The year 2025 will be a significant turning point for the domestic self-storage industry and mini-storage in Korea. The recent inclusion of the self-storage sector in the National Pension Service's real estate core platform fund investment targets demonstrates that this industry is beginning to establish itself as a major investment sector beyond just space rental services. In this article, we will look into the differentiation strategies that overseas self-storage companies are adopting and discuss the unlimited scalability that self-storage possesses.

United States: UX Innovations Led by Startups

In the United States, which has the oldest and largest self-storage market in the world, efforts are actively being made to acquire customers from the millennial generation. Moving away from an approach that simply values 'cost-effectiveness,' services are evolving to focus on convenience and comfort preferred by younger consumers. Notably, this innovation is being led by relatively new startups rather than established giants like Public Storage and Extra Space.

Self-storage in the U.S. has shown a trend of expanding from large storage facilities located in suburban areas to urban facilities, with recent emphasis on converting idle buildings within city centers into storage spaces. One of the leading companies in this trend is Stuf, a self-storage startup founded in 2020.

This startup is rapidly expanding its business in major cities such as New York, Los Angeles, and Seattle, gaining popularity among young consumers with its clean and bright modern facility designs and excellent accessibility. It showcases examples of converting former lodging or cultural facilities into self-storage, similar to what mini-storage has done by converting bus terminal and cinema spaces into self-storage.

Additionally, Stuf adopts a model that shares operational revenue with property owners instead of following the traditional real estate ownership model. Thanks to this model, Stuf boasts rapid scalability, able to open new locations in just 2 to 3 weeks. This innovative business model has successfully secured $11 million in Series A investment from known entities like Altos Ventures and Allegion Ventures, demonstrating the potential of new self-storage models.

This strategy is also akin to what mini-storage employed until last year in expanding domestic sites. From its early days, mini-storage viewed 'accessibility' as the key to storage use, expanding sites around idle urban spaces close to residences. While sharing profits with building owners facing vacancy issues, it has also established facilities integrated with residential buildings. Through this approach, mini-storage has grown at the fastest rate in the country and has become a good alternative for real estate facing long-term vacancies.

< Examples of urban idle space conversion by Stuf / Source: Stuf >

Another notable startup is Store Ease, established in 2019. Store Ease offers an innovative storage experience utilizing artificial intelligence (AI) through a virtual management platform. Key technologies include a 'Virtual Managers' system that allows remote management of multiple facilities and 'Climate Controlled Storage' using various sensors and IoT technologies. These technologies enable customers to enjoy services conveniently without on-site staff and maintain a pleasant storage environment.

In fact, mini-storage has had a DNA of automation technology since its early days. Mini-storage's automation technology, which enables perfect utilization and operations 24/7 without human intervention, is applied across all 150 sites in the country, increasing the operational efficiency of the buildings. Mini-storage's environmental management system, which operates 24 hours with just 3 people, builds the best operational environment at minimal operational costs.

What can be learned from the transformation in the U.S. market is that the demand for self-storage facilities is increasingly not solely dependent on price but that the importance of user experience is growing. This is the key point that Secon Syndrome considers essential and is also a core competency that has enabled mini-storage to expand sites and customers the fastest in the country.

< Store Ease's technology-based storage infrastructure / Source: Store Ease >

United Kingdom: Providing Various Value-Added Services to Acquire Corporate Clients

Next, let’s look at a representative example from Europe: the United Kingdom. The UK surpasses South Korea in population (68 million people) and per capita GDP ($52,000), with an urbanization rate of 83.9%, similar to Korea's 81.8%. Furthermore, after experiencing rapid industrialization, it currently shares similarities with Korea in having an economic structure centered on knowledge industries and services.

The UK self-storage market began to grow in earnest in the 1990s, and by 2024, the market size is expected to reach approximately €1.08 billion (₩1.61 trillion). Centered around Safe Store (number of sites: 180) and Big Yellow (number of sites: 150), there are about 1,700 operating sites nationwide, with each facility's operational scale reaching 2,000 to 3,000 pyeong.

The Annual Report published annually by the Self Storage Association UK (SSA UK) includes surveys on the state of the UK self-storage market and user perceptions. According to this report, corporate (company) customers account for 27% of all self-storage customers in the UK, representing a significantly high proportion compared to Korea. Corporations use a larger area of storage than individuals and also show a higher long-term usage proportion.

< Current Status of Self-Storage Customer Types in the UK / Source: Self Storage Annual Report 20241 (SSA UK) >

< Status of Corporate Client Industries in UK Self-Storage / Source: Self Storage Annual Report 20241 (SSA UK) >

UK self-storage companies offer various value-added services to attract corporate clients. In addition to inventory management and document storage, they also provide tax and logistics services to support smoother business operations. Some companies act on behalf of clients to manage and distribute specific items they require, enhancing the efficiency of inventory management through inventory monitoring and real-time data updates.

Additionally, customized services for startups are actively provided. For example, Big Yellow and Safe Store offer advisory services necessary for tax reporting and business growth, in addition to simply providing warehouse space as storage for startup clients, thereby assisting them from initial founding to growth. In this way, self-storage companies play a significant role in providing integrated services to corporate clients, thereby enhancing overall business efficiency.

Currently, the proportion of business customers at mini-storage is about 20% and is expected to increase further. There is a need to store documents with set retention periods and a need to quickly source raw materials, inventory, and samples within urban areas. As the era of one-person businesses begins in earnest, led by social media, the demand for self-storage among pre-fulfillment commerce operators is growing. One-person businesses find it difficult to keep products at home, yet expanding directly to fulfillment is somewhat restricted, indicating that consistent demand will continue to form in the future.

< UK Business Storage Provided Services / Source: Big Yellow) >

Japan: Premium Strategy for Differentiated Value Provision

In Japan, where the self-storage industry is most popular in Asia, innovative changes are also taking place. One of the frontrunners is 'Warehouse TERRADA'. Established in October 1950 in the Tennozu area of Tokyo as a grain warehouse, it is a company with a 70-year tradition. However, amidst fierce competition, Warehouse TERRADA is pursuing a premium strategy optimized for storing high-value items to differentiate itself.

Warehouse TERRADA is reconstructing self-storage as a space that preserves and creates cultural value based on the philosophy that "Culture Calls For Creation." Its main target customers are individual asset owners with high-end hobbies, possessing collections that require special storage environments like expensive artworks, jewelry, and wines.

Warehouse TERRADA provides a space to safely store 'culturally valuable objects' owned by these customers and enhance their value. To achieve this, it offers a luxurious storage environment with a rare temperature and humidity control system in Japan.

Additionally, Warehouse TERRADA operates an exhibition space called 'WHAT Museum,' providing a space for clients to showcase their stored artwork to the public. This not only enhances the value of the client's assets but also offers the public an opportunity to appreciate art.

Similarly, in 2022, mini-storage has signed a business agreement with Tycoon P&H, the operator of Korea's largest private complex cultural exhibition hall, 'The Seoul Lightium,' and has been making efforts to support local culture and arts. A mini-storage branch has been opened in Galleria Foret in Seongdong-gu, Seoul, providing space to store exhibition items like artworks, sculptures, and items needed for musical and theater preparations.

< TERRADA Art Storage / Source: Warehouse Terrada>

In addition, the 'TERRADA Wine' service provides storage and management services for fine wines. It not only offers space simply for storing wine but also manages customers' wine information and provides various added services to enhance investment value using digital technology.

< TERRADA Wine Storage / Source: Warehouse Terrada >

As more users adopt mini-storage and a diverse customer base is secured, inquiries for introducing storage facilities specialized for items like artworks and wines are ongoing. The current storage environment provided by mini-storage is also highly suitable for storing artworks or wines, so there may soon be specialized mini-storage facilities emerging. Most importantly, mini-storage's value of prioritizing user experience and customer convenience that transcends both online and offline is likely to be reflected.

Implications for the South Korean Self-Storage Market

The international cases reviewed so far suggest that differentiation is possible through customized strategies even in mature markets. Self-storage is not limited to simply being a service for storing personal items, but can offer various values tailored to customer needs. Furthermore, as evidence of this, the U.S. market, which has matured, continues to show an average annual growth rate in the mid-3% range, confirming that self-storage growth is on a long-term cycle.

In the future, global demand for self-storage is expected to be influenced significantly by customer experiences and specialized services, moving beyond price competition. In this context, it is highly encouraging that mini-storage's services and technology are ahead of any existing global self-storage operators. The facility automation technology, as well as the digitization of customers' storage items using mini-storage Vision AI technology, will be an unprecedented innovative attempt in the global self-storage market.

Additionally, as a seismic shift occurs in the domestic real estate market, self-storage is becoming increasingly prominent, suggesting that the world’s first large-scale self-storage facility with applied automation technology may soon emerge in Korea. In 2025, in what is expected to be the hottest domestic self-storage market, we will continue to share mini-storage's activities.