How Much Does Mold Testing Cost?

Mold testing starts at $375, which includes one exterior (baseline) sample and one interior sample, and covers properties up to 1,000 sq ft.

That base price is the right starting point for most typical homes and smaller properties.

How Mold Testing Pricing Works

For larger properties, pricing scales in $105 increments per additional 1,000 sq ft, which generally corresponds to one additional interior sample.

In practice, that looks like:

• 1,001–2,000 sq ft: $480

• 2,001–3,000 sq ft: $585

• 3,001–4,000 sq ft: $690

The exterior baseline sample is only collected once per test regardless of property size — it's the interior sampling that scales with square footage.

What's Included in the Price?

What's included at every tier:

• The full on-site collection visit (about 30 minutes)

• Accredited lab analysis of all samples

• A clear written report explaining your results, comparison to the outdoor baseline, and what the findings mean

There's no separate charge for the report itself or for the baseline comparison — those are part of the base service at every size.

Adding Surface Sampling

If you have a specific area of visible concern (a stain, discoloration, or a spot with a history of moisture), targeted surface sampling can be added to a standard air-sampling test.

This is a good conversation to have with your technician when scheduling, so pricing reflects exactly what you need tested.

Schedule a radon or mold test today with DezAir Quality Testing online at dezairqualitytesting.com.