Rat Damage Repair Cost: Insulation, Wiring, and Structural Fixes (2026)

Damage repair often costs more than the extermination itself. Attic insulation replacement runs $2,000-$4,000. Full attic remediation reaches $3,000-$9,000. Wiring repair adds $200-$1,500. Here is what to expect.

Cost by Damage Type

Damage Type	Cost Range	When Needed	Who Fixes It
Attic sanitization only	$300 - $600	Mild attic activity, no insulation damage	Pest control company
Partial insulation removal and replacement	$1,500 - $3,000	Localized attic damage with contamination	Attic remediation specialist
Full attic remediation	$3,000 - $9,000	Severe attic infestation, widespread contamination	Attic remediation specialist
Electrical wiring repair	$200 - $1,500	Visible chew marks on wiring, arc damage	Licensed electrician
Drywall repair	$200 - $800	Access holes cut for inspection, gnaw damage to walls	General contractor
PVC pipe repair	$150 - $500	Chewed through supply or drain lines	Plumber
Structural repair (joists, beams)	$500 - $3,000	Significant gnaw damage to load-bearing wood	Structural contractor
Full remediation (worst case)	$3,000 - $9,000+	Severe, long-term attic infestation with structural damage	Multiple contractors

How Damage Costs Escalate Over Time

Week 1-2

Droppings and urine contamination only. No structural damage.

$0 damage repair

Month 1-2

Chew marks on wood trim, minor gnaw damage to non-structural elements.

$200 - $600

Month 3

Insulation nesting and contamination. Possible early wiring damage.

$800 - $2,500

Month 6

Significant insulation contamination. Wiring damage probable. Possible pipe gnawing.

$2,000 - $5,000

1+ year

Extensive insulation contamination. Structural gnaw damage. Fire risk from wiring. Full remediation required.

$4,000 - $9,000+

Fire Risk from Chewed Wiring

Rodents are estimated to cause 25% of unexplained house fires in the United States. Rats chew through electrical insulation to wear down their constantly growing teeth. Exposed copper wires in contact with attic insulation are a severe fire hazard.

Warning signs of wiring damage: Flickering lights or appliances, tripped breakers with no clear cause, burning smell near walls or in attic, discolored wall outlets, sparks when plugging in appliances.

Cost to fix: A licensed electrician charges $200-$1,500 depending on how many circuits were affected and the accessibility of the damage. In severe cases with widespread attic damage, rewiring can exceed $3,000.

Does Homeowners Insurance Cover Rat Damage?

Short answer: Usually no, but there are exceptions.

Most standard homeowners policies (HO-3 and HO-5) explicitly exclude damage caused by rodents, insects, birds, and vermin. Insurance companies classify infestations as a maintenance failure rather than a sudden, unexpected event.

Typically NOT covered

Extermination costs
Attic insulation replacement
Drywall repair from gnawing
Direct structural damage from rats

May be covered (secondary damage)

Fire damage from chewed wiring
Water damage from chewed pipes
Resulting mold from water damage
Check your specific policy

If you believe secondary damage may be covered: Document everything with photos before any cleanup. Get written estimates from contractors. File your claim promptly. Have a public adjuster review the claim if the insurance company denies it -- denial rates on rodent-adjacent claims are high but appeals sometimes succeed for secondary damage.

When to Get a Professional Damage Assessment

+You can smell a persistent ammonia odor (urine) in the attic or walls

+You found chewed wiring or have unexplained electrical issues

+Your energy bills have increased (sign of compromised insulation)

+You see water staining on ceilings without an obvious roof leak

+The infestation lasted more than 2-3 months before treatment

+Your exterminator found evidence of extensive nesting in the attic

Get a damage assessment from a contractor or attic specialist independent of your pest control company. Some pest control companies overstate damage to upsell remediation services. An independent assessment gives you a fair second opinion.

Frequently Asked Questions

Does homeowners insurance cover rat damage?

Most homeowners insurance policies exclude rodent damage as a maintenance or pest issue. Insurance companies view rat infestations as preventable. Exceptions exist: some policies cover secondary damage from rats, such as a house fire caused by rats chewing through electrical wiring, or water damage from chewed pipes -- but not the infestation itself or the extermination cost. Always document all damage thoroughly and review your policy's exclusions.

Can rats chew through walls?

Yes. Rats can chew through drywall, soft wood, plastic pipes, insulation, and even thin aluminum. Materials they cannot chew through include: heavy-gauge steel, copper, concrete, and thick galvanized metal. Their teeth grow continuously and must be worn down by gnawing, which motivates constant chewing behavior. A rat can create a significant entry hole in drywall within minutes.

How much does attic rat damage repair cost?

Attic rat damage repair costs $1,500 to $9,000 depending on severity. Sanitization only (no insulation removal): $300-$600. Partial insulation removal and replacement: $1,500-$3,000. Full attic remediation (remove all insulation, sanitize, deodorize, reinstall): $3,000-$9,000. Add $200-$800 if wiring was chewed and needs an electrician.

Is rat-damaged wiring dangerous?

Yes, extremely so. Rodents cause an estimated 25% of unexplained house fires in the US by chewing through electrical insulation. Exposed wires can arc and ignite nearby insulation material. If you find evidence of chewed wiring -- exposed copper, charred insulation, flickering lights, or tripped breakers -- call an electrician before continuing to use the circuits. Do not wait.