Smart Lock Fit Check: Will a Retrofit Lock Fit Your Door?

Eight questions. We compare your answers with the requirements SwitchBot publishes for each model and list anything you still need to check. This is a guide, not a guarantee that a lock will fit.

1.What kind of door is it?

A regular hinged door (front, back, side, or garage entry) A sliding or patio door A storm or screen door Not sure

2.What lock does the door have now?

Look at the inside of the door, above the handle.

Deadbolt with a key outside and a turn knob (thumbturn) inside Deadbolt that needs a key on both sides Jimmy-proof deadlock (a box mounted on the inside surface, common in NYC apartments) Mortise lock (a rectangular lock body set into the edge of the door) Only a knob or lever lock, no deadbolt An electronic or keypad lock Not sure

3.Does the thumbturn turn easily by hand when the door is closed?

Retrofit locks turn your existing thumbturn with a small motor. A bolt that sticks or needs a push on the door can stall it.

Yes, it turns smoothly It sticks, or I have to push or pull the door first There is no thumbturn on the inside Not sure

4.Which way does the door open?

Into the home Out, away from the home Not sure

5.With the door closed, how far is the center of the thumbturn from the door frame? (optional)

Measure on the inside of the door. Leave blank if you have not measured yet.

Distance

Door opens inwardat least 33 mm (1.30 in) Door opens outwardmore than 40 mm (1.57 in) Lock Ultra figures from SwitchBot’s compatibility page, checked Oct 26, 2026.

6.Do you rent or own?

I rent I own

8.What is your budget?

Under $150 $150 to $225 $225 to $275 $275 or more Flexible

Will a retrofit smart lock fit your door?