Every Renovation Seems to Cost More Than Expected. Here’s Why.
Budget overruns are one of the most common complaints in Calgary renovations. But they’re not inevitable. Understanding why they happen is the first step to preventing them.
The 5 Most Common Causes of Cost Overruns
1. Incomplete Scope at the Start
The most common cause. The quote only covers what was visible and discussed. When demo reveals old plumbing, knob-and-tube wiring, or water damage, the scope expands. This isn’t always the contractor’s fault — but it can be minimized with thorough pre-construction investigation.
Fix: Ask your contractor to do a pre-construction investigation (pull permit, do a test demo in key areas) before finalizing the contract.
2. Allowances That Are Too Low
Contracts with “allowances” for tile, fixtures, and appliances let you upgrade items during the project. But when the allowance is $2,000 for countertops and you fall in love with a $4,500 slab, that’s a $2,500 overrun — on you.
Fix: Make all your material selections before the contract is signed so there are no allowances — just actual prices.
3. Scope Creep
“While you’re in there, can you also…” These mid-project additions always cost more than if they’d been planned from the start. That’s not cheating — it’s the reality of mobilization costs.
Fix: Make your wish list exhaustive before signing. Include “stretch” items in the contract even if you’re not sure you’ll do them. It’s cheaper to remove scope than add it.
4. Hidden Conditions
Pre-1980s homes in Calgary often have asbestos, galvanized plumbing, knob-and-tube wiring, and rotted subfloors. These are real costs that can’t be anticipated perfectly.
Fix: Budget a 10–15% contingency for projects in older homes. If you don’t use it, great. If you do, you’re prepared.
5. Low-Ball Contractor
A contractor who wins the bid at 30% below everyone else either missed scope or plans to make it up in change orders.
Fix: Compare quotes by scope, not just price. Ask what’s excluded. The cheapest quote is often the most expensive job.
The Contingency Rule
| Project Type | Recommended Contingency |
|---|---|
| New build (all new) | 5–10% |
| Modern home renovation (2010+) | 10% |
| 1990s–2000s home renovation | 10–15% |
| Pre-1990s home renovation | 15–20% |
| Heritage/character home | 20–25% |
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⚠ Estimate Disclaimer: These are only ROUGH estimates that can vary wildly. Do not take these numbers as gospel. Having a defined scope of work and exact selections will give you clarity.
Red Flags That Suggest Overrun Risk
- Contract has lots of unit pricing and allowances (not fixed prices)
- No mention of “exclusions” section in the contract
- Contractor hasn’t visited the site for the quote
- No line item for permits and inspections
- Timeline is unrealistically short
How Olympic City Handles This
We work on fixed-price contracts with fully defined scopes. When we discover hidden conditions, we price them transparently as a formal change order — not a “while you’re here” verbal agreement. You know what it costs before we proceed.
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