San Bernardino County · Inland Empire West · Q2 2026
Flex Space in Rialto
Asking rent
$1.25–$1.55/SF/mo NNN
Sale pricing
$325–$425 per square foot
Inland Empire West vacancy
5.9%
Flex space in Rialto, California typically asks $1.25–$1.55/SF/mo NNN and sells for roughly $325–$425 per square foot as of Q2 2026. Rialto sits in Inland Empire West (San Bernardino County), where direct vacancy is about 5.9% and the sub-regional average asking rent is $1.11/SF/mo NNN. Pricing within that range is set by office-to-warehouse ratio, quality of the office build-out, ground-level versus dock loading, parking ratio, and visibility.
By Dan Scodeller, Senior Vice President | Principal, Lee & Associates Last updated Data through Q2 2026
What are current market conditions for flex space in Rialto?
City-level industrial statistics are not published with the same rigor as sub-regional figures, so the table below shows Inland Empire West conditions — the best available proxy for Rialto — alongside the Inland Empire overall. Use it to frame expectations, then get a building- or site-specific survey before making a decision.
| Metric | Inland Empire West | Inland Empire overall |
|---|---|---|
| Average asking rent (NNN) | $1.11/SF/mo | $0.98/SF/mo |
| Direct vacancy | 5.9% | 7.6% |
| Total vacancy (incl. sublease) | Tracked IE-wide | 8.6% |
| Availability rate | Tracked IE-wide | 12.9% |
| IOS cap rate (indicative) | Tracked IE-wide | ~6.5% |
| Market character | Tighter and pricier, port-proximate, premium logistics demand | |
| Measure | Rialto estimate |
|---|---|
| Typical asking rent | $1.25–$1.55/SF/mo NNN |
| Typical sale pricing | $325–$425 per square foot |
| Sub-region | Inland Empire West · $1.11/SF/mo NNN average |
| What sets pricing | office-to-warehouse ratio, quality of the office build-out, ground-level versus dock loading, parking ratio, and visibility |
Runs above the Inland Empire West warehouse average of $1.11/SF/mo NNN because of the office build-out.
Source: CBRE Q2 2026, Colliers Q1 2026, Kidder Mathews Q2 2026, Savills Q1 2026, Lee & Associates Mid-2026. Pricing estimates are derived from sub-regional averages and are directional only.
Why Rialto for flex space?
Central-IE distribution hub on the I-10/I-210; site of large institutional sales including a $270M Amazon portfolio. For flex buildings specifically, that context matters: Rialto is in San Bernardino County and prices against Inland Empire West conditions — currently 5.9% direct vacancy and $1.11/SF/mo NNN average asking rent.
Being on the west side of the Inland Empire carries a real premium. Inland Empire West runs 5.9% vacancy against 9.0% on the east side, and asking rents are about $0.17 per square foot per month higher. Tenants pay that premium for proximity to the Ports of Los Angeles and Long Beach and to Ontario International Airport — the fewer miles per truck turn, the more the premium pencils. Developable land is largely exhausted here, so new supply is limited and existing product holds value better through soft cycles.
Typical users of flex buildings in Rialto are light manufacturers, service contractors, medical and lab users, showroom operators, distributors needing meaningful office, and growing companies not yet ready for separate office and warehouse. Units generally run 2,000 to 25,000 square feet, often in multi-tenant business parks with shared circulation.
What to check before you lease or buy flex space in Rialto
The office ratio drives the rent
Flex rents at a premium to plain warehouse because part of the space is finished office. A 40% office building commands materially more per square foot than a 10% office building — but you pay for that finish whether your operation needs it or not.
Parking is the constraint people miss
Office-heavy operations need parking ratios that industrial parks were never designed for. Count stalls against headcount before signing; a shortfall is not fixable after the fact.
Ground-level loading limits distribution use
Most flex product loads at grade rather than dock-high. That is fine for service and light manufacturing tenants and disqualifying for anyone running full trailers.
Flex Space in Rialto — frequently asked questions
How much does flex space cost in Rialto, CA?
Flex space in Rialto generally asks $1.25–$1.55/SF/mo NNN and sells for roughly $325–$425 per square foot as of Q2 2026. Runs above the Inland Empire West warehouse average of $1.11/SF/mo NNN because of the office build-out. NNN means the tenant additionally pays taxes, insurance, and maintenance — typically $0.12 to $0.20 per square foot per month in the Inland Empire. Where a specific building falls in that range comes down to office-to-warehouse ratio, quality of the office build-out, ground-level versus dock loading, parking ratio, and visibility.
Is there flex space available in Rialto right now?
Yes. Inland Empire West, which includes Rialto, is running about 5.9% direct vacancy as of Q2 2026, against 7.6% for the Inland Empire overall and 12.9% availability including space marketed but still occupied. That is meaningfully more choice than tenants had between 2021 and 2023, and landlords are offering real concessions — free rent, improvement allowances, and flexible terms. Availability in Rialto specifically changes week to week, so a current survey beats any published figure.
Is Rialto a good location for flex space?
Central-IE distribution hub on the I-10/I-210; site of large institutional sales including a $270M Amazon portfolio. As part of Inland Empire West, Rialto costs more — about $1.11/SF/mo NNN against $0.94/SF/mo NNN on the east side — and delivers shorter drayage runs to the ports and Ontario International Airport. It fits operations where truck turns per day drive the economics. The honest answer for any specific requirement depends on your truck counts, headcount, power needs, and timing — which is exactly the conversation worth having before you tour anything.