High (for minor corrections with careful planning and adherence to code; consult professionals for significant grade changes or complex drainage issues).
While yard grading and drainage leveling on a small scale can be a relatively straightforward task, strict adherence to technical codes and principles is essential to prevent adverse effects. The primary complexity lies in ensuring proper slopes, protecting existing infrastructure, and understanding local regulations rather than extensive structural work.
Project Guidelines & Rules
General Site Requirements & Permits
3 Rules
Permit Requirements
IRC R105.1, R105.2 (Permits are often required for significant changes in grade, particularly if they affect drainage patterns or impact existing structures/utilities. Consult your local building department.)
Site Plan & Documentation
IRC R106.1 (A scaled plot plan indicating existing and proposed grades, drainage patterns, and critical setbacks may be required by the local building department.)
Erosion and Sediment Control
DuPage County Stormwater Ordinance (Best management practices must be implemented to prevent soil erosion and sediment discharge during and after construction, especially for significant earth disturbance.)
Grading and Drainage Principles
4 Rules
Foundation Protection & Grade Slope
IRC R401.3 (Grade shall slope a minimum of 6 inches in the first 10 feet away from the foundation. Where space is limited, an approved alternate method of diverting water, such as a swale or drain, may be required.)
Positive Drainage
IRC R401.3 (All lots shall be graded to provide positive drainage away from structures and prevent water accumulation.)
Surface Water Runoff
IRC R401.3 (Surface water shall not be permitted to drain into crawl spaces or basements. Drainage should be directed towards an approved public way, storm sewer, or natural drainage course without adversely affecting adjacent properties.)
Retaining Walls
IRC R404.2 (Retaining walls exceeding 4 feet in height measured from the bottom of the footing to the top of the wall, or retaining walls supporting a surcharge, shall be designed by a registered design professional. All retaining walls must be constructed on a firm bearing stratum and address proper drainage.)
Soil & Compaction
2 Rules
Backfill Around Foundations
IRC R401.3, R403.1.6 (Backfill shall be placed and compacted in a manner that does not damage the foundation and ensures stable support for slabs and other structures. Proper compaction prevents future settlement and grade changes.)
Soil Bearing Capacity
IRC R401.4 (Soils supporting foundations and other critical structures must be stable and capable of bearing the intended loads. Ensure stable, properly compacted soil to prevent future settlement.)
Underground Utilities & Infrastructure
5 Rules
Protection of Existing Utilities
Illinois Common Ground Notice Act (Call JULIE at 811 at least 48 hours prior to any excavation to locate underground utilities. Damage to utilities is prohibited and carries severe penalties.)
Electrical Wiring & Conduits
NEC 300.5 (Minimum cover requirements for direct-buried cables and conduits, protection from physical damage, and proper grounding must be maintained. Refer to NEC Table 300.5 for specific depths based on circuit voltage and location.)
Plumbing (Exterior Drains, Sump Pump Discharges)
Illinois Plumbing Code Section 890.310, 890.1340 (Storm water, subsoil, or clear water waste shall not be discharged into a sanitary sewer. Sump pump discharge must be directed to an approved storm sewer, drainage swale, or other acceptable method without creating a nuisance or adversely affecting adjacent properties. Minimum pipe slopes and depths for drainage lines must be maintained.)
Frost Protection for Buried Pipes
Illinois Plumbing Code Section 890.410 (All water service piping, drainage piping, and any other water-containing pipes exposed to freezing temperatures must be installed below the DuPage County frost depth of 42 inches or otherwise adequately protected from freezing.)
Storm Sewer Connections
DuPage County Stormwater Ordinance / Illinois Plumbing Code (Connections to public storm sewers require specific permits, inspections, and adherence to connection standards and approved materials from the local authority having jurisdiction.)
DuPage County Specifics (Frost Depth)
2 Rules
Frost Depth Protection
IRC R403.1.4.1 (Footings and foundations subject to frost must be protected from freezing. The minimum frost depth in DuPage County is 42 inches below finished grade for foundations and critical drainage components.)
Underground Water and Sewer Lines
Illinois Plumbing Code Section 890.410 (Water service pipes and any buried plumbing lines, including those for outdoor spigots or irrigation, must be installed below the 42-inch frost line or otherwise adequately protected against freezing.)
