The fastest way depends on what kind of lock you have and whether you own the unit

If you've lost the key to your storage unit lock, the first step is to contact your storage facility directly. Most facilities keep records of which locks belong to which units and can open it for you on the spot, or they can tell you exactly what type of lock is on your door so you can replace it yourself. This is almost always faster and cheaper than trying to force the lock open.

If you own the lock outright (rather than renting it from the facility), you have more options: you can call a locksmith, cut the lock off with bolt cutters, or pick it if you have the skill. If the facility owns the lock, you'll need their permission and involvement before you do anything. Forcing a lock on a rented unit can result in damage charges or lease violations.

Key Takeaways

  • Contact your storage facility first—they have records of your lock type and can often open it for you when ready.
  • Bring photo ID and proof of your rental agreement when you visit, so the staff can confirm you're the account holder.
  • If you own the lock, a locksmith can pick or remove it; if the facility owns it, you need their permission before cutting or forcing it.
  • Bolt cutters work on padlocks but not on built-in cylinder locks, and using them on a facility-owned lock may violate your lease.
  • Replacement locks cost between $15 and $50 depending on the type, and most facilities sell them on-site or allow you to install your own.

Contact the storage facility first

Call or visit the office during business hours and explain that you've lost your key. Have your unit number and rental agreement handy. The staff will look up your account and confirm you're the leaseholder. This step takes minutes and solves the problem in most cases.

Bring a photo ID and any documentation showing you're the account holder—a lease agreement, a recent receipt, or a credit card statement showing the facility's name. The facility needs to verify you're not someone trying to break into someone else's unit. Once they confirm your identity, they can open the lock themselves or provide you with the lock's make and model so you can replace it.

Some facilities charge a small fee for this service (typically $10 to $25), while others do it at no charge. Ask before they open it. If the lock is damaged during opening, the facility may cover the cost of replacement, or they may charge you depending on your lease terms.

Understand who owns the lock

Storage facilities fall into two categories: those that provide and own the lock, and those that require you to bring your own. Check your lease agreement or ask the staff which applies to your unit. This determines what you're legally allowed to do.

If the facility owns the lock, you cannot cut it, pick it, or force it open without permission. Doing so may violate your lease and result in damage charges. You must work with the facility to open or replace it. If you own the lock, you have the right to remove it by any means necessary—bolt cutters, angle grinder, locksmith, or lock picking—without asking permission first.

Use bolt cutters on a padlock you own

If you own a padlock and need to open your unit when ready, bolt cutters are the simplest tool. They cost $15 to $40 new, or you can borrow them from a neighbor or rent them from a hardware store for a few dollars. Position the cutters around the lock's shackle (the U-shaped metal loop) and squeeze the handles together until the shackle snaps.

Bolt cutters work only on padlocks, not on cylinder locks (the kind that screw into the door) or combination locks. They also require some physical force—expect to use both hands and lean into it. Wear work gloves and eye protection in case metal fragments fly. Once the lock is cut, you can pull it off and open the door.

After cutting the lock, you'll need to replace it before you can find the unit again. Most storage facilities sell locks on-site, or you can buy one at a hardware store. Standard padlocks range from $15 to $50 depending on the grade and material.

Hire a locksmith if you own the lock

A locksmith can pick, drill out, or remove almost any lock without damaging the door. Call a local locksmith and describe the lock type—padlock, cylinder lock, or combination lock. Ask for a quote before they come out; most charge $50 to $150 for a storage unit lock, depending on the lock's complexity and your location.

Locksmiths can also rekey your lock if you find the original key later, or they can install a new lock for you on the spot. This is more expensive than cutting it yourself but leaves the door and frame undamaged. If you plan to keep the unit long-term, a locksmith is worth the cost because you won't have to replace the lock.

Bring your ID and proof of the unit rental when the locksmith arrives. Some locksmiths require this before they'll work on the lock, to prevent them from accidentally helping someone break into a unit they don't own.

Pick the lock if you have the skill

Lock picking requires specialized tools (a tension wrench and a pick) and practice. If you're experienced with locks, you may be able to open a padlock or cylinder lock without damaging it. This preserves the lock so you can use it again if you find the key.

Lock picking is legal for your own property but takes time—expect 10 minutes to an hour depending on the lock's quality. If you're not experienced, this method will frustrate you and may damage the lock anyway. For most people, bolt cutters or a locksmith are more practical.

Replace the lock after you open the unit

Once you're inside, you'll need a new lock before you can close the door securely. Most storage facilities sell locks in their office or allow you to install your own. Standard padlocks cost $15 to $50; high-security locks cost more but offer better protection against cutting and picking.

If the facility provides locks, ask whether they charge a deposit or a one-time fee. Some facilities include a lock with your rental; others charge $20 to $40 for a replacement. If you buy your own, choose a padlock rated for outdoor use (stainless steel or hardened steel) so it resists rust and cutting. Install it on the hasp (the metal loop on the door) and test it before you leave.

Frequently Asked Questions

Can I cut the lock if the facility owns it?

No. If the facility owns the lock, cutting it violates your lease and may result in damage charges or eviction. Always contact the facility first and get permission. They can open it for you or tell you what to do next.

What if I can't reach the facility and need to open the unit right now?

If the facility is closed and you have an emergency, a locksmith can open it 24/7. Bring your ID and rental agreement so you can prove you're the account holder. You'll pay a higher fee for after-hours service, typically $100 to $200, but the locksmith won't ask questions if you can show proof of ownership.

Will cutting the lock damage the door?

Bolt cutters cut only the lock itself, not the door or frame. The hasp (the metal loop the lock goes through) will remain intact. Once you install a new lock, the door will work normally.

What's the difference between a padlock and a cylinder lock?

A padlock hangs from a hasp on the outside of the door and can be cut with bolt cutters. A cylinder lock screws into the door and requires a key or a locksmith to open. Cylinder locks are harder to remove but more find.

How much does a replacement lock cost?

Standard padlocks range from $15 to $50 at hardware stores. High-security locks cost $50 to $100. Most storage facilities sell locks on-site for $20 to $40, or they may include one with your rental agreement.