Do You Need a Termite (WDO) Inspection to Buy or Sell a Home?
A quick checker plus plain answers on cost, who pays, and the clearance letter — for 2026.
✓ Reviewed June 23, 2026 · sources: VA, NPMA, state pest programsUsually yes — if a mortgage is involved. A termite/WDO inspection is required for most VA loans and for FHA or conventional loans when the appraiser flags pest evidence.
You don't legally need one just to own a home, but it's strongly recommended in high-termite regions (the South, Southwest, California).
Do I need a termite/WDO inspection?
Answer 3 quick questions. Informational only — confirm with your lender/agent.
⚠ Guidance only — not an official determination. Always confirm with your lender/insurer and the official source (.gov) before acting. See Disclaimer.
Quick facts
| Required to buy/sell? | Mortgage-driven: most VA loans (30+ states); FHA/conventional if flagged |
|---|---|
| Document | WDI report Form NPMA-33; "clearance letter" = result after treatment |
| What's checked | Live activity, mud tubes, frass, damaged wood, conducive conditions |
| Inspection cost | ~$75–$175 (avg $100–165); often free if you book treatment |
| Treatment (if needed) | ~$230–$1,000; fumigation $1,500–$8,000 |
| Who pays | Negotiated — seller often pays inspection (conventional); buyer often on FHA |
| Validity | ~90 days for mortgage use |
When is it required?
Most VA loans require a wood-destroying-insect report in 30+ states (VA Circular 26-22-11); FHA and conventional loans require it only when the appraiser or contract flags pest evidence. The report — Form NPMA-33 from the National Pest Management Association — is generally valid about 90 days for mortgage use.
WDO vs WDI vs "termite inspection"
These overlap: a WDO (wood-destroying organism) inspection is broadest — termites plus carpenter ants/bees, wood-boring beetles and wood-decay fungi (the EPA notes subterranean termites cause the most U.S. structural damage); a WDI (wood-destroying insect) inspection covers insects (the term used in Texas and the VA program, on Form NPMA-33); a plain "termite inspection" is the narrowest. A clearance letter isn't an inspection — it's the document confirming no active infestation after any treatment.
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Common questions
Do I need a termite inspection to buy a house?
How much does a termite inspection cost?
Who pays for the termite inspection, buyer or seller?
What is a termite clearance letter?
How long is a termite inspection valid?
Key terms
- WDO / WDI
- Wood-destroying organism / insect — the formal scope of the inspection.
- NPMA-33
- The standard national WDI inspection report form used for mortgages.
- Clearance letter
- Proof of no active infestation issued after treatment (CA: clear Section 1).
- Section 1 vs Section 2 (California)
- Section 1 = active infestation/damage (must usually be fixed); Section 2 = conditions likely to lead to it (disclosed, not required to fix).
Sources
- VA home loans & pest policy — benefits.va.gov (VA Circular 26-22-11), accessed Jun 2026
- WDI report Form NPMA-33 — National Pest Management Association, accessed Jun 2026
- Termites & treatment — U.S. EPA, accessed Jun 2026
- FHA single-family — HUD, accessed Jun 2026
- Cost ranges — HomeAdvisor / Angi 2025–2026 (directional)