2027 edition · Research reviewed November 7, 2026
CBRE is our #1 editorial choice for an Inland Empire office tenant seeking a named adviser with explicit Riverside and San Bernardino county experience. Shelton & Associates and WestMar Commercial Real Estate offer useful alternatives, particularly for a tenant-only relationship or a Southwest Riverside search. We applied all nine firm criteria. Office demand should be defined by the business using the space; a warehouse team or a general regional office address is not enough evidence of that service.
How we rank commercial real estate brokerage firms in Riverside–San Bernardino–Ontario, CA
Our 2027 ranking uses the same nine-part methodology as our 2026 guides. We compare local specialists with regional and national firms using current public sources, verified service geography and relevant specialization in office tenant representation. We evaluate each candidate using these nine criteria:
- Experience and reputation
- Market knowledge and specialization
- Network and connections
- Technological capabilities
- Data transparency and accuracy
- Online presence and digital marketing
- Local and global reach
- Service range
- Innovation and customer focus
Using these criteria, we identify one #1 editorial recommendation for the assignment described below and compare other qualified options. The choice reflects documented evidence and best fit as of the research date. Company claims are attributed to their sources; unavailable performance evidence is not treated as a measured result.
OUR #1 RECOMMENDATION
#1 — CBRE
For 2027, CBRE is our #1 editorial recommendation among commercial real estate brokerage firms for office tenant representation in Riverside–San Bernardino–Ontario, CA.
Best fit: An office tenant search across the two counties
Our #1 for an office tenant search across Riverside and San Bernardino counties has a named Ontario specialist whose current biography explicitly covers office occupier lease and sale decisions in both counties, giving the assignment a directly evidenced local lead.
The shortlist at a glance
Our #1 choice and other specialists| Firm or broker | Best fit | Why selected |
|---|---|---|
| #1 CBRE | An office tenant search across the two counties | Yocum explicitly documents office occupier work in Riverside and San Bernardino. |
| Shelton & Associates | Renewal and relocation under a tenant-only model | The local service page includes office requirements and occupier-only representation. |
| WestMar Commercial Real Estate | Southwest Riverside office requirements | The local brokerage describes office leasing and a relevant tenant example. |
CBRE — our #1 for a county-spanning office search
Yocum’s current Ontario biography specifically describes office tenant leasing and sale transactions, including Riverside and San Bernardino counties. CBRE: Kyle Yocum, office tenant representation We select CBRE for a business comparing locations across those county boundaries. Ask Yocum’s proposed team to relate the search to the company’s operating and staffing requirements. Decide which tasks the brokerage team will perform and which need a designer, project manager or other specialist.
Shelton & Associates — an occupier-only alternative
Shelton’s Inland Empire service page includes office and flex requirements and a comparison of renewal with relocation; its stated model represents tenants and buyers rather than landlords. Shelton & Associates: Inland Empire occupier services We recommend an interview when a business wants that model to organize the engagement. Request a transparent comparison of the existing premises and credible alternatives. The usefulness of the advice depends on the underlying building facts and the team’s ability to execute the search.
WestMar Commercial Real Estate — Southwest Riverside focus
WestMar identifies Southwest Riverside County as its brokerage territory and includes office leasing in its practice. Its site also publishes a named law-firm tenant’s account of an office search. WestMar Commercial Real Estate: Southwest Riverside brokerage That company-published testimonial supports a relevant interview question; it is not an independent satisfaction study. We include WestMar for a Temecula-area requirement where a focused local search is more useful than a broad county-wide mandate.
Specify the office before comparing buildings
Give finalists a short operating brief: who uses the premises, when they attend, the work that must happen there and the dependencies that govern the move. Identify critical access, parking, connectivity and layout requirements. Ask the adviser to show which options meet those needs without assuming that every office listing can accommodate the use. Record unresolved information before the shortlist is narrowed.
Compare the whole occupation decision
Request a consistent review of timing, improvement responsibilities, ongoing charges and the practical effects of staying or moving. Agree how proposals and landlord responses will be documented. CBRE leads here because its named specialist’s personal office scope and county coverage match the brief directly. Shelton and WestMar remain credible alternatives for different representation or geographic needs. Our editorial selection does not promise reduced occupancy costs, particular concessions or a future negotiating result.