Typical price ranges in Seattle
Published 2026 guides to the Seattle market put a visual-only inspection of a single-family home at roughly $400 to $600, and a visual inspection with paired indoor and outdoor air samples at roughly $600 to $1,200, depending on the number of samples and lab fees. Angi's local data puts mold testing in Seattle at $335 to $1,120.
A quote far below those ranges usually means a visual-only walk-through with no lab analysis.
What drives the cost
Number of air samples
This is the biggest factor. Every spore trap sample carries its own lab fee. A focused inspection might use one or two indoor samples plus an outdoor comparison; a larger home or a whole-house concern may need four or more.
Home size and access
Larger homes, crawl spaces, attics and finished basements take more time to inspect.
Lab turnaround
Standard results take a few business days. Rush results, often needed during a home purchase, cost more.
Report quality
A useful report explains each finding and what the lab numbers mean for your home, not just a printout from the lab.
Inspection cost vs. remediation cost
An inspection is usually a small fraction of what remediation costs. Spending a few hundred dollars to define the scope helps you avoid paying for work you do not need, or missing a problem that keeps growing.
How to compare quotes
Ask every company the same questions. How many indoor and outdoor samples are included? Which lab analyzes them, and is it accredited? What will the report include? Do you, or a company you are affiliated with, perform remediation? A cheap or free inspection from a company that also sells remediation is not the same product as an independent assessment.
What All Haven charges
Our price depends on the size of your home and how many samples your situation actually needs. Every quote is itemized before anything is scheduled, and we do not sell remediation. Tell us about your home and we will send you a quote.
Frequently asked questions
Is a DIY mold test kit worth it?
Petri dish kits from hardware stores almost always grow something, because mold spores are present in all indoor and outdoor air. Without a measured air volume and an outdoor comparison, the result is very hard to interpret.
Does homeowners insurance cover a mold inspection?
Sometimes, when it is tied to a covered water loss. Check with your insurer before you book.