Older Home Inspections in London, Ontario: What Buyers Need to Know Before Purchasing a Heritage Property

London, Ontario, has no shortage of beautiful older homes. The established neighbourhoods, the mature trees, the solid brick construction — there's a reason buyers are drawn to them. But purchasing a home that's 80, 100, or even 120 years old is a very different experience than buying something built in the last two decades, and the inspection process reflects that.

An older home inspection in London, Ontario requires a different eye. The systems are aged, the construction methods are unlike anything in modern buildings, and the things that can go wrong are specific to homes of that era. At Checkmark Home Inspections, I've inspected many of these properties across London and Southwestern Ontario, and I always approach them with the extra care and context they deserve.

What Makes an Older Home Different to Inspect?

Homes built 80 to 100+ years ago were constructed with materials and methods that simply aren't used anymore. That's part of their charm — but it also means the inspection needs to account for things you'd never encounter in a newer build.

Knob-and-tube wiring is one of the most common findings. For decades, this was standard electrical practice, and a lot of it is still in service in older London homes. It's not automatically a deal-breaker, but it needs to be documented, assessed for condition, and flagged to your insurance provider — many carriers have strict requirements around it.

Lead pipes and galvanized steel plumbing are another common reality in homes of this age. Galvanized pipe corrodes from the inside out over time, restricting water flow and eventually failing. Lead service lines are a health concern and are often flagged for replacement by the municipality. I note any visible evidence of these materials during every older home inspection in London, Ontario.

Foundations in homes this age — stone rubble, brick, or early poured concrete — behave very differently from modern construction. Settlement, cracking, and moisture coming through foundation walls are common, and Ontario's spring thaw tends to make any existing issues more visible.

What I Pay Close Attention To

The roof and attic. Older homes often have multiple layers of roofing material, modified framing, or low-slope sections that need a careful look. The attic is especially telling — I check the structure, insulation levels, ventilation, and any signs of moisture or previous leaks. Ice damming is a recurring issue in Ontario winters, and the damage it causes often shows up first in the attic.

The basement and foundation. Water management is one of the biggest concerns in older London homes. Stone and brick foundations were never designed to be fully waterproof, and many have been patched or waterproofed over the years with varying degrees of success. I look carefully at the walls, the floor, the grading around the exterior, and any sump pump setup.

Electrical systems. Beyond knob-and-tube, I'm looking at the service panel, the size of the electrical service coming into the home, and whether updates have been made — and whether those updates were done properly. A home that's been partially rewired can actually present more complexity than one that hasn't been touched.

Heating systems. Older homes in London often have original or early-generation heating equipment — cast iron radiators, gravity furnaces, oil tanks, or early forced-air systems. I evaluate the age, condition, and safety of whatever is in place, and flag anything that warrants further evaluation by a licensed HVAC technician.

The structure itself. Older construction used dimensional lumber that's actually larger than modern framing, which is generally a good thing. But decades of settling, modifications, and the occasional DIY renovation can affect structural integrity. I look carefully at the visible framing, floor systems, and any signs of movement or past alteration.

How Infrared Imaging Helps in Older Homes

One of the most valuable tools I use when inspecting older homes is infrared thermal imaging. Homes this age have had decades of opportunities for moisture to find its way in — and not all of it leaves visible evidence on the surface. The thermal camera detects temperature differences behind walls and ceilings that can indicate hidden moisture, missing insulation, or air leakage.

In London and Southwestern Ontario, where freeze-thaw cycles put constant pressure on older building envelopes, this non-invasive look behind the surfaces adds real value. What looks perfectly fine in August may have been letting water in all winter long.

Should You Still Buy an Older Home?

Absolutely — if you go in with clear eyes. Older homes in London are often solidly built, full of character, and located in some of the best neighbourhoods in the city. The key is understanding exactly what you're buying before you sign.

A thorough older home inspection in London, Ontario isn't there to scare you away from the property. It's there to make sure you understand the condition of what you're purchasing — what needs attention now, what can wait, and what to budget for down the road. That's information every buyer deserves to have.

As a certified InterNACHI member, I follow a rigorous Standards of Practice on every inspection. For older homes specifically, I take additional care to document the age-specific features and systems that are unique to these properties.

See all inspection services available across London and Southwestern Ontario: https://www.londonhomeinspector.ca/services

Ready to schedule your older home inspection in London, Ontario? https://www.londonhomeinspector.ca/schedule-now

Thinking About Selling an Older Home?

If you're selling an older home, a pre-sale inspection is worth serious consideration. Homes this age often have deferred maintenance that sellers aren't fully aware of — and surprises that surface during a buyer's inspection can derail a deal quickly. Getting ahead of it gives you the chance to address issues on your own terms. I offer both pre-purchase and pre-sale inspections throughout London and Southwestern Ontario, and for older properties in particular, both have real value.

London's older housing stock is part of what makes this city special. At Checkmark Home Inspections, I'm here to help buyers and sellers navigate it with confidence.