Termite Treatment Cost in California (2026)

The California WDPO inspection report is the most consequential pest-control document in any California real estate transaction. The Structural Pest Control Board requires the standardized report to be issued by a licensed inspector and to categorize all findings under two distinct sections.

Section 1 findings are active infestations or evidence of past infestation that has caused or is causing damage requiring correction. Examples include visible drywood termite activity in attic framing, mud tubes on the foundation indicating active subterranean colony, structural wood with significant damage from past activity, and visible signs of fungal decay. Section 1 findings must be addressed; the inspection report identifies recommended corrections and estimated cost. In real estate transactions, Section 1 corrections are almost always handled before close, with the seller typically paying. Sellers can either complete the treatment before close (cleanest option) or provide a credit to the buyer (typically 110 to 130 percent of treatment cost to compensate for inconvenience).

Section 2 findings are conditions conducive to future infestation that do not currently require treatment but should be monitored. Examples include wood-to-soil contact at deck posts, missing or damaged sub-area ventilation, evidence of past treatment without active infestation, and accessible moisture sources that could attract dampwood termites. Section 2 findings are typically informational and negotiable. Some buyers ask sellers to address them, but most accept Section 2 findings and address them on their own timeline after closing.

The cost implications run in both directions. A seller facing significant Section 1 findings may face $4,000 to $9,000 in treatment cost before listing (a full Vikane tent fumigation, for example, with associated damage repair). A seller with only Section 2 findings can usually list with the report disclosed and incur no out-of-pocket treatment cost. Buyers reading WDPO reports should pay particular attention to the Section 1 cost estimates because these are the seller-paid line items at closing; buyers should expect them to be reflected in the negotiated purchase price.

The standard pre-listing strategy in California is to commission a WDPO inspection 60 to 90 days before listing, address Section 1 findings immediately, document the work with a completion certificate, and list with the original report plus the completion certificate showing the work was done. This is the cleanest path to a smooth closing. The alternative (let the buyer's WDPO inspector find Section 1 issues during escrow) almost always costs the seller more in negotiated credits than the original treatment would have cost.

One technical detail worth knowing: a WDPO report is good for two years from the inspection date in California (longer than most other states), which means a thoughtful seller can address findings, get the certification, and have time before listing. The report can be reissued by the same inspector as a "current" status for a small fee if the seller wants to update timing before listing.

The California treatment-method choice for confirmed drywood activity is genuinely complex, and the trade-offs deserve careful consideration. Three methods are viable for whole-home drywood control. Each has structural advantages and disadvantages relative to California conditions.

Vikane tent fumigation is the dominant method in California for confirmed widespread drywood activity. The structural advantage is that the gas penetrates every void in the structure; if the tarp can seal it, the gas reaches it. This is particularly valuable in California where housing stock includes many 1920s and 1930s wood-frame homes with extensive interior wood that is otherwise hard to reach. The disadvantage is the 48 to 72 hour vacate window. The Vikane treatment cost runs $4,000 to $9,000 in coastal markets and $3,800 to $6,500 in inland markets for a typical 2,000 sq ft home. A clean Section 1 clearance on the WDPO report is the financial value at closing.

Whole-home heat treatment is the chemical-free alternative. The structural advantage is no chemical residue (relevant for households with chemical sensitivities) and same-day re-entry (relevant for households where 48 to 72 hours of alternative housing is operationally difficult). The disadvantage is reliability on California's many stucco-clad structures. Stucco absorbs heat and shields the wood framing behind it from reaching the required 130 F core temperature. Operators should be specific about whether the structure is heat-treatable and should provide a wood-core temperature log proving the threshold was reached. Whole-home heat runs $5,500 to $10,500 in California, slightly above Vikane on the same home.

XT-2000 borate no-tent is the third option, less common but appropriate in specific scenarios. The structural advantage is that the homeowner does not need to vacate, the chemistry is genuinely safe in occupied structures (BoraCare and Tim-Bor are EPA-registered as low-toxicity products), and the treated wood gets lifetime residual protection. The disadvantage is access. XT-2000 only protects the wood the crew can actually treat; voids behind stucco, plaster, or finished surfaces remain untreated. Cost runs $3,800 to $5,500 in California, often cheaper than tent fumigation but with the access caveat.

For most California homeowners, the right method depends on three factors. First, the structure. Open-frame construction is heat-friendly. Heavily stucco-clad construction is Vikane-friendly. Mixed construction may push toward XT-2000 if accessibility is good. Second, the closing timeline if selling. A WDPO Section 1 clearance is the operative document, and the operator should commit to providing it before treatment begins. Third, household logistics. Vacate-night arrangements, pet care, and food bagging all add real cost and friction.

For California homeowners staying long-term rather than selling, pairing the primary treatment with a preventive borate (BoraCare) application of accessible attic framing is a high-value add-on. The borate adds $500 to $1,500 to the total cost and provides ongoing residual protection that the primary treatment cannot. In drywood-heavy California, the reinvasion rate makes this pairing economically defensible.