The bones vs. the looks
A listing sells the looks. What costs you money after closing is the bones, the systems. Read them both, and a staged flip stops looking like a safe bet while a plain house with newer mechanicals starts to.
Electrical red flags
- Knob-and-tube wiring, pre-1950 homes; can make a home uninsurable; rewire $10,000 to $25,000+.
- Federal Pacific & Zinsco panels, breakers that can fail to trip; replace ~$1,500 to $4,000.
- Aluminum branch wiring, 1965 to 1973; overheats at connections; remediation ~$50 to $100 per connection ($2,000 to $5,000 typical whole-home).
Plumbing red flags
- Poly-B plumbing, grey plastic pipe; a growing insurance issue; repipe $6,000 to $18,000.
- Galvanized supply pipe and lead service lines, old metal pipe that clogs or leaches.
- Water heater age, 8 to 12 years is the danger zone.
Roof, structure & exterior
- Roof near end-of-life and ice damming.
- Foundation cracks, which are ordinary and which mean movement.
- Negative grading & drainage, the cheapest fix with the biggest payoff.
What to do with a red flag
A flag isn't a signal to walk away, it's a question and a number. Confirm it with the right pro, get a quote, and negotiate. That's the whole point of a smarter first look. Not sure whether a flag is worth walking from? See is it a dealbreaker? Most flags cluster by building era, buying an older home in Canada maps them decade by decade.