Screen rooms and patio covers sit on a wide cost spectrum—from screening an existing covered porch to building a fully roofed outdoor room with electrical, composite decking, and custom details. Because published national ranges swing dramatically by scope, this Illinois Tri-State guide is variables-first.
Approach for this article: variables-only (local quotes required). Where national explainers publish broad bands, we mention them only as context, not as Mount Vernon or Carmi pricing. TSHR does not invent SE Illinois prices and does not present estimate tables as market data here.
TSHR is a matching service and homeowner media—not a contractor. For structure types and permit framing, see our patio-covers outdoor-living cornerstone and screen-rooms vs. sunrooms piece. Live city context: Mount Vernon, IL hub and Carmi, IL hub. When ready: contractor directory or request a contractor.
Disclosure: All Weather Products, mentioned below, is owned by this site’s publisher. It is listed in our Outdoor Living directory on the same terms as every other business and pays the same advertising and lead rates. This guide is not a recommendation to use them — get multiple written quotes, as with any project.
What these projects can include (define scope first)
Clarify which project you mean—pricing language collapses if you don’t:
| Project type | Typical scope elements |
|---|---|
| Screen existing covered porch/deck | Screen panels/frames, doors, misc. trim; structure already stands |
| Patio cover / solid roof over slab | Posts/footings or ledger, beams, roof panels or shingles, flashing, drainage |
| New screened porch | Foundation or slab, framing, roof, screens, stairs/guards if elevated, possible electric |
| Three-season / four-season room | Windows/insulation, possible HVAC tie-in—often permits like an addition |
Ask every bidder to restate the scope in writing before comparing dollars.
Why this guide is variables-only
National consumer explainers (HomeLight, CostToRenovate, contractor blogs) often cite very wide bands—for example, screening an existing porch is routinely framed as a smaller job than building a new screened porch from the ground up, and published per-square-foot talk swings from modest to high three-figures depending on market and finish, with total project talk ranging from low five figures into much higher luxury territory. Metro-specific contractor blogs (e.g., high-cost East Coast or Chicago markets) publish still higher figures that do not transfer to SE Illinois Tri-State yards. Those national mentions are context only—not Illinois Tri-State estimate tables and not actionable bids.
That spread is a signal: scope definition beats average chasing. Until a contractor walks your Mount Vernon, Carmi, or county lot, treat any national number as non-actionable.
Cost variables that move Illinois Tri-State bids
1. Existing structure vs. new build
Converting an already-permitted, sound covered porch is a different job than pouring a slab, setting footings, framing walls, and tying a new roof into the house.
2. Foundation & frost / soil
Slab-on-grade, pier footings, or a more involved foundation—each responds differently to southern Illinois freeze–thaw and drainage. Confirm footing depth and design with the Illinois AHJ and the contractor’s plan—not a neighbor’s rumor and not an Indiana frost-depth table copied across the river.
3. Roof type & house tie-in
Shed vs. gable, metal panel vs. shingles, ledger attachment vs. freestanding. Improper flashing at the house is a classic leak source. Complexity here often dwarfs screen-mesh price differences.
4. Screen / enclosure system
Fiberglass vs. aluminum vs. pet-resistant mesh; fixed panels vs. premium framed systems; doors and hardware. Motorized or retractable systems are a separate tier.
5. Flooring & railings
Existing concrete, new broom slab, composite decking, stairs, and guardrails (especially when walking surface is elevated—many codes care about height thresholds).
6. Electrical & comfort add-ons
Fans, lighting, outlets, heaters, and future outdoor kitchen rough-ins. Electrical usually means an additional permit/trade.
7. Waterproofing & drainage
Slope away from the foundation, gutter integration, and whether the cover dumps water onto a neighbor line or sidewalk—especially important on lots near mapped flood or drainage easements.
8. Permits, HOA, and floodplain
Roofed and enclosed outdoor structures commonly need building permits in Illinois municipalities.
- City of Mt. Vernon, IL: Engineering & Inspections lists porches and decks that are over 30 inches high or have a roof among common permit triggers (city permits page). That language is highly relevant to patio covers and elevated/roofed outdoor rooms—confirm your exact project with the office before you dig.
- City of Carmi: City reminders have required permits for remodeling that adds porches/decks and related work—re-verify with the City Clerk. Carmi’s municipal code includes Title 12 — Flood Control; floodplain parcels may need extra path steps.
- Floodway work may also need IDNR/OWR authorization under statewide floodway rules—local permit alone is not always enough (IDNR permit programs).
- Check FEMA MSC and Illinois flood maps for Jefferson / White Counties for mapped flood hazard awareness.
9. Access & tear-out
Fence removal, tight side yards, overhead lines, and demolition of an old cover all add labor days—common on older in-town Mount Vernon blocks and farmstead lots alike.
10. Finish level
Builder-basic aluminum screen room vs. custom wood/composite entertainment porch can look similar on a napkin sketch and price nothing alike.
Illinois Tri-State notes (climate & outdoor living)
- Bugs + humidity: Screen rooms earn their keep May–September across southern Illinois.
- Storms: Design for wind uplift; secure furniture; see storm-prep cornerstone. NWS Paducah covers Jefferson and White County warning products.
- Winter: Most screen rooms are not four-season living space unless built and insulated as such—don’t budget for HVAC-conditioned space unless the contract and permit path say so.
- Sequencing: Many homeowners pour a patio first, then add a cover—coordinate footings so you don’t cut a brand-new slab later. See the IL sibling concrete patio cost guide (and the national-estimate Evansville sibling if you are comparing pack structure) plus the patio-covers cornerstone.
When to get multiple quotes
Bring the same packet to 2–3 outdoor-living or remodeling contractors:
- Rough sketch with dimensions and photos
- Goal: shade only / rain / screens / three-season
- Whether electrical is in or out
- HOA rules if any
- Ask each for allowances vs. fixed specs on screens, roofing, and concrete
Use the hire-a-contractor checklist: insurance, written contract, who pulls permits, and payment schedule tied to milestones—not “all cash up front.” Illinois municipal rules vary—do not assume Indiana city registration or Kentucky trade cards apply.
Explore matches via contractor directory or request a contractor. Subscribe for Tri-State outdoor-living and seasonal guides.
Who to use locally
If you’re pricing a screen room or insulated patio cover on the Illinois side of the Tri-State, one local option to put on your shortlist is All Weather Products (AWP)—an Evansville manufacturer that builds custom aluminum screen rooms, three-season sunrooms, and insulated patio covers for Midwest weather. AWP publishes project photos from across the Tri-State, including Illinois work such as a McLeansboro screen room on its public gallery.
Start with AWP’s official site and free-estimate path to discuss scope (enclose an existing porch vs. new roofed structure, insulated cover vs. screen walls, electrical, etc.): allweatherproductsinc.com · Free estimates. Product pages for context: screen rooms · insulated patio covers.
Prefer a neutral matching path instead of (or alongside) a named manufacturer? Browse TSHR’s contractor directory or use request a contractor so we can match your project type without implying a ranked “winner.”
Disclosure: All Weather Products is affiliated with the publisher of Tri-State Homeowner Report. This is not an independent ranking.
Sources
- TSHR patio covers / outdoor living cornerstone (internal cross-reference).
- City of Mt. Vernon — Building Permits (porches/decks over 30″ or with a roof).
- FEMA Flood Map Service Center; FEMA Flood Insurance; Illinois Flood Maps; IDNR NFIP / permit programs.
- City of Carmi — Municipal Code Title 12 Flood Control (AmLegal); City Clerk permit practice (re-verify).
- National consumer explainers reviewed for why bands vary (not used as SE Illinois price tables): HomeLight screened-porch cost article; CostToRenovate screened porch addition cost 2026; related contractor education blogs.
Find a local contractor
Browse outdoor living contractors in the Evansville Tri-State, or tell us what you need and we will hand it to one local contractor in your area. Free to you — contractors pay us, you never do.
Leave a Reply