A home inspection is the best $400–600 you’ll spend in the home-buying process. It uncovers problems that aren’t visible during a showing — foundation cracks behind drywall, knob-and-tube wiring in the attic, water damage under bathroom tiles — and gives you leverage to negotiate the price or walk away before you’re committed. In competitive markets, some buyers waive the inspection condition, which is risky: a pre-offer inspection (done before submitting your bid) lets you strengthen your offer while still knowing what you’re buying. Never buy a home without understanding its condition.
What a Home Inspector Checks
| System | What’s Inspected | Common Issues Found |
|---|---|---|
| Roof | Shingles, flashing, vents, gutters, chimneys | Missing/damaged shingles, leaks, poor flashing |
| Exterior | Siding, windows, doors, grading, foundation visible | Cracks, rot, poor drainage, missing caulking |
| Foundation | Cracks, moisture, structural integrity | Hairline vs structural cracks, water intrusion |
| Plumbing | Pipes, fixtures, water heater, water pressure | Lead pipes, low pressure, leaks, old water heater |
| Electrical | Panel, wiring, outlets, GFCI, smoke detectors | Knob-and-tube, aluminum wiring, overloaded panel |
| HVAC | Furnace, AC, ductwork, ventilation | Old furnace, poor efficiency, blocked ducts |
| Attic | Insulation, ventilation, structure, moisture | Insufficient insulation, poor ventilation, mold |
| Basement | Foundation walls, moisture, sump pump, floor | Water stains, efflorescence, cracks, mold |
| Interior | Walls, ceilings, floors, stairs, railings | Cracks (cosmetic vs structural), uneven floors |
| Kitchen/bath | Fixtures, ventilation, moisture | Poor ventilation, water damage under sinks |
| Garage | Structure, door operation, firewall | Missing firewall between garage and house |
Home Inspection Costs by Property Type
| Property Type | Price Range | Duration |
|---|---|---|
| Condo (apartment) | $250–$400 | 1–2 hours |
| Townhouse | $350–$500 | 2–3 hours |
| Semi-detached | $400–$550 | 2–3 hours |
| Detached house (under 2,000 sq ft) | $400–$600 | 2.5–4 hours |
| Detached house (2,000–3,500 sq ft) | $500–$700 | 3–4 hours |
| Large house (3,500+ sq ft) | $600–$900+ | 4–5 hours |
| Older home (50+ years) | $500–$800 | 3–5 hours |
| Rural property with well/septic | $600–$1,000+ | 3–5 hours |
Additional Specialized Inspections
| Inspection | Cost | When Needed |
|---|---|---|
| Radon testing | $150–$300 | All properties (radon is common in Canada) |
| Mold inspection | $300–$600 | Visible mold, musty smell, water damage history |
| Asbestos testing | $200–$500 | Homes built before 1985 (in insulation, tiles, siding) |
| WETT inspection (wood-burning) | $200–$350 | Fireplaces, wood stoves, pellet stoves |
| Sewer line camera inspection | $250–$500 | Older homes (50+ years), mature trees near sewer |
| Well water testing | $100–$300 | Rural properties with private wells |
| Septic system inspection | $300–$600 | Rural properties with septic tanks |
| Oil tank search (underground) | $200–$400 | Older properties that may have had oil heating |
| Thermal imaging | $150–$300 (add-on) | Detect insulation gaps, moisture behind walls |
| Pool/hot tub inspection | $150–$300 | Properties with pools |
Major Red Flags That May Mean Walk Away
The table below lists the issues that should give you serious pause. Structural foundation cracks, active mold, knob-and-tube or aluminum wiring, and buried oil tanks are the most expensive problems to remediate and the hardest to fully resolve. A $20,000 price reduction doesn’t help if the underlying issue costs $50,000 to fix properly. Your inspector can’t see behind every wall, but a thorough inspection catches the warning signs. If multiple red flags appear in the same property, walking away is almost always the right call.
| Issue | Estimated Repair Cost | Why It’s Serious |
|---|---|---|
| Structural foundation cracks | $10,000–$50,000+ | Compromises entire building |
| Active mold (large area) | $5,000–$30,000 | Health risk, indicates moisture problem |
| Knob-and-tube wiring (full house) | $8,000–$20,000 | Fire risk, insurance issues |
| Aluminum wiring | $5,000–$15,000 | Fire risk, insurance issues |
| Roof needs full replacement | $8,000–$25,000 | If not reflected in price |
| Water in basement (chronic) | $10,000–$30,000+ | Indicates foundation/drainage issues |
| Buried oil tank | $10,000–$50,000+ (remediation) | Environmental liability |
| Asbestos throughout | $10,000–$50,000+ | Removal is expensive and hazardous |
| Federal panel (Zinsco, Federal Pacific) | $3,000–$5,000 | Known fire hazard |
| Major plumbing failures (polybutylene) | $10,000–$30,000 | Pipes prone to failure |
Issues That Are Negotiable
| Issue | Typical Cost | Negotiation Approach |
|---|---|---|
| Roof with 3–5 years remaining | $8,000–$20,000 | Ask for price reduction or credit |
| Aging furnace (15+ years) | $3,000–$6,000 | Request credit for replacement |
| Old water heater (10+ years) | $1,500–$3,000 | Include in negotiation |
| Minor electrical updates | $1,000–$3,000 | Request seller fix before closing |
| Grading/drainage issues | $2,000–$5,000 | Price reduction |
| Bathroom/kitchen exhaust venting wrong | $500–$2,000 | Seller fix or credit |
| Missing GFCI outlets | $500–$1,500 | Seller fix |
| Minor foundation hairline cracks | Monitor (not urgent) | May not warrant negotiation |
Pre-Offer vs Post-Offer Inspection
| Feature | Post-Offer (Traditional) | Pre-Offer Inspection |
|---|---|---|
| When | After accepted offer, during condition period | Before submitting offer |
| Cost | Standard ($400–$600) | Standard ($400–$600) |
| Risk | Low — you can walk away | You pay even if you don’t win the bid |
| Offer strength | Weaker (conditional on inspection) | Stronger (can waive condition) |
| Best for | Buyer’s market (normal conditions) | Hot market (bidding wars) |
| Downside | May lose property if outbid on conditions | Pay $400–$600 with no guarantee |
Home Inspection Checklist (What to Ask About)
| Category | Questions to Ask |
|---|---|
| Roof | How old? How many layers? Any leaks or repairs? |
| Foundation | Any cracks? Evidence of moisture? Is it level? |
| Electrical | What type of wiring? Panel size (100 vs 200 amp)? |
| Plumbing | Pipe material (copper, PEX, galvanized)? Water heater age? |
| HVAC | Furnace and AC age? Last serviced? Ductwork condition? |
| Insulation | Attic insulation R-value? Basement insulated? |
| Moisture | Any signs of current or past water damage? |
| Safety | Smoke detectors, CO detectors, GFCI outlets? |
| Exterior | Grading slope away from house? Drainage issues? |
| Estimate | What are the top 3 most expensive issues? |
How to Choose a Home Inspector
| Criteria | What to Look For |
|---|---|
| Certification | Member of a provincial inspector association |
| Experience | 500+ inspections, ideally construction background |
| Insurance | Errors and omissions (E&O) insurance |
| Sample report | Detailed with photos, not just a checklist |
| Duration | Minimum 2–3 hours for a house |
| You can attend | Inspector who encourages you to be present and ask questions |
| References | Check Google reviews, ask your real estate agent |
The Bottom Line
Never skip a home inspection — $400–600 can save you $10,000–100,000 in hidden problems. In a bidding war, do a pre-offer inspection instead of waiving the condition entirely. Attend the inspection in person, ask questions, and focus on structural, electrical, and plumbing issues over cosmetics.
Related Articles
- Complete Guide to Buying Your First Home
- Closing Costs Calculator
- Condo vs House in Canada
- Conditional vs Firm Offer
- Buying a Home in a Bidding War
- Best Home Insurance Canada — Get quotes before closing day
- Title Insurance Canada — Protection against title defects and fraud