The cost of termite treatment in San Diego varies widely depending on the species, the extent of the infestation, and your home’s size. As rough ballpark figures, localized spot treatments often run a few hundred dollars, while whole-house tent fumigation for drywood termites can land anywhere from roughly $1,500 to $4,000 or more. Always get multiple bids from a licensed pest operator.
Why Termite Treatment Costs Are Hard to Pin Down
Termite work is one of those home expenses where a single number rarely tells the whole story. Two homes on the same San Diego street can get wildly different quotes because the cost is driven by what’s actually happening inside the wood, not by square footage alone. A small drywood colony caught early in a detached garage is a completely different job than an established subterranean infestation feeding off a slab foundation.
Before we get into ranges, an important note: we are home inspectors, not a licensed pest control company. A general home inspection is visual and non-invasive. We may note conducive conditions or visible evidence of wood-destroying organisms during an inspection, but we do not perform termite or WDO inspections, and we do not treat infestations. That work must be done by a California-licensed pest control operator. The ranges below are general estimates only, meant to help you budget and ask better questions, not a quote.
Subterranean vs. Drywood Termites: The First Cost Driver
San Diego County has two termite types that homeowners deal with most, and they require completely different treatment approaches, which is the biggest single factor in your bill.
Subterranean Termites
Subterranean termites live in the soil and build mud tubes to reach the wood in your home. Because they nest underground, treatment usually targets the soil and the foundation perimeter rather than the structure itself. Common approaches include liquid termiticide soil treatments (trenching and treating around the foundation) and in-ground bait stations installed around the property.
As a rough estimate, liquid soil treatments often fall in the range of a few hundred to a couple thousand dollars depending on the linear footage of foundation and how accessible it is. Bait systems may carry an upfront installation cost plus ongoing monitoring fees billed annually. Homes with post-tension or raised foundations can complicate access and affect pricing. If you want to understand how your foundation type plays into all of this, our overview of San Diego foundation types is a useful primer.
Drywood Termites
Drywood termites are the ones San Diego is famous for, especially in older coastal homes. They live entirely inside the wood with no soil contact, which means treatment is about reaching the colonies wherever they are in the structure. That’s why drywood jobs tend to cost more and why tent fumigation exists in the first place.
To understand which species you’re likely dealing with and how to tell them apart, see our breakdown of subterranean vs. drywood termites in San Diego. Identifying the species correctly is step one in getting an accurate bid, because no reputable operator will quote a fumigation for a problem that only needs a spot treatment.
Spot Treatment vs. Tent Fumigation
For drywood termites, the two main paths are localized (spot) treatment and whole-structure fumigation. The choice between them is often the difference between a few hundred dollars and a few thousand.
Spot / Local Treatment
Spot treatments target specific, accessible galleries using methods like injected termiticides, foams, borate applications, or localized heat. They work best when the infestation is limited, visible, and reachable. As a rough ballpark, spot treatments commonly run from around a couple hundred dollars to roughly $1,000 depending on how many areas need attention.
The tradeoff: spot treatment only addresses the colonies you can find. If drywood termites are established in multiple hidden areas, localized work may miss them, and you could be back at it within a year or two. Many operators offer spot treatment with a limited warranty, so read what’s covered.
Tent Fumigation
Whole-house fumigation (tenting) seals the structure and uses a gas fumigant to penetrate all the wood, reaching colonies you can’t see. It’s the most thorough option for widespread drywood infestations. As a rough estimate, tent fumigation in the San Diego area often falls between $1,500 and $4,000 or higher, and home size is the dominant variable here, since fumigant volume scales with the cubic footage of the structure.
Fumigation also carries indirect costs people forget to budget for: you and your pets have to vacate for two to three days, you may need to bag or remove food and medications, and landscaping near the foundation sometimes needs trimming for the tent to seal. Factor those into the real number.
Other Factors That Move the Price
- Home size and layout: Larger square footage and more complex rooflines raise both fumigation and perimeter-treatment costs.
- Severity and extent: A single localized colony is cheaper than a structure with multiple active infestations and existing wood damage.
- Access: Tight crawl spaces, dense landscaping, multi-story construction, and limited foundation access all add labor.
- Repairs: Treatment kills termites; it does not repair the damage they caused. Repairing compromised framing, fascia, or sills is a separate cost handled by a licensed contractor, and it can exceed the treatment itself in bad cases.
- Warranties and monitoring: Annual renewal or monitoring contracts add recurring cost but can be worth it in high-pressure termite zones near the coast.
How to Get an Accurate Number
The only way to know your real cost is to get bids from licensed professionals. Here’s how to do it well:
- Get at least two or three bids from California-licensed pest control operators. Verify any contractor’s license through the appropriate state board before hiring.
- Insist on a written inspection report that identifies the species, locates the activity, and explains why a given treatment is recommended.
- Be cautious of anyone who quotes fumigation sight-unseen. The recommendation should match the evidence.
- Separate treatment from repair. Ask each bidder to itemize so you’re comparing apples to apples.
Where a Home Inspection Fits In
If you’re buying, this is exactly the kind of issue you want flagged before you close. A general inspection won’t replace a dedicated WDO report, but it can surface red flags like moisture intrusion, wood-to-soil contact, and conducive conditions that invite termites in the first place. Our buyer’s home inspection gives you a full picture of the property’s condition so you can negotiate repairs or treatment credits with eyes open.
For the dedicated pest side, learn what a wood-destroying organism evaluation actually covers in our guide to termite and WDO inspections in San Diego. Pairing a thorough home inspection with a licensed pest report is the smartest way to avoid an expensive surprise after move-in.
Have questions about what we found during your inspection or what to do next? Call The Real Estate Inspection Company at (619) 752-4399, and we’ll help you understand the findings so you can line up the right specialists.
