Sunrooms Cost in Saint Charles, MO in 2026
Most Sunrooms projects in Saint Charles, MO cost between $24,000 and $90,000. The typical price is $50,000.
Saint Charles prices track the national average closely. Costs here are close enough to the national picture that the adjustment barely moves the number.
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 Saint Charles, MO
| Quality tier | Cost per sq ft |
|---|---|
| Budget | $120 |
| Mid-range | $250 |
| High-end | $450 |
Sunroom builders in Saint Charles, MO
Businesses listed on Google near Saint Charles, MO. We are not affiliated with them and do not vet them — always confirm licensing and insurance before hiring.
Patriot Builds Sunrooms
4.6(294 reviews)
811 S Kirkwood Rd, Kirkwood, MO 63122
Jacob Sunrooms, Exteriors & Baths
4.8(110 reviews)
1707 Gilsinn Ln, Fenton, MO 63026
R&R Remodeling
4.7(36 reviews)
3110 Lumina Pkwy, St Charles, MO 63301
Highland Decks & Construction LLC
4.9(24 reviews)
67 Susan Dr, St Charles, MO 63301
Rosewood Building Group
4.8(24 reviews)
910 1st Capitol Dr, St Charles, MO 63301
Patio Enclosures Sunrooms
3.5(32 reviews)
11997 Borman Dr, St. Louis, MO 63146