. It’s the price you pay to avoid the headache of sourcing, scheduling, and managing each tradesperson yourself.
3. Three Steps to Hiring the Right GC
| Step | What to Check | Why It Matters |
|---|---|---|
| 1️⃣ License & Insurance | Verify contractor license number and insurance certificate | No legal protection without a valid license |
| 2️⃣ Reputation | Read reviews from past clients, check references directly | Clean finishes and reliability matter more than a polished portfolio |
| 3️⃣ Detailed Quote | Request itemized quotes with materials, brands, quantities, and labour | Vague “all-in” estimates are a red flag |
Final Thoughts
Hiring a General Contractor isn’t just about spending more money — it’s like taking out an insurance policy for a successful project outcome. Understanding their cost structure helps you make confident, informed decisions for your home renovation or new construction project in Canada.