Smart Lock Install: 4 Things to Check Before You Buy

TL;DR: A smart lock is only as good as its setup — and its fit. Here's what to check before you install one.

_Last reviewed: July 2026 · 2 min read_

A smart lock is a great upgrade, but the most common problems happen before it's ever installed — buying one that doesn't fit your door. Four checks save the headache: measure the door, confirm the deadbolt type, set individual codes, and test the backups.

How do I know a smart lock will fit my door?

Measure your door thickness first. Most smart locks fit standard doors (around 1⅜ to 1¾ inches), but thicker or thinner doors need an adapter or a different model. Also check the backset (the distance from the edge to the bore hole) and the bore hole size. A two-minute measurement prevents a returned lock.

Does my existing deadbolt matter?

Yes. Confirm your deadbolt type matches the lock you want. Some smart locks replace the entire deadbolt; others (like retrofit models) keep your existing deadbolt and exterior key and only swap the interior thumb-turn. The retrofit type is easiest if you like your current keys — just verify compatibility with your hardware.

Should everyone share one code?

No — set a unique code per household member (and temporary codes for guests, dog walkers, or contractors). Individual codes let you see who came and went and revoke one person's access without changing everyone's. Shared codes defeat half the point of a smart lock.

Why test the backup options?

Because batteries die and tech glitches. Test the backup key or battery option before you rely on the lock — know where the physical key is (most keep one), how to jump-start it with a 9-volt battery if it dies, and how the manual override works. Getting locked out of your own smart lock is avoidable.

Record codes and backups

Keeping track of codes and the backup-key location keeps the household running smoothly. Okoniq Property Hub stores your device and access notes with your home maintenance records in one private place. Pair a smart lock with a doorbell camera for full entry coverage.

Frequently asked questions

Are smart locks secure?

Reputable smart locks use strong encryption and are as secure as — often more than — a traditional lock, with the bonus of access logs and remote control. Choose a known brand and keep its app updated.

What happens if the batteries die?

Most warn you well in advance and offer a backup: a physical key, an external battery contact, or both. Replace batteries on schedule and keep a backup key accessible.

Okoniq Property Hub helps homeowners and landlords keep maintenance, bills, and contractor info in one calm place. Get started free.

FAQ

How long does it take to install a smart lock yourself?

Most smart lock installations take 15 to 30 minutes with just a screwdriver, especially retrofit models that reuse your existing deadbolt — full-replacement models may take closer to 45 minutes if you're swapping the entire lock mechanism.

Can I install a smart lock on a metal door?

Yes, as long as the door thickness and bore hole match the lock's specs — metal doors often fall in the standard 1¾-inch range, but always measure first since some commercial or security-grade metal doors are thicker and need adapters.

Do smart locks work with Airbnb or short-term rentals?

Yes, temporary code features make smart locks ideal for short-term rentals — you can issue a unique code per booking, set it to expire automatically, and avoid hiding physical keys or meeting every guest in person.

What's the difference between Wi-Fi and Bluetooth smart locks?

Wi-Fi locks connect directly to your network for remote control from anywhere, while Bluetooth locks require you to be nearby (usually within 30 feet) unless paired with a separate hub or bridge device.