StaxUP Storage San Marcos facility exterior on E Mission Rd with gated access, office building, and spacious driveways under clear Southern California skies.

What You Should Never Store in a Unit | San Marcos CA

Admin | November 25, 2025 @ 12:00 AM

If you’re looking for temporary storage to free up space fast, when you search for storage units San Marcos CA, or "storage near me," it’s likely because you want to quickly create space — either while you move to San Marcos CA, you're renovating, downsizing, or if you're a CSUSM student who needs to use your CSUSM student storage unit between semesters. However, there are still many restrictions to what can be placed in a San Marcos self storage unit, depending on the size of the storage unit you rent (e.g., 5x10 storage San Marcos, etc.). Some items are dangerous to place in a storage unit, some items violate California laws, and some items will perish due to heat and/or lack of proper storage conditions in a San Marcos storage unit.

Below are the top items that should never be put in your 5x10 storage San Marcos CA or 10x15 storage San Marcos CA (or other sizes).

Perishable or Food Items

The number one reason for pest infestation in a storage unit is food. Although sealed snack foods, canned goods, spices, and pet food will deteriorate in a storage unit in San Marcos CA due to the high temperatures, which will lead to rodent attraction.

Plants, Living Things, or Animals

None of the storage facilities in San Marcos allow anything living, including animals. Most plants cannot live without air flow or natural sunlight, and most potting soils retain moisture which creates mold. In addition, California law does not permit the storage of any type of animal for any amount of time.

If you are moving to San Marcos CA and you have plants you wish to keep for the short term, store them at home until you can find a longer term solution, or give them away to a neighbor or friend.

Flammable, Hazardous, or Chemical Substances

Under California law, nothing that is flammable or produces fumes can be stored. So, this list of items include gasoline, oil, propane tanks, corrosive cleaning products, fireworks, paint, auto fluids, pesticides or anything as such.

Firearms, Ammunition, or Prohibited Items

The state law denies the storage of firearms and any other illegal materials. These restrictions exist to ensure the safety of customers, employees, and property owners of the storage facility and apply to all San Marcos storage units available.

Money, Valuables, or Highly Valued Personal Property

A storage unit is NOT a safe place to store money, jewels or highly valued personal property. Due to the security features in place (i.e., video monitoring systems, secured gates) and the fact that a storage unit is essentially an open container, a storage unit should never be considered a personal safe or a safe deposit box.

Sensitive Medical Equipment or Important Documents

Due to the potential for degradation over time and possible violation of customer's rights to confidentiality, prescriptions, medical test samples, and documents containing personal identifiable information should never be stored in a storage unit.

Vehicle or Trailer Storage That Does Not Adhere To California Laws

If you are renting storage units in San Marcos, and plan to store a vehicle or trailer in your rented unit, there are additional regulations to follow. Many people who rent storage units in San Marcos ask about vehicle storage North County or RV storage San Marcos, and yes — some storage facilities do provide designated parking areas for vehicles. However a vehicle must meet the following requirements:

  • Be drivable and operable
  • Be registered and insured
  • Have all fuel drained or lowered to legal limits
  • Have been approved prior to being allowed in the unit by the management of the storage facility

Some trailers may be too large to fit in a typical storage unit, and must therefore be stored in the designated area outside the unit.

Things That Will Perish in Heat

In San Marcos, heat can destroy:

  • Candles
  • Makeup and cosmetics
  • Vinyl records
  • Wax crayons and wax supplies
  • Aerosol cans

These can be stored in a Climate-controlled storage unit in San Marcos

Why These Restrictions Are Important

These restrictions help prevent:

  • Fires and chemical reactions
  • Pests
  • Damage to the storage facility
  • Potential health issues
  • Violations of California law

By understanding what items are not permitted in your San Marcos storage unit, you are protecting yourself and the items of your neighbors who also rent storage units at StaxUP Storage San Marcos.

Alternatives For Restricted Items

There are alternatives to storing restricted items in a storage unit in San Marcos:

  • Store your valuable items and important documents at home
  • Deposit irreplaceable items with a bank
  • Park RVs, boats, and cars in designated outdoor lots rather than inside a closed unit

Picking the Correct Storage Space in San Marcos

StaxUP Storage San Marcos offers various storage unit sizes for rent ( 5x10, 10x15) ranging from student options to large spaces ideal for contractors and businesses. The facility is located on E Mission Road in San Marcos.

If you have any questions please feel free to call us at (760) 334-4976 or visit us at this address: 458 E Mission Rd, San Marcos, CA, 92069.

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