Where to Hide a Spare Key: Lockbox Guide for Calgary

The safest place to hide a spare key is not outside your home at all. A key under the doormat, in a planter or in a fake rock is the first place a burglar looks. If someone else needs access, a code-based key lockbox bolted to a solid surface, or a keypad deadbolt, is far better, and a spare left with a trusted neighbour beats both for a single person you know well.

Calgary adds its own problems. Chinook melts put water into dials and shackles, and a -30 C cold snap turns that water into ice. A lockbox that works in July can be solid in January, so the choice of box and the way you maintain it matter more here than in a mild city.

Why is hiding a spare key outside a bad idea?

Hiding a key outside is a bad idea because the hiding places are predictable: the doormat, the planter by the door, a fake rock, the top of the door frame, the meter box. Anyone looking for a key checks those first. A hidden key defeats a deadbolt completely and leaves no sign of forced entry.

You are not the first person to think of the flowerpot, and a mass-market fake rock is easy to recognise. A key hidden outside also fails quietly. You will not know someone found it, because nothing is broken.

Calgary adds a second risk. A key taped under a step rail or tucked behind a downspout can freeze to the surface, fall into a drift, or be washed down a window well during a chinook melt, and you will not find it when you need it either.

There is also an insurance angle worth checking. Policies can treat an entry with no sign of force differently from a forced one, so read your own wording or ask your broker.

If you have any key hidden outside right now, move it today. For the wider picture of how burglars actually choose a home, see our guide to securing your Calgary home from break-ins.

What is a key lockbox, and how do the two main types differ?

A key lockbox is a small metal case that holds a key behind a combination or keypad. The two main types are shackle boxes, which hang from a door handle or railing on a looped steel arm, and wall-mounted boxes, which are screwed or bolted to a solid surface. Wall-mounted boxes are the better choice for anything longer than a day or two.

Shackle boxes are the cheap option, typically $20 to $60 at a hardware store (a generic Calgary retail range). Their weakness is the shackle itself. On cheaper boxes it can be cut, and once it is, the whole box can be carried away and opened somewhere else. A shackle box is fine for a short visit and not much more.

Wall-mounted boxes are fixed with screws through the back plate into wood, brick, stucco backing or concrete, so there is nothing to carry off. A die-cast zinc or steel body resists a hammer far better than a stamped, thin-walled case. Look for a box with its fixing screws hidden inside the locked compartment, so a thief cannot simply unscrew it. Expect roughly $40 to $120 for a decent one, again a generic Calgary retail range.

Mounting location matters as much as the box. Put it where a passer-by on the street cannot watch you open it, ideally inside a side gate or on a back wall, and bolt it into a stud, masonry or a solid wood frame rather than into vinyl siding or the sheathing alone. Siding flexes and the box can be pried off it.

One check for condo and townhouse owners: a box fixed to a shared exterior wall or common railing usually needs your board's permission. Ask before you drill, because the exterior is rarely yours alone.

Are lockboxes safe, and can the code be guessed?

A good lockbox is safe against a casual thief and weak against a determined one. A four-wheel dial box has 10,000 possible codes, but a box with no lockout feature can still be worked through by someone patient, and many push-button boxes have far fewer possible codes because the order of the buttons does not matter. The practical protection is a well-chosen code, a hidden position and a rule that you do not leave a spare there for years.

Choose a code that is not your birth year, your house number or 1234. These are the first guesses, and house numbers are printed on the front of your home. Pick something with no connection to you, and do not reuse the same digits as your alarm, your phone or your garage keypad.

Look at the box before you trust it. On a push-button or keypad box, the buttons used most become visibly worn or shiny. If only four buttons look worn, a thief already has the digits, and on a box where order does not matter, that is the whole code. Replace worn boxes and change the code on a schedule rather than waiting for a problem.

The honest limit is this. A lockbox moves the risk from "anyone who finds a key" to "anyone who guesses or watches a code". That is a large improvement, but if the key inside opens your front door, your house is only as secure as the box, the mounting and your discipline about the code.

Where you can, box a key that opens only a low-risk door, such as a shed or a detached garage, which limits what a stolen code costs you. If you have an attached garage with a door into the house, see our note on attached garage security before putting any key near it.

What does a Calgary winter do to a key lockbox?

A Calgary winter can freeze a lockbox solid. Chinook melts let water into dials, keypad housings and shackles, and the next cold snap turns it to ice, so a mechanical dial can seize and a shackle can refuse to release. Choose a box with a rubber cover flap, mount it with the opening angled down, and treat it with a dry lubricant before November.

The usual pattern: a warm afternoon melts snow on the roof, meltwater runs down the wall onto the box, and the temperature drops overnight. By morning the dial will not turn. Do not pour hot water on it, which leaves more water to freeze, and do not use a lighter on a plastic keypad.

A few habits keep a box working:

• Buy a box with a hinged or rubber cover over the dial or keypad, and keep the cover closed.
• Mount it so the opening faces down or sits under an eave, so water runs off rather than in.
• Before winter, spray a dry PTFE or graphite lubricant into the shackle and the dial. Avoid thin oils, which thicken in deep cold and can gum a mechanism.
• Test the code in the first cold week of the season, not the first night you need it.
• Keep a deicer or a small hand warmer in the house for the day it does freeze, and thaw the box gently.

Electronic keypad boxes have a different weak point: batteries. Alkaline cells deliver much less in deep cold, and a box that works at 10 C may be sluggish or dead on a bad morning. Lithium cells hold up better in the cold. Our article on frozen door and car locks covers the thawing steps for the lock on your door, and the same cautions apply to a lockbox.

An old dial box that has sat outside for years can also turn stiff from grit and aged lubricant. If it is stiff, replace it rather than forcing it.

How should you manage the code for contractors, guests and dog walkers?

Treat every code as temporary. Set a fresh code before each new person or stay, give it only to the person who needs it, and change it when they are done. A code that has been the same for two years is a key that the plumber, the previous guest and everyone they told all still hold.

Contractors and tradespeople. A renovation can bring several trades through over weeks. Give one person the code, ask them to tell you before anyone else arrives, and change it on the day the job is signed off. A subcontractor you have never met may otherwise be using the code on a date you did not agree to.

Short-term rental hosts. If you list a Calgary home on Airbnb or a similar service, a lockbox is a common self check-in method, and it is where code discipline matters most. Change the code between every guest, not every month, or a past guest can let themselves in. For a host with turnover every few days, a keypad deadbolt that lets you set a code per booking is usually less work, as we describe below.

Dog walkers, cleaners and regular visitors. A regular visitor can have a standing code, but change it if they stop working for you. Ask them to keep any key off a tag with your address on it, because an address label turns a lost key into a map.

Family. An adult child or a parent helping with the house is the one case where a standing code is reasonable. Even then, change it if the relationship, the household or the plans change. We cover that situation in when to rekey after a breakup.

Whatever the arrangement, one rule helps everyone: write down who has what, and when it was last changed. You cannot manage access you cannot list.

Is a keypad deadbolt better than a hidden or lockboxed key?

For most people who regularly share access, yes. A keypad deadbolt replaces the key with a code on the door itself, so there is no key to hide, lose or duplicate. You can set a separate code for each person, delete one without affecting the others, and nothing is stored in a box on the wall.

Most models keep a regular keyway as a backup. When the contractor finishes, you delete their code and everyone else's still works. It also removes the thief's easiest target, because the hidden key is gone.

The tradeoffs are real. A keypad deadbolt costs more than a lockbox, and the standard installed range for a basic residential deadbolt of $60 to $150 does not include the electronics, so expect to pay more for a keypad model. Batteries are the same issue as above: in a Calgary cold snap a weak battery is a common cause of a keypad lockout, so replace them on a schedule and keep a backup key somewhere you can reach. And the grade of the deadbolt underneath still matters, as covered in our guide to deadbolt grades.

Our article on whether a smart lock is worth it in Calgary covers models and cold-weather limits. The short version is that a plain keypad deadbolt with no wireless features suits most guest and contractor cases, and a connected smart lock is worth adding only if you want remote codes.

You do not need a keypad deadbolt if the only person who ever needs entry is your partner and you both carry keys. A lockbox, or a key given to someone, is cheaper and simpler for a once-a-year visit.

Is it safe to leave a spare key with a neighbour?

Leaving a spare with a neighbour you know well is safe, often safer than any box, as long as the key carries no address and you agree on what the neighbour does with it. The neighbour is a person who can see and judge who is at your door, which a lockbox cannot do.

The weakness is not the neighbour. It is what happens to the key. A key hung on a hook in a front hallway, visible to anyone who visits, is less safe than one kept in a drawer. It is also worth agreeing what happens if they move away or a roommate takes over the place.

Practical steps:

• Tag the key with a code or a first name, never your address.
• Tell the neighbour the key is for emergencies and for named visitors only.
• Ask them to return it if they move, and take it back if you are not sure of the next tenant.
• Cut a key just for them, which keeps your own spares separate and lets you track it.

When you have the key cut, a careful cut from a proper key machine matters, because a poorly cut copy can stick and wear the lock. Our article on why copied keys do not work explains what goes wrong and what "Do Not Duplicate" really covers.

A neighbour is the right choice for a single person you trust and a clear need, like a week away. For repeated, changing visitors, a code is easier to manage because you can cancel it without a conversation.

What should you do when a spare key goes missing?

If a spare key goes missing, treat the lock as compromised until proven otherwise. If you know exactly where it fell and can retrieve it, you may not need to do anything. If it could be anywhere, or anyone could have it, rekey the lock. Rekeying makes every old key useless and typically costs $20 to $60 per lock.

The question to ask is whether you can account for the key. A key lost in your own yard under a snowbank is one thing. A key lost by a contractor, a guest or an ex-partner, or one from a hiding spot that has been disturbed, is another, and you should assume someone else may have it.

A standard pin tumbler lock can be rekeyed so the old keys stop working while the lock stays in the door, which is usually cheaper than replacing it. Our guide on whether to rekey or replace walks through when each makes sense, and the answer for a lost spare is usually rekeying.

Two situations call for more. If the lock is old, worn or low-grade, replacement may be the better value. And if you rent out the property, rekey between tenants as a routine, as set out in rekeying between tenants for Calgary landlords, rather than waiting for something to go missing.

Before you call anyone, look for signs of entry: scuffs near the strike plate, an unfamiliar footprint on the step, a door or window not as you left it. If you see any, do not go in. Call 911 if someone may still be inside; otherwise report it to the Calgary Police Service non-emergency line, then call a locksmith. If you are simply locked out because the spare you hid has vanished, our guide to what to do in a house lockout covers the first steps.

Need a safer way to share a key at your Calgary home?

Whether you want a keypad deadbolt, advice on mounting a lockbox, or a rekey after a spare has gone missing, Key And Lock Solutions can help. We are a family owned and operated locksmith serving Calgary, Airdrie, Cochrane, Chestermere and Okotoks, and we will tell you plainly when a $30 lockbox is all you need.

Our residential locksmith service covers rekeying, deadbolt installation and keypad lock fitting for homes of all ages, from 1960s bungalows to new-build suburbs. If you are not sure what suits your door or your situation, contact us and describe what you need. We will give you honest advice and no unnecessary upsells.