Sunroom Addition Contractor in O'Fallon, IL
O'Fallon is one of the fastest-growing communities in St. Clair County, and homeowners here are investing in sunroom additions that extend comfortable living space year-round. Whether your home is in an established neighborhood off Milburn School Road or a newer development near Scott Air Force Base, All-Pro designs sunrooms that complement your architecture and stand up to Illinois's four demanding seasons.
Owner Bill Sessions personally handles every estimate and is on every job. You get clear communication, a written estimate, and workmanship that holds up through Illinois winters. That's why homeowners in O'Fallon keep calling All-Pro back.
Our Sunroom Addition Services in O'Fallon
- Custom three-season and four-season sunroom design and build
- Fully insulated sunrooms engineered for year-round Illinois use
- HVAC integration — heating and cooling built into every four-season room
- Energy-efficient windows, sliding doors, and skylights
- Tile, hardwood, and LVP flooring options for sunroom interiors
- Full permit pulling, inspections, and end-to-end project management
Why O'Fallon Homeowners Choose All-Pro
- ✓ 23 years serving Metro East Illinois
- ✓ Licensed & insured — IL contractor
- ✓ 4.7 stars · 40 verified reviews
- ✓ Owner Bill Sessions on every job
- ✓ Free written estimates — no pressure
We also serve nearby cities including Swansea, Shiloh, and Belleville. Call us for any sunroom addition project in the 60-mile Metro East radius.
Get Your Free O'Fallon Estimate →