Most calls we get in Alhambra are pretty standard — a stuck deadbolt, a rekey after a tenant moves out, a key broken off in a mailbox. But every so often we pull up to a house and realize the front door has been protected by nothing but a basic knob lock for years. That was the case with Marisol’s place near Granada Park, just off Almansor Street.
She called us on a Tuesday around 4 PM. Her voice had that mix of embarrassment and concern we hear a lot from first-time homeowners. “I just bought the house in February,” she said, “and my dad came over yesterday and asked me where my deadbolt was. I didn’t even know I didn’t have one.”
What We Found at the Door
The house was a 1940s Spanish bungalow, beautifully kept, sitting on one of those quiet blocks south of Main Street. When I walked up to the porch, I could see right away what her dad had been talking about. The front door had a single brass knob lock — the kind with a tiny push-button on the inside and a key cylinder on the outside. No deadbolt above it. Just the knob.
That setup might have been acceptable in 1948 when the house was built, but it’s genuinely not enough today. A knob lock has maybe a half-inch of latch holding the door shut, and the latch itself is spring-loaded — meaning it can be slipped with a credit card or a thin piece of metal in under ten seconds. We’ve demonstrated it on training doors more times than I can count.
Marisol walked me through her concerns. She works late shifts at a clinic over by Alhambra Hospital and gets home after dark. Her bedroom faces the backyard, and she’d been hearing what she thought was someone testing her door handle at night. Whether that was real or just an old house creaking, the answer was the same: she needed a real deadbolt.
The Job Itself
Installing a deadbolt on a door that has never had one is more involved than swapping out an existing lock. The door has to be bored — a 2 1/8″ hole through the face of the door for the lock body, and a 1″ hole through the edge for the bolt. You also have to mortise the strike plate into the jamb so the bolt has somewhere to go.
I measured up from the existing knob — the standard spacing is 5 1/2 inches between the centers, though you can go up to 6 inches depending on the door. Marisol’s solid-wood door was in great shape, which made the job easier. I used a self-centering jig clamped to the door so the holes would line up perfectly with the strike on the jamb.
What We Installed
We went with a grade 1 single-cylinder deadbolt with a hardened steel bolt and a reinforced strike plate. The strike plate matters as much as the lock itself — we use 3-inch screws that go all the way through the jamb and bite into the framing studs behind it. That’s the part most off-the-shelf kits skimp on, and it’s the part that actually stops a kick-in. A standard 3/4″ screw will let the jamb split off the wall under one good shove.
I also keyed the new deadbolt to match her existing knob lock so she’d only need to carry one key. Took maybe forty minutes start to finish, including cleanup.
Why This Matters in Alhambra Specifically
Alhambra has a lot of older housing stock — Craftsman bungalows around Storyland Park, Spanish-style homes in the Midwick area, post-war ranches up by Alhambra Park. A surprising number of them still have original or near-original hardware. If your front door is more than 50 years old and hasn’t been upgraded, there’s a real chance you’re in the same boat Marisol was.
If you want to read more about the service itself, here’s our page on . We also handle if your existing hardware is sticking, loose, or just feels off when you turn the key. For everything else we cover in the area, see our full list of Alhambra locksmith services.
A Few Quick Tips Before You Buy a Deadbolt Yourself
- Look for ANSI Grade 1 or Grade 2 on the packaging. Grade 3 is fine for an interior closet, not a front door.
- Skip the cheap strike plate that comes in the box. Buy or ask for a reinforced plate with 3-inch screws.
- If you have a window within 40 inches of the deadbolt, a double-cylinder lock is worth considering — but check your local fire code first.
- Don’t drill into a metal-clad or fiberglass door yourself. Those need different bits and a much steadier hand.
If you’re in Alhambra and your front door is in a similar spot to Marisol’s, give us a call at (818) 398-9391. We can usually come out the same day, take a look, and tell you honestly whether a new deadbolt is what you need or if there’s a simpler fix.
— Locksmith HQ Team
