Markham's 11,355 residents, with median incomes of about $55,000, are among the most active home improvement markets in the Midwest.
We match you with pros covering all 6 ZIP codes in the Chicago Metro, and each listing shows the registry result we have, with the date we checked.
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FreeLocal signals that shape home addition demand and contractor availability in this market.
Nearby areas: Chicago
Typical Home Addition projects in Markham run $40,000 to $150,000.
2025 Cost vs. Value · East North Central market. Markham benchmarked against regional average.
| Project | Cost | Resale | ROI |
|---|---|---|---|
| Accessory Dwelling Unit | $157,758 | $64,636 | 41% |
| Primary Suite Addition | Midrange | $160,572 | $54,514 | 34% |
| Primary Suite Addition | Upscale | $329,084 | $65,028 | 20% |
This is what we have checked in Markham so far. Every contractor we found is shown here, not ranked.
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Here’s what we’ve checked on Maya Construction Group so far.
Here’s what we’ve checked on Chicago Home ReVision so far.
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Converting an attached garage to living space costs $15,000–$50,000 depending on scope. ROI is 65–80% — better than most additions. But there are real tradeoffs in cold climates and HOA neighborhoods.
Midwest home additions cost $150–$300 per square foot and return 50–65% at resale. Here's which additions pencil out, which don't, and how to decide for your home.
Most homeowners sign contractor contracts they don't fully understand. Here are the 8 clauses that create risk — and the 5 things every legitimate contract must include.
Got a contractor quote in hand but something feels off? Run it through our red flag checker — 10 warning signs sourced from FTC and state contractor board fraud reports — and get an instant verdict.
All home additions require permits for structural, electrical, plumbing, and HVAC work. Permit costs run 0.5–2% of project cost. Here's what gets inspected, how long approval takes, and what happens if you skip it.
Bump-outs cost $5,000–$30,000 and expand a room 2–15 feet without new foundation work. Full additions cost $30,000–$100,000+ and require foundation, framing, and roof extension. Here's how to know which your project actually needs.
