California Coverage · Sonoma County
Sonoma County base maps & site data for designers
The existing-conditions base map and pre-design site analysis that normally takes a half-day of GIS hunting and a site visit — for any Sonoma address, from Healdsburg estates to coastal parcels, in about a minute.
What Lekua resolves in Sonoma County
Every layer below is pulled live from Sonoma’s own GIS and authoritative state sources the moment you enter an address — no manual tracing, no generic insets, every source cited.
Assessor parcel boundary with APN, address, and lot area from Permit Sonoma’s own GIS.
Fine 1–2 ft contours generated on-demand from the 1-meter USGS 3DEP elevation model — vineyard- and hillside-grade relief the county’s 40-ft published contours can’t provide.
County-hosted building footprints, gap-filled with FEMA national structures — the fallback matters here, where post-wildfire rebuilding outpaces any single layer.
CAL FIRE FHSZ severity (2024–25 remap) with Zone 0 / 1 / 2 defensible-space perimeters — in the county reshaped by Tubbs, Kincade, and Glass, fire-wise planting is the starting point, not an afterthought.
USDA SSURGO soil profile, historical rainfall, and modeled seasonal sun-hour heat maps for the parcel.
California natives matched to the site’s soil and microclimate, plus lawn-replacement rebate estimates from Sonoma Water and the city programs (Santa Rosa, Petaluma, Sonoma).
Built for the county that rewrote its fire rules
Tubbs, Kincade, and Glass reshaped how Sonoma builds and plants. Much of the county sits in mapped fire-hazard severity zones, and defensible-space rules now shape nearly every rural and hillside project. Lekua draws the CAL FIRE Zone 0 / 1 / 2 perimeters on the plan and filters the plant palette to what each zone allows — fire-wise from the first pass.
- Zone 0 (0–5 ft ember-resistant), Zone 1 (5–30 ft), and Zone 2 (30–100 ft) perimeters drawn around the structures.
- Every recommended plant carries a defensible-space zone rating, so you place the right species in the right zone.
- Flammability ratings draw on Las Pilitas burn-time research and UCANR / CAL FIRE-aligned fire-safe lists.
A native palette, enriched beyond the plant list
Start from the Calscape native plant database — then get the research-backed traits Calscape alone doesn’t put at your fingertips, matched to the parcel’s exact soil, sun, rainfall, and microclimate. Hand a client a list that’s code-compliant, climate-appropriate, and built to perform.
Flammability and defensible-space zone suitability from Las Pilitas burn-time research and UCANR / CAL FIRE-aligned fire-safe lists — not just a name on a list.
Slow / moderate / fast growth plus mature height and spread, so spacing and time-to-fill are realistic from day one.
Calscape cultivation and longevity guidance, so the palette reads for how it performs over 10–20 years, not just at install.
WUCOLS-aligned water-use ratings (for the MWELO budget) and pollinator / bird support scores on every species.
Plant data: Calscape / CNPS, enriched with Las Pilitas burn-time research, UCANR & CAL FIRE-aligned fire-safe lists, and WUCOLS water-use ratings.
Water districts & rebates
Lawn-replacement rebate estimates are matched to the serving district: Sonoma Water · City of Santa Rosa Water · City of Petaluma · City of Sonoma.
Sonoma County base map FAQ
Can I get a CAD base map for a Sonoma County parcel?
Yes. Enter any Sonoma address and export a layered DXF (AutoCAD-compatible) with assessor parcel lines, building footprints, on-demand 1–2 ft contours, and spot elevations — plus a designed PDF site report for the client.
What contour interval is available in Sonoma County?
Sonoma’s published vector contours are 40-ft, so Lekua generates fine 1–2 ft contours on-demand from the 1-meter USGS 3DEP elevation model instead — the difference between usable grading information and decoration on hillside and vineyard-adjacent lots.
Does it include zoning setbacks for Sonoma towns?
Not yet — setback tables for Santa Rosa, Petaluma, and the county are not yet encoded, and the export never guesses: where a setback isn’t verified it says so plainly instead of drawing lines. Encoded tables follow the same review-gated process as other counties.
How does it handle defensible space and fire-safe planting?
Lekua draws CAL FIRE Zone 0 / 1 / 2 defensible-space perimeters around the structures and tags every recommended native with the zones it’s suited to — using flammability data from Las Pilitas burn-time research and UCANR / CAL FIRE-aligned fire-safe lists.
Is the data current and reliable enough for submittals?
Layers are pulled live from county GIS, USGS, and CAL FIRE at export time, and any encoded setback table cites its source with a date. Everything is labeled “for planning reference — not for construction.” Verify against the current code and a stamped survey before submittal.
Start with a Sonoma address
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