Smart lock installation costs most Los Angeles homeowners $75–$300 in labor on top of the lock itself, and the job usually takes under an hour once the right lock is picked for the door. The real decision isn’t the price — it’s whether you need a full deadbolt replacement or a retrofit that keeps your existing hardware, and that choice depends on your door, your lease, and which brand actually fits.
This guide covers both installation types, how to pick a lock for your specific door, the fit problems that show up in older LA housing stock, and honest cost ranges so you know what to expect before booking anyone.
What’s the Difference Between a Smart Deadbolt and a Retrofit Smart Lock?
Smart locks split into two very different jobs.
A smart deadbolt replacement swaps your entire deadbolt — the exterior cylinder, the interior thumbturn, and often the strike plate — for a new smart unit. It’s a full hardware change, similar to installing any new deadbolt, and it gives you the most reliable fit because the lock is built around your door’s bore holes and backset.
A retrofit smart lock (sometimes called a “smart lock adapter”) keeps your existing deadbolt in place and adds a motorized cover over the interior thumbturn. The outside of your door looks untouched — no new keyway, no visible smart hardware, just your original lock and key still working exactly as before.
Retrofit locks exist for one main reason: they don’t require permanent changes, which matters a lot for renters and anyone who wants to keep the original hardware intact.
Deadbolt Replacement vs. Retrofit: Which One Do You Need?
| Deadbolt Replacement | Retrofit Smart Lock | |
|---|---|---|
| Changes to the door | Full lock swap, new exterior face | None — existing deadbolt stays |
| Renter-friendly | Only with landlord approval | Usually yes, reversible |
| Physical key still works | Only if the new lock includes one | Yes, unchanged |
| Fit flexibility | Best on standard bore holes | Depends on thumbturn size/shape |
| Typical install time | 30–60 minutes | 15–30 minutes |
| Weatherproofing | Built for exterior use | Interior-only, needs no exposure |
| Best for | Owners, long-term tenants with approval | Renters, month-to-month leases |
If you own the home or have a lease that allows hardware changes, a deadbolt replacement is usually the more reliable long-term option. If you’re renting and can’t modify the exterior lock, a retrofit is almost always the better fit.
Can Renters Install a Smart Lock in a Los Angeles Apartment?
Often, yes — but the lease decides, not the lock. Most LA leases allow tenants to add a retrofit smart lock because it doesn’t alter the door’s existing hardware and can be removed at move-out without a trace. Full deadbolt swaps are a different story: many buildings require the landlord to keep a working key, so swapping the entire lock without approval can violate the lease even if the install itself is clean.
Before installing anything in a rental:
- Check your lease for language about locks, hardware changes, or “alterations.”
- Ask before swapping the exterior deadbolt — even if you plan to reinstall the original lock at move-out.
- Keep the original hardware in a labeled bag so it can go back on before you leave.
- Get approval in writing if your building requires landlord-held keys for emergency access.
For more on what’s renter-safe to change versus what needs a landlord’s sign-off, see our West Hollywood apartment repairs guide — the same rules about documenting changes and using reversible hardware apply here.
Which Smart Lock Brands Work Best for Which Door Types?
Not every smart lock fits every door, and this is where a lot of DIY installs go sideways.
| Door Situation | Works Well With | Watch Out For |
|---|---|---|
| Standard 2-1/8” bore, single-cylinder deadbolt | Most major deadbolt-replacement brands | Backset must match (2-3/8” or 2-3/4”) |
| Older door, non-standard or oversized bore | Deadbolt-replacement models with adjustable faceplates | Some new locks won’t cover a mismatched hole |
| Renter, want to keep existing key | Retrofit/adapter-style smart locks | Thumbturn shape and size vary — measure first |
| Glass or French doors | Slim-profile deadbolts or keypad-only handlesets | Many bulky smart locks won’t clear the frame |
| Gate or side-entry door with a mortise lock | Specialty mortise smart locks (limited selection) | Most retail smart locks are built for bored locks, not mortise |
Before buying, measure your door’s backset (the distance from the door edge to the center of the bore hole) and your door thickness. A lock rated for a 2-3/8” backset won’t sit right on a 2-3/4” door, and that mismatch is the single most common reason a DIY smart lock install fails.
What Fit Problems Show Up in Older Los Angeles Doors?
A lot of LA housing stock predates the standardized bore sizes most smart locks are designed around. The most common issues we run into:
- Oversized or oval bore holes from decades of old hardware changes, leaving too much play for a new lock’s mounting screws to grip tightly.
- Non-standard backsets on pre-war and mid-century doors, especially in Pasadena and Silver Lake homes with original hardware.
- Warped or swollen doors that bind before the deadbolt even reaches the strike plate — common in older wood doors exposed to seasonal humidity shifts.
- Misaligned strike plates from years of settling, which can make a brand-new smart deadbolt feel “stiff” even when the lock itself is fine.
- Thick doors or added weatherstripping that push past a lock’s rated door-thickness range, especially on exterior doors with added insulation.
None of these make a smart lock impossible — they just mean the install sometimes needs shimming, strike plate adjustment, or a different lock model than the one advertised as “universal fit.”
How Much Does Smart Lock Installation Cost?
| Scope | Typical Cost |
|---|---|
| Lock unit only (mid-range deadbolt) | $120–$250 |
| Lock unit only (premium/video-integrated) | $250–$450 |
| Retrofit adapter lock | $80–$180 |
| Professional installation labor | $75–$300 |
| Installation with strike plate or bore adjustment | $150–$350 |
| Full exterior door hardware upgrade (lock + handleset) | $250–$550 |
Labor cost depends mostly on whether the bore holes line up cleanly with the new lock or need adjustment. A straightforward swap on a standard door is quick. A door with an oversized hole, a misaligned strike plate, or a non-standard backset takes longer and costs more, since it’s fitting hardware to a door rather than just following a manual.
Do You Need Wi-Fi, Bluetooth, or a Hub for a Smart Lock?
This affects setup time more than installation itself, but it’s worth deciding before you buy:
- Bluetooth-only locks connect directly to your phone within range — simplest setup, no extra hardware, but no remote access from outside the home.
- Wi-Fi locks connect straight to your home network for remote locking/unlocking and activity notifications, but they tend to burn through batteries faster.
- Hub-based locks (using a separate bridge device) usually offer the best battery life and most reliable remote access, at the cost of one more device to set up.
For most LA apartments and single-family homes, a Bluetooth-only or Wi-Fi lock covers the need. Hubs make more sense for larger properties, rental units managed remotely, or anyone who wants smart-home integration beyond just the door.
How Long Does Smart Lock Installation Take?
A straightforward deadbolt replacement on a standard door typically takes 30 to 60 minutes, including removing the old hardware, fitting the new lock, and testing the deadbolt throw. A retrofit adapter is faster — usually 15 to 30 minutes — since the existing deadbolt stays untouched.
Add time for:
- Strike plate realignment (10–20 minutes)
- Boring or adjusting an oversized hole (30+ minutes)
- App/Wi-Fi setup and testing (varies by brand, usually 10–15 minutes)
If more than one door is getting a smart lock, most of the added time is setup and syncing, not the physical install.
Smart Lock Installation: DIY or Call a Pro?
DIY makes sense if:
- Your door has a standard bore hole and backset
- The strike plate is already aligned and the deadbolt currently throws smoothly
- You’re comfortable following a manufacturer’s install guide and doing basic app setup
Call a pro if:
- The bore hole is oversized, oval, or doesn’t match the lock’s spec
- The door sticks, binds, or the current deadbolt is hard to turn
- You’re installing a retrofit lock and the thumbturn shape doesn’t match the adapter cleanly
- You want it done once, correctly, without a return trip to the hardware store for a different model
A mismatched lock isn’t just an inconvenience — a deadbolt that doesn’t seat fully into the strike plate is a security gap, not just a cosmetic one.
How Do You Maintain a Smart Lock Once It’s Installed?
Smart locks need a bit more upkeep than a standard deadbolt:
- Replace batteries proactively — most locks warn at 20% remaining, but keep spares on hand so you’re never locked out.
- Keep the exterior keypad or reader clean — dust and grime in coastal LA neighborhoods can affect touch-sensitive keypads over time.
- Re-check the strike plate alignment every year or so, especially in wood doors that shift seasonally.
- Update the lock’s firmware through the manufacturer app when prompted — security patches matter for connected hardware.
- Test the physical key backup (if your lock has one) periodically, so it isn’t the first time you’ve used it during an actual lockout.
Frequently Asked Questions
Do I need a locksmith to install a smart lock?
No — most smart lock installation is standard handyman work, whether it’s a full deadbolt swap or a retrofit adapter. A licensed locksmith is more relevant for rekeying, safe work, or specialty mortise locks that most retail smart locks aren’t built for.
Will a smart lock work on any front door?
Not automatically. Fit depends on your door’s bore hole size, backset, and thickness. Most standard exterior doors work fine with a bored deadbolt-style smart lock, but oversized holes, non-standard backsets, or mortise locks need a different approach — sometimes a specific lock model, sometimes an adjustment to the door itself.
Can I keep my existing key with a new smart lock?
Yes, with the right lock. Many smart deadbolts include a physical keyway as a backup alongside the electronic entry. Retrofit adapters keep your original key working automatically, since the underlying deadbolt never changes.
How long do smart lock batteries last?
Most residential smart locks run 6 to 12 months on a set of batteries under normal use, though Wi-Fi-connected locks tend to drain faster than Bluetooth-only models. Frequent use, cold weather, and constant connectivity checks all shorten that window somewhat.
What happens if the smart lock loses power or breaks?
Nearly every smart deadbolt includes a physical key override or external battery contacts for emergency power, precisely for this scenario. Check that any lock you buy has one of these before installing it — it’s the difference between a dead battery being an inconvenience versus a lockout.
Is a smart lock worth it for a rental property?
For many LA rentals, yes — especially for short-term or turnover-heavy units, since a retrofit lock lets property managers reset access codes between tenants without rekeying. It’s worth confirming with your landlord or HOA before installing anything that changes the exterior hardware.
Get Your Smart Lock Installed Right the First Time
Picking the right lock for your door matters more than the brand name on the box. Handyman LA installs both deadbolt-replacement and retrofit smart locks as part of our general handyman services — including strike plate adjustments and bore fixes on older doors that off-the-shelf installs don’t account for. If your door sticks like the ones in our sliding door and screen door repair guides, that’s worth fixing before the smart lock goes in, not after.
Call (213) 686-5039 or request a free quote online and we’ll tell you which lock actually fits your door before you buy one.