Rekeying a 40-Unit Complex After a Problem Tenant
Chicago, IL · 3 Buildings · 127 Locks
Marcus W. manages a 40-unit portfolio across three buildings on the North Side. After a contentious eviction, he needed every lock changed before the weekend — and his maintenance team had already quoted him 14 hours of labor at overtime rates. He pulled up a YouTube video, ordered a rekey kit, and started doing the math.
| Factor | DIY Attempt | ✦ Professional |
|---|---|---|
| Upfront Cost | $18–$35 per lock (hardware only) | $12–$18 per cylinder, volume discount on 40+ units |
| Time Investment | 3–5 hrs per building × 3 buildings = 15+ hrs | 4 hrs total, scheduled off-peak. Done by noon. |
| Master Key System | Near-impossible without proprietary pinning tools | Included. Keyed alike, master-keyed, or both. |
| Liability if Lock Fails | Full landlord liability — tenant injury or break-in | Licensed, bonded, insured. Warranty on labor. |
| Code Compliance | Easy to miss egress & ADA requirements | Verified against local code before install |
| Tenant Disruption | High — multiple visits, unit re-entry required | Single coordinated visit, tenants notified once |
| Risk of Damage | Door frame damage common without experience | Zero — guaranteed or we fix it free |
How It Resolved
Marcus called at 7:40 a.m. on a Friday. By 11:55 a.m., all 127 cylinders were rekeyed on a unified master system, building managers had their own sub-master keys, and every tenant received a new key by mail slot. Total cost: $1,847 — $340 less than the maintenance overtime quote, and done in a single morning instead of two weekends.