Will a smart lock fit with a storm door?

Two answers circulate, and only one has a number behind it#

Search this question and you get two answers. Forum threads and listicles say you need a special low-profile lock made for storm doors, while the lock makers say yes, with a condition. Kwikset's answer for its SmartCode 955 is typical: "Yes, if there is ample spacing between the two doors & the handles of the storm door and this product won't interfere."

Neither answer gives a figure, and "ample" is not a measurement. The figure is in the storm door's own installation guide. Set it next to the depth on smart lock spec sheets and the "special lock" answer falls apart for ordinary smart deadbolts, though it survives for a few lock types named below.

What a storm door is, and the gap it needs#

A storm door is a second, lighter door hung outside your entry door. It does not hang in the door frame but screws to the face of the exterior trim around the opening, which installers call the brick mold. That leaves a shallow space between the two doors when both are shut. Your entry door's outside hardware sits in that space, and so does the inside handle of the storm door.

The storm door makers set a minimum for that space. Andersen's guide for its 1 1/4 in Fullview storm doors asks for "2 1/2" depth for storm door hardware". EMCO's Woodcore guide calls the same figure "2 1/2" handle clearance". Its drawing measures it from the outside face of the trim back to the face of the entry door. Andersen's 3000 Series guide prints the same 2 1/2 in.

The other term that matters is handing, which means the side the storm door hinges on. A right-handed storm door has its handle on the right as you face it from outside, and a left-handed one has it on the left. Andersen's Fullview guide and EMCO's Woodcore guide each carry steps for both hands, so you choose at install.

How far smart locks stand off the door#

Every lock here publishes the depth of its outside half, meaning how far it stands off the face of the door. These are the figures from each maker's own sheet, as of November 2026.

Yale's sheet labels each size "L x W x H", so L is the depth, and Kwikset's drawing marks its C dimension from the door face outward. Yale's online FAQ gives 1 3/8 in for the YRD216 as well as the YRD226; this page uses the spec sheet, which gives the YRD216 its own smaller figure.

For scale, Level's compatibility guide sorts ordinary keyed deadbolts into two kinds. A low-profile deadbolt measures "less than 3/4" (19mm) off of the door surface", and a standard one stands further out. By that line, only Yale's YRD256 is low profile. The rest stand out about as far as a standard keyed deadbolt. Even the deepest, at 1 3/8 in, is little more than half the 2 1/2 in gap. Depth is not what rules a smart deadbolt out.

The real clash is two handles in one spot#

What does rule one out is the shared gap. Andersen's guide says so directly: "Most homeowners prefer to have the storm door handle on the same side as the entry door handle. In shallow door openings, this can cause the two handles to interfere."

The storm door's inside handle reaches back into the same gap your lock stands in. If the two line up, the lock's depth comes out of the room the storm door needs. Andersen's fix, and EMCO's, is the same: "hand the storm door on the opposite side of your entry door." Andersen's 3000 Series guide words it as buying "a storm door that is hinged on the opposite side of your entry door".

Hinged that way, your lock faces the storm door's hinge edge, where nothing reaches back into the gap, and the storm door's handle is across the opening.

Worked through: a Yale Assure on a 3 in recess#

Here is one case worked through the published figures. Suppose your entry door sits 3 in back from the face of the trim, which clears the 2 1/2 in Andersen and EMCO ask for. Now suppose you fit a Yale Assure YRD226, the deepest deadbolt in the table at 1 3/8 in.

• Storm door hinged on the lock's side. The lock faces the hinge edge, and the storm door's handle has the full 3 in on the far side. This passes.
• Storm door handle on the lock's side, at the same height. The lock uses 1 3/8 in of the 3 in, which leaves 1 5/8 in. The storm door wants 2 1/2 in for its hardware, so this fails by 7/8 in.
• Same side, a shallower lock. A Schlage Encode at 0.89 in leaves 2.11 in, and the YRD256 at 11/16 in leaves 2 5/16 in. Both still fall short of 2 1/2 in.

So on this door, no deadbolt in the table fixes a same-side clash by being thinner, and each one fits once the storm door is hinged on the lock's side. To share one side, the recess would need 2 1/2 in plus the lock's depth: about 3 3/8 in for the Encode and 3 7/8 in for the YRD226. That sum is this page's arithmetic from the two published figures, not a maker's rule.

The Schlage Encode lever shows where the "special lock" worry has a point. Its outside half is 3 in deep, more than the whole 2 1/2 in gap, and a lever sits at handle height, where the storm door's handle is. Behind a storm door, a smart lever needs the storm door hinged on its side.

Locks that fail for other reasons#

Two kinds of lock are ruled out behind a storm door even when they fit the gap.

Camera locks. A lock with a doorbell camera in its outside half needs to see the porch. eufy's E330 guide says plainly that the Video Smart Lock E330 "is not compatible with storm doors and may not be suitable for the standard entry doors behind them, as the storm door may block the camera". Depth is not the problem; the view is. A camera at that door has to sit outside the storm door, which means a separate doorbell rather than the lock. The cameras guide covers that side, and video doorbell transformer requirements covers the wiring.

Palm locks. Wyze's answer for its Palm Lock is "No, we do not recommend it." The reason is motion. Storm doors "can cause the lock to wake excessively due to motion. Even minor motion, like wind blowing, can shift the door and wake up your Wyze Palm Lock - even hundreds of times per day." Wyze says that motion "will drain the battery rapidly", and its door compatibility page lists "Your lock is behind a storm door" as a case where the lock is not recommended. If one is already installed, Wyze says to turn on Extreme Battery Saving Mode (Settings, then Battery Management), which keeps the screen asleep until you tap it.

The pattern carries to locks not named here. A lock that wakes on motion, or needs to see out, has a second test beyond depth, so check its maker's storm door answer before you buy.

Keypads and heat behind a storm door#

A keypad behind a storm door works like a keyed lock: you open the storm door first. So if the storm door has its own lock and you keep it locked, a code or a phone unlock gets you nowhere.

Heat is the other thing the storm door guides raise. Andersen and EMCO both warn that "Entry door hardware and handle may become hot when exposed to sunlight", without giving a temperature. Schlage rates the outside half of the Encode to 150.8°F (66°C), and smart locks in cold weather sets out the published temperature ranges for Schlage, Yale and August locks.

Measure before you buy#

1. Measure the gap

   With the storm door open, measure from the outside face of the trim, where the storm door mounts, straight back to the face of your entry door. Andersen and EMCO want at least 2 1/2 in for the storm door alone.

2. Note which side each handle is on

   Stand outside and note which side your lock and the storm door's handle are on. If they are on opposite sides, depth is not your problem.

3. Check the heights

   If both are on the same side, compare the height of the storm door's inside handle with your deadbolt and your entry handle below it.

4. Subtract the lock's depth

   Take the gap and subtract the depth of the lock you want, from the table above. If the handles line up and what is left is under 2 1/2 in, plan to hinge the storm door on the lock's side.

5. Read the lock maker's storm door answer

   For a camera lock, a palm lock, or anything that wakes when it senses motion, look up the maker's own storm door answer. eufy and Wyze both publish one.

Choosing a lock around a storm door#

The storm door adds a step; it does not change the other answers. Door fit comes first, and will a smart lock fit my door covers thickness, backset and bore across seven brands. Then the storm door, using the steps above. Then the features in the smart locks guide, such as codes, logs and which platform manages them.

• Storm door hinged on the lock's side. Any smart deadbolt in the table fits on depth, so choose by features.
• Handles on the same side. Run the sum. If it falls short, re-hang the storm door, which is the makers' fix; a thinner lock did not fix it on the 3 in recess above.
• You want a camera at the door. Skip the camera lock and put a doorbell camera outside the storm door.
• You like the Wyze Palm Lock. Wyze does not recommend it behind a storm door.

If you rent, check a smart home for renters before re-hanging anybody's storm door. The pre-purchase checklist is the place to note the storm door next to the door measurements, and if a lock that fit goes quiet later, see a device that stops responding.

Where this page stops#

• The documents read. Two Andersen guides and one EMCO guide give the 2 1/2 in figure. Larson, Pella and other storm door makers were not read, and their figure may differ. Check your own storm door's guide.
• The locks read. Depths come from Schlage, Yale, Kwikset and U-tec documents as of November 2026. August, Level's own exterior depth and other brands were not read, so this page gives no figure for them.
• Storm door handle depth. No guide read here gives how far a storm door's inside handle reaches. The 2 1/2 in is the makers' allowance for it. Your own handle is what you measure.
• Re-hanging a storm door. Changing the handing of an installed storm door is a re-installation, done to the maker's guide. This page does not cover how, and some models may not allow it. Ask the maker.
• Security. A storm door with its own lock changes who can reach the smart lock, but this page says nothing about how secure either door is. Securing a smart home covers the account side.