Home Remodeling Costs in O Fallon, MO
Remodeling costs in O Fallon run about 50% above the Missouri median, based on home values and labor rates across its 2 ZIP codes in Saint Charles County. The ranges below reflect what O Fallon homeowners actually pay, from the cheapest to the priciest part of town.
- Cost index
- 1.50×
- Missouri median
- Median home value
- $388,454
- Zillow ZHVI
- ZIP codes
- 2
- Saint Charles County
- Projects covered
- 10
- cost + ROI data
What Remodeling Projects Cost in O Fallon (2026)
Ranges span O Fallon's least to most expensive ZIPs, including the ±15% contractor variance. ROI is the share of cost typically recouped at resale in your census region.
Cost range
$14,663 - $19,838
Typical
$17,250
Cost range
$22,491 - $30,429
Typical
$26,460
Cost range
$34,425 - $46,575
Typical
$40,500
Cost range
$31,365 - $42,435
Typical
$36,900
Cost range
$5,738 - $7,762
Typical
$6,750
Cost range
$22,459 - $30,386
Typical
$26,423
Cost range
$73,313 - $99,187
Typical
$86,250
Cost range
$22,562 - $30,526
Typical
$26,544
Cost range
$3,003 - $4,062
Typical
$3,533
Cost range
$12,750 - $17,250
Typical
$15,000
| Project | Cost range | Typical | ROI | Details |
|---|---|---|---|---|
| Roofing Replacement | $14,663 - $19,838 | $17,250 | 54/100 | ZIP estimate → |
| Window Replacement | $22,491 - $30,429 | $26,460 | 70/100 | ZIP estimate → |
| Kitchen Remodel | $34,425 - $46,575 | $40,500 | 95/100 | ZIP estimate → |
| Bathroom Remodel | $31,365 - $42,435 | $36,900 | 77/100 | ZIP estimate → |
| Garage Door Replacement | $5,738 - $7,762 | $6,750 | 100/100 | ZIP estimate → |
| Deck Addition | $22,459 - $30,386 | $26,423 | 74/100 | ZIP estimate → |
| Basement Finishing | $73,313 - $99,187 | $86,250 | 74/100 | ZIP estimate → |
| Siding Replacement | $22,562 - $30,526 | $26,544 | 100/100 | ZIP estimate → |
| Entry Door Replacement | $3,003 - $4,062 | $3,533 | 100/100 | ZIP estimate → |
| HVAC Replacement | $12,750 - $17,250 | $15,000 | 63/100 | ZIP estimate → |
Sources: Remodeling Magazine Cost vs. Value, Zillow ZHVI, BLS construction wages. Data updated 2026-05. How we calculate estimates
Roofing Replacement Cost by ZIP Code
Pick a project and the prices below update. Costs vary little across O Fallon. Open your ZIP for the full local breakdown.