Back to blog
9 min readCommercial Mortgages

Self-Storage Finance: How to Fund a Self-Storage Facility

Self-storage is a trading business as well as a property, so lenders assess occupancy and profit alongside the bricks. Here's how to fund a self-storage facility in the UK.

Can you get finance for a self-storage facility?

Yes. Specialist commercial lenders fund self-storage facilities across the UK, but they treat them as trading businesses rather than plain property. A self-storage site earns its money from occupancy and unit rents, so its value and its borrowing capacity depend on how well it trades, not just on the building's floor area. A commercial mortgage on a well-occupied, profitable facility is achievable, provided it goes to a lender that understands the sector.

Self-storage has grown into a resilient asset class with attractive margins, but it sits between straightforward industrial property and full trading businesses, which is why the right lender match matters.

Trading value versus bricks-and-mortar value

This distinction is the heart of self-storage finance. There are two ways to look at the same building:

  • Bricks-and-mortar (vacant possession) value: what the empty building is worth as an industrial or storage shell, ignoring any business.
  • Trading (going-concern) value: what the operating business is worth, based on its sustainable profit and occupancy.

A busy, well-run facility is usually worth considerably more as a going concern than as bare bricks, because the income stream has real value. A newly built or empty facility with no trading history, by contrast, is closer to its bricks-and-mortar value until occupancy builds. Lenders lend against whichever basis fits the situation, and this drives how much they will advance. An established site can support a larger loan on its trading value; a lease-up site is lent against more cautiously.

Why occupancy and EBITDA drive the loan

Because self-storage is a trading asset, lenders focus on two linked measures:

  • Occupancy: the percentage of lettable space actually rented, and how stable it is. High, steady occupancy signals durable income.
  • EBITDA: earnings before interest, tax, depreciation and amortisation — a clean measure of the operating profit the site generates before financing. It is the figure lenders use to test how much debt the business can service.

Lenders apply a debt service coverage ratio to the EBITDA to check the profit comfortably covers the mortgage, typically wanting cover of at least 1.3 to 1.4 times for a trading asset like this. Strong occupancy and healthy EBITDA are the two biggest levers on both the loan size and the rate.

How much deposit do you need?

Deposits reflect the trade-related nature of the asset:

  • Established sites with strong, evidenced occupancy and profit: around 30% to 35%.
  • Newer sites still filling up, or first-time operators: often 40% or more.
  • Development or conversion of a new facility: typically funded differently, with a lower loan against cost or value until the site is trading.

Owner-operator versus investment self-storage

There are two broad routes into self-storage finance:

  • Owner-operator: you buy and run the facility yourself. Lenders assess the trading accounts and your experience, much like other owner-occupied trading assets. Your operational track record carries real weight.
  • Investment: you buy a facility let to, or operated by, a third party under a lease or management arrangement. Here the assessment leans more on the strength and terms of that income, closer to a standard commercial investment property case.

A pure owner-operator deal on a trading site is judged largely on the numbers the site produces and your ability to run it. Many self-storage buyers come from a property or industrial background, and that experience helps a lender get comfortable.

What do self-storage lenders assess?

Expect a lender to look at:

  • Two to three years of trading accounts, or a detailed business plan and forecasts for a new or converting site.
  • Current occupancy, unit mix and pricing, plus the trend over time.
  • EBITDA and the resulting debt service coverage.
  • The property itself — location, access, security, condition and its underlying value as an industrial or storage building.
  • Your experience operating self-storage or a related property business.

Because a self-storage building is often a converted or purpose-built industrial shell, its underlying bricks-and-mortar value provides a useful floor of security, which lenders find reassuring compared with more specialised trading assets. Our guide to industrial and warehouse mortgages covers that side of the asset.

How do you fund a self-storage purchase efficiently?

Self-storage sits in a specialist niche where not every lender has appetite, so matching to the right ones is decisive. Assesr takes your figures — occupancy, EBITDA and the property — and builds a lender-ready credit paper in around 60 seconds, then matches it to specialist commercial lenders that fund self-storage. It is free to submit, and you pay the 0.5% Assesr Fee on drawdown, a quarter of the typical broker fee, with nothing until completion.

Frequently asked questions

Can I get a commercial mortgage on a self-storage facility?

Yes, through specialist commercial lenders. Because self-storage is a trading business, lenders assess occupancy, revenue and profit alongside the property, often on a going-concern basis rather than bricks-and-mortar value alone.

How much deposit do I need for a self-storage facility?

Typically 30% to 40% of the price or value. Established sites with strong, evidenced occupancy and profit can achieve the lower end, while new or lease-up sites usually need more to reflect the unproven income.

How do lenders value a self-storage business?

Trading self-storage is usually valued on a going-concern basis reflecting sustainable EBITDA and occupancy, not just the square footage. A vacant or newly built facility with no trading history is closer to bricks-and-mortar value until occupancy is proven.

A

Assesr

Development finance marketplace

Get your development finance sorted with Assesr

Assesr matches property developers with the right lenders in hours, not weeks. Submit your deal and get lender-ready credit papers, competitive quotes, and expert support — all in one place.