Feasible for highly experienced DIYers with a comprehensive understanding of structural engineering, electrical systems, and plumbing. Professional design and licensed contractor involvement are strongly recommended for structural integrity, electrical safety, and all plumbing installations to ensure compliance with DuPage County and state codes.
Construction of a covered pavilion, an accessory structure, involves significant structural design to account for DuPage County's specific frost depth, snow loads, and wind loads. Electrical and potential plumbing installations add layers of complexity requiring adherence to specific code provisions. While not a primary dwelling, proper engineering principles and strict code compliance are essential.
Project Guidelines & Rules
Administrative & Permitting Requirements
6 Rules
Permit Application & Plan Submittal
Your local municipality building department
Required Plan Documents (Site Plan, Foundation Plan, Framing Plan, Elevations)
DuPage County Administrative Requirements; 2024 IRC Appendix A
Plan Review & Approval
Your local municipality building department
Required Inspections (e.g., Footing, Framing, Electrical Rough, Plumbing Rough, Final)
2024 IRC R109; Your local municipality building department
Zoning Compliance (Setbacks, Lot Coverage, Height)
Your local municipality zoning ordinance
Erosion and Sediment Control
DuPage County Stormwater Management Ordinance
Foundations & Footings
6 Rules
Minimum Frost Depth
42 inches below finished grade (DuPage County Standard)
Footing Dimensions and Design
2024 IRC R403.1 (Based on soil bearing capacity and design loads)
Concrete Strength for Footings and Slabs
2024 IRC R402.2 (Minimum 2,500 psi at 28 days for footings; 3,000 psi recommended for exterior exposed concrete in DuPage climate)
Anchor Bolts to Secure Structure to Foundation
2024 IRC R403.1.6 (1/2" diameter, 7" embedment, 6' maximum spacing, within 12" of corners)
Protection of Wood in Contact with Soil or Concrete
2024 IRC R317.1 (Preservative-treated wood required)
Surface Drainage Away from Foundation
2024 IRC R401.3 (Minimum 6" drop in 10' away from foundation)
Structural Framing
7 Rules
Lumber Quality and Grade Marks
2024 IRC R602.1
Design Loads for DuPage County (Snow Load, Wind Load)
2024 IRC R301.2.1 (Ground Snow Load: Min. 30 psf; Roof Live Load: Min. 20 psf; Wind Speed: Risk Category I, Exposure B/C, Basic Wind Speed 115 mph per ASCE 7-16)
Post and Column Sizing (Bearing Capacity and Lateral Support)
2024 IRC R602.8, R602.8.1 (Based on design loads or engineered design)
Beam and Girder Sizing (Span Tables or Engineered Design)
2024 IRC R502.2 (Based on design loads)
Fastening Schedule for All Structural Connections
2024 IRC R602.3
Lateral Bracing for Stability Against Wind Loads
2024 IRC R602.10 (Where applicable)
Protection of Exterior Wood Framing Against Decay
2024 IRC R317.1 (Where exposed to weather or ground contact)
Roofing & Exterior
7 Rules
Roof Sheathing (Minimum Thickness and Span Rating)
2024 IRC R803 (e.g., 7/16" OSB or 15/32" plywood)
Roof Underlayment Application
2024 IRC R905.1.1
Ice Barrier Requirement (DuPage County Climate)
2024 IRC R905.1.2 (Required at eaves, extending minimum 24" inside the exterior wall line)
Roof Covering Installation (e.g., Asphalt Shingles)
2024 IRC R905.2 (Application, fastening, flashing requirements)
Roof Ventilation (Attic Space)
2024 IRC R806 (Minimum 1/150 of the attic floor area, or 1/300 with specific conditions)
Flashing at Roof Penetrations, Valleys, and Wall Intersections
2024 IRC R905.2.8, R703.8
Gutters and Downspouts for Water Management
2024 IRC R903.4 (Discharge away from foundation)
Electrical Systems
9 Rules
Electrical Permit and Required Inspections
Your local municipality electrical department
Service Disconnect for Separate Structures
2023 NEC 225.32
Grounding and Bonding of Electrical System
2023 NEC Article 250
Overcurrent Protection for Conductors and Equipment
2023 NEC Article 240
GFCI Protection for All Outdoor and Wet Location Receptacles
2023 NEC 210.8(A)(3), 210.8(B), 210.8(F)
Wiring Methods and Conductor Protection (Suitable for Damp/Wet Locations)
2023 NEC Article 300
Underground Wiring Depth Requirements
2023 NEC 300.5
Receptacles and Lighting Fixtures Listed for Outdoor/Wet Locations
2023 NEC 406.9 (Weather-resistant receptacles), 410.10(A) (Wet-location luminaires)
Protection of Exposed Conductors or Cables
2023 NEC 300.3(A) (Required to be in raceways, cable assemblies, or be otherwise protected)
Plumbing Systems (Conditional)
6 Rules
Plumbing Permit and Required Inspections (If fixtures are installed)
Your local municipality plumbing department
Water Service and Distribution Piping (Sizing, Material, Protection)
Illinois Plumbing Code 890.1110, 890.1210 (Including protection from freezing in DuPage County)
Backflow Prevention for Outdoor Hose Bibbs and Other Connections
Illinois Plumbing Code 890.1130 (Including non-freeze type for DuPage climate)
Drainage, Waste, and Vent (DWV) System (Sizing, Grade, Cleanouts, Venting)
Illinois Plumbing Code Article 7, 9, 10
Fixture Requirements and Installation
Illinois Plumbing Code Article 4
Winterization Provisions (For seasonal use in DuPage climate)
Illinois Plumbing Code (Consideration for drainable systems or heat tracing)
General Safety & Fire Protection
4 Rules
Guardrails for Elevated Portions (Over 30 inches above grade)
2024 IRC R312.1
Stairs and Handrails (If elevated and requires stairs)
2024 IRC R311.7
Carbon Monoxide Alarms (If fuel-fired appliances are present in an enclosed space)
2024 IRC R315 (Conditional, typically for enclosed/conditioned spaces)
Fire Separation (If within specific distance to main dwelling or property line)
2024 IRC R302
