Commercial Mold Inspection in Spokane

Commercial mold inspection is third-party assessment of a building you are responsible for: where moisture is entering, whether fungal growth is present, how far it extends, and what a defensible written record of that looks like. We do the assessment. We do not perform the remediation, we do not bid it, and we take no referral fee from the contractor who does. On a commercial job that is the operational point, not a slogan, because the report is going to be read by a carrier, a tenant's counsel, an owner, or all three.

Small commercial work under 5,000 square feet runs $650 to $950 depending on sample count. Larger buildings and multi-unit properties are quoted, typically $0.10 to $0.20 per square foot plus per-sample. Net 30 is available for established accounts.

We work across Spokane County and Kootenai County: office, retail, warehouse and light industrial, restaurant and food service, mixed use, and the older masonry and heavy timber stock downtown that behaves differently than anything built after 1990.

When a commercial building actually needs testing

Four situations account for most of the calls, and they have different scopes.

A remediation proposal is on your desk and you have not signed it. This is the highest-value use of an independent assessment and the one most owners skip. A contractor has walked the space and produced a scope: linear feet of wall removal, containment count, ceiling tile replacement, HVAC cleaning, a number at the bottom. Nobody has independently established the boundary of wet material. We map moisture, define the affected area with instrument readings, and give you a documented extent to compare the proposal against. If the scope is proportionate, you sign it knowing that. If it is not, you have the evidence to say so before the money moves.

A tenant, employee or occupant complaint has escalated. Somebody reported odor, visible growth, or symptoms they attribute to the building. Once that is in writing, the exposure is documentation, not the mold. A dated third-party report with instrument readings, photographs, lab data and chain of custody closes the file in a way that an internal maintenance note does not.

A water loss occurred and the carrier wants substantiation. Water damage and freezing claims run at 1.61 per 100 insured properties per year with average severity near $13,954 on the residential side, and commercial losses scale from there. Adjusters ask what was wet, how far it spread, and whether growth established. Those are testable questions.

Pre-acquisition or pre-lease due diligence. You are buying a building or signing a long lease and the walk-through raised a question. Testing before the paper signs is cheaper than testing after.

What is different about sampling a commercial building

Residential logic does not transfer cleanly. Three things change.

Mechanical systems move air between zones. In a house, a spore source stays roughly where it grows. In a building with ducted supply and return, a wet AHU coil pan, a saturated section of internal duct liner, or a return plenum drawing across a wet chase distributes particulate across every space on that branch. That means occupant complaints often cluster by air handler rather than by proximity to the water. We ask for mechanical drawings or at minimum a zone map before designing the sample plan, because sampling by floor plate when the system is zoned vertically produces data that means nothing.

Volume changes what a spore count represents. A 30,000 square foot warehouse with 24 foot clear height holds an enormous air volume relative to a source. Dilution can mask a real problem in a large open space, which is why surface sampling, moisture mapping and direct inspection of the building envelope carry more weight in warehouse and big-box work than air data alone.

Occupancy affects the result. Foot traffic, door cycling, and material handling resuspend settled particulate. A sample pulled during a shift and a sample pulled at 6 a.m. in the same room are not the same measurement. We will tell you which condition you want documented and why. Sometimes it is occupied conditions, because that is what the occupants are actually breathing. Sometimes it is a quiescent baseline. It should be a deliberate choice recorded in the report, not an accident of when we could get in.

Testing around occupancy

Closing a floor costs more per day than the entire assessment. We schedule around that.

• After hours and overnight, standard, at no premium
• Weekends
• Zone by zone so only one area is affected at a time
• During scheduled shutdowns, holidays, or tenant improvement windows
• Coordinated with your security, badge access, and any escort requirement

Air sampling equipment is a pump about the size of a lunch box running for five to ten minutes per location. It is quiet and it does not require a space to be cleared. In practice the visible disruption in an occupied office is one person with a case walking a floor. Thermal imaging and borescope work is where access matters, because we may need to open a ceiling tile or drill a discreet inspection port in a cavity, and that is worth doing off hours.

Tell us at booking whether occupants have been notified. Some clients want the work invisible. Others want it visible precisely because visible action is what settles a complaint. Both are fine, but it changes how we introduce ourselves on site.

What the assessment includes

Every commercial job, without variation:

• Air sampling with a calibrated pump drawing a measured volume through a spore trap cassette, Air-O-Cell or Allergenco-D, submitted to an accredited laboratory for direct microscopic examination
• An outdoor control sample on every job. Outdoor air always contains mold spores. An indoor count without a same-day outdoor baseline from the same property cannot support a conclusion, and opposing counsel or a competent adjuster will identify that immediately. Elevated means elevated relative to outside, not elevated in absolute terms
• Surface sampling by swab or tape lift to confirm whether visible growth is fungal rather than staining, soot or mineral efflorescence
• Bulk sampling where a material sample is the cleanest way to answer the question
• Moisture mapping with pin and pinless meters across affected and adjacent assemblies
• Thermal imaging to locate temperature differentials behind intact finishes, including above hard-lid ceilings and behind casework
• Borescope inspection of wall cavities, chases and plenum spaces
• Psychrometric readings by zone: temperature, relative humidity and dew point, indoors and out
• Mechanical walkthrough where systems are implicated: AHU interiors, coil and drain pan condition, filter condition and MERV rating, visible duct liner, return path
• Written report with photographs keyed to locations and a floor plan reference, raw laboratory data, indoor to outdoor comparison, chain of custody, and a clear statement of method and limitations

Post-remediation verification is evaluated against IICRC S520, the industry standard for professional mold remediation. Commercial clearance is quoted by containment count, since a job with six containments is six discrete verifications, not one.

Commercial pricing

Quotes are fixed before we mobilize. You get a written scope with sample count, areas covered, schedule and price, and we do not revise it on site without your approval in writing.

Documentation that survives review

Assume the report will be read adversarially. That assumption drives how it is built.

Every sample carries a location, a time, a measured volume, a pump identifier and a chain of custody entry. Every instrument reading records the material and the reference dry standard used for comparison. Every photograph is keyed to a location on a plan. The laboratory is accredited and its raw data is attached rather than summarized.

The language is equally deliberate. There is no numeric legal limit for airborne mold in Washington, Idaho or federal law. Nothing "passes" or "fails" a statutory threshold, and any report claiming otherwise is inventing a standard. What we establish is condition, comparison to outdoor baseline, moisture state, and the extent of affected material. We also keep health language accurate. CDC has never established a causal link between Stachybotrys and serious illness, and says no test proves an association between a specific mold and particular health symptoms. Documented effects are allergic response, asthma triggering and upper respiratory irritation in sensitive people, plus serious infection risk in the severely immunocompromised. A report that overclaims creates liability for the owner rather than reducing it.

Why the independence matters more on commercial work

Washington's Department of Health states plainly that there are no certification requirements for mold work in the state and that anyone can call themselves a mold specialist without training or credentials. Idaho licenses neither mold work nor home inspection. In that vacuum, nearly every firm marketing mold testing in this market also sells the cleanup.

New York decided that arrangement was structurally unsound and banned it under Labor Law Article 32, which prohibits a company from both assessing and remediating the same property. Washington and Idaho have no equivalent rule, so independence here is chosen rather than required.

For a commercial owner the consequence is concrete. A scope written by the party who will perform it is not evidence of extent, and if the loss becomes a claim or a dispute, that is exactly what it will be asked to be.

Common questions

How long does a commercial assessment take on site? A single-tenant suite under 5,000 square feet is typically 2 to 3 hours. Multi-floor or multi-building work is scoped by the day. We give you a time estimate with the quote.

How fast do results come back? Laboratory results normally return in 1 to 3 business days and the written report follows within one day of that. Rush 24 hour lab is available for $100 per job.

Can you validate a remediation scope we have already been given? Yes, and it is one of the most common reasons we get called. We assess and document extent. We do not write remediation scopes or bid the work, which is what makes the comparison meaningful.

Do you carry insurance and can you be added to our approved vendor list? Yes. Send us your vendor packet, insurance requirements and any certificate language you need and we will complete it before the first job.

Will you work with our restoration contractor? Yes. We schedule around active containments and we do not have a financial relationship with any remediation firm in either market.

Get a commercial quote

Send the address, square footage, building type, the areas in question, and your access constraints. We will return a written scope and a fixed price, usually the same day.