Apartments Near California State Polytechnic University-Pomona

Diamond Bar:
September Rent Report

Welcome to the September 2026 Diamond Bar Apartment Report. In this assessment of the local rental market, Rentable data scientists and rental experts break down the September 2026 key findings and figures for the Diamond Bar rental landscape.

Our experts analyze the pricing trends — one-bedroom, two-bedroom, year-over-year and month-over-month — in Diamond Bar and surrounding areas and provide comparisons to the entire metro area, nearby cities and some of the most desirable and expensive cities in the United States. Take a look at the last 12 months of Diamond Bar average rent prices in the chart below.

September Prices: Diamond Bar vs. Surrounding Areas

Rent Prices in Diamond Bar and Surrounding Areas

Rent prices have decreased in Diamond Bar over the last month. But how have the surrounding areas fared when it comes to the recent volatility in apartment prices? Rent prices in 0 of the Diamond Bar suburbs increased last month. On the other hand, 0 local areas experienced a decrease in the price of a one-bedroom apartment.

More key findings include:

• Rents did not increase in any of the Diamond Bar suburbs

• Rents did not decrease in any of the Diamond Bar suburbs.

Data set for Diamond Bar and suburbs

Methodology

Each month, using over 1 million Rentable listings across the United States, we calculate the median 1-bedroom and 2-bedroom rent prices by city, state, and nation, and track the month-over-month percent change. To avoid small sample sizes, we restrict the analysis for our reports to cities meeting minimum population and property count thresholds.