The Top 10 Issues Found in Metro Detroit Home Inspections—And How to Address Them

Every market has its quirks, and metro Detroit is no exception. After conducting hundreds of inspections across Oakland, Wayne, and Macomb counties, certain issues show up again and again—especially in homes built before 1990.

If you're planning to sell, knowing what buyers' inspectors are likely to find gives you a strategic advantage. You can address these issues proactively, price accordingly, or at least not be blindsided during negotiations.

Here are the top 10 issues we find in metro Detroit homes—and what sellers should know about each one.

1. Basement Moisture and Water Intrusion

Why It's So Common Here: Metro Detroit sits on clay soil with a high water table. We get heavy spring rains and rapid snowmelt. Add in homes with 50-100 year old foundations, and water intrusion becomes almost inevitable.

What Inspectors Find:

• Water stains on basement walls or floors

• Efflorescence (white mineral deposits)

• Musty odors

• Failed or missing sump pumps

• Inadequate drainage around foundation

• Cracks in foundation walls

How to Address It:

If you have active water problems:

• Install or replace sump pump ($500-1,500)

• Improve grading so water flows away from foundation ($500-2,000)

• Seal minor cracks ($200-500)

• Install or repair gutters and downspouts ($800-2,000)

• Consider interior or exterior waterproofing for serious issues ($3,000-15,000)

If you have old stains but current dryness:

• Document that the issue was fixed

• Show what you did (photos, receipts)

• Run a dehumidifier to keep basement dry

Seller's Reality Check: Buyers expect older Detroit basements to have some history. Current dryness matters more than old stains—but you need to prove it's dry.

2. Aging HVAC Systems

Why It's So Common: Many metro Detroit homes still have original furnaces from the 1990s or early 2000s. Given our brutal winters, these systems work hard, and buyers are hypersensitive to furnace age.

What Inspectors Find:

• Furnaces 15+ years old (typical lifespan: 15-20 years)

• Air conditioners 10+ years old (typical lifespan: 10-15 years)

• Rust or corrosion on heat exchangers

• Poor maintenance history (dirty filters, no service records)

• Inadequate airflow

• Thermostat issues

How to Address It:

If your system is 15+ years old but working:

• Get a pre-listing HVAC inspection ($75-150)

• Service the system (cleaning, new filter, tune-up)

• Provide service records to buyers

• Consider offering a home warranty

• Price with replacement in mind or offer credit

If your system is failing:

• Replace before listing if possible (new furnace: $3,000-6,000; new AC: $2,500-5,000)

• Highlight the new system in your listing as a major selling point

• If you can't afford replacement, disclose the issue and price accordingly

Seller's Reality Check: A new furnace can be a huge selling point in Michigan. It might be worth the investment to attract buyers and avoid negotiation headaches.

3. Roof Issues

Why It's So Common: Michigan weather—ice dams, heavy snow loads, wind, hail—is brutal on roofs. Asphalt shingles typically last 15-25 years here, and many homes are overdue for replacement.

What Inspectors Find:

• Shingles past their expected lifespan

• Curling, cracking, or missing shingles

• Ice dam damage (water stains in attic near roof edges)

• Multiple layers of shingles (code allows max 2 layers)

• Poor attic ventilation

• Granule loss

• Damaged or missing flashing

How to Address It:

If your roof is marginal:

• Get a roofer's assessment ($0-200, many offer free quotes)

• Make necessary repairs ($500-2,000 for partial repairs)

• Document remaining lifespan

If your roof is at end-of-life:

• Replace before listing ($8,000-20,000 depending on size)

• Offer a credit for replacement

• Price the home to account for roof cost

• Get multiple quotes to provide buyers

Seller's Reality Check: A new roof is expensive, but it's also a major selling point. If you can swing it, a new roof often returns 60-70% of its cost in increased sale price and faster closing.

4. Electrical Issues in Older Metro Detroit Homes

Why It's So Common: Homes built before 1970 often have outdated electrical systems that don't meet current needs or safety standards.

What Inspectors Find:

• Knob-and-tube wiring (common in homes built pre-1940)

• Aluminum wiring (1960s-1970s homes)

• Inadequate electrical service (60-100 amp panels in modern homes needing 200 amps)

• Federal Pacific or Zinsco panels (known fire hazards)

• Missing GFCI outlets in bathrooms, kitchens, and garages

• Ungrounded outlets

• Overloaded circuits

• Amateur DIY electrical work

How to Address It:

For safety hazards (knob-and-tube, Federal Pacific panels):

• Budget for full rewiring ($8,000-15,000) or panel replacement ($1,500-3,000)

• This is often non-negotiable for buyers and lenders

For code updates (GFCI outlets, grounding):

• Hire an electrician to upgrade ($500-2,000 depending on scope)

• These are relatively affordable and make buyers comfortable

Seller's Reality Check: Electrical problems scare buyers and lenders. If your inspector flags electrical issues, address them before listing if possible.

5. Plumbing Problems

Why It's So Common: Older homes have older plumbing. Galvanized pipes corrode, polybutylene fails, and fixtures wear out.

What Inspectors Find:

• Galvanized steel pipes (common in pre-1960s homes, prone to corrosion and reduced water pressure)

• Polybutylene pipes (1978-1995, known for failure)

• Leaking fixtures

• Poor water pressure

• Slow drains

• Sump pump issues

• Water heater past lifespan (10-15 years typical)

How to Address It:

If you have polybutylene or galvanized pipes:

• This is a big deal. Consider repiping ($4,000-15,000) or pricing to reflect it

• Some lenders won't approve mortgages with polybutylene

If you have minor leaks:

• Fix them yourself or hire a plumber ($100-500)

If your water heater is old:

• Replace before listing ($800-1,500 for standard tank)

• Highlight "new water heater" in your listing

Seller's Reality Check: Plumbing fixes range from cheap to expensive. Address the small stuff yourself; disclose the big stuff honestly.

6. Insulation and Energy Efficiency Issues

Why It's So Common: Older metro Detroit homes often have inadequate insulation, especially in attics. Energy costs are a concern for buyers, particularly with our heating bills.

What Inspectors Find:

• Insufficient attic insulation (R-38 or less when R-49 is recommended)

• Missing or damaged insulation in walls

• Air leaks around windows and doors

• Old, inefficient windows

How to Address It:

Add attic insulation ($1,500-3,000)

• This is one of the best ROI improvements you can make

Seal air leaks ($200-800)

• Weatherstripping, caulking, and sealing penetrations

Window replacement (if budget allows) ($5,000-15,000)

• New windows are expensive but increase value significantly

Seller's Reality Check: Buyers notice when utility bills are high. Highlighting energy efficiency improvements can justify a higher asking price.

7. Sewer Line Problems

Why It's So Common: Many metro Detroit homes built before 1980 have clay sewer lines. Tree roots love clay pipes, and blockages are common.

What Inspectors Find (if sewer scope is done):

• Root intrusion

• Cracked or collapsed pipes

• Bellied sections (sagging pipes)

• Old, deteriorating clay pipes

How to Address It:

If you've had sewer backups:

• Get a sewer scope inspection

• Address issues before listing

If you haven't had problems:

• Consider a pre-listing sewer scope anyway, especially if your home has mature trees

• Disclose the condition honestly

Seller's Reality Check: Sewer line issues are expensive to fix and a major concern for buyers. Proactive inspection shows you're a serious seller.

8. Wood-Destroying Insects and Rot

Why It's So Common: Michigan's humidity and moisture create perfect conditions for wood rot and insect damage, particularly in basements and crawl spaces.

What Inspectors Find:

• Wood rot in window sills, door frames, or basement framing

• Evidence of termites or carpenter ants

• Moisture damage leading to rot

• Insufficient ventilation in crawl spaces

How to Address It:

For active infestations:

• Hire a pest control company

• Repair damaged wood

For rot issues:

• Replace rotted sills, trim, or framing

• Address moisture source causing rot

Seller's Reality Check: Termite inspections are often required by lenders. Get ahead of it and handle problems before listing.

9. Drainage and Grading Issues

Why It's So Common: Settlement over time, landscaping changes, and improper grading cause water to flow toward foundations instead of away.

What Inspectors Find:

• Ground sloping toward foundation (should slope away)

• Standing water near foundation

• Damaged or missing gutters/downspouts

• Downspouts dumping water right next to foundation

How to Address It:

Re-grade around foundation ($500-2,000)

Install or repair gutters ($800-2,000)

Extend downspouts away from house ($200-500)

Install French drains if needed ($2,000-6,000)

Seller's Reality Check: Poor drainage leads to basement moisture—one of buyers' top concerns. Fixing drainage is often cheaper than you think and prevents expensive problems.

10. Safety Issues (Smoke Detectors, Railings, GFCI Outlets)

Why It's So Common: Older homes don't always meet current safety standards, and homeowners often overlook simple fixes.

What Inspectors Find:

• Missing or non-functional smoke detectors

• Missing carbon monoxide detectors

• Handrails missing from stairs

• Guardrails too short or improperly spaced

• Missing GFCI protection in wet locations

• Tripping hazards

How to Address It:

All of these are cheap and easy to fix:

• Install smoke/CO detectors ($20-50 each)

• Add GFCI outlets ($15 each + electrician fee if needed)

• Install handrails ($100-400)

• Fix tripping hazards (varies)

Seller's Reality Check: Don't lose a buyer over a $50 smoke detector. These are no-brainers to fix before listing.

The Inspection-Ready Home Checklist

Before listing your metro Detroit home, address these items yourself:

✓ Basement: Confirm it's dry, fix any moisture issues, run dehumidifier

✓ HVAC: Service furnace/AC, replace filters, provide maintenance records

✓ Roof: Get assessment, make repairs, document condition

✓ Electrical: Update outlets to GFCI where needed, replace old panels if possible

✓ Plumbing: Fix leaks, replace aging water heater

✓ Insulation: Add attic insulation, seal air leaks

✓ Sewer: Consider scope inspection if home is 40+ years old

✓ Drainage: Ensure grading slopes away, gutters function properly

✓ Safety: Install smoke/CO detectors, add railings where missing

The Bottom Line

Metro Detroit homes have predictable issues based on age, climate, and construction methods. Smart sellers address these proactively—either by making repairs, offering credits, or pricing accordingly.

The worst strategy? Ignoring problems and hoping buyers won't notice. They will. And it'll cost you more in negotiations than it would have to fix upfront.

Ready to get ahead of the inspection? HHI Services offers pre-listing inspections that identify exactly what buyers' inspectors will find—so you can plan accordingly. Schedule your inspection or call Erik at 248-388-4783.