Five Realistic Second Lives
Once a big-box tenant leaves, the building rarely gets another one. What it does get is a conversion, and in 2026 five uses account for most of them: self-storage, indoor sports, controlled-environment agriculture, event space, and residential. They look similar on a site plan and behave nothing alike as businesses.
The right comparison is not cost per square foot. It is capital required, operating intensity, entitlement risk, and how fast revenue starts.
Self-Storage: Lowest Operating Intensity
Storage converts for roughly $35 to $70 per square foot in hard costs and then runs on a fraction of a full-time employee per facility once automated access is in place. There is no inventory, no food safety, no scheduling, and no staff turnover problem. That operational simplicity is the entire appeal, and it is why institutional capital keeps chasing it.
The costs are a slow 24-to-36-month lease-up, a softening rent environment, and zoning departments that increasingly do not want storage in their commercial corridors. Full detail is in our big-box retail to self-storage guide.
Indoor Pickleball: Highest Revenue per Foot, Highest Effort
A pickleball facility generates far more revenue per square foot than storage and reaches meaningful revenue within months rather than years, because court bookings and league play start the week you open. It also needs staff, programming, membership management, and an acoustic treatment budget that surprises everyone.
The clear-height requirement is stricter than storage — you need genuine unobstructed height over the courts — so a marginal box that would work for storage may be disqualified outright. Our warehouse to pickleball facility breakdown and facility cost analysis cover the trade.
Indoor Vertical Farming: Capital-Intensive and Crop-Dependent
Vertical farming is the most capital-intensive option on this list by a wide margin, and its economics live or die on electricity price and crop selection. A box with heavy existing electrical service in a market willing to pay for local greens is a real opportunity; the same box in a high-power-cost market is a way to lose money efficiently.
It also carries a food-safety regulatory layer none of the others have. See our vertical farm startup cost analysis for what that actually requires.
Event Venue: Cheap Build, Lumpy Revenue
An event venue is often the cheapest conversion of the five — you are largely cleaning, lighting, and adding restrooms and a kitchen to a big open room — and it monetizes the one thing a big-box store has in abundance, which is uninterrupted floor area with parking attached.
The catch is revenue shape. Bookings are seasonal, weekend-weighted, and highly competitive in most metros, and the assembly occupancy classification brings egress and life-safety requirements that storage does not. Our warehouse to event venue guide covers the build.
Residential: The Hardest Entitlement, the Biggest Upside
Converting retail to apartments produces the highest value per square foot and is by far the hardest to entitle. You need a residential rezoning, natural light and egress for every unit — which a deep floor plate physically fights — full plumbing distribution, parking ratios, and often an affordable-housing negotiation.
Where it works, it works enormously well, and municipalities that block storage will often fast-track housing. Our office to apartments guide and church to apartments guide both cover an entitlement path that transfers cleanly to a retail shell.
How to Actually Choose
Work backward from three constraints. First, the zoning use table: eliminate anything your district will not permit without a rezoning you cannot win. Second, clear height and column spacing, which disqualify uses faster than any budget does. Third, your own tolerance for operations — storage is a real estate business, pickleball and events are hospitality businesses, and vertical farming is manufacturing. People who want passive income and choose an operating business are the ones selling at a loss in year three.
For a broader ranking of conversion uses by market, see our big-box conversion rankings, and compare total cost across formats with the conversion cost calculator.