What Is a Red Flag When Buying a House? 10 Things Every Buyer Should Watch For

When you’re buying a home, it’s easy to fall in love with the kitchen, the layout, or the backyard — but it’s the red flags you don’t notice that can cost you thousands later.Whether you’re a first-time buyer or seasoned mover, here are the biggest warning signs to watch for in London homes.

1. Foundation Cracks

Not all cracks are serious — but large horizontal cracks or ones wider than a few millimeters can signal structural movement. Homes in older neighbourhoods like Old North and Wortley Village should always get a close inspection.

2. Moisture or Mold

London’s climate makes basements a hotspot for moisture issues.Common signs:

• Musty smell

• Fresh paint patches (hiding discoloration)

• Visible mold in corners or cold rooms

• Soft drywall

Moisture problems can turn into expensive repairs if ignored.

3. DIY Electrical Work

Unlicensed wiring is common in older homes.Red flags include:

• Mixed wire types

• Open junction boxes

• Fuses instead of breakers

• Outlets warm to the touchElectrical rework can cost thousands — so this is one worth investigating.

4. Roof Damage

London winters are tough on roofs. Watch for:

• Missing shingles

• Sagging

• Granules in the gutters

• Visible patchesA failing roof can lead to leaks and major interior damage.

5. Poor Drainage

If water pools around the foundation, you may have grading issues.Signs of poor drainage:

• Muddy patches

• Downspouts draining beside the house

• Basement dampness

• Cracked foundation blocks

6. Signs of Pest Activity

Everything from carpenter ants to mice can cause damage.Look for:

• Droppings

• Sawdust piles

• Chewed insulation

• Soft wood near windows

Many older neighbourhoods experience this, so an inspection is crucial.

7. HVAC That’s Past Its Lifespan

Older furnaces and AC units can mean upcoming expenses.A healthy HVAC system means:

• Even temperature

• Reasonable utility bills

• No excessive noise

In London’s climate, a bad heating system is a serious cost.

8. Strange Smells

It sounds simple, but trust your nose — must, chemicals, sewage, or heavy “masking” scents can all be signs of hidden problems.

9. Fresh Paint in Only Certain Spots

A freshly painted entire room is normal.Fresh paint only on:

• One wall

• One patch

• Only the ceiling…likely means they’re covering a problem.

10. Sellers Who Won’t Allow Inspections

This is the biggest red flag of all.If a seller refuses or pushes back against an inspection in a normal, balanced market…Walk.

There’s no good reason for a seller to block proper due diligence.

Bottom Line

Red flags don’t always mean “don’t buy the house” — but they do mean “slow down and get answers.”With the right realtor (hi 👋) and a strong home inspector, you can confidently navigate these issues and avoid surprises.

If you want help spotting red flags — or if you’d like me to walk you through a home you’re considering — reach out anytime.

Justin Skrypnyk

Real Estate Broker

519-639-5176