# Mice in walls in Calgary > Mice in the walls in Calgary? We inspect, treat what is inside and close the outside joint they use. $100–$1,500 depending on the severity of the infestation and the scope of exclusion, GST extra. Inspection is complimentary when you proceed with the recommended service. Call 825 747 5787. Canonical: https://www.frameworkpest.ca/mice-in-walls-calgary/ Last updated: 2026-10-27 Mice · Calgary and area Inspect, treat, close the gap If you hear scratching in a wall or ceiling at night, mice have found a gap outside and a cavity inside. We inspect, treat what is already in the house, and close the outside joint they used. October is not too late. [Request a written quote](https://www.frameworkpest.ca/contact/) [Call 825 747 5787](tel:+18257475787) [Text a photo](sms:+18257475787) Typical visit: $100–$1,500 depending on the severity of the infestation and the scope of exclusion, GST extra. Inspection is complimentary when you proceed with the recommended service. Calgary, Airdrie, Cochrane, Chestermere, Okotoks, High River. ## What the visit is - **1. Inspect and name it.** We walk the outside, garage to roofline, and the rooms where you hear it. Droppings get named before anything is sealed. A mouse pellet holds its shape when pressed. Bat guano crumbles. Bats are a different job. - **2. Treat what is inside.** Least-risk labelled treatment, placed where children and pets cannot reach. We treat a wall void only if we can name it. - **3. Close the joints.** Garage weatherseal and corners, the door from the garage into the house, pipe and cable sleeves, the rim joist, unscreened vents, the brick–soffit seam. Copper mesh with a sealant that moves, and metal screens. Not foam on its own. - **4. Put it in writing.** You get the list of joints we closed and documented, what is still open, and aftercare in writing. ## Why we do not seal the inside hole first Stuffing the hole behind the stove feels right. The mice already inside stay inside. They chew a new way out, or they die in the wall. The order that works: knock down the population on the living-room side, and close the outside joint that let them in. Sequence, not religion. The long version is [Mice are a building problem, not a trap problem](https://www.frameworkpest.ca/insights/mice-building-problem/). ## Where mice get into Calgary walls A house mouse fits through a gap of about 6 mm, roughly the size of a dime ([Penn State Extension](https://extension.psu.edu/is-there-a-mouse-in-the-house-eliminate-mice-with-ipm)). Alberta’s [mouse control guidance](https://www.alberta.ca/mouse-control) says to seal gaps that size with gnaw-resistant material such as metal or concrete. Freeze-thaw and Chinooks keep reopening joints that were tight in July. The usual entries: - The garage door bottom seal and its corners - The door from the garage into the house - Pipe and cable sleeves at grade - The rim joist and the deck ledger - Unscreened dryer, bath and HRV vents - The [brick–soffit seam](https://www.frameworkpest.ca/insights/brick-soffit-mouse-entry/) under the roofline If you have trapped at floor level and the ceiling still runs at night, the hole may be twenty feet up. The full walk-around is in [mice entry points into a house](https://www.frameworkpest.ca/insights/rodent-proof-calgary-home/). ## What it costs A typical mice visit is $100–$1,500 depending on the severity of the infestation and the scope of exclusion, GST extra. Inspection is complimentary when you proceed with the recommended service. We do not quote a spray price on the phone. The written quote names the joint. See [what it costs](https://www.frameworkpest.ca/cost/). ## What the Gap Guarantee covers The [Gap Guarantee](https://www.frameworkpest.ca/guarantee/) covers re-entry through a joint we closed and documented on the job report, during the first freeze-thaw season after that visit. The remedy is a free return to that same joint. It is not a whole-house seal. Freeze-thaw opens new joints, and those get a new quote. ## When you may not need us One mouse, one night, in an otherwise tight house may only need snap traps along the run and a daylight check on your doors. If that is where you are, start with [what to do tonight](https://www.frameworkpest.ca/insights/mice-in-walls-calgary/). If a store product is enough, that is the honest answer. ## Related reading - [mice in the attic](https://www.frameworkpest.ca/attic-mice-calgary/) - [mouse-proofing service](https://www.frameworkpest.ca/mouse-proofing/) - [mouse proofing cost in Calgary](https://www.frameworkpest.ca/mouse-proofing-cost-calgary/) - [humane mouse control options](https://www.frameworkpest.ca/humane-mouse-control-calgary/) - [pest exclusion glossary](https://www.frameworkpest.ca/glossary/) ## Questions ### How do you get mice out of the walls? We deal with the inside and the outside at the same visit. Traps and labelled products go where the mice run, placed where children and pets cannot reach. We treat a wall void only if we can name it. Then we close the outside joint with materials that survive freeze-thaw. ### Will the scratching stop right away? Not always the first night. Mice already inside take time to clear. That is why a rodent visit carries a 30-day follow-up for activity in the same zone while exclusion is in progress. Some activity in week one is expected. ### Is October too late to deal with mice in the walls? No. Mice start testing the house in late August and September. In October the job is two things at once: treat what is already inside and close the gaps they used. January is still worth doing. ### How fast can you come? Call or text a photo to [825 747 5787](tel:+18257475787). Tell us what you hear, where, whether there are kids or pets, and how fast you need us. Occupancy, food and clinical notes jump the queue. ### Will you guarantee the mice never come back? No. Freeze-thaw opens new joints every year, so nobody can honestly promise that. The [Gap Guarantee](https://www.frameworkpest.ca/guarantee/) covers re-entry through a joint we closed and documented, during the first freeze-thaw season after the visit. ### Can I fix mice in the walls myself? Sometimes. One mouse in a tight house may only need snap traps and a door sweep. If the gap is at grade or under a door, [the entry points guide](https://www.frameworkpest.ca/insights/rodent-proof-calgary-home/) walks you through it. If it is at the roofline, behind a rain-screen or at the rim joist, or this is the second winter running, book a visit. ## Show us the hole. Text a photo of what you found, call, or request a written quote. We will tell you if this is a nest, a joint, or a watch-and-wait. [Request a written quote](https://www.frameworkpest.ca/contact/) [Call 825 747 5787](tel:+18257475787) [Text a photo](sms:+18257475787)