Overview
Roof rats are the other rat species found in New York City — smaller, sleeker, and dramatically better climbers than Norway rats. Where Norway rats dominate the underground and ground-level infrastructure of the city, roof rats occupy the upper floors, attics, cornices, rooflines, and tree canopies of outer-borough residential neighborhoods.
Roof rats are more common than most NYC residents realize because they nest in spaces that aren't regularly visible. An attic infestation, a cornice nest on the fourth floor, a roof vent colony — these don't produce the same obvious street-level evidence as a Norway rat burrow under a stoop. By the time scratching sounds in the ceiling or attic become noticeable, a colony is typically well established.
The distribution of roof rats in NYC follows the tree canopy. Neighborhoods with significant street tree cover and detached or semi-detached housing — Forest Hills, Bayside, and eastern Queens broadly; the north shore of Staten Island; parts of Riverdale in the Bronx; and suburban-style outer Brooklyn neighborhoods — see disproportionate roof rat activity. Roof rats use tree branches as access routes to rooflines, then find their way into attics through damaged soffits, open ridge vents, or gaps around pipe penetrations through the roof.
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Call Now: (212) 555-0123Identification
Size
6–8 inches body length with a tail notably longer than the body at 7–10 inches. Adults weigh 5–12 oz — lighter and more slender than Norway rats.
Color & Coat
Black to dark brown on the back, with a lighter brown, gray, or cream underside. Coat is smoother and less shaggy than Norway rats. The pointed muzzle and large ears relative to head size distinguish them from Norway rats at a glance.
Behavior
Agile climbers that prefer elevated nesting sites — attics, cornices, rooflines, tree canopies, and upper floors. Almost never found burrowing. Highly mobile along fence lines, utility wires, and tree branches. More cautious than Norway rats and harder to trap because of neophobia (fear of new objects in their environment).
Droppings
1/2 inch spindle-shaped with pointed ends — longer and more slender than mouse droppings, noticeably smaller than Norway rat droppings. Found in elevated spaces: attic insulation, along ceiling joists, near roof vents.
Signs of Infestation
Scratching and running sounds in attic spaces at night — lighter and faster than Norway rat sounds, often described as pattering
Droppings in attic insulation, along upper-floor ceiling edges, or near roof penetrations
Gnaw marks around roof vent openings, soffit edges, and any wood trim at the roofline
Grease marks along fence tops, utility wire supports, or upper-story ledges from repeated travel routes
Damaged or missing soffit sections, especially near corners and gable end vents
Tree branches in contact with rooflines — the access route most roof rat infestations use
Nesting materials (insulation, shredded paper, plant material) concentrated in attic corners or near vents
Direct sightings on utility wires, fence tops, or in tree canopies at dusk
Where They Live in NYC
Roof rats are concentrated in outer-borough residential areas with significant tree cover and detached or semi-detached housing — the conditions that give them both the overhead access routes and the attic nesting spaces they prefer.
In Queens, Forest Hills and Kew Gardens have consistently high roof rat activity, driven by mature street tree canopies that provide direct access to rooflines. Bayside, Fresh Meadows, and Jamaica Estates in eastern Queens — neighborhoods with detached single-family homes and large lot trees — see regular roof rat activity in attic spaces. Ridgewood and Middle Village, with their dense rowhouse stock and backyard tree coverage, report roof rat activity primarily at upper floors and cornices.
On Staten Island, roof rats are more broadly distributed than anywhere else in the five boroughs. The suburban character of the island, the significant tree cover across residential neighborhoods from St. George to Tottenville, and the abundance of detached and semi-detached housing with attic spaces make Staten Island the borough with the highest roof rat density. Great Kills, New Dorp, and the New Springville area report consistent attic infestations.
In the Bronx, Riverdale stands out for roof rat activity — the elevated terrain, mature trees, and large single-family homes with finished attics create near-ideal roof rat habitat within the city. Parts of Pelham Bay near the park edge also see elevated activity.
In Brooklyn, roof rat activity concentrates in neighborhoods with remaining detached housing stock — Bay Ridge, Dyker Heights, and Marine Park — where tree-lined streets meet rooftop-accessible homes. Upper-floor row house infestations in areas like Prospect Heights and Crown Heights occasionally involve roof rats using fire escapes and cornices as access routes.
Manhattan has comparatively lower roof rat activity because of the building density and height — roof rats prefer connected low-rise housing where tree access to rooflines is consistent. The few remaining low-rise residential blocks in northern Manhattan near Inwood Hill Park and Fort Tryon see occasional activity.
Health Risks
Salmonella through contamination of food storage areas and food preparation surfaces with droppings and urine
Leptospirosis via contact with urine contaminating water sources, particularly in basements and crawl spaces connected to attic access routes
Murine typhus transmitted through flea bites from fleas carried by roof rats
Food contamination in attic-adjacent pantries and storage areas where roof rats enter through ceiling voids
Structural damage risk from gnawing on electrical wiring in attic spaces — a documented fire risk in severe infestations
Secondary parasite transfer when roof rat populations are disturbed — fleas and mites move to available hosts after colony disruption
How We Treat Roof Rats
Roof rat treatment starts at the roofline, not the ground. Our inspection assesses every upper-story and roofline access point — soffit condition, ridge vent screen integrity, gable vents, pipe penetrations through the roof deck, and any point where tree branches provide direct roofline contact.
Exclusion at the roofline is the critical step. Open or damaged soffit sections get hardware cloth installed or existing material repaired. Ridge vents and gable vents get screen inspection and replacement where integrity is compromised. Pipe penetrations through the roof get copper mesh and appropriate sealant. Tree branches within 3-4 feet of the roofline are a recommended trim — not something we do, but something we strongly advise before treatment because roof rats reaccess the roof via the same branch routes even after interior exclusion.
Interior attic treatment addresses the active colony. Snap traps and bait stations are deployed in the attic space along confirmed travel routes identified by rub marks, droppings concentrations, and nesting evidence. Roof rat neophobia — their wariness of new objects — means that trap placement precision and pre-baiting (letting traps sit unset for several days to acclimate the population) often improves capture rates significantly over immediate deployment.
Nest removal and attic cleanup are recommended after the colony is eliminated. Roof rat nests in attic insulation can harbor fleas, mites, and disease-laden organic material. We recommend disturbed insulation be HEPA-vacuumed and replaced as part of post-treatment cleanup, which we can coordinate though don't always perform ourselves.
Follow-up visits confirm roofline exclusion integrity, check trap and bait station activity, and verify that the attic sounds have stopped before the job is closed.
Free Inspection
Species identification is step one. Our inspection confirms exactly what you have before any treatment is planned.
Call Now: (212) 555-0123Related Services
Rat Extermination
Full-service rat elimination built around exclusion, baiting, and targeted trapping.
Learn MoreRodent Exclusion
Sealing every gap, pipe penetration, and foundation crack so rodents can't come back.
Learn MoreRodent Inspection
Full property inspection identifying species, entry points, and infestation severity before any work starts.
Learn MoreFrequently Asked Questions
How did roof rats get into my attic?+
The most common routes are tree branches touching or overhanging the roofline (roof rats run these like bridges), damaged or missing soffit sections, open or unscreened gable vents, ridge vents with deteriorated screening, and pipe penetrations through the roof deck. Our inspection will identify the specific access point.
I hear scratching in my ceiling but I'm on the top floor. Is it roof rats?+
Top-floor ceiling sounds strongly suggest roof rats using the attic or ceiling void space above. Norway rats rarely occupy spaces above the ground floor. The pattern of noise — lighter, faster, often pattering compared to Norway rat sounds — combined with the location is usually diagnostic. We can confirm with an inspection.
Can roof rats damage my electrical wiring?+
Yes. Gnawing on electrical wiring is a documented behavior of roof rats in attic spaces, and it is a documented fire risk. Chewed wiring in attics from rodent activity is an insurance claim and fire investigation finding. If you have a significant attic infestation, having the wiring in the attic inspected after treatment is a reasonable precaution.
Why are roof rats harder to trap than Norway rats?+
Roof rats exhibit stronger neophobia — fear of new objects in familiar environments. A snap trap placed in an attic may sit ignored for several days while the population adjusts to its presence. Pre-baiting (leaving an unset trap with bait for several days before setting it) typically improves capture rates significantly. We account for this in our treatment approach.
Do you cut the tree branches near my roof?+
We don't perform tree trimming, but we strongly recommend it as part of the exclusion process for roof rat jobs. Branches within 3-4 feet of the roofline are the primary access route for most roof rat infestations. Trimming them back removes the bridge and is one of the most effective preventive steps you can take independently.
Are roof rats dangerous to handle?+
Any rat bite can transmit disease. Beyond the bite risk, disturbing a roof rat colony and their nesting materials can release fleas and mites into the surrounding space. We recommend not handling any captured rats yourself and allowing us to manage removal. If you have disturbed nesting materials in an attic, avoid working in that space without a mask and gloves until the area is assessed.
Think You Have Roof Rats?
Our inspection confirms the species and maps every entry point before any treatment plan is made.
Call Now: (212) 555-0123Free Inspection · 24/7 Availability · All 5 Boroughs