Home Inspection Checklist: The Complete Guide for Inspectors

A thorough, systematic checklist is the backbone of every professional home inspection. This guide provides a comprehensive system-by-system checklist based on InterNACHI and ASHI Standards of Practice, along with expert tips on items even experienced inspectors miss and how digital tools can transform your workflow.

Why a Comprehensive Checklist Matters

A professional home inspection checklist is not just a convenience — it is your quality control system. A typical residential inspection covers 400 to 1,600+ individual items depending on the property's size, age, and complexity. Without a structured checklist, it is easy to miss items, skip sections, or produce inconsistent reports from one inspection to the next.

A well-designed checklist serves three critical purposes:

Ensures completeness — Every required system and component gets evaluated, every time
Protects against liability — Documented proof that you followed your Standards of Practice
Improves efficiency — A systematic approach reduces on-site time and post-inspection report writing

Both InterNACHI and ASHI Standards of Practice define the minimum requirements for a residential home inspection. The checklist below meets and exceeds both standards.

The 10 Major Systems Every Home Inspection Must Cover

1. Structural / Foundation

The structural system is the skeleton of the house. Deficiencies here are among the most expensive to repair and the most consequential to miss.

Checklist items:

Foundation type identified (slab, crawlspace, basement, pier-and-beam)
Foundation walls inspected for cracks, bowing, displacement, and water stains
Floor structure visible — joists, beams, subflooring condition
Load-bearing walls, columns, and headers visible and evaluated
Signs of settlement — uneven floors, diagonal cracks above windows/doors
Evidence of water penetration or moisture damage
Grading slopes away from foundation (minimum 6 inches in first 10 feet)
Evidence of previous structural repairs documented

2. Roof System

Roof deficiencies are the number one source of insurance claims on residential properties. A thorough roof evaluation is essential.

Checklist items:

Roof covering material identified (asphalt, metal, tile, slate, membrane)
Estimated age and condition of roof covering
Shingles inspected for curling, cracking, missing, or granule loss
Flashing at chimneys, walls, valleys, skylights, and penetrations
Gutters and downspouts — condition, attachment, proper drainage
Soffit, fascia, and rake boards
Roof ventilation — ridge vents, soffit vents, attic fans
Evidence of active or prior leaking
Skylight condition and seals
Chimney cap, crown, and flashing condition

3. Exterior

The exterior is your first opportunity to identify issues that may affect the entire structure, particularly water management.

Checklist items:

Siding/cladding material and condition (vinyl, wood, fiber cement, brick, stucco)
Trim, fascia, and soffits
Exterior doors — operation, weatherstripping, thresholds
Windows — seals, operation, signs of failure
Decks, porches, patios — structural integrity, ledger board, railing height (min. 36 inches)
Walkways and driveways — condition, trip hazards
Retaining walls
Vegetation clearance from structure (12+ inches recommended)
Exterior electrical outlets — GFCI protection
Hose bibs — function and anti-siphon devices

4. Electrical System

Electrical deficiencies are safety hazards and among the most commonly cited items in inspection reports.

Checklist items:

Service entrance, mast, and drip loop
Main panel — brand, amperage (100A, 150A, 200A), condition
Breakers — proper sizing, no double-tapped connections, no overheating evidence
Branch circuit wiring type identified (copper, aluminum, knob-and-tube)
Grounding and bonding — water pipes, gas pipes, grounding electrode
GFCI protection in kitchens, bathrooms, garages, exteriors, laundry, unfinished basements
AFCI protection in bedrooms (and living areas in newer homes)
Smoke detectors and CO detectors — present and functional
Representative switches, fixtures, and receptacles tested
Junction box covers present
Subpanels — neutral and ground properly separated
Known hazards flagged: Federal Pacific, Zinsco, aluminum branch wiring, knob-and-tube

5. Plumbing System

Plumbing issues range from minor nuisances to major water damage risks. Thorough evaluation of both supply and drain systems is essential.

Checklist items:

Water supply pipe material identified (copper, PEX, CPVC, galvanized, polybutylene)
Main water shut-off location identified and operational
Water heater — type, capacity, age, condition
Water heater TPR valve and discharge pipe — proper termination
Water pressure tested (normal range: 40–80 PSI)
Drain, waste, and vent piping material identified
Functional flow tested at representative fixtures
Toilets — mounting, flush, no base leaks
Sinks, tubs, showers — drainage and leaks
Visible supply and drain leaks throughout
Sump pump tested (if present)
Fuel storage and gas distribution systems
Known hazards flagged: polybutylene piping, lead solder (pre-1986)

6. HVAC (Heating, Ventilation, and Air Conditioning)

HVAC systems are expensive to repair or replace. Documenting the age, condition, and performance of these systems is critical.

Checklist items:

Heating system type identified (forced air, boiler, heat pump, baseboard, radiant)
Fuel source identified (gas, electric, oil, propane)
Equipment age, make, model, and capacity (BTU)
Thermostat operation verified
Air filter condition and size documented
Ductwork — visible condition, insulation, connections
Cooling system type and capacity (tonnage)
Refrigerant line insulation
Condensate drain and pump
Temperature differential tested (cooling: 15–20°F; heating: 40–70°F rise)
Flue/vent connector — slope, material, clearances
Combustion air supply adequate

7. Interior

The interior inspection covers the livable spaces and identifies both safety hazards and general condition issues.

Checklist items:

Walls, ceilings, floors — cracks, stains, levelness, material condition
Windows — operation, locks, seals, evidence of failed insulated glass
Interior doors — operation and hardware
Stairs, handrails, guardrails — rise/run consistency, graspable rails, proper height
Countertops and cabinets — condition and function
Garage vehicle door — manual and automatic operation
Garage auto-reverse safety test
Garage fire separation — drywall condition on shared walls
Garage-to-house door — fire rated, self-closing

8. Insulation and Ventilation

Poor insulation and ventilation lead to energy loss, moisture problems, and mold growth.

Checklist items:

Attic insulation type and approximate depth/R-value
Attic ventilation type and adequacy (1:150 ratio or 1:300 with vapor barrier)
Vapor barrier in crawlspace (6-mil poly minimum)
Bathroom exhaust fans — present, functional, vented to exterior (not attic)
Kitchen exhaust — present and functional
Dryer vent — material (rigid metal preferred), termination to exterior

9. Fireplaces and Chimneys

When present, fireplaces require specific evaluation for both functionality and fire safety.

Checklist items:

Fireplace type identified (masonry, factory-built, gas insert)
Firebox condition — firebrick, mortar joints
Damper operation
Hearth extension adequate (min. 16 inches front, 8 inches sides)
Chimney — visible condition, cap, spark arrestor, crown
Gas fireplace safety controls and venting

10. Appliances

Built-in appliances are commonly tested during a standard home inspection.

Checklist items:

Dishwasher — operation, leaks, high loop or air gap on drain
Garbage disposal — operation
Range/oven — operation, anti-tip bracket present
Range hood — operation, vented or recirculating
Built-in microwave — operation
Laundry connections — hot/cold supply, drainage, 240V outlet

15 Items Even Experienced Inspectors Miss

Even seasoned inspectors can overlook these commonly missed items. Use this list to double-check your thoroughness.

Grading and drainage — Improper slope toward the foundation is the number one source of water intrusion. Check that soil slopes at least 6 inches away from the foundation in the first 10 feet.
Anti-tip bracket on free-standing ranges — Required by manufacturers since 1991 but missing in an estimated 80%+ of homes. Pull the range forward slightly to check.
Dishwasher drain high loop — The drain hose must have a high loop under the countertop or an air gap to prevent backflow contamination.
Water heater TPR discharge pipe — Must terminate within 6 inches of the floor or exterior grade, cannot be reduced in size, and cannot have a valve installed.
Subpanel grounding — In subpanels, the neutral and ground buses must be separated. This is one of the most commonly missed electrical deficiencies.
Bathroom exhaust fan termination — Test the fan, but also verify where it terminates. Fans venting into the attic instead of to the exterior cause significant moisture damage.
Garage fire separation — Check for gaps, penetrations, or missing fire caulking in the drywall on shared garage-to-house walls.
GFCI protection in all required locations — Commonly missed in unfinished basements, crawlspaces with equipment, and exterior receptacles on the back of the house.
Window well egress requirements — Basement bedrooms require egress windows with minimum 5.7 sq ft opening area and maximum 44-inch sill height.
Dryer vent material — Flexible vinyl or foil duct is a fire hazard. Only rigid or semi-rigid metal duct is acceptable. Check the full run, not just the exterior termination.
Double-tapped breakers — Two wires on a single breaker terminal not rated for double taps. Easily missed in crowded panels.
Flashing at roof-to-wall transitions — Missing step flashing and kick-out flashing at these intersections is a leading cause of concealed water damage.
Crawlspace vapor barriers — Missing, torn, or improperly overlapped barriers. Many inspectors enter crawlspaces but do not thoroughly evaluate the vapor barrier.
Soil settlement against foundation — Negative grading where soil has settled over time, often obscured by mulch or landscaping.
Combustion air for gas appliances — Gas furnaces, water heaters, and fireplaces need adequate air supply for safe combustion. Verify that combustion air openings are present and unobstructed.

Residential vs. Commercial Inspection Checklists

While most inspectors start with residential inspections, commercial property condition assessments (PCAs) represent a higher-value market segment.

Aspect	Residential	Commercial
Standard	InterNACHI/ASHI SOP	ASTM E2018
Duration	2–4 hours on-site	1–5 days depending on size
Report length	25–60 pages	50–200+ pages
Price range	$300–$600	$2,000–$15,000+
Additional systems	Smoke/CO detectors, basic fire separation	Fire suppression, elevators, ADA compliance, BAS controls
Environmental	Usually excluded	Phase I ESA often required alongside

Commercial inspections require specialized knowledge and more complex checklists, but they offer significantly higher per-inspection revenue. If you plan to grow your business into commercial work, choose inspection software that supports customizable templates for both residential and commercial workflows.

Digital Checklists vs. Paper: Why Software Wins

The shift from paper to digital inspection checklists has transformed the industry. Here is how they compare:

Paper Checklist Drawbacks

Time-consuming on-site and during report transcription
Prone to illegible handwriting and transcription errors
No photo integration — photos must be separately organized
Difficult to maintain consistency across multiple inspectors
Average report production time: 4–8 hours (on-site + office)

Digital Checklist Advantages

Speed: Complete and deliver reports same-day, often within 1–2 hours post-inspection
Consistency: Templates ensure no items are skipped
Photo integration: Annotate photos with arrows and text directly from your phone
AI assistance: Auto-generate professional finding descriptions
Offline capability: Works in basements and rural areas with no connectivity
Instant delivery: Email reports directly to clients and agents
Business tools: Scheduling, payments, and agreements integrated
Legal protection: Timestamped records with photo metadata

Approximately 85–90% of professional inspectors now use digital reporting software. The remaining paper-based inspectors are typically low-volume or nearing retirement.

Seasonal Inspection Considerations

The time of year affects what you can inspect and what issues are most visible.

Spring

Winter roof damage is visible — check for missing shingles and ice dam evidence
Spring thaw reveals foundation water intrusion
Saturated soil makes drainage assessment easier
Test AC if outdoor temperatures exceed 60°F

Summer

Peak cooling season — ideal for evaluating AC performance
Extreme attic temperatures reveal ventilation adequacy
Best conditions for exterior evaluation (paint, siding, caulk)
Heating system may be difficult to test in extreme heat

Fall

Test heating systems before winter
Inspect chimney and fireplace before heating season
Evaluate weatherstripping and insulation before cold weather
AC testing limited once temperatures drop below 60°F

Winter

Peak heating season — best for furnace/boiler evaluation
Ice dams indicate insulation and ventilation deficiencies
Snow and ice may limit roof access — document as limitation
Check for frozen pipe risk on exposed pipes in attics and crawlspaces

Always document what could not be inspected and why. Seasonal limitations are normal, but they must be recorded in your report for legal protection.

How InspectForge Makes Your Checklist Digital

InspectForge is built to turn your inspection checklist into a streamlined digital workflow:

Customizable templates — Build checklists that match your specific workflow and state requirements, or let the MI6 AI assistant generate a complete template from a description
Mobile apps for iOS and Android — Complete your entire inspection on your phone or tablet
Offline mode — Full functionality in basements, crawlspaces, and rural areas with no connectivity
Photo annotation — Mark up photos with arrows, circles, and text directly in the app
AI-powered descriptions — MI6 generates professional finding narratives so you spend less time typing
Integrated scheduling and payments — Manage your calendar and collect fees in the same platform
Digital agreements — Get pre-inspection agreements signed via e-signature before you arrive

Learn more about InspectForge's features in our documentation or start your 14-day free trial — no credit card required.

Conclusion

A comprehensive home inspection checklist is the foundation of professional, consistent, and defensible inspections. By covering all 10 major systems, watching for the commonly missed items, and using digital tools to enforce completeness, you can deliver reports that protect your clients, build your reputation, and grow your business.

The best checklist is one that works with you — on your mobile device, in the field, whether you have internet access or not. Invest in tools that make your checklist a workflow, not just a piece of paper.

This guide was last updated in February 2026. For the complete InterNACHI Standards of Practice, visit nachi.org/sop.htm. For ASHI Standards, visit homeinspector.org.