Why building-level programs work and unit-level treatment doesn't
The most common failure mode in multi-family rodent control is treating individual tenant complaints rather than the building. A tenant in unit 1C calls about mice. The property manager sends a pest control company to unit 1C. The mice in unit 1C are treated — snap traps placed, bait placed, possibly a gap sealed at the kitchen baseboard. Two weeks later, unit 1C is re-infested from the shared wall void connecting it to unit 1B, which was never treated because no complaint came from there.
This cycle is common in Chattanooga's older apartment stock — the pre-1960s multifamily buildings in North Chattanooga, Highland Park, Downtown, and Southside where shared wall voids, common basement access, and aging foundation entry points create building-wide rodent movement regardless of what individual units do. A building-level program — exterior perimeter stations, common-area snap traps, shared entry-point sealing, and coordinated unit access — breaks this cycle by treating the system rather than the symptom.
Multi-family program structure
- Building inspection: Full exterior perimeter walk, common area survey (laundry, trash room, mail room, boiler room, parking garage), and assessment of shared entry points. Written program recommendation with building-level scope.
- Exterior perimeter stations: Foundation-perimeter bait stations covering the full building footprint. Additional stations at dumpster enclosures and service entries. Maintained on program schedule regardless of individual unit activity.
- Common-area interior treatment: Snap traps in all non-tenant common areas — laundry rooms, utility rooms, corridors, and parking areas. Checked and reset on every visit without tenant coordination required.
- Shared entry-point sealing: Foundation gaps, utility corridor penetrations, and common-area entry points sealed. This is the structural work that prevents the unit-to-unit cycling that reactive treatment creates.
- Individual unit treatment (as needed): When a unit interior is actively infested, coordinated access with 24-hour notice. Snap trap placement inside the unit, integrated with the building-wide program.
- Property management documentation: Service reports formatted for property management records, including dated visit logs, activity findings by zone, and any pesticide application records.
Pricing
| Property type | Monthly program | Notes |
|---|---|---|
| Duplex (2 units) | $125–$225/mo | Shared perimeter + common area + interior access both units. |
| Small building (4–8 units) | $200–$450/mo | Full perimeter + common areas + individual unit access as needed. |
| Mid-size building (9–20 units) | $350–$650/mo | Larger footprint. Based on building layout and pressure level. |
| Large complex (20+ units) | Quoted | After building inspection. Property-specific program and pricing. |
Frequently asked questions
Why does treating one apartment unit not solve the problem?
Rodents don't recognize unit boundaries. They travel through shared wall voids, utility chases, and common areas. Treating one unit while adjacent units and shared spaces remain untreated produces temporary results — the treated unit is re-colonized from untreated sources. Effective multi-family control treats the building as a single ecosystem.
How do you coordinate pest control access with tenants?
Tennessee law (TCA 66-28-504) requires 24-hour advance notice for non-emergency entry. We provide a tenant notification template and coordinate with property management for delivery. Common areas and exterior treatment require no individual unit access. Emergency situations have different access protocols under Tennessee law.
What does a multi-family program cost in Chattanooga?
4–8 unit building on monthly program: $200–$450/month. 9–20 unit buildings: $350–$650/month. Larger complexes quoted after inspection. Priced by building, not by unit — a per-unit estimate without seeing the building layout isn't reliable.
Are duplexes treated as multi-family or residential?
As multi-family — a duplex with a shared wall and foundation has the same unit-cycling problem as larger buildings. We recommend a shared program covering both units with the exterior perimeter and shared wall void as the primary treatment zones.