Cantobrio III

Cantobrio III covers 23.5 acres on the city's own HOA Local register, and the city address layer records 119 addresses inside that line. They sit on seven streets, Santa Catrina, Santa Isabel, San Carlos and Via Honesto among them. The published boundary follows lot lines and leaves the street rights of way outside it, so no centerline falls inside. The county parcel record inside the boundary is 129 parcels, predominantly detached single family houses. The median lot the county records here is 0.14 acres and 53 feet wide. The city general plan gives 18.5 of those acres a low density residential designation. The zoning layer puts 18.4 acres in the RL-6000 zone and 4.9 in OS. Mail here carries the 92688 zip code and a Rancho Santa Margarita postal city.

0.4 acres of O'Neill Regional Park fall inside the boundary on the county park layer. 23.5 acres are rated Very High on the 2025 state fire hazard severity map the city publishes. The city assigns the ground to evacuation zone RSM05, which it describes as City Center, City Hall, Retail, High Density Apt. Complexes, Elderly Care Facilities, High School, Middle School. Water comes from the Santa Margarita Water District and trash is collected Monday by CR&R. All of it lies in Saddleback Valley Unified, which feeds Cielo Vista Elementary, Rancho Santa Margarita Intermediate and Trabuco Hills High.

Cantobrio III is the later and larger part of the Cantobrio idea, built at the end of the 1980s while the plain around it was filling in fast. The land had been cattle range under the O'Neill family since 1882, and before the ranch it was Acjachemen country, with the village of Alume standing between Trabuco Creek and Tijeras Creek inside what is now the city. The Trabuco Adobe was built near that village in 1810 as an outpost of Mission San Juan Capistrano.

That mission history is written into the street signs here. Santa Catrina, Santa Isabel, San Carlos, San Vincente, San Andres and Santa Elena run through the neighborhood, with Via Honesto among them, and the same saint naming carries across into the Arroyo Vista and Arroyo Oaks streets next door. These are single family homes on a little over twenty three acres, and the setting is the same one the mission fathers were looking at: an open plain under the Santa Ana Mountains.