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Created on May 30, 2025

Hazi Admin

When planning a renovation, most homeowners focus on design ideas and material choices. But what you don’t see—the hidden issues behind walls or under floors—can impact your project just as much.

At Hazi Builders, we’ve walked into hundreds of homes in Chicago where these red flags were hiding in plain sight. Knowing what to look for can help you budget more accurately, choose the right scope, and avoid costly surprises mid-project.

1. 

Cracks in the Foundation or Walls

Minor hairline cracks in plaster or drywall are often cosmetic. But stair-step cracks in brickwork, diagonal cracks near windows, or gaps in the foundation can indicate structural movement or settling.

⚠️ Red flag: If the floor isn’t level or doors don’t close properly, you may be dealing with structural shifting—and that’s not a cosmetic fix.

Reference: Bob Vila on Wall Cracks

2. 

Outdated Electrical or Plumbing Systems

Knob-and-tube wiring. Galvanized plumbing. Fuse boxes instead of circuit breakers. These systems might still function—but they’re outdated, inefficient, and potentially unsafe.

⚠️ Red flag: If your home hasn’t been updated in 30+ years, assume major systems may need to be replaced—not just patched.

Reference: National Association of Home Builders: Life Expectancy of Home Components

3. 

Moisture or Water Damage

Water stains, bubbling paint, musty smells, or sagging drywall can all point to leaks—from the roof, plumbing, or basement. Ignoring water issues can lead to mold, rot, and structural damage.

⚠️ Red flag: If you see staining on ceilings or basement walls, investigate further before you open up the walls during construction.

Reference: This Old House: How to Spot Water Damage

4. 

Poor Past Renovations or DIY Work

Quick flips or un-permitted work may leave hidden problems behind—like framing shortcuts, missing insulation, or jerry-rigged electrical. Just because something looks updated doesn’t mean it was done correctly.

⚠️ Red flag: If you see mismatched materials, uneven tile, or gaps around trim, inspect more deeply—you may be dealing with a cover-up job.

5. 

Inconsistent or Settling Floors

Uneven flooring could mean joists have warped or sagged over time. It’s common in older homes, but it can affect layout changes, cabinetry installation, and long-term stability if not corrected during your renovation.

⚠️ Red flag: If a marble rolls across the floor, or you feel a dip when walking—your subfloor may need attention before any upgrades begin.

Final Thoughts

Spotting these red flags early won’t stop you from renovating—it will just help you do it right.

At Hazi Builders, we look beneath the surface so our clients can build with confidence. Whether you’re planning a kitchen remodel or a full gut renovation, we help you make informed choices based on the real condition of your home.

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