Commercial Real Estate Market in Diamond Bar, CA
Updated monthly: sale, lease, property records, location trend, and more… · Last update: September 30
61 active listings and 455 off-market properties in Diamond Bar, CA. Commercial property asks $363/SF to buy and $33.00/SF/Yr to lease.
Market Trends
Diamond Bar, CA spans 34.4 square miles in Los Angeles County, California. Figures below refresh monthly; last updated 30 September 2026.
Office
Office space in Diamond Bar, CA asks $305/SF to buy. Vacancy runs 20.8% across the West region in 2025, up from 11% in 2019.
Average Sale Price $/SF
Listings
Vacancy Rate % in West region
Retail
Retail space in Diamond Bar, CA asks $510/SF to buy. Vacancy runs 5.8% across the West region in 2025, down from 7% in 2020.
Average Sale Price $/SF
Listings
Vacancy Rate % in West region
Industrial
Industrial vacancy in Diamond Bar, CA runs 7.9% across the West region in 2025, up from 3.7% in 2019. Nearly 3.2x the 2022 low of 2.5%.
Vacancy Rate % in West region
Multifamily
Multifamily space in Diamond Bar, CA asks $330/SF to buy. Vacancy runs 8.6% across the West region in 2025, up from 7% in 2022.
Average Sale Price $/SF
Listings
Vacancy Rate % in West region
Market overview
Demographics & Economy
Diamond Bar, CA has 87,684 residents in 29,542 households. Density runs 2,546 people per square mile. Median household income here is $114,615 and median gross rent $2,617 a month.
87,684
Population
29,542
Households
3
Avg Household Size
44
Median Age
53%
College-Educated
93%
High-School Grad
34.4 sq mi
ZIP Area
2,546
Density / Sq Mi
$114,615
Median Household Income
$55,011
Median Earnings
$2,617
Median Rent
$906,129
Median Home Value
Tools
Nearby Markets
| Market | Average Sale Price, $/SF | Average Lease Price, $/SF/Yr |
|---|---|---|
| Pomona | $363 (county avg) | $22.10 |
| San Dimas | $363 (county avg) | $21.62 |
| La Verne | $363 (county avg) | $36.08 |
Commercial property in Diamond Bar, CA asks $363/SF. The 3 bordering markets run from $363/SF in Pomona to $363/SF in Pomona, and the city sits in line with their $363/SF median.
Frequently Asked Questions
What is the average price per square foot for commercial property in Diamond Bar?
Commercial property in Diamond Bar, CA asks an average of $363 per square foot. The 6 most recent recorded sales traded at a median of $598/SF. Retail carries the highest asking price at $510/SF.
How much does it cost to lease commercial space in Diamond Bar?
Asking lease rates in Diamond Bar, CA average $33.00 per square foot per year.
How does Diamond Bar compare to nearby markets on price?
Diamond Bar, CA asks $363/SF against $363/SF in Pomona, $363/SF in San Dimas and $363/SF in La Verne.
Where does Realmo's Diamond Bar market data come from?
Realmo compiles Diamond Bar, CA figures from 6 recent recorded sales, 35 active sale listings, 26 active lease listings, 455 tracked off-market properties. Sale and lease figures refresh monthly; vacancy annually. Last updated 30 September 2026.
Methodology & data sources
- Asking prices and averages
- Computed from 35 active for-sale and 26 active for-lease listings in Diamond Bar, CA. These are ASKING figures from live listings, not closed-transaction prices, and a segment carried by a handful of listings reads as indicative rather than an average.
- Price per square foot
- The county-level $/SF blends closed sales aggregated over the trailing months of available data, not a single day's snapshot — it can differ from any one month's own median.
- Vacancy rates
- Published per-sector market series, taken at the metro level where one exists and otherwise at the Census-region level — a chart reading "in <region> region" is a regional number, not this city's.
- Refresh
- The monthly aggregates close at the end of the previous month, so 30 September 2026 — not today — is the honest last update.
- Known limitations
- office vacancy is reported at West region level, retail vacancy is reported at West region level and industrial vacancy is reported at West region level.
- Coverage
- Metrics below the 10-observation threshold fall back one geographic level. The geography used is named on each figure.
Compiled by the Realmo Data team · reviewed 30 September 2026 · report a data issue
