Cardiff Storage Units

Cheapest self storage units in Cardiff with 24hr access and 24 hour monitored CCTV. Personal, business and student self storage. Simply sign up online or if you prefer give us a call, we're happy to help.

Header banner image
24 hr Access Self Storage
Pin Code Access
24 hr CCTV
50% Off For First Month!

Our location

Self storage units

Self storage facility in Cardiff offering flexible storage solutions

Our self storage units can be used for a variety of things, a 20ft self storage unit can hold 2 small cars or the contents of a 3 bedroom house.

Some of our Cardiff self storage units are 10ft containers, they easily hold outdoor activity equipment, kayak's, bikes, quads etc.. or the contents of a small house or flat.

Self storage units are a great option for document archives, but at a fraction of the cost of the larger national companies.
Book Now

Self Storage for every occasion

Use case 1 image

Self storage in Cardiff

We have the right size storage space at the right price with M3 Self Storage. Whatever your needs, and for however long, you’re in safe hands. You’ll get a new, clean, and secure drive up storage unit, with a heavy duty lock box, We supply a high security padlock and you get the key. You will have a unique code for main gate and have unlimited 24/7 storage unit access, you can come and go as often as you like. If your plans change, don’t worry, our staff will always be on hand to offer friendly advice whenever needed. Storage Cardiff has never been easier. Our storage facilities are within 10 minutes of the Cardiff city centre. M3 storage facilities will beat the price on any Cardiff storage unit.

Use case 2 image

Business storage & Personal storage

Whatever the size of your business we’ve got the self storage solution to all your business needs at the very lowest price. Our self storage facility gives you instant access 7 days a week to flexible self storage space, as your business needs grow, you can grow your storage units with us and only pay for the space you need. You have access to your drive up storage unit 24/7 and your goods are safe with us with our 24 hours a day CCTV and controlled gate access to give you peace of mind. M3 Self Storage facilities are perfectly located next to major roads in Cardiff, just off the A48 & 4 mins from the M4 jct 30. Storage Cardiff made simple. Our Cardiff facility is always open!

Use case 3 image

Student storage

We have small affordable units, perfect for storing the contents of a dorm room, or some luggage and boxes. What to do with all of your belongings when moving house over the holidays? Our self storage facilities offer easily accessible, clean, dry and cheap student storage. Cardiff Met is within 10 minutes of us. For short or long term storage, we understand that price is very important and this is why we guarantee not to be beaten on any comparable quote! Find cheaper storage prices at other Cardiff self storage companies and we’ll not only match it, but we will also beat it. That’s the M3 Self Storage price guarantee! For your convenience you can book your unit online in minutes and move in the very next day. Storage Cardiff hassle free.

Get started in three easy steps:


Choose your storage unit size

Don't worry, you can change size at any time (if available)


Decide your move in date

Choose the day that most suits you for move in


Secure your container

Cancel for free anytime 24 hours before your move in date

Getting started

What our customers are saying

“Great owner. Always helpful. Fab location and quality containers and locks. Highly recommend.”

Leon Brown

“Quick and easy to access 24/7 hrs 365 days. Rates are varying depending on your individual needs. I would recommend M3 to anyone requiring short or long term storage. Thankyou ”


“Highly recommend! Fantastic location with quick and easy 24/7 access. New and clean storage containers. Superb value for money. Excellent customer services. Definitely 100% recommend.”


About us

M3 Self Storage is a family run storage facility. We offer affordable self storage in Cardiff. Customer satisfaction is our first priority and we pride ourselves on this.

Pontprennau is the home of our Self storage Cardiff site that will not be beaten on price. We're friendly professional people so please get in touch to secure your container today! 

We only use brand new storage units, each storage unit is wind and water tight and free from any condensation, this due to our containers being purpose built storage units manufactured with 14 vents to aid circulation.

Cardiff self storage has never been so cheap and easy, simply book online or give us a call.
About image