Diamond Bar, California Housing Market

What stands out in Diamond Bar?

• Population is down 4.5% over five years: among the steepest population decline of 765 tracked cities. A shrinking population thins demand over time.
• The median asking price is $1,084,000: one of the priciest of 765 tracked cities. Entry costs are high, so cash flow is harder. Price growth has to do more of the work.
• 22% of occupied homes are rented: among the lowest renter shares of 765 tracked cities. Most residents own, so the tenant pool is thin. Your exit buyer may be an owner-occupant.

What does a shrinking population mean for Diamond Bar landlords?

The population in Diamond Bar's ZIP codes fell 4.5% over five years. 5.3% of homes are vacant, lower than most tracked cities. Households still grew 0.8% while the housing stock grew 2.5%. Fewer people living in more households means rental demand has held up better than the population suggests. Check vacancy by ZIP before you buy.

Who will rent from you in Diamond Bar?

Only 22 out of every 100 Diamond Bar households rent. This is an owners' town. The renter share is shrinking. Five years ago it was 24 in 100. Renter households here average 2.8 people. Families rent here. Buy bedrooms. Studios will sit.

The median Diamond Bar household earns $105,565 a year. Incomes here have grown 1.0% a year since 2019. Home prices have outrun incomes. Locals are being priced out. A typical home costs 10.3 times the median income. Most locals cannot buy. That keeps rental demand deep. It also caps the rent they can pay. At 30% of income, a tenant on the median income can pay about $2,639 a month.

To see what one Diamond Bar address would rent for and cash flow, run it through the app.

What is the fair market rent in Diamond Bar?

HUD sets one fair market rent for Los Angeles County. For fiscal year 2026:

• 1 bedroom: $2,085 a month. Up 0% on last year, up 81% since FY2016.
• 2 bedrooms: $2,601 a month. Down 1% on last year, up 75% since FY2016.
• 3 bedrooms: $3,298 a month. Down 1% on last year, up 64% since FY2016.
• 4 bedrooms: $3,672 a month. Down 1% on last year, up 65% since FY2016.

The figures include tenant-paid utilities and apply to all of Los Angeles County, so one home's rent can sit well above or below them. See fair market rent by city.

How does Diamond Bar compare with other California markets?

Ranked among the 141 California markets we track:

• Asking price: 38th priciest of 141. Diamond Bar is at $1,084,000. Closest: Tustin and Thousand Oaks.
• Buyer competition: 19th least competitive of 138. Diamond Bar is at 0.28 buyers per home. Closest: Cathedral City and Los Gatos.
• Time on market: 16th longest time on market of 141. Diamond Bar is at a median of 66 days on market. Closest: Apple Valley and Temecula.
• Price cuts: 38th most price cuts of 141. Diamond Bar is at 22% of sellers cutting. Closest: Stockton and Santa Rosa.

Is now a good time to buy in Diamond Bar?

The median asking price is 26.5% below its May 2023 peak. Per square foot the gap is smaller: 5.1% below the Jan 2025 high. Part of the drop is smaller homes coming to market. Prices are still falling. Waiting has paid off so far. Let listings age, then come back lower. Diamond Bar prices have risen in 87 of the last 111 months. Drops here have been short and shallow. Buying in a slow month has rarely hurt a long hold.

This market is turning. Which way is not settled yet. Check the monthly numbers above before you commit.

What numbers should you underwrite a Diamond Bar deal with?

• Price growth to assume — +3.7%/yr. Diamond Bar has grown about 3.7% a year for five years and for ten. That pace held before and after the 2020–2021 boom, so it is a fair long-run input. Prices fell 2.3% over the last year. Use it for timing. The five-year rate is the better guide.
• Months of carrying cost — 3. Budget at least 66 days of holding costs, the current median time on market, when you exit or refinance. That is 6% longer than a year ago.
• Comp on price per square foot — $559/sqft. The typical Diamond Bar listing shrank from 2,264 to 1,772 sqft since Jul 2016. So median price hides real growth: 51% per sqft versus 33% on the median. Comp on median price and you will overpay for small homes.
• Competition when you exit — +30%. Homes for sale in Diamond Bar are up 30% on last year, so your resale faces more competition than today's comps did.

Read how population change affects rentals and how we read these numbers, then run the numbers on a deal.

What is the median home price in Diamond Bar?

The median asking price in Diamond Bar is about $1,084,000 as of Sep 2026, down 6.1% from a year ago. This is the asking price on homes listed for sale. Sites that report sold prices or estimated home values will show a different number. Our Diamond Bar figures cover the 1 ZIP code with a Diamond Bar mailing address, which can reach past city limits.

Is Diamond Bar a buyer's or seller's market in 2026?

Neither side has the upper hand in Diamond Bar right now. We compare Diamond Bar with 2017–2019 at this time of year: there are 34% fewer homes for sale; listings spend 31% more days on the market; 22% of sellers have cut their price, against 21% then.

Are Diamond Bar home prices going up or down?

The median asking price is 26.5% below its May 2023 peak. Per square foot the gap is smaller: 5.1% below the Jan 2025 high. Part of the drop is smaller homes coming to market. Prices are still falling. Waiting has paid off so far. Let listings age, then come back lower.

What is the best month to buy a house in Diamond Bar?

Across 9 full years, Diamond Bar asking prices ran lowest in January, about 4.6% below the year's average. They peaked in May. The most homes for sale show up in August, about 15% above the yearly average.

What is the fair market rent in Diamond Bar?

HUD's fiscal year 2026 fair market rent for Los Angeles County is $2,601 a month for 2 bedrooms and $3,298 for 3 bedrooms. The figures include tenant-paid utilities and cover the whole county.