ADU Surveys in Concord, CA
We provide ADU surveys in Concord, Contra Costa County, where the city's own plan-review checklist says residential site plans should be based on a survey prepared by a licensed surveyor.
ADU Surveys in Concord: Local Conditions
Concord answers the "do I really need a surveyor" question in its own paperwork: the city's plan-review checklist for residential building permits states that site plan information should be based on a survey prepared by a licensed surveyor — dimensioned property lines with lengths, setback dimensions, every structure, and a lot-coverage table, plus easements with their location, dimension, and purpose, and natural features like creeks and drainage swales where they exist. The Engineering Division's site-plan guideline layers on the elevation content: pad elevation, finish grade elevations at building corners, lot corner elevations and the lot's high point, surface drainage arrows showing that runoff won't concentrate onto neighbors, and yard profiles extending 20 feet into the adjacent lots. For hill-site lots, the guideline escalates to 2-foot contour lines with driveway and building-elevation profiles.
That elevation emphasis fits Concord's geography. Most of the city's ADU stock goes behind flat-lot ranch homes — the Monument corridor, Holbrook, Sun Terrace — where the drainage-arrow requirement is really a question of inches and the survey's dense spot elevations decide whether the grading plan works. But the neighborhoods climbing toward Lime Ridge and the Pine Hollow edges of Clayton Valley are genuine hill-site lots where the 2-foot-contour requirement applies as written. Our laser-scanned site survey covers both ends in one visit: boundary from record research and monument recovery, corner and high-point elevations, drainage-relevant grades across the lot, and the structures, easements, and creek features the planning checklist lists.
Concord offers pre-approved ADU plans, which still require a basic site plan — and "basic" still means accurate lines and elevations. Deliverables are a stamped base map, layered DWG, and staked corners, with records through the Contra Costa County Recorder in Martinez. For steeper parcels, our Concord topographic surveys extend the same fieldwork to full contour mapping.
Full service details, process, and deliverables: ADU Surveys & Site Plans for Permit Applications · All surveying in Concord: Concord land surveying
What's Included
- Scaled site plan base map matching city ADU checklists
- Boundary verification — 4-ft setbacks measured from the true line, not the fence
- Property corners staked for design and construction
- 1-foot contours and drainage data for sloped lots
- Easement and utility locations from record research
- CAD-ready DWG base file your designer builds on directly
- Foundation form verification when the inspector requires it
Our Process
Checklist Review
We confirm your city's ADU submittal requirements — site plan content, survey triggers, slope and drainage items — so the survey is scoped to what plan check will actually ask for.
Boundary & Records Research
We research your deed, recorded maps, and easements, then locate existing monuments to establish where your property lines actually are.
Site Survey
One laser-scanned site visit captures structures, hardscape, trees, utilities, and terrain — spot elevations and contours included where the lot slopes or the city requires them.
Deliverables
You receive a stamped site plan base map and layered DWG file sized to your city's checklist, with property corners staked on the ground for your designer and builder.
ADU Surveys in Concord: FAQ
Need ADU Surveys in Concord?
Call (510) 543-2220 or request a quote — we'll scope your Concord project and give you a fixed price.
Meeting-first estimates • Response within 24 hours • Serious projects only