Roof Replacement in O'Fallon, MO

What a new roof costs in O'Fallon

Our 2026 Missouri pricing for a 30-year architectural shingle roof is $450-$750 per square (100 sq ft): $5,400-$9,000 for 12 squares, $8,100-$13,500 for 18 and $10,800-$18,000 for 24. Low-pitch roofs land at the low end, steep roofs at the high end. 3-tab starts at $350 per square; clay, metal and slate are custom quotes.

Roofs in O'Fallon: what we look for

O'Fallon has grown quickly, and many homes in its newer subdivisions still have the shingles they were built with. As those roofs age and storms add up, we photograph every slope so you can see whether a repair will carry you or it's time to replace.

Roofs across St. Charles County

St. Charles County has grown fast, so many roofs here were installed around the same time and are reaching the age where wear shows up all at once. After hail, damage often runs across whole neighborhoods, which is why a documented inspection matters before you file a claim or sign a contract.

What's included

One local crew from tear-off to clean-up:

• ✓ Full tear-off down to the deck and a deck inspection
• ✓ Architectural and 3-tab shingles from Owens Corning, CertainTeed, TAMKO and IKO
• ✓ Flashing, vents and drip edge checked and replaced where needed
• ✓ Gutters, siding, soffit and fascia in the same project if you need them
• ✓ Job-site clean-up and a final walk-through with you
• ✓ 10-Year Workmanship Warranty

Local, insured and accountable

A local crew based in Waterloo, IL, serving O'Fallon and the St. Louis area. Fully insured with general liability coverage of $1,000,000 per occurrence and $2,000,000 aggregate, 5.0★ on Google, and our work is backed by a 10-Year Workmanship Warranty.