Can I Do a House Inspection
Myself?
Technically, nothing stops you. But what a homebuyer can check in a walkthrough and what a licensed inspector finds are two very different things. Here’s how to think about it.
Yes.
But “yes” is not the same as “sufficient.”
There is no Oregon or Washington law that requires you to hire a home inspector before buying a house. You can walk through a home yourself and call it your inspection. The question worth asking is: what will you actually find, and what will you miss?
This question comes up most often in two situations: buyers who are trying to save money, and buyers who have construction or trade experience and feel confident in their ability to evaluate a home. Both are legitimate starting points. Neither changes the answer much.
What follows is an honest breakdown of what a self-inspection gets you, what it does not, and where the real risk lives.
The Things a Careful Buyer Can Spot
A motivated buyer walking through a home with time and attention can identify some real concerns. These are worth looking for on any showing, regardless of whether you plan to hire an inspector.
Visible water stains
Ceiling stains, discoloration at wall bases, and rust streaks at windows are all signs of past or current water intrusion.
Sloping or uneven floors
A marble or ball rolled across the floor reveals movement that is easy to feel underfoot in older homes.
Doors and windows that stick
Frames that have racked and no longer close properly can indicate foundation movement or significant moisture damage.
Cracks in walls or ceilings
Diagonal cracks at window and door corners, or wide cracks in the foundation visible from the exterior, are worth noting.
Condition of the roof surface
From the ground, missing shingles, curling edges, and obvious moss growth are visible on many roof types.
Grading at the foundation
Soil or mulch beds built up against the siding, or ground that slopes toward the house, are simple visual findings.
General condition of fixtures
Running faucets, flushing toilets, and checking under sinks for evidence of past leaks is something any buyer can do.
Age of major systems
The data plate on a furnace or water heater tells you the manufacture year. Old equipment is worth noting.
That is a meaningful list. A buyer who does all of this before an offer is better informed than one who does not. But notice what is missing from it.
What a Self-Inspection Cannot Find
The inspection findings that matter most are almost never the ones visible from a normal walkthrough. They are in the attic, the crawlspace, the electrical panel, and other places a walkthrough skips. They require specific knowledge to recognize even when you are standing in front of them.
| What a buyer typically sees | What a licensed inspector evaluates |
|---|---|
| The ceiling below the attic | Attic moisture, inadequate ventilation, damaged sheathing, signs of past roof leaks at the decking |
| The floor surface in living areas | Crawlspace moisture, standing water, failed vapor barrier, wood rot at beam ends, visible signs of possible pest activity |
| Whether outlets work | Panel type and condition, double-tapped breakers, aluminum branch circuit wiring, missing GFCI and AFCI protection, improper wiring at the panel |
| Whether the heat turns on | Visible furnace condition and age, flue venting concerns, combustion air concerns, and signs that call for an HVAC technician’s evaluation |
| The pipe material under a sink | Polybutylene supply lines throughout the home, galvanized steel at reduced flow, CPVC with heat exposure, improper DWV configurations |
| Whether the roof looks old | Flashing condition at all penetrations and valleys, improper layering, deck condition where visible, chimney cap and crown, gutter attachment and slope |
“But I Have a Contractor Friend…”
This comes up often. A buyer knows someone in construction (a GC, a plumber, an electrician) and plans to have them walk the home instead of hiring an inspector. This is better than nothing, but it is still not the same thing.
A general contractor evaluates constructability and rough condition. They are not trained in the systematic evaluation of all home systems (electrical, plumbing, HVAC, roofing, foundation, and crawlspace) as a single inspection discipline. They will catch things a layperson misses. They will also miss things a dedicated home inspector would find, because their training and experience are organized differently.
More practically: a contractor friend is not insured for this role, is not generating a documented report, and has no professional liability for what they do or do not find. Licensed home inspectors generally carry errors and omissions insurance because inspection is a professional service with documented accountability.
The right use of a contractor friend is after the inspection, to review findings, provide repair estimates, or evaluate a specific concern the inspector flagged. That is where their expertise adds real value.
What Skipping an Inspection Actually Costs
The most common reason buyers consider a self-inspection is cost. At Trusted Home Inspections, a single-family inspection is $395 for homes up to 1,000 sq ft and $545 for homes of 2,001 – 2,500 sq ft, plus an older-home adjustment for homes built before 1980. That is real money during a transaction full of expenses.
The practical question is what you are protecting against. A failed heat exchanger on a furnace typically costs $1,500 to $4,000 to address. A crawlspace with significant moisture damage and failed vapor barrier can run $3,000 to $8,000 to remediate. Replacing a Federal Pacific electrical panel commonly runs $2,500 to $5,000. Repiping a home with polybutylene plumbing can run $4,000 to $10,000.
None of those findings are visible from a buyer walkthrough. Any one of them costs more than an inspection. Most of them are found at a meaningful rate in the Portland-area housing stock.
If you are buying a home and want to know what a professional inspection covers in detail, the buyer’s inspection page walks through the full scope. Thermal imaging, which can show temperature differences that may point to moisture, invisible to the naked eye, is included at no additional charge on every inspection.
Can I Do a House Inspection FAQ
