Services
Residential Services
Your home should feel safe — every time you walk through the door.
Whether you just moved into a new home, recently experienced a break-in, lost your keys, or simply want to upgrade to a modern keyless system — 4S Lock and Safety provides trusted residential locksmith services with the professionalism and care your home deserves.
We serve homeowners, landlords, and renters across Washington County and the surrounding region. Our technicians are licensed, background-checked, and respectful of your property and your time. We arrive on time, explain our work clearly, and leave your home more secure than we found it.
Contact Us For:
- Emergency Lockout Service — Available 24/7
- Lock Installation and Replacement
- Lock Rekeying — New Home, Tenant Change, or Lost Keys
- Keyless and Smart Lock Installation
- Electric Lock Solutions
- Security Assessments and Upgrade Recommendations
- Residential Master Key Systems for Landlords
You're in Good Hands
Licensed & Insured
Our technicians hold professional licenses and carry full liability insurance.
Background-Checked
Every 4S technician is background-screened — so you know who is coming to your door.
On Time, Every Time
We respect your schedule. If we’re running late, we call ahead.
Transparent Pricing
No surprise fees. We discuss pricing before we begin any work.
Serving residential clients in Hagerstown, Martinsburg, Frederick, Chambersburg, and surrounding communities in Washington County, MD and the Mid-Atlantic region.
Let's make your home safer — reach out for trusted residential service.