Securing an Older San Dimas Home: A Practical Lock and Entry Checklist

Older homes have charm, but many have decades of wear, old hardware, and entry points nobody has thought about in years. Whether you own a bungalow near Old Town San Dimas, a hillside house in Via Verde, or a place tucked into San Dimas Canyon, the steps below help you find weak spots and fix them in a sensible order.

Work through the lists at your own pace. Most items cost little to check, and you can decide afterward what needs a professional.

Start With a Walk-Around Audit

Before buying anything, look at your home the way a stranger would.

• Count every exterior door, including side doors, patio doors, garage entry doors, and any old service door.
• List every key that opens each lock, and note who might still have a copy: former tenants, contractors, previous owners, relatives.
• Check which locks are original to the house. Hardware from several decades ago is often worn, loose, or easy to defeat.
• Look for doors hidden from the street by hedges, fences, or hillside grading. Privacy helps you, but it also helps anyone trying to work unseen.
• Note anything that sticks, wobbles, or needs to be lifted or shoved to lock.

Front and Back Door Checklist

Doors are the most common weak point, and in older homes the problem is often the door and frame, not just the lock.

• Test the door material. Hollow or thin doors can be kicked in. Solid wood or a solid-core door is a much better base.
• Inspect the frame. Look for cracked, dry, or split wood near the strike plate. Old frames often fail before the lock does.
• Check the strike plate screws. Short screws that only bite into the trim are a classic weakness. Longer screws that reach the wall stud add real resistance.
• Confirm there is a deadbolt. A spring latch alone is not enough. A properly installed deadbolt is one of the best upgrades you can make. See our overview of deadbolt installation for what to look for.
• Check the bolt throw. The bolt should extend fully into the frame without binding.
• Look at the hinges. Make sure the screws are tight and consider longer ones on the hinge side.

Windows and Sliding Doors

Many older San Dimas homes have original windows and aluminum sliders that were never designed with modern security in mind.

• Make sure every window latch actually closes and holds.
• Replace cracked or loose latches rather than living with them.
• For sliding doors, lift the door slightly to test whether it can be popped off its track.
• Lay a snug wooden or metal bar in the track as a simple backup.
• Check that the sliding door's lock engages firmly and is not bent or worn.
• Trim shrubs below ground-floor windows so there is no cover for someone working on them.

Garage and Side Entries

Garages are easy to overlook, yet they often connect straight to the house.

• Treat the door between the garage and the house like an exterior door, with a deadbolt and a solid frame.
• Keep that interior door locked, even when you are home.
• Check that the garage side door and any pedestrian door have working locks.
• Do not leave a spare key in the garage or hidden nearby.
• If you use an opener remote, keep it out of parked cars when possible.

Upgrading the Lock Itself

Once the door and frame are sound, the lock matters more.

• Consider rekeying if you do not know who holds old keys. It is often a practical alternative to replacing every lock.
• Replace worn cylinders that are hard to turn or that accept keys loosely.
• For doors that deserve extra protection, look into high-security locks, which add features like pick resistance and controlled key copying.
• Choose hardware that suits the character of the house. Many quality locks come in finishes that fit older styles.

Neighborhood-Specific Thoughts

Every part of San Dimas has its own conditions.

• Old Town and Downtown: Older homes close to foot traffic and events may have street-facing entries. Make sure the front door is as strong as the back, and keep porch lighting working.
• Via Verde: Hillside lots can create hidden side yards and rear doors. Check those entries and add lighting where grading blocks sightlines.
• San Dimas Canyon: Larger or more secluded properties benefit from lighting, strong gates, and well-secured outbuildings, since neighbors may be farther away.

For more local options, see our page on high-security locks in San Dimas.

Daily Habits That Matter

Hardware only works if it is used.

• Lock doors every time you leave, even for a quick errand.
• Keep exterior lights working and consider motion-activated fixtures.
• Avoid hiding keys under mats, planters, or fake rocks.
• Rekey or replace locks after a move, a breakup, or a lost key.
• Ask a trusted neighbor to watch your place when you travel.

Prioritize Your Upgrades

If the list feels long, tackle it in this order:

1. Fix any door or frame damage on your main entries.
2. Add or replace deadbolts with properly installed hardware.
3. Rekey locks if key control is uncertain.
4. Secure windows and sliding doors.
5. Add lighting and tidy landscaping.

Need a Hand?

Crenshaw Lock Company has been serving Greater Los Angeles and Ventura County since 1987, and our service is fully mobile, so we come to you. If you would like help with an older San Dimas home, call (323) 997-8867 or visit our San Dimas deadbolt installation page to learn more. You can also contact us with questions about your doors, locks, or keys.