Snapshot
Population
53,355
US Census ACS, 2024 / FBI UCR Table 8, 2024
Median home price
$1,089,279
Redfin, 2026-08
Median rent
$2,521/mo
US Census ACS, 2024
Crime / 1k
19.4
FBI UCR Table 8, 2024
Market
Price / sq ft
$559
Redfin, 2026-08
Months of supply
4.6
Redfin, 2026-08
Median days on market
44
Redfin, 2026-08
Renter-occupied
22.7%
US Census ACS, 2024
Median household income
$108,281
US Census ACS, 2024
Housing units
18,969
US Census ACS, 2024
Developments
What you can build here — ADU
Typical SFR: 1 ADU + 1 JADU. Size 850-1,000 SQFT. State fee exemptions apply. 60-day ministerial clock.
§22.42.120. Last verified 2026-08-18. Not legal advice — confirm current requirements with Diamond Bar's planning department. See the statewide ADU floor every city sits on top of.
What you can build here — zoning standards
| Zone(s) | Density | Height | Setbacks F / S / R | Lot coverage | |
|---|---|---|---|---|---|
| Single-family | RR (1 du/ac) | 1 du/ac | 35 ft | 30' / 15' / 25' | 30% |
| RL (3 du/ac) | 3 du/ac | — | 20' / 10' / 20' | 40% | |
| RLM (5 du/ac) | 5 du/ac | — | — | — | |
| Duplex | — | — | — | — | |
| Townhome | RM / RMH multi-family | 12–16 du/ac | — | 20' / 5' / 25' | 30% |
| Multifamily | RM / RMH / RH / RH-30 | 12–30 du/ac | 35 ft | — | — |
Parking · Per code tables.
Overlays to check · SB 9 lot-split eligible · Density Bonus Law applicable
Base zoning — always check for a project-specific overlay or density-bonus increase. Not legal advice. Diamond Bar Development Code Ch 22.08; Housing Element Table 4-2. Last verified 2026-08-23. Full zoning code
Advisory Desk
Own property in Diamond Bar?
Get a preliminary read on what your parcel can support — zoning, density, and feasibility, grounded in local land-use data. No obligation, no sales pitch.