Smart Lock Installation in Baltimore, MD

Does a Baltimore door suit a smart lock?

Most retail smart locks fit a standard bored deadbolt: a round hole through the face of the door and a smaller one into its edge. Older Baltimore rowhouse doors may not follow that layout. A pre-war front door can carry a mortise lock, whose body sits in a pocket cut into the door edge. Some models retrofit mortise locks, and some replace only the inside thumbturn and leave the outside cylinder alone. Measure the door thickness and photograph the lock before buying.

Newer housing is simpler. Canton has new townhouses beside its rowhouses from around 1900, and a townhouse door is more likely to take a standard retail model.

Approvals before installation

• City historic districts. In districts such as Mount Vernon, Union Square or Otterbein, an exterior change goes through an Authorization to Proceed application to the Commission for Historical and Architectural Preservation (CHAP). An interior-only retrofit leaves the street side untouched, so ask CHAP before adding a visible keypad to a historic door. This is general information, not legal advice.
• Condos. Canton's condominiums in rehabilitated waterfront industrial buildings share their entrances, and an association may have rules on unit door hardware.
• Rentals. Census Bureau estimates for 2024 put 51.6 percent of Baltimore households in rented homes. Check the lease and get the landlord's approval in writing before changing a lock the landlord keys.

Where the keypad sits

The city's preservation guidelines note that de-icing salts speed corrosion on wood and metal doors, so a keypad on a street-facing door may face the same salt that wears the latch. An inner vestibule door is sheltered from rain and snow, and CHAP asks owners to keep historic vestibules in place.

Replace batteries at the first low-battery alert; alkaline cells lose capacity in the cold. Keep a mechanical backup too, such as a key cylinder or a separate keyed deadbolt, so a dead battery does not become a lockout.

What to include with a smart lock request

• The smart lock model you have or plan to buy.
• Photos of the door face, the door edge and the existing lock.
• Whether the house is in a city historic district or the unit is under an association or lease.

See smart lock installation and lock replacement, or the Baltimore page for local housing notes.