Cost to build a self-storage facility
A direct answer on the cost to build a storage facility in 2026, the variables that actually move the number, how much to build storage units across single-story, multi-story, and climate-controlled formats, and how to read a contractor estimate so closeout holds no surprises.
Self storage cost depends on far more than square footage. Two facilities of identical size in the same state, finished to the same level, regularly land 35% apart on bid day, with the spread driven by site work, building type, door count, and structural design. Below is the framework we use to size up the cost to build a self storage facility, along with the line items that swing the storage facility cost the most.
These ranges reflect 2026 conditions in the Mountain West. Steel and labor pricing can move quickly, particularly under the current tariff environment, so treat the price to build storage units as a planning range rather than a quote. Once a real site and a real plan are on paper, the cost to build self storage tightens considerably.
For owners and developers asking how much does it cost to build a self storage facility today: the all-in number for a single-story drive-up usually lands between $70 and $110 per rentable square foot in the Mountain West. Multi-story and climate-controlled run higher. The rest of this guide breaks down where that number comes from across building shell, site work, utilities, soft costs, and FF&E, so you can sanity-check a contractor estimate against the site you actually have.
Cost to build storage units, by building type
Self storage is priced per rentable square foot, never per gross. Drive aisles, walls, and hallways are gross-square-foot costs that the rentable space has to absorb. A facility with weak space efficiency will look reasonable on a per-gross basis and miserable on a per-rentable basis. Compare on rentable, every time.
- 01Single-story drive-up
$30 to $55 per rentable square foot. A slab on grade, a single-story metal shell, and individual roll-up doors. The most efficient cost basis in self storage when land economics support it.
- 02Multi-story interior corridor
$65 to $110 per rentable square foot. Elevators, fire suppression, interior corridors, and a real weather envelope. You go vertical when land cost forces the geometry.
- 03Climate-controlled add
Layer roughly $15 to $30 per rentable square foot on top of the base building. HVAC capacity, insulated panels, vapor barrier, conditioned hallways.
- 04Boat and RV enclosed
$40 to $75 per rentable square foot. Tall eaves and oversized doors push cost up, while the larger unit footprint pulls the per-rentable number back down.
- 05Boat and RV canopy or covered
$18 to $35 per rentable square foot. Open-air or three-sided. Fastest path to revenue when the jurisdiction allows it.
How much to build storage units, by facility size
Per-square-foot ranges set the bounds, but most owners want a directional dollar figure for a facility of a specific size. The numbers below pair typical 2026 Mountain West construction costs with rentable square footage to answer the "how much to build storage units" question for the most common project sizes. These figures cover the building shell, doors, and slab. Add roughly 30% to 60% on top for site work, utilities, soft costs, and FF&E to land at all-in project cost.
- 015,000 RSF single-story drive-up
$150,000 to $275,000 for the shell and doors. All-in project cost typically $350,000 to $700,000 once site, utilities, soft costs, and FF&E are layered on.
- 0210,000 RSF single-story
$300,000 to $550,000 shell. All-in $700,000 to $1.4 million depending on site difficulty and finish level.
- 0325,000 RSF single-story
$750,000 to $1.4 million shell. All-in $1.8 to $3.5 million.
- 0450,000 RSF single-story
$1.5 to $2.75 million shell. All-in $3.5 to $7 million.
- 0575,000 RSF single-story
$2.25 to $4.1 million shell. All-in $5.25 to $10.5 million.
- 0650,000 RSF multi-story interior corridor
$3.25 to $5.5 million shell. All-in $5 to $9 million depending on elevators, fire suppression, and finish.
- 07100,000 RSF multi-story
$6.5 to $11 million shell. All-in $10 to $18 million.
- 08Climate-controlled add-on (per 25,000 RSF)
Layer roughly $375,000 to $750,000 on top of the base building for HVAC, insulated panels, vapor barrier, and conditioned hallways.
What the storage building cost does not include
A "$45 a foot" quote begs an obvious question: what is in the number, and what is not. The building shell is one slice of the storage facility cost picture, and first-time owners regularly run short on capital because they treated the building bid as the project bid. The two are different documents, and the self storage building cost line is only the beginning of the project budget.
- 01Land
Acquisition, holding cost, financing, and due diligence (geotech, survey, Phase I).
- 02Site work
Earthwork, retaining, paving, curb and gutter, storm drainage, landscaping. Often $8 to $25 per gross square foot of building. A bad site can run past $40.
- 03Utilities
Power, water, sewer, fiber. Highly site-specific. Utility extensions on otherwise comparable sites have run anywhere from $40,000 to over $500,000 in our experience.
- 04Soft costs
Architectural and civil engineering, permit and impact fees, legal, financing, project management. Typically 8% to 15% of hard costs.
- 05FF&E and tech
Office buildout, gates, security cameras, access control, kiosks, signage. $3 to $10 per rentable square foot.
- 06Contingency
Carry 5% to 10%. If the site has unknowns (fill, water table, rock), carry 10% or more.
What actually moves the number
Two projects that look identical on paper can still bid 30% apart. The biggest swing factors, in roughly the order they show up:
- 01Site conditions
Cut and fill volumes, rock excavation, high water table, peat or fill, retaining wall heights. Site alone is a $5 to $20 per square foot swing.
- 02Snow and wind load
A 100 psf snow load building uses substantially more steel than a 30 psf one. Mountain markets pay for it directly in the steel package.
- 03Seismic category
Higher seismic categories (D, E, F) demand heavier connections, more bracing, and stricter inspection. That covers most of the Wasatch Front and the Eastern Idaho fault zones.
- 04Door count
Roll-up doors run roughly $400 to $900 each installed. Smaller average unit size means more doors per square foot, which raises the per-rentable cost.
- 05Hallway width and module choice
A 5-foot interior hallway versus a 6-foot one swings rentable efficiency by 4% to 6%. That compounds through the per-rentable math for the life of the asset.
- 06Finish level
Stucco vs. metal panel, glass storefront vs. punched windows, parapets and articulation. Easily $3 to $12 per gross square foot before you notice it.
How to read a contractor estimate
Insist on bids broken out by category, never as one lump sum. A line-itemed bid lets you compare two contractors apples to apples and gives you something to renegotiate when the all-in number runs high. We tell every owner to require these:
- 01Steel and erection broken out from foundation and slab
- 02Site work broken out from the building
- 03Doors counted separately with the door schedule attached
- 04Allowances called out (paving thickness, concrete strength, finish materials)
- 05Exclusions in writing, what is NOT in this bid
- 06A schedule with milestone dates for steel arrival, foundation pour, dry-in, and substantial completion
A working budget framework
For early pro-forma work, before a real bid is in hand, this is a fair allocation of self storage construction costs for a single-story facility on a typical site:
- 01Building shell and doors
50% to 60% of hard costs
- 02Site work and utilities
20% to 30% of hard costs
- 03FF&E, gates, tech, signage
5% to 10% of hard costs
- 04Contingency
5% to 10% of hard costs
- 05Soft costs (on top of hard cost)
8% to 15% of hard costs
“Two facilities of identical size in the same state regularly land 35% apart on bid day. Site, snow load, and door count carry most of the spread.”
Questions
For a single-story drive-up self storage facility in the Mountain West, the building shell and doors typically run $30 to $55 per rentable square foot. Once you add site work, utilities, soft costs, and FF&E, all-in project cost most often lands between $70 and $110 per rentable square foot. Climate-controlled and multi-story carry a meaningful premium on both numbers.
A 10,000 square foot single-story drive-up facility usually costs $300,000 to $550,000 for the building shell and doors. With site work, utilities, soft costs, and FF&E, the all-in project cost generally lands between $700,000 and $1.4 million depending on the site, market, and finish level. A difficult site pushes the number higher.
In most markets, building new comes in around 70% to 85% of the cost per rentable foot of buying a stabilized facility. The trade-off is 12 to 24 months of lease-up before the building produces real cash flow. Buying gets you cash flow on day one, at the cost of the development margin. The right answer depends on your cost of capital, hold period, and tolerance for lease-up risk.
Open-air boat and RV canopies are the cheapest per gross square foot because the design carries no walls or doors. For traditional self storage, a single-story drive-up with metal panel exterior on a flat, well-drained site is the lowest-cost format you can put up.
A single-story self storage facility typically runs 6 to 9 months from groundbreaking to certificate of occupancy. Multi-story and climate-controlled run 9 to 14 months. Permitting and pre-construction add another 3 to 6 months on top, so plan accordingly.
Gross is the total building footprint, walls, hallways, mechanical, and the office. Rentable is the unit interior space that actually pays rent. Rentable typically runs 75% to 88% of gross depending on building type and hallway width. Always price per rentable; gross can hide a poor floor plan.
The average storage building cost in 2026 runs $30 to $55 per rentable square foot for single-story drive-up, $65 to $110 for multi-story, with climate-controlled adding $15 to $30 on top of either. The cost to build a storage unit individually is roughly $400 to $900 for the door alone, plus its share of the surrounding shell, slab, and site work. Always anchor the conversation to per-rentable-foot, not per-door, when comparing builds.
For a single-story drive-up self storage facility in the Mountain West, expect $30 to $55 per rentable square foot for the building shell and doors, then $40 to $75 per rentable foot on top for site work, utilities, soft costs, and FF&E to reach all-in project cost. A 10,000 rentable foot single-story typically runs $700,000 to $1.4 million all in. A 50,000 rentable foot facility runs $3.5 to $7 million. Multi-story and climate-controlled carry a meaningful premium on both lines.
For a typical Mountain West single-story drive-up self storage facility on a clean site, expect a total project cost of $70 to $110 per rentable square foot, all in. A 10,000 RSF facility lands $700,000 to $1.4 million, a 25,000 RSF facility runs $1.8 to $3.5 million, and a 50,000 RSF facility runs $3.5 to $7 million. Costs scale roughly linearly until you cross into multi-story or add climate control, both of which carry meaningful premiums.
The price to build storage units in 2026 starts at roughly $70 per rentable square foot all-in for a clean single-story drive-up site and runs to $160 or more per rentable foot for a multi-story climate-controlled build in a difficult market. Per-door pricing is misleading because it does not normalize for unit size, hallway efficiency, or site conditions. Always anchor a price comparison to per-rentable-square-foot, all-in.
Self storage construction costs in 2026 break into five buckets. Building shell and doors run $30 to $110 per rentable square foot depending on type. Site work runs $8 to $25 per gross foot of building, more on difficult parcels. Utilities are highly site-specific, with service extensions ranging from $40,000 to over $500,000. Soft costs (engineering, permits, impact fees, legal, financing) run 8% to 15% of hard cost. FF&E plus contingency runs 10% to 20% of hard cost. Tariff exposure on imported steel is a real planning risk, so carry contingency at the top of the range.
The self storage building cost (shell and doors only, before site and soft costs) runs $30 to $55 per rentable square foot for single-story drive-up, $65 to $110 for multi-story interior corridor, with climate-controlled adding $15 to $30 on top of either. Boat and RV enclosed lands $40 to $75 per rentable foot, and open canopies are cheaper at $18 to $35. These ranges reflect 2026 Mountain West conditions; coastal markets and union markets routinely run 20% to 40% higher.