Diamond Bar home and condo appraisals for estates, trusts, and taxes
Master-planned hills with guard-gated estates and freeway-connected ranch tracts
The diamond-over-a-bar cattle brand of the ranch Transamerica bought in 1956 gave this master-planned city its name; the first homes went up at the north end around 1960, and cityhood followed in 1989. Our work here centers on hillside view homes, properties in The Country Estates and condominiums near the SR-57 and SR-60 junction.
- Location
- Diamond Bar is an incorporated city in the East San Gabriel & Pomona Valleys region of Los Angeles County
- ZIP codes
- 91765, 91789
- Properties
- Single-family homes and condominiums
- Fees
- $449 Standard Desktop, $299 Basic Desktop
- Delivery
- 3+ business days
Homes in Diamond Bar
The north end's early tracts are 1960s ranch houses, and development moved south and up the slopes in later decades as Transamerica and, after it, other developers built curving hillside tracts. The Country Estates is a gated enclave with a staffed entry around the clock, large custom homes on big lots, and a clubhouse, pool and tennis courts. Condominium and townhome complexes, including those around the Diamond Bar Tennis Club area near Golden Springs Drive, supply most attached housing.
What moves value in Diamond Bar
Views, elevation and usable pad area weigh heavily on graded hillside lots. The freeway junction reaches Los Angeles, Orange County and the Inland Empire, though homes closest to it contend with noise, and The Country Estates operates as a separate market with few substitutes nearby.
Neighborhoods and tracts
- The Country Estates
- Diamond Point
- South Pointe
- Pantera Park
- Diamond Ridge
- Montefino
- Cimarron Oaks
Local reference points: Residents know the city by the Diamond Bar Center, Sycamore Canyon Park, Pantera Park, the Summitridge trails, the public Diamond Bar Golf Course and the South Coast Air Quality Management District headquarters.
Appraisal considerations in Diamond Bar
Inside The Country Estates, the analysis starts with sales behind the same gates, documenting dues, architectural controls, acreage, view corridors and usable flat area. Wildfire hazard designations should be confirmed for hillside parcels across the city, and any recorded slope or drainage history weighed where it affects marketability. Homes nearest the SR-57 and SR-60 interchange need similarly exposed comparables.
With few Country Estates sales near the date of death, how do you support the value?
We first widen the time window inside The Country Estates, adjusting earlier or later sales for market change, because the gated setting is hard to replicate. If more support is needed, large custom-home sales in comparable hillside areas nearby are added and reconciled with the in-community evidence.
Reports we prepare for Diamond Bar properties
Each is a certified desktop appraisal of a single-family home or condominium, as of a current or past date.
- Date-of-Death Appraisals
- Step-Up in Basis Appraisals
- Trust Administration Appraisals
- Estate Settlement & Estate Tax Appraisals
- Gift Tax Appraisals
- Prop 19 Parent-Child Transfer Appraisals
- Divorce & Date-of-Separation Appraisals
- Family Sale & Co-Owner Buyout Appraisals
- Retrospective Appraisals
Reviewed November 2026.
Need a value for a Diamond Bar property?
Send the address and the date the value is needed for. We confirm the property and the fee within one business day; the report is delivered in 3+ business days.