If you've seen one mouse in an NYC apartment, the honest answer is that there are more you haven't seen — a house mouse rarely travels more than 10 to 30 feet from its nest, so a sighting in the kitchen means the nest is close, usually inside a wall void, behind a cabinet kick plate, or under an appliance. Mice are small enough to compress through a gap about the width of a dime, which is why the pipe penetration under your sink or the space behind your stove's utility conduit is doing more to cause your mouse problem than anything happening outside the building.
Our mouse programme starts with a real inspection, not a guess: fresh droppings (dark, moist, pointed) versus old ones (grey, chalky) tell us whether activity is current; a UV light run along baseboards and cabinet interiors picks up urine trails invisible in normal light; grease marks along a runway confirm the route. From there we place snap traps in pairs, flush to the wall, at the actual activity points — not scattered around the room — because mice are curious and investigate new objects within hours, which makes trapping far more effective for mice than it is for rats.
Exclusion is what actually stops the problem from coming back. We pack copper mesh around pipe and conduit penetrations, install galvanised hardware cloth over gaps too large to patch, and seal the kick-plate and vanity-base voids mice use as highways between your kitchen, bathroom and the wall cavity. In pre-war and pre-1970s NYC buildings, shared risers running through every floor mean an unsealed unit two floors down can be feeding mice into your apartment — which is why we look at the building's entry points, not just yours.
How much does mouse extermination cost in NYC?
$150–$1,200
Inspection: $75–$125. One-time treatment: $150–$550 (national avg ~$377–$525 depending on source). Yearly contract: $200–$450. Quarterly contract: $450–$900. Monthly contract: $800–$1,200.
| Inspection | $75–$125 one-time |
| One-time treatment | $150–$550 one-time |
| Yearly contract | $200–$450 per year |
| Quarterly contract | $450–$900 per year |
| Monthly contract | $800–$1,200 per year |
US national figure — NYC typically runs higher.
Market range — not our quote
This is a market range synthesised from published cost guides — not a quote from this provider. The actual price depends on an in-person or photo-based inspection.
US national figures — NYC typically higher (no NYC-specific mice-only cost guide found; NYC data exists for rats but not mice separately). Bob Vila's $150–$200 figure is notably lower than Fixr's $300–$550 one-time-treatment figure — genuine source disagreement, not a typo.
What drives the price
- Method (traps $250–$650, poison $300–$500, bait stations $450–$650, fumigation $2,000–$6,000, all for a ~2,000 sq ft home)
- Home/apartment size
- Infestation severity (small $250–$500 vs severe $1,000–$5,000)
- Number of entry points needing sealing
Signs you have a mouse extermination problem
- Small, dark, rice-grain droppings (3–6mm) in drawers, under the sink, or along cabinet edges
- Scratching sounds inside walls or under the floor, usually at night
- A gnawed corner on food packaging, cardboard, or a baseboard
- A faint, musky, ammonia-like smell concentrated in one room
- A live mouse seen darting along a wall or under an appliance — always a sign of more you haven't seen
Why New York sees this
Pre-war buildings and brownstones have lathe-and-plaster walls with hollow cavities connecting unit to unit, and pipe chases with no fire- or pest-stopping between floors — which is why a mouse problem on the ground floor often shows up two or three floors up within weeks.
Autumn (September through November) is peak mouse-entry season in NYC as outdoor populations move toward heated buildings, but because a heated apartment offers stable food, warmth and water year-round, an established indoor population keeps breeding through winter regardless of the season outside.
In a multi-unit building, single-apartment mouse treatment is frequently wasted money — if your neighbour's unit or the building's shared basement stays untreated, mice simply move back in through the same riser gaps. We flag this to tenants and property managers up front.