There's a meaningful difference between removing rodents that are already inside and proofing a property so they never get the chance. Rodent proofing is the preventative, materials-driven half of the job: a systematic audit of every gap, crack, and penetration a rat or mouse could use, sealed with materials they physically cannot chew through, done whether or not you currently have an active problem.
A mouse can compress through a gap the width of a dime; a rat needs only a gap the width of a quarter. That means the list of places we check is longer than most property owners expect — pipe and conduit penetrations under sinks and behind appliances, foundation cracks and weep holes at grade, basement bulkhead door hinges and thresholds, the space where a floor joist pocket meets an exterior brownstone wall, roof and attic vents, and gaps at the base of exterior doors that paint cycles and settlement have quietly widened over decades.
Materials matter as much as finding the gaps. Expanding foam and standard caulk alone do not stop a rodent — both mice and rats gnaw through them without much effort. We use 19-gauge galvanised steel mesh for anything structural, copper mesh packed tight into irregular gaps around pipes and conduit, and hydraulic cement for active cracks at grade, finished with proper door sweeps where doors don't sit flush. Done right, this work holds for years, not months.
How much does rodent proofing cost in NYC?
$200–$1,200
One-time baiting: $200–$500. Exclusion (baiting + entry-point sealing): $400–$900. Ongoing monitoring: $100–$200/month. NYC per-treatment overall: $300–$1,200 (avg ~$475). National per-visit average: $345 (range $216–$495).
| One-time baiting | $200–$500 per treatment |
| Exclusion (baiting + sealing) | $400–$900 per treatment |
| Ongoing monitoring | $100–$200 per month |
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.
Angi's $345 average (range $216–$495) is the only tier-1, NYC-geo-targeted figure found and is notably lower than the tier-2 NYC blogs' $300–$1,200 claim. Both are shown — do not collapse into a single misleadingly precise number.
What drives the price
- Baiting-only vs full exclusion (sealing entry points)
- Number of visits needed for heavy infestation (3–5 visits can total $700–$1,500)
- Building type / density
- Ongoing monitoring plan vs one-off
Signs you have a rodent proofing problem
- You've had a rodent problem before and want it to genuinely stay resolved, not just resurface next season
- Visible daylight or a draft around a pipe, vent, or door threshold at ground level
- A neighbouring unit or an adjacent building has an active infestation and you want to get ahead of it
- You're taking over a pre-war or older property and want a baseline exclusion audit before move-in
- Seasonal timing — proofing done in late summer closes the door before the autumn entry season starts
Why New York sees this
Pre-war NYC buildings can never be fully sealed — settlement cracks, original wood framing, and connected basement voids mean proofing is about closing every gap you can control, not achieving a hermetic seal, which is why proofing pairs best with ongoing monitoring rather than a one-time guarantee.
Basement bulkhead doors are the single most common unsealed entry point we find on NYC residential properties — if the hinge side isn't sealed and the door doesn't sit flush, it functions as an open door to a rat.
Tree limbs touching a building facade and untrimmed vegetation against foundations are frequently overlooked access routes we flag as part of the exterior audit.