Home › Covered structures › Glen Carbon, IL Serving Glen Carbon & the Metro East

Pergolas & covered patios in Glen Carbon, IL

Threshold Builders designs and builds cedar pergolas, gable-roof covered patios and pavilions for Glen Carbon, IL homeowners. We handle the city permit, engineering, footings below frost depth, the full build, and cleanup - most structures go up in one to two weeks on site.

Get a free itemized quote Call (618) 448-4565

Glen Carbon, IL

Why Glen Carbon homeowners call us

A roof changes how much you use the backyard.

Glen Carbon sits five minutes from our shop, and its mix of new subdivisions and wooded, sloped lots is exactly the kind of terrain we build on every week. A pergola or covered patio roughly doubles the evenings a Glen Carbon backyard actually gets used - shade in July, cover in a pop-up storm, and a defined room that makes furniture, lighting and a fan possible.

We build across all of Glen Carbon - newer subdivisions like Meridian Oaks and Savannah Crossing alongside Old Town streets near Main Street, with plenty of sloped, wooded lots backing to the Heritage Trail. Every structure is engineered to match the house: roof pitch and shingles carried over on covered patios, cedar sized generously on pergolas, posts on concrete footings poured below the Madison County frost line - never deck blocks.

The most requested Glen Carbon build we quote is a gable-roof covered patio with a ceiling fan and lighting, tied visually into the home’s roofline.

Covered structures in Glen Carbon

Every way to put a roof over Glen Carbon outdoor living.

Cedar pergolas

Generously-sized rough-sawn cedar with clean joinery - shade and structure that looks intentional, not kit-built.

Gable & shed-roof covered patios

Real roofs with shingles matched to the house, vented and flashed correctly where they meet the home.

Pavilions

Freestanding rooms in the yard - vaulted ceilings, fans, lighting, and space for a full outdoor kitchen or dining table.

Attached patio covers

Ledger-mounted covers engineered into the home’s structure - not screwed to fascia and hoped for.

Lighting, fans & screens

Wiring runs planned with the structure: dimmable lighting, ceiling fans, and screened openings where bugs are the enemy.

Deck + pergola combinations

Designed as one structure with one crew and one warranty - not a pergola bolted onto a deck later.

Straight numbers

What a covered structure costs in Glen Carbon

Every project gets a free, line-by-line itemized quote - materials, labor, footings, permit, everything visible before anything is signed. As honest ballparks for Glen Carbon:

Cedar pergola$6,000 - $14,000

Attached patio cover$12,000 - $24,000

Gable-roof covered patio$18,000 - $40,000

Freestanding pavilion$25,000 - $60,000

Lighting, fans & screensQuoted with the structure

Ranges reflect typical Glen Carbon projects; size, roof style, and electrical scope move the number. Your itemized quote is exact.

Covered structure questions from Glen Carbon homeowners

Real questions we answer at Glen Carbon walkthroughs.

Do I need a permit for a pergola or covered patio in Glen Carbon, IL?

Yes - covered structures need a building permit from the Village of Glen Carbon, including plan review and inspections. We prepare drawings, submit, and meet the inspector - it’s part of every quote.

How much does a covered patio cost in Glen Carbon?

Most gable-roof covered patios we build in Glen Carbon land between $18,000 and $40,000 depending on size and electrical scope. Cedar pergolas run $6,000 to $14,000, and full pavilions $25,000 to $60,000. Every quote is itemized.

Attached to the house or freestanding - which is right?

Attached covers flow straight off the back door and share the home’s roofline; freestanding pavilions define a separate room deeper in the yard. Lot shape, door height and roof pitch usually make the decision - we walk both options at the free walkthrough.

Will it match my house?

That’s the difference between a structure and a kit. We match roof pitch, carry over shingle color, size posts to the home’s scale, and stain cedar to sit naturally against your siding and trim.

How long does the build take?

Once the permit is approved, most Glen Carbon pergolas go up in under a week and covered patios in one to two weeks. Footings are poured first and inspected before framing - we give you the schedule before we start.

Can you add a roof over my existing patio or deck?

Often, yes. We evaluate whether the existing slab or deck framing can carry the structure - covered patios need real footings, so we core through and pour them properly rather than resting posts on a slab that was never designed for the load.