Expert Squirrel Removal & Control in Denver, CO
Denver’s urban canopy — thousands of mature cottonwoods, oaks, and pines — makes the Mile High City a squirrel haven. Eastern fox squirrels and the occasional Abert’s squirrel thrive in City Park, Washington Park, and your backyard. But when temperatures drop to a winter low of 19°F or during the two annual breeding seasons, these agile rodents seek warmth and safety in the one place you don’t want them: your attic.
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squirrels in your attic? Denver’s urban trees and semi-arid climate drive them indoors for warmth and breeding. Professional removal uses one-way exclusion doors, sealing gaps, and repairs — typically $250-$1,500. Call 888-546-7983 for a inspection terms that vary by provider.
Key Takeaways
- →squirrels enter through gaps as small as 1.5 inches; Denver’s older homes are vulnerable.
- →They gnaw on wiring, creating fire hazards — a leading cause of attic fires per industry estimates.
- →One-way exclusion doors are the standard humane removal method; never seal animals inside.
- →Peak invasion seasons align with two breeding cycles: late winter/spring and late summer/fall.
- →Professional exclusion + repair in Denver averages $600-$1,200; inspection and quote terms vary by provider.
Professional squirrel exclusion starts with a thorough inspection of your roofline.
Who This Is For
This page is for Denver homeowners, property managers, and landlords who hear scratching in the ceiling, find droppings in the garage, or notice gnawed soffits. If you own a single-family home, duplex, or small apartment building — especially with large trees near the roofline — you’re in the right place. We’ll cover what works in Denver’s semi-arid climate, what professional removal costs, and how to keep squirrels out for good.
The Problem
squirrels are not just a nuisance — they cause real damage. Their incisors grow continuously, so they gnaw on wood, drywall, and electrical wiring. The National Fire Protection Association (NFPA) notes that rodents are a factor in an estimated 20% of undetermined residential fires. In Denver’s dry climate, a spark from chewed wiring can be catastrophic. Additionally, squirrel urine and droppings contaminate insulation, creating odors and potential health risks (histoplasmosis is rare but possible).
Warning Signs
- •Scratching, scampering, or thumping sounds in the attic, especially at dawn and dusk.
- •Droppings: oblong, 3/8 inch, dark brown — often found near entry points or in insulation.
- •Gnaw marks on wooden beams, soffits, fascia boards, or electrical cables.
- •Visible entry holes: gaps around rooflines, vents, or eaves, often with greasy rub marks.
- •Nests made of leaves, twigs, and insulation in attic corners or near vents.
- •Strange odors from urine accumulation in insulation.
- •Squirrel sightings on the roof or near attic vents during daytime.
Risks of Waiting
- ⚠Fire hazard: Chewed wiring can cause short circuits and attic fires.
- ⚠Structural damage: Gnawing weakens wooden supports and drywall.
- ⚠Insulation destruction: Urine and nesting ruin R-value, increasing energy bills.
- ⚠Secondary infestations: Open entry points invite bats, birds, or raccoons.
- ⚠Health concerns: Droppings may carry leptospirosis or salmonella.
Do you have a squirrel problem?
Treatment Options
One-Way Exclusion Door Installation
$300-$600A professionally installed one-way door allows squirrels to exit but not re-enter. After all animals are out, the entry is permanently sealed.
Full Exclusion & Repair Package
$800-$1,500Inspection, sealing all gaps (≥1.5 inches) with heavy-gauge steel mesh or sheet metal, repair of damaged soffits/fascia, and installation of chimney caps and vent screens.
Attic Restoration & Insulation Replacement
$1,000-$2,500Removal of contaminated insulation, sanitization with enzyme cleaners, and installation of new fiberglass or cellulose insulation. Often bundled with exclusion.
Why Denver’s Climate and Homes Attract squirrels
Denver sits at 5,280 feet in a semi-arid zone with just 14 inches of annual rainfall. Summers are hot (88°F average high) and winters cold (19°F average low). squirrels need shelter from both extremes. Older Denver homes — especially those built before 1950 — often have gaps under eaves, loose soffits, and uncapped chimneys that provide easy access. The city’s tree canopy, managed by Denver Parks and Recreation, includes many mature oaks and cottonwoods that produce acorns and seeds, a primary food source. This combination of abundant food, shelter, and moderate climate (compared to the mountains) supports a dense urban squirrel population.
Humane Removal: How One-Way Exclusion Works
One-way exclusion doors are the gold standard for humane squirrel removal. A professional installs a lightweight, one-way door over the main entry point. The door is angled so squirrels can push out but cannot re-enter. Over 7–14 days, all squirrels exit to forage. The technician returns to remove the door and permanently seal the opening with galvanized steel mesh or sheet metal, secured with screws and construction adhesive. This method avoids killing squirrels (which is illegal in many states) and prevents orphans left behind. After exclusion, the technician checks for secondary entry points and seals them.
The Fire Risk: Why Squirrel Gnawing Is Dangerous
squirrels’ incisors grow 6 inches per year, so they must gnaw constantly to wear them down. In attics, they target wood, drywall, and — most dangerously — electrical wiring. The National Fire Protection Association (NFPA) reports that rodents cause an estimated 20% of undetermined structure fires in the U.S. each year. In Denver’s dry climate, where humidity averages 52%, chewed wires can arc and ignite nearby insulation or wood framing. This risk is a key reason why insurance companies often require proof of professional exclusion before covering rodent-related damage.
How Denver Properties Should Prepare for squirrel Service
Before a professional visit in Denver, CO, clear access to baseboards, utility areas, kitchens, bathrooms, garages, crawl spaces, and any location where activity has been seen. Take photos of sightings, save damaged materials when safe, and note when the problem is most active. This helps the technician confirm the species, find nesting or entry points, and choose a treatment plan that matches the property instead of relying on a generic spray-and-leave visit.
Questions to Ask Before Booking squirrel Control
Ask whether the inspection is included, what treatment methods are being proposed, how follow-up visits are handled, and what conditions could change the price. For rental properties, restaurants, hotels, warehouses, and multi-unit buildings, ask whether documentation is provided after service. Strong providers explain the source of the problem, the treatment area, safety instructions, and prevention steps in plain language before work begins.
What Makes Denver squirrel Problems Different
Denver, CO properties can have different pest pressure from block to block because of building age, landscaping, moisture, trash handling, nearby food sources, and how tightly entry points are sealed. A good inspection does not assume every property needs the same service. It checks the structure, surrounding conditions, activity level, and safety needs before recommending treatment.
Inspection Steps for squirrel Issues
A complete inspection should look at interior activity, exterior entry points, moisture conditions, food or harborage sources, nearby vegetation, storage areas, and any connected units or shared walls. The best inspection notes where activity is confirmed, where it is suspected, and what needs to change after treatment so the same issue does not return quickly.
Follow-Up and Prevention Plan
Professional pest control should not stop at one visit when the infestation risk is ongoing. Follow-up timing depends on the pest, severity, season, property type, and whether sanitation or exclusion work is still needed. A practical prevention plan may include sealing entry points, improving drainage, trimming vegetation, changing storage habits, and monitoring activity after service.
Squirrel Control Options Compared
| Method | Best For |
|---|---|
| One-Way Exclusion Doors | Active infestations — humane, removes all animals. |
| Full Exclusion & Repair | Prevention after removal or for multiple entry points. |
| Attic Restoration & Insulation | Heavily soiled attics — restores insulation and air quality. |
| DIY Trapping + Sealing | Small, confirmed single-squirrel issues — risk of trapping animals inside. |
What Affects Cost
- ✓Number of entry points: More gaps mean more materials and labor.
- ✓Roof complexity: Steep pitches or multiple rooflines increase time.
- ✓Attic accessibility: Crawl spaces vs. walk-up attics affect ease of work.
- ✓Insulation type and contamination level: Blown-in insulation is harder to replace than batts.
- ✓Local labor rates: Denver’s cost of living drives service prices above national average.
- ✓Season: Spring and fall are busiest; prices may be slightly higher.
- ✓Warranty or guarantee: Many companies include a 1-5 year exclusion warranty.
What is your biggest concern with squirrels in your attic?
When to Call a Professional
Call a professional as soon as you hear persistent scratching or find an active entry hole. squirrels breed twice a year — February–April and August–October — and a single female can produce 2–8 young per litter. Waiting even a few weeks can turn a single squirrel into a family. Professional exclusion is the only way to ensure all animals are out and entry points are sealed permanently.
DIY vs Professional
DIY squirrel control is tempting but rarely effective long-term. Sealing a hole while squirrels are inside traps them, leading to death and odor. One-way doors require precise installation to work reliably. Professionals use heavy-gauge materials (steel mesh, not hardware cloth) and know Denver’s building codes for vent caps. The cost of DIY mistakes — fire damage, re-infestation, or attic cleanup — often exceeds the cost of professional service. For a one-time fix with a guarantee, hiring a pro is the smarter investment.
Local Context
Denver’s urban layout — with tree-lined streets, parks, and older neighborhoods like Capitol Hill, Washington Park, and Highland — creates ideal squirrel habitat. The city’s semi-arid climate means attics are dry and warm, perfect for nesting. Homes with brick exteriors and wooden trim are especially vulnerable because gaps often form where materials meet. Denver’s median home value of $590,000 reflects many older homes that haven’t been fully weatherized. Local pest control companies report a surge in squirrel calls during the two breeding seasons: late winter (February–April) and late summer (August–October). During these times, mothers seek safe, warm attics to birth and raise litters. If you hear scratching during these months, act fast.
Prevention Tips
- ✓Trim tree branches to at least 10 feet from your roofline — squirrels leap from branches.
- ✓Install chimney caps with steel mesh and cover all attic vents with 1/4-inch hardware cloth.
- ✓Seal gaps around utility lines, pipes, and eaves with caulk or steel wool.
- ✓Inspect your roof annually for loose shingles, rotting fascia, or gaps in soffits.
- ✓Remove bird feeders or place them on poles far from the house — squirrels see them as a food source.
- ✓Secure garbage cans with locking lids and clean up fallen fruit or nuts from your yard.
- ✓Consider a motion-activated sprinkler to deter squirrels from approaching your home.
💡 Did You Know?
- ★squirrels use a clever trick called 'deceptive caching' — they dig a hole, pretend to bury a nut, then cover it up while actually hiding the nut in their mouth or another spot.
- ★squirrels can rotate their ankles 180 degrees, allowing them to sprint down trees headfirst — a skill that helps them escape predators.
- ★a squirrel’s front teeth never stop growing; if they didn’t gnaw constantly, their teeth would grow into their skull.
Frequently Asked Questions
How do I know if I have squirrels in my attic?
Can I just seal the hole and trap them inside?
How much does squirrel removal cost in Denver?
Are squirrels dangerous to my home?
How long does it take to get rid of squirrels?
What should I do during peak squirrel season?
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Reviewed by ai-pipeline · Updated 2026-06-17T22:55:27.083Z
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