Sunrooms Cost in Illinois in 2026
Most Sunrooms projects in Illinois cost between $26,000 and $97,000. The typical price is $54,000.
Labour and materials in Illinois run about 12% above the national average. These figures are adjusted for that, so they are not the national average you will find elsewhere.
What drives the price
- Three-season versus fully conditioned four-season
- Foundation type — slab, piers or existing deck
- Glazing performance
- Whether HVAC is extended into the space
Usually included
- Foundation and framing
- Glazing and roof panels
- Electrical rough-in and finish
Usually extra
- HVAC extension
- Permits
- Interior finishes beyond basic
Unit prices in Illinois
| Quality tier | Cost per sq ft |
|---|---|
| Budget | $130 |
| Mid-range | $270 |
| High-end | $485 |