Inland Empire Warehouse Availability: Which Cities Have the Most Space?

Inland Empire warehouse availability is concentrated. In Apex’s analysis of CoStar data for Q3 2026, three of CoStar’s 15 submarkets hold more than six of every ten vacant industrial square feet, led by the Airport Area, which includes Ontario, Rancho Cucamonga and Fontana.

The direct answer

Which Inland Empire Cities Have the Most Available Warehouse Space?

That answer uses vacant space, which CoStar reports for all 15 submarkets. Available warehouse space in the Inland Empire is larger, because CoStar’s availability also counts all sublease space and space under construction. For how the same submarkets price on sale, see our guide to Inland Empire industrial cap rates.

The ranking

Inland Empire Industrial Vacancy by Submarket (CoStar, Q3 2026)

By vacant square feet, the Airport Area leads by a wide margin, followed by San Bernardino and Moreno Valley/Perris. It is also the largest submarket, with 32.6% of the metro’s inventory, so its lead reflects size: its 8.2% vacancy rate sits below the metro’s 8.7%.

CoStar submarket	Vacant SF	Vacancy rate	12-mo net absorption (SF)	Under construction (SF)
1. Airport Area	21,266,961	8.2%	(862,131)	5,583K
2. San Bernardino	11,222,592	10.5%	2,333,201	570K
3. Moreno Valley/Perris	10,772,180	9.6%	5,381,308	1,998K
4. Riverside	6,199,809	7.5%	(1,054,652)	0
5. Mojave River Valley	4,481,940	13.4%	874,689	2,500K
6. Chino/Chino Hills	3,550,965	6.2%	(595,985)	0
7. Beaumont/Hemet	3,033,356	19.7%	(2,410,007)	312K
8. Corona/Eastvale	2,979,632	7.5%	(654,563)	0
9. Redlands/Loma Linda	2,779,295	8.2%	1,607,992	0
10. South Riverside	1,330,866	5.4%	359,935	3,057K

By rate, Beaumont/Hemet runs highest of all 15 submarkets at 19.7%, up from 1.1% at the end of 2025; Mojave River Valley (13.4%) is next in the table. Beaumont/Hemet, Riverside and the Airport Area posted the largest negative 12-month net absorption: more space vacated than occupied. Moreno Valley/Perris absorbed the most, about 5.4 million SF.

Two different measures

Is Vacant the Same as Available? The Inland Empire Industrial Availability Rate

No. Vacancy counts only empty space; availability is broader. CoStar puts Inland Empire industrial vacancy at 8.7% and the availability rate at 12.5%, a 15-year high. CoStar says availability often runs ahead of vacancy “due to the inclusion of all sublease space and under-construction supply.”

For warehouse and distribution buildings — CoStar’s logistics subtype — vacancy is 9.5% and availability 13.6%. Market-wide, sublease space is 19% of all availability and trades at a discount of more than 20% to direct space. Nearly 75 million SF of new industrial space has been completed since 2023, and 25% of it is still available for lease. In CoStar’s Riverside submarket, several large buildings marketed while still occupied by outgoing tenants have pushed availability to an all-time high of 11.5%, against 7.5% vacancy.

Submarkets vs city limits

How Do Inland Empire Industrial Submarkets Map to Cities?

Loosely. CoStar reports 15 submarkets, and their lines are CoStar’s research boundaries, not city limits.

For the metro-wide picture, see our Inland Empire industrial market overview and our quarterly market reports.

Availability by submarket

Which Inland Empire Submarkets Have the Highest Availability Rates?

Beaumont/Hemet, by a wide margin, among the nine submarkets in the CoStar Q3 2026 submarket reports Apex analyzed. Its availability rate is 24.0%, nearly double the metro’s 12.5%, and Coachella Valley’s 5.7% is the lowest of the nine. These reports stop at the submarket level, so a submarket is the closest read on any city.

CoStar submarket	Availability rate	Vacancy rate	Logistics availability	Under construction (SF)
Beaumont/Hemet	24.0%	19.7%	29.8%	312,206
Moreno Valley/Perris	14.7%	9.6%	14.5%	1,998,089
Redlands/Loma Linda	13.3%	8.2%	13.8%	0
San Bernardino	13.3%	10.5%	14.1%	569,798
Airport Area	12.8%	8.2%	13.7%	5,583,405
Mojave River Valley	12.5%	13.4%	14.6%	2,500,000
Riverside	11.5%	7.5%	14.3%	0
South Riverside	10.5%	5.4%	11.7%	3,057,152
Coachella Valley	5.7%	4.3%	5.1%	5,084
Inland Empire (all 15 submarkets)	12.5%	8.7%	13.6%	14,025,734

The Airport Area, which includes Ontario, Rancho Cucamonga and Fontana, sits at 12.8%, near the metro rate; its logistics buildings run 13.7%. Among the four largest submarkets by inventory, Moreno Valley/Perris runs highest at 14.7% and Riverside lowest at 11.5%. Availability runs above vacancy in every row except Mojave River Valley, where CoStar prints 12.5% availability against 13.4% vacancy.

For rents by submarket, see what warehouse space costs in the Inland Empire.

One source, two quarters

Why Do Inland Empire Warehouse Vacancy Rate Figures Differ by Source?

Each research firm tracks a different inventory base and period, so the same market produces slightly different rates. Compare a source with its own earlier quarters, as the CoStar figures below do.

CoStar series (period)	Inventory tracked (SF)	Vacancy	Availability	Under construction
Market (Q1 2026)	794,791,129	8.6%	12.2%	10,307,703 SF
Market (Q3 2026)	795,864,262	8.7%	12.5%	14,025,734 SF
Logistics (Q1 2026)	675,556,995	9.3%	13.0%	10,056,726 SF
Logistics (Q3 2026)	675,577,960	9.5%	13.6%	13,564,028 SF

The direction is up: between Q1 and Q3 2026, CoStar’s vacancy edged up from 8.6% to 8.7% and availability from 12.2% to 12.5%, while space under construction rose from 10.3 million to 14.0 million SF. CoStar calls the upward drift in availability over the past two years “more subdued” than the rapid increase of 2022 and 2023.

Sublease space still makes up 19% of total market availability, per CoStar. In the Airport Area it measures 4.3 million SF, or 1.6% of inventory; in Moreno Valley/Perris, 4.2 million SF, or 3.7%.

The pipeline

Where Is New Warehouse Space Still Coming?

In a few submarkets, and far less than at the peak. CoStar counts 14.0 million SF under construction in Q3 2026, up from 10.3 million SF in Q1 but well below the 45.7 million SF high-water mark of 2022; CoStar says the pipeline has “thinned substantially.”

Pre-leasing decides how much you can lease: 52.4% of that total is pre-leased. The Airport Area now has the largest pipeline at 5.58 million SF, only 29.6% pre-leased. Mojave River Valley’s 2.5 million SF is a single building, 100% pre-leased, while San Bernardino’s 570,000 SF shows 0% pre-leased, so none of it is committed yet.

CoStar also notes national developers have started speculative construction on three buildings over 1 million SF, two in Menifee and one in Ontario, and says mid-sized deliveries have increasingly extended southeast into Norco, Corona and Perris. In CoStar’s houseview forecast, vacancy declines, to 8% in 2027 and near 7% by the end of 2028, on slower supply growth and stronger absorption.

Size matters

Does Building Size Change How Much Space Is Available?

Yes, sharply. CoStar puts availability at 18% in 250,000–500,000 SF buildings, around 14% at 100,000–250,000 SF, in the 12% range at 500,000 SF and up, 10% at 50,000–100,000 SF, and under 7% below 50,000 SF.

Recent mid-sized deliveries are especially soft: roughly 75 buildings of 100,000 to 500,000 SF delivered since 2024 are 70% available, per CoStar. Small-bay users have less choice than the metro rate implies. Need yard more than building? Compare industrial outdoor storage (IOS) as well.

Putting it to work

How Should a Tenant Use Inland Empire Warehouse Availability Data?

As a shortlist: reports show where to look; a current survey shows what you can lease. For the fuller list of site factors, see our guide to warehouse site selection.

Our tenant representation work starts with that survey; see also how to lease commercial property, current Apex listings, or buying a warehouse with an SBA 504 loan.

Common questions

Inland Empire Warehouse Availability: Frequently Asked Questions

Which Inland Empire city has the most vacant warehouse space?

CoStar reports submarkets, not cities, so its market reports do not rank cities. Its Airport Area submarket, which includes Ontario, Rancho Cucamonga and Fontana, held about 21.3 million vacant square feet in Q3 2026, the most of any submarket and roughly 31% of the metro total (Apex’s analysis of CoStar data).

What is the Inland Empire industrial availability rate in 2026?

CoStar put it at 12.5% in Q3 2026, a 15-year high, up from 12.2% in Q1 2026. Warehouse and distribution buildings, CoStar’s logistics subtype, run higher at 13.6%.

What is the difference between vacancy and availability for warehouses?

Vacancy is space that is empty now. Availability is broader: CoStar includes all sublease space and under-construction supply. That is why the Inland Empire’s 12.5% availability rate runs above its 8.7% vacancy rate (CoStar, Q3 2026).

Are CoStar submarkets the same as city limits?

No. Submarkets are research boundaries, not city limits. CoStar’s Airport Area, for example, includes Ontario, Rancho Cucamonga and Fontana, and its Mojave River Valley includes Victorville, Apple Valley and Barstow. Read a submarket figure as a regional number, not a city’s.

How much warehouse space is under construction in the Inland Empire?

CoStar counted 14.0 million square feet under construction in Q3 2026, up from 10.3 million in Q1 2026 but far below the 45.7 million peak in 2022. About 52.4% of it is pre-leased, and the Airport Area holds the largest share, about 5.6 million square feet.