Why this small cost saves you from a bigger one
What a standard inspection costs
A standard visual roof inspection costs 150 to 300 dollars in the US, or roughly 190 to 375 CAD in Canada, for an average single-story home. That's a small cost compared to the thousands you'd spend removing and reinstalling solar panels if a roof problem surfaces after the install. An inspection also confirms the roof area the array can use, and the roof space vs output estimator turns that area into an expected output figure.
Why inspection type changes the price so much
A visual inspection is a trained eye checking for surface wear like curling, cracking, and granule loss, which takes less time and equipment than more advanced methods. Infrared inspections use thermal cameras to spot moisture trapped under the roof surface, something invisible to the naked eye, and that added technology and expertise pushes the cost to 400 dollars or more. For the maintenance & lifespan side of this decision, see annual inspection cost estimator.
When a full structural assessment makes sense
If your roof is older, has visible sagging, or you're planning a heavier solar array with ballasted mounting, a full structural assessment goes beyond the roof surface to check rafters, trusses, and load capacity. The structural engineer assessment cost tool covers this specific service in more depth, since it's often billed separately from a standard roof inspection. PNNL's overview of roofing components and performance covers this point in more depth.
Ask your installer before booking separately
Many solar installers include a basic visual inspection as part of their free site assessment, so it's worth asking before paying for a separate one. If your installer's inspection turns up concerns, that's the point where a more advanced inspection type, like infrared or structural, earns its higher cost. The roof remaining lifespan estimator gives a quick age-based estimate before you commit to a paid inspection, and the roof condition checklist tool covers what a visual walk-around might flag first. If you'd rather set up ongoing checks instead of a one-time inspection, the annual inspection cost estimator covers what that recurring service typically runs.
Reading the FTC's guidance on avoiding a home improvement scam is worth doing before hiring anyone for a paid inspection, and PNNL's overview of roofing components and performance covers what a thorough inspection actually looks for beneath the surface.