NPMA-33 Pest Inspection: What It Covers and Why It Matters

What the NPMA-33 Pest Inspection Form Is

The NPMA-33 is the standard form used by pest management professionals to document wood-destroying organism inspections. The National Pest Management Association maintains it, and lenders, buyers, and sellers rely on it to confirm whether a structure has active or past infestation by termites, carpenter ants, wood-boring beetles, or other WDOs. A completed NPMA-33 is often a condition of a real estate transaction, and its standardized layout makes it easier to compare findings across properties.

It is not a treatment report. It records observations made during a visual inspection of accessible areas and notes conditions conducive to infestation. The form is widely accepted by lenders that require a WDO certificate, though acceptance can vary by institution and location.

How the NPMA-33 Is Structured

The form is organized into clearly labeled sections that guide the inspector from the exterior of the structure to the interior, attic, and crawlspace. Each section asks the inspector to note visible damage, active infestation, and conditions that could attract pests. Key sections include:

• Property identification and inspection scope
• Exterior assessment of the foundation, siding, and grade
• Interior rooms, focusing on windows, doors, and flooring
• Attic and crawlspace, where concealed damage often appears
• Conducive conditions, such as moisture problems or wood-to-soil contact
• Summary of findings and recommendations

What Inspectors Look For on the NPMA-33

During a NPMA-33 pest inspection, the professional is looking for evidence of current or past WDO activity. That includes mud tubes on foundation walls, frass or sawdust near wood members, hollow-sounding wood when tapped, and galleries or tunnels inside wood structures. The inspector also notes conditions that make a building vulnerable, such as poor drainage, leaking plumbing, or cellulose debris in contact with the ground.

The form requires the inspector to distinguish between active infestation and damage that has been treated and is no longer live. This distinction is important because lenders use it to decide whether further treatment is needed before closing.

Who Uses the NPMA-33 and Why

The NPMA-33 is most often required by mortgage lenders as part of the underwriting process. It protects the lender's collateral by identifying WDO damage that could affect the structural integrity of the property. Buyers use it to make informed decisions, and sellers may complete it proactively to speed up the transaction.

Pest management companies that are licensed and certified to perform WDO inspections are the only professionals authorized to complete the form. The inspector must be qualified under state regulations, and the form carries the inspector's signature, license number, and date of inspection.

Limitations of the NPMA-33 Pest Inspection

The NPMA-33 is a visual, non-destructive inspection. It does not involve drilling into walls, removing flooring, or using moisture meters or infrared cameras unless the inspector's scope includes those tools. For that reason, it may not reveal concealed damage behind finished walls, under insulation, or in areas that are inaccessible.

Buyers should understand that the inspection reflects what can be seen on the day of the visit. Conditions change, and a clean NPMA-33 does not guarantee that no WDO activity exists or will occur in the future.

What Buyers Should Do After Receiving the NPMA-33

Review the findings carefully. If the form shows active infestation or untreated damage, ask the seller whether treatment is planned or if the repair responsibility falls to the buyer. If the inspection reveals conducive conditions, consider whether a separate treatment or repair plan is needed before or after closing.

Keep the completed NPMA-33 with your closing documents. It serves as a baseline record of the property's condition at the time of purchase and can be useful if WDO issues arise later.

NPMA-33 vs Other WDO Reports

While the NPMA-33 is the most recognized WDO form, some states or lenders may accept or require alternative reports. The key difference is usually in layout and local regulatory requirements. The core purpose remains the same: to provide a standardized record of WDO findings and conditions.

Final Considerations for NPMA-33 Pest Inspections

A NPMA-33 pest inspection is a critical step in many real estate transactions. It provides a clear, documented snapshot of WDO risk at a specific point in time. For buyers, understanding what the form covers and what it does not helps set realistic expectations. For sellers, a timely inspection can address issues before they become deal-breakers. Working with a licensed, experienced pest professional ensures the inspection is thorough and the form is completed accurately.