Home Addition in Frankfort sees strong homeowner demand across the Chicago Metro.
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FreeTypical Range
$40,000 to $150,000
Typical Home Addition projects in Frankfort run $40,000 to $150,000.
Mid-range cost and resale value from the 2025 Remodeling Cost vs. Value report. Frankfort is benchmarked using the East North Central regional average.
| Project | Cost | Resale Value | 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% |
Source: Remodeling Magazine 2025 Cost vs. Value. Mid-range tier.
Frankfort Market
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Nearby areas: Chicago
Before you commit to a kitchen overhaul or deck addition, see exactly what each project returns at resale. Our ROI calculator uses 2025 Cost vs. Value data to show you the numbers in seconds.
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.
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.
Home additions cost $150–$310 per square foot for finished living space, with second-story additions running 25–40% more. Use our estimator to get a realistic budget range before you meet with a general contractor.
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.
