DuPage and Naperville home inspections cover six core systems: structure and foundation, exterior and roof, electrical, plumbing, HVAC, and interior with insulation. Beyond that standard visual scope, buyers in this region routinely add radon testing, a sewer line scope, mold testing, and a termite/WDI report on the NPMA-33 form. Under Illinois law, every licensed inspector must deliver a written report within 2 business days of completing the inspection. Chicago Home Inspect LLC handles all of this for buyers across DuPage County and Naperville.
At a glance, a standard inspection covers:
- Structural components and foundation
- Exterior: siding, grading, retaining walls, flashing, decks
- Roof, drainage, flashings, chimneys
- Electrical: service panel, branch wiring, grounding, GFCIs
- Plumbing: supply lines, drains, water heater, sump pump
- HVAC: heating and cooling equipment, visible ductwork
- Interior: walls, ceilings, floors, windows, doors, insulation, ventilation
Table of Contents
- What a DuPage and Naperville home inspection actually checks
- Chicago Home Inspect LLC serves DuPage and Naperville buyers
What a DuPage and Naperville home inspection actually checks
Illinois Standards of Practice define the inspection as a visual review of readily accessible systems. No wall openings, no sewer excavation, no invasive probing. That boundary matters here because many DuPage and Naperville homes built in the 1980s and 1990s have finished basements that hide moisture damage, and mature landscaping can conceal foundation drainage problems entirely.
System-by-system, here is what we look at:
| System | Key items checked | Common regional findings |
|---|---|---|
| Structure/Foundation | Framing, foundation type, crawl space or basement | Efflorescence, staining from freeze-thaw cycles |
| Exterior | Siding, grading, retaining walls, flashing, decks | Improper grading directing water toward the foundation |
| Roof & Attic | Covering, flashings, chimneys, drainage, ventilation | Aging shingles; replacement cycle typically in the range of two to three decades |
| Electrical | Panel, branch wiring, grounding, GFCIs, smoke/CO alarms | Older panels, aluminum branch wiring in some homes |
| Plumbing | Supply, drains, water heater, sump pump | Water heaters approaching or beyond their typical mid-life usability period; active sump wear |
| HVAC | Heating and cooling operation, visible flues | Systems approaching typical service lifespans of about a decade or more |
| Interior/Insulation | Walls, floors, windows, doors, attic insulation, ventilation | Air-sealing gaps common in Climate Zone 5 homes |
Because the inspection is visual only, a finished basement can mask chronic moisture that only a sewer scope or targeted moisture test would catch. For homes with older clay sewer laterals, root intrusion is a real risk. Radon is a separate concern: Illinois geology puts much of DuPage County in an elevated zone, and radon testing is one of the highest-value add-ons we recommend. Mold testing and a NPMA-33 termite/WDI report round out the standard add-on set for this market.
How to read the report. Functional defects (a system not performing as intended) are what drive negotiation and budgeting. Cosmetic items are not. Use the report as your maintenance and negotiation roadmap, not a seller punch list.
Pro Tip: Cross-reference every major system’s age against its replacement cycle. A roof at year 22, an HVAC at year 13, and a water heater at year 10 represent near-term capital costs you can price into your offer or request as credits.
Before the inspection, ask your inspector:
- Can I see a sample report?
- Are you IDFPR-licensed and InterNACHI or ASHI certified?
- What is your turnaround time, and what do add-ons (radon, sewer scope) cost?
- Will you walk the roof, or use a drone?
Interior door and hardware issues often show up in reports too. For quick post-inspection replacements, One Day Doors & Closets of Chicagoland handles same-day door work across the suburbs.
Chicago Home Inspect LLC serves DuPage and Naperville buyers
We are licensed and insured under Illinois law, InterNACHI certified, and BBB accredited. Our inspections run 2–4 hours on site, and we deliver written reports within 2 business days, as required by Illinois regulations. We offer the full add-on set this market calls for: radon testing, sewer line inspection, mold testing, and WDI/NPMA-33 reports. Weekends are available, which matters when you are working against a contract deadline.
Want to see exactly what our reports look like before you book? Review our sample inspection report or schedule directly at Chicago Home Inspect LLC.