From the dense, established neighborhoods of Alhambra and Arcadia to the foothill edges near the San Gabriel Mountains, we provide accurate boundary, topographic, ADU, and ALTA surveys across the San Gabriel Valley — delivered fast, with clear results you can build on.
Tell us what the city, county, architect, or engineer requested — we’ll help determine whether you need boundary, topo, setback, hillside, or permit survey support. Call now to discuss your project.
The San Gabriel Valley is a cluster of dense, long-established communities east of downtown Los Angeles, where older parcels and decades of mature development meet steady infill activity. Built-out lots and tight property lines drive heavy demand for ADUs and additions, while the foothill edges near the San Gabriel Mountains bring slope and grading into the picture. Whether you're confirming a setback for a new ADU in Temple City, reconciling an older boundary in Alhambra, or mapping a hillside lot in Glendora, our team brings the right approach to your property. The San Gabriel Valley sits within Los Angeles County, and we work throughout the region.
The San Gabriel Valley is made up of many separate cities, and each runs its own building and planning department in the city where the property sits. Recorded maps and legal descriptions are handled through the Los Angeles County Recorder, and unincorporated pockets such as Altadena fall under Los Angeles County agencies. Foothill properties near the San Gabriel Mountains can add grading and slope considerations to a project. We prepare deliverables suited to local permit and recording requirements.
We work throughout the region, including:
We don't keep an office in every city, and dedicated city guides are being added over time. Don't see your community? We serve neighborhoods throughout the San Gabriel Valley — just ask.
Yes. The San Gabriel Valley sees heavy ADU and addition demand on built-out lots, so a setback survey to confirm where a new structure can sit, often paired with a topographic survey for design, is among the most common requests.
Yes. Lots along the foothill edges in communities like Monrovia, Glendora, and Altadena often involve slope and grading considerations, where a topographic survey helps support design and permitting.
Many San Gabriel Valley parcels are decades old with dense, mature development. A boundary survey reconciles older recorded descriptions and maps with conditions on the ground, which matters for fences, additions, and disputes between neighbors.
Each San Gabriel Valley city runs its own building and planning department, and recorded maps and legal descriptions go through the Los Angeles County Recorder. We prepare deliverables suited to the relevant local requirements.
Survey work is completed by, or under the responsible charge of, California-licensed Professional Land Surveyors. When a stamped survey is required, the final deliverable will identify the responsible licensee for that project.
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