Worth FixingEnvironmental

Termite / Wood-Destroying Insect Damage

National Average Repair Cost

$1.0K - $4.5K

In This Article

1. What Is This Issue?
2. What Happens If You Ignore It
3. Repair Costs by Region
4. Is This a Deal Breaker?
5. How to Negotiate
6. Frequently Asked Questions

What Is This Issue?

Wood-destroying insects, commonly referred to as WDIs, include termites, carpenter ants, powderpost beetles, and wood-boring bees. These pests view the structural framework of a home, including wall studs, floor joists, and subflooring, as either food or a place to tunnel and nest. When a home inspector flags WDI damage, it means they have found visible evidence of these insects, such as mud tubes running along the foundation, discarded wings near windows or doors, sawdust-like droppings called frass, or wood that sounds hollow when tapped. The two most common types of termites are subterranean termites, which live in the soil and build mud tubes to reach the wood in your home, and drywood termites, which live entirely inside the dry wood of the house itself, typically in attic trusses and framing, with no soil contact required.

What Happens If You Ignore It

If left unchecked, wood-destroying insects will literally consume a house from the inside out. Structural framing that supports the roof, walls, and floors can become so weakened that it buckles, warps, or in extreme cases collapses. What might start as a $1,000 pest control treatment can escalate into a $30,000 or more structural reframing project if the infestation goes unaddressed for years. Termites work silently and invisibly inside walls, so significant damage can accumulate before any exterior signs become apparent. A mature subterranean termite colony can consume several pounds of wood per month, with large Formosan colonies capable of consuming over a pound per week. The damage is cumulative and irreversible: once the structural wood is eaten, it must be reinforced or replaced even after the termites are eliminated.

Repair Costs by Region

West Coast$1,500–$6,500
Northeast$800–$3,500
South$1,200–$5,000
Midwest$800–$3,000

Region	Low Estimate	High Estimate
West Coast	$1,500	$6,500
Northeast	$800	$3,500
South	$1,200	$5,000
Midwest	$800	$3,000

Treatment method is the primary cost driver. Tenting, also called fumigation, costs $1,500 to $4,000 or more and is required for severe or widespread infestations, particularly drywood termites that live inside the wood rather than the soil. The entire house is sealed in a canvas tent and filled with lethal gas, and occupants must vacate for 3 to 5 days. Spot treatment using liquid termiticide like Termidor involves drilling into the foundation or trenching the perimeter and injecting a chemical barrier, costing $500 to $1,500. Bait stations cost $400 to $1,000 for installation plus $200 to $400 per year in ongoing monitoring fees and are best for long-term prevention. Structural repair costs vary enormously: sistering a few damaged joists might run $500 to $2,000, while extensive reframing can cost $10,000 or more. The linear footage of the home's perimeter, foundation type, termite species, and severity of existing structural damage all affect the final price.

Repair Timeline

Bait station installation and spot treatment are same-day procedures, typically completed in a few hours. Tenting and fumigation requires 3 to 5 days, during which all people, pets, and plants must vacate the home. Structural repairs range from 2 days for minor reinforcement to several weeks for extensive reframing. If the home requires both fumigation and structural repair, plan for the fumigation first, followed by carpentry work once the home is cleared for re-entry.

DIY vs Professional

Do not attempt to treat termites yourself. Structural pest eradication requires commercial-grade chemicals that are not available to consumers, specialized equipment to drill into concrete slabs, and the expertise to ensure complete colony elimination. DIY treatments risk missing sub-colonies that continue causing hidden structural damage while giving you a false sense of security. Most states also require a licensed pest control operator for termite treatment, and lenders require a professional WDI clearance letter.

Is This a Deal Breaker?

Usually not.

Active termites are common, especially in warm and humid climates across the southern and western United States. Finding termite evidence is not automatically a reason to walk away. It becomes a deal-breaker only if the structural damage is catastrophic and the seller refuses to provide a meaningful credit or pay for treatment, or if the inspection reveals that damage has compromised critical structural elements like load-bearing beams or the foundation sill plate to a degree that makes repair impractical.

Insurance Impact

Standard homeowners insurance does not cover termite damage under any circumstances. It is classified as a preventable maintenance issue rather than a sudden or accidental peril. This means you bear 100 percent of the financial responsibility for treatment and repair from the moment you take ownership. This fact is a powerful negotiation point because you are taking on uninsurable risk.

Mortgage Impact

FHA, VA, and USDA loans typically require a clear Wood-Destroying Insect report before the loan can be funded. If active termites or significant damage are found, the loan will not close until treatment is completed and any necessary structural repairs are made. Conventional loan appraisers may also flag visible damage and require a WDI report and subsequent treatment as a condition of closing. This gives buyers significant leverage because the seller must address the issue regardless of who is buying the home.

How to Negotiate

Never let the seller choose the pest control company or repair contractor. They will select the cheapest and fastest option, which may mean a superficial treatment and cosmetic patching that hides ongoing damage. Get quotes from reputable, licensed pest control companies and structural contractors, then request a seller credit at closing or a price reduction so you control the quality of the work. If your lender requires the issue to be resolved before closing, stipulate in the purchase addendum that the work must be performed by a licensed contractor of your choosing.

Talking Points

Our lender requires a clear WDI report before they will approve the loan, so this issue must be addressed regardless. A credit allows us to manage the process efficiently.
Visible termite damage often conceals deeper structural issues behind walls. This credit covers the known treatment plus the very real risk of discovering additional framing damage once repairs begin.
Standard homeowners insurance does not cover termite damage, which means we are absorbing 100 percent of the ongoing risk the moment we close. The credit reflects that uninsurable exposure.
We have obtained two professional quotes for treatment and structural repair, and the credit we are requesting is based on the average of those documented estimates.

Have an inspection report with this issue?

Upload your full PDF. BidNest AI analyzes every issue, estimates localized repair costs, and generates 3 negotiation scenarios with talking points — in under 5 minutes.

Analyze Your Report — $49

Frequently Asked Questions

The report says the damage is old and inactive. Can I just ignore it?

No. Even if the insects are no longer active, the structural integrity of the damaged wood may be compromised. Have a licensed structural contractor or engineer evaluate whether the previously damaged wood needs to be reinforced through sistering, which means attaching new wood alongside the damaged piece, or replaced entirely. Old damage that weakened a floor joist or sill plate does not heal itself and will continue to be a weak point in the structure.

Will a standard home inspection catch all termite damage?

Usually not comprehensively. A general home inspector performs a visual scan of accessible areas, but wood-destroying insects hide inside walls, under floors, and in spaces that cannot be seen without invasive inspection. Always hire a dedicated, licensed pest inspector who specializes in WDI detection and knows what subtle signs to look for, including frass, mud tubes, pin holes, and hollow-sounding wood in less obvious locations.

The house has a concrete slab foundation. Am I safe from termites?

No. Subterranean termites only need a crack one-thirty-second of an inch wide in the concrete slab to enter your home and reach the wood framing inside the walls. They can also enter through expansion joints, plumbing penetrations, and the gap where the slab meets the foundation wall. Slab construction does not provide termite immunity.

The seller provided a termite bond. Does that mean I am fully protected?

Read the fine print very carefully. A retreatment bond only guarantees that the pest control company will come back and spray again for free if termites return, but it does not cover any structural damage caused by the new infestation. A repair bond is significantly more valuable because it covers the cost of repairing new structural damage if the treatment fails. Also verify whether the bond is transferable to a new homeowner and what the annual renewal fee is.

What is the difference between subterranean and drywood termites?

Subterranean termites live in the soil, require moisture, and build distinctive mud tubes to travel from the ground up to the wood in your home. They are best treated with soil chemical barriers or bait stations. Drywood termites live entirely inside the dry wood of your house, typically in attic trusses and framing, and require no soil contact at all. Because they are living inside the wood throughout the structure, they frequently require whole-house tent fumigation to eradicate rather than targeted ground treatments.