Buying an Older San Diego Home? Should a Termite Inspection Be Separate From the Home Inspection? (2026)

The short answer is yes, and here's why that matters more than it sounds.

A home inspection and a termite inspection are performed by differently licensed professionals, evaluate different scopes, use different methods, and produce different reports. In California, a home inspector is licensed under the Business and Professions Code and evaluates the overall condition of the building's major systems. A termite (WDO) inspector is a Branch 3 licensed pest control operator who specializes in identifying wood-destroying organisms, the damage they cause, and the conditions that attract them.

For a newer home in good condition, the general home inspector's observations about wood condition may be sufficient to flag whether a separate WDO inspection is warranted. For an older San Diego home (anything built before the mid-1990s), the WDO inspection isn't optional due diligence. It's the baseline. Decades of exposure to San Diego's year-round termite activity means the question isn't whether termites have ever been in the building. It's whether they're there now, how much damage they've done, and what it costs to address.

What the Home Inspector Checks vs. What the Termite Inspector Checks

The overlap between a home inspection and a WDO inspection is narrower than most buyers realize.

The home inspector evaluates accessible wood as part of the overall structural assessment. They note deteriorated wood, moisture conditions conducive to wood-destroying organisms, and any visible evidence of pest activity. If they see something concerning, they recommend a WDO inspection for further evaluation.

What the home inspector does not do: probe wood systematically for concealed termite damage, identify termite species, assess infestation activity level, determine treatment recommendations, or produce a Section 1 / Section 2 pest report that's recognized in California real estate transactions.

The termite inspector focuses exclusively on wood-destroying organisms. They probe accessible wood with pointed implements to detect internal damage. They check the full foundation perimeter for mud tubes. They examine the attic framing for drywood termite evidence. They inspect the crawl space (if accessible) for subterranean activity, moisture, and fungal damage. And they produce a report that categorizes findings into Section 1 (active infestations and infections requiring treatment) and Section 2 (conditions likely to lead to infestation or infection).

Evaluation Area	Home Inspector	WDO Inspector
Accessible wood condition	General assessment	Systematic probing for concealed damage
Termite species identification	Not in scope	Yes (drywood, subterranean, other WDOs)
Mud tube detection	May note if visible	Systematic exterior and crawl space check
Frass identification	May note if visible	Species-level identification of frass type
Attic framing evaluation for termites	General condition check	Targeted termite evidence search
Section 1 / Section 2 report	Not produced	Yes (standard for CA real estate)
Treatment recommendations	Not in scope	Yes (specific to species and extent)
Fungal damage assessment	May note visible decay	Evaluates wood decay as part of WDO scope

Why Older Homes Need Both

Older San Diego homes have had decades of exposure to both drywood and subterranean termites. The original wood framing, trim, and structural members have been in place for 30, 40, 50 or more years in neighborhoods like North Park, Normal Heights, Hillcrest, Kensington, Mission Hills, La Mesa, and El Cajon.

During those decades, the home has likely experienced multiple termite swarm seasons without treatment, had generations of drywood termites cycle through (a colony can persist for 15 to 20 years in a single piece of wood), had soil conditions around the foundation change due to landscaping, irrigation, and drainage modifications, and may have had prior termite treatments that addressed the active infestation but didn't repair all the structural damage.

The home inspector evaluates the home's current condition across all systems. The WDO inspector evaluates whether wood-destroying organisms are currently active, what prior damage exists, and what the treatment and repair scope looks like. An older home needs both evaluations because the systems and the organisms interact: moisture from a plumbing leak (found by the home inspector) creates conditions that attract subterranean termites (found by the WDO inspector). Roof damage (found by the home inspector) allows water into the attic framing (which the WDO inspector checks for drywood termites feeding on moisture-softened wood).

For more on how older San Diego homes present during inspections, our home inspection guide covers the full system evaluation.

The Section 1 / Section 2 Report

In California real estate transactions, the WDO report categorizes findings into two sections that have specific meanings for negotiation.

Section 1 identifies active infestations and infections (termite activity, fungal damage, wood-boring beetle activity). These are conditions that currently exist and currently require treatment or repair.

Section 2 identifies conditions likely to lead to infestation or infection if not corrected. Examples include earth-to-wood contact, excessive moisture in the crawl space, and damaged or missing crawl space ventilation.

The distinction matters for negotiation. Section 1 findings are active problems that most buyers expect the seller to address before closing (or credit the buyer for treatment cost). Section 2 findings are preventive items that the buyer may address post-purchase.

In competitive San Diego markets, buyers sometimes waive their right to negotiate on Section 2 findings but rarely waive Section 1. Knowing the difference and understanding what each section means for your budget is essential.

What Termite Damage Costs in Older Homes

The cost question in older homes isn't just treatment. It's treatment plus repair.

Item	Typical Cost Range	Notes
WDO inspection	$75 to $200	Often seller-paid in San Diego transactions
Localized drywood treatment	$500 to $2,500	Spot treatment or localized fumigation
Full-structure fumigation	$1,200 to $3,500+	Tenting, based on home size
Subterranean soil treatment	$800 to $2,500	Liquid treatment around foundation
Structural wood repair (minor)	$500 to $2,000	Replace localized damaged members
Structural wood repair (major)	$2,000 to $10,000+	Multiple structural members, sistering, framing
Fungal damage remediation	$1,000 to $5,000	Remove and replace affected wood

Costs reflect San Diego County general ranges. Actual costs depend on species, extent, accessibility, and contractor.

In older homes where termite damage has been accumulating for decades without treatment, the repair costs can exceed the treatment costs by a significant margin. A home that needs $1,500 in fumigation but $8,000 in structural wood repair to address the damage the termites caused over 20 years is a different financial picture than the treatment cost alone suggests.

How 360's Home Inspection Connects to the WDO Evaluation

During our standard home inspection, we evaluate the building's wood components, moisture conditions, and any visible evidence of pest activity. When we find conditions that suggest possible termite concerns (deteriorated wood, moisture in the crawl space, wood-to-soil contact, stucco damage that could allow water behind the wall), we document them and recommend a separate WDO inspection by a licensed Branch 3 operator.

We're home inspectors. The WDO inspection is a separate specialty with its own license, methodology, and reporting requirements. What we provide is the building-system context that helps the WDO inspector understand what else is going on in the home: where the moisture is, where the ventilation gaps are, and where the structural conditions connect to pest risk.

For older homes, we typically recommend scheduling both the home inspection and the WDO inspection during the same week of the contingency period so the findings can be evaluated together.

Schedule online or call (858) 707-7066.

Frequently Asked Questions

Q: Is a termite inspection separate from a home inspection?

Yes. In California, a home inspection is performed by a licensed home inspector who evaluates all major building systems. A WDO (termite) inspection is performed by a licensed Branch 3 pest control operator who specializes in wood-destroying organisms. They have different scopes, methods, and reporting formats.

Q: Why do older homes need a separate termite inspection?

Older homes have had decades of exposure to termite activity. Concealed damage inside walls, attic framing, and crawl space components requires the specialized probing and species identification that a WDO inspector provides. A home inspector can identify conditions conducive to termites but doesn't perform the targeted evaluation.

Q: Who pays for the termite inspection in San Diego?

In most San Diego real estate transactions, the seller pays for the WDO inspection and provides the report. However, this is negotiable. Buyers can also arrange their own independent WDO inspection for $75 to $200.

Q: What are Section 1 and Section 2 findings?

Section 1 identifies active infestations and infections that currently require treatment. Section 2 identifies conditions likely to lead to infestation if not corrected. Section 1 findings are typically negotiated for seller repair or credit. Section 2 findings are often addressed by the buyer post-purchase.

Q: How long does a WDO inspection take?

A standard residential WDO inspection takes 30 to 90 minutes depending on the home's size, accessibility, and complexity. Older homes with crawl spaces and attic access may take longer.

Q: Can the same person do both the home inspection and termite inspection?

In California, some individuals hold both a home inspector license and a Branch 3 pest control license. However, many buyers prefer separate inspectors for each scope to ensure independence. Most home inspectors recommend a separate WDO inspection when termite concerns are identified.

Q: What if the termite report shows old damage but no active infestation?

Old damage without current activity is common in older homes that were previously treated. The damage still affects the structural integrity of the wood. The WDO report documents the damage, and a contractor can evaluate whether repair is needed based on the extent and location.

Q: Should I schedule the home inspection and termite inspection at the same time?

Scheduling them during the same week is ideal so findings can be evaluated together. Some buyers schedule them on the same day, though they're performed by different professionals. Coordination helps you make informed decisions within your contingency period.

Q: Can termite damage be a deal-breaker on an older home?

It depends on the extent. Localized damage with a clear treatment path is manageable and common in older San Diego homes. Extensive structural damage requiring major framing repair can significantly affect the property's value and may warrant renegotiation or walking away.

Q: Does prior termite treatment mean the home is clear?

Not necessarily. Prior treatment addressed the active infestation at that time. New infestations can develop from subsequent swarm events, and the prior treatment may not have addressed all colonies. A current WDO inspection confirms whether the home is currently clear.

Two Inspections, Two Answers

The home inspection tells you about the building. The WDO inspection tells you about what's eating it. For a newer home in good condition, the home inspection may be enough to determine whether a WDO evaluation is needed. For an older San Diego home, both are standard practice, and skipping the WDO is a gamble that rarely pays off in a market where termites have been active for as long as the houses have been standing.

Schedule both. Read both reports. Make your decision with complete information.

Cost estimates in this article reflect general ranges for the San Diego County market as of 2026. Treatment and repair costs vary by species, extent, and contractor.