# San Diego County, CA Site Plans — PDS Plot Plan Requirements and Accela Submittal
Unincorporated San Diego County spans millions of acres of residential, agricultural, and foothill land. If you are building or remodeling in communities such as Ramona, Valley Center, Fallbrook, or Alpine, your submittal goes directly to County Planning & Development Services (PDS).
Because San Diego County faces intense fire hazard zones and sensitive watershed environments, its plan review process is thorough. Submitting a clear plot plan that adheres to County Form PDS #090 is the critical first hurdle to getting through plan check without delays.
Do You Need a Site Plan for a Small Permit in San Diego County?
Yes. PDS requires a fully dimensioned plot plan drawn to scale for virtually every building permit application involving exterior construction or footprint changes.
Under County Form PDS #090 (Minimum Plot Plan Information), your plan must include:
- Lot dimensions and property lines clearly identified with precise boundary measurements.
- Assessor's Parcel Number (APN) displaying Book, Page, and Parcel.
- Size, dimensions, and use of every structure on the property (both existing and proposed).
- Setbacks measured at right angles from structures to each property line.
- Distances between separate structures, also dimensioned at right angles.
- All recorded easements (utility, drainage, ingress/egress, open space).
- Vehicular access and circulation (driveways, turnarounds, street curb cuts, off-street parking).
- Topography and drainage showing direction of surface flow and any watercourses.
- Significant natural features, specifically including mature trees with trunk diameters of 6 inches or greater.
- Fences, retaining walls, and trash enclosures with heights labeled.
- North arrow and standard engineer's scale (such as 1" = 20').
Submittal formatting: Two complete sets of building plans are required for counter submissions. All plot plan sheets must be neatly folded to 8.5" × 11" with the title block in the lower right-hand corner clearly visible. Plans containing pencil, manual pen revisions, taped overlays, or correction fluid are rejected.
Who Runs Into This in San Diego County
- homeownersin city spheres of influence (e.g., adjacent to Escondido or El Cajon) who submit to the city building counter, only to discover their parcel is actually unincorporated county land governed by PDS.
- ADU builders who fail to account for the mandatory 4-foot side and rear setback minimums or clear fire separation requirements.
- Rural parcel owners who overlook the requirement to map mature oak and eucalyptus trees over 6 inches DBH located near proposed construction footprints.
- DIY applicants whose submittals are turned away due to hand-drawn pencil sketches or folded plan errors.
What Needs a Site Plan in San Diego County
- Fence permit site plan — Required for walls or fencing exceeding building code exemption heights.
- Shed permit site plan — Required for accessory storage buildings exceeding 120 square feet or containing electrical/plumbing utilities.
- Deck permit site plan — Required for decks elevated more than 30 inches above surrounding grade or attached to dwellings.
- Pool permit site plan — Required for all swimming pools and spas; must show safety barriers, equipment pads, and setback distances.
- Garage permit site plan — Required for attached or detached residential garages and carports.
- Addition permit site plan — Required for all home expansions, second-story additions, or enclosed patio rooms.
- Accessory Dwelling Units (ADUs) — Required. San Diego County offers standard pre-approved plans that are roughly 85% complete, requiring a site-specific plot plan to complete the filing.
Why This Trips People Up in San Diego County
The 18 Municipalities Split. With 18 incorporated cities within county boundaries, misfiling is common. An address containing "San Diego, CA" might be inside the City of San Diego or located in unincorporated county territory like 4S Ranch. Checking the Assessor's property report or zoning portal prevents submitting to the wrong authority.
Letter Designator Zoning System. San Diego County's zoning ordinance does not use a single numeric setback table. Setbacks are determined by a zoning "letter designator" specified on your property's zoning classification sheet. This letter establishes variable setbacks based on street width, yard category, and building height.
Tree Canopy Protection. Unlike many urban jurisdictions, PDS explicitly asks for existing natural features on plot plans, notably any trees with trunks measuring 6 inches or more in diameter. Omitting trees near proposed grading or building pads will prompt a plan correction.
Wildland-Urban Interface (WUI) Regulations. Much of unincorporated San Diego County falls inside High or Very High Fire Hazard Severity Zones (VHFHSZ). Site plans often require fire clearing defensible space zones (typically 100 feet) and approved fire apparatus turnaround areas.
Zoning and Setbacks in San Diego County
Setbacks vary based on your property's specific zoning designator box in the County Zoning Ordinance.
Typical Residential Standards:
- Front yard: 30 to 100 feet depending on street classification and frontage conditions.
- Interior side yard: 0 to 25 feet depending on zone designator letter.
- Rear yard: 0 to 50 feet based on designator.
- Maximum height: Generally 35 feet and 2 stories in standard residential classifications.
ADU Specifics:
- Detached ADUs: Maximum 1,200 sq ft; minimum 4-foot interior side and rear setbacks.
- Attached ADUs: Up to 50% of the main residence floor area (capped at 1,200 sq ft).
How the Tool Handles This — 5 Steps
SitePlans.AI incorporates San Diego County GIS parcel data to assemble a code-compliant plot plan:
- Enter your address — Parcel boundaries load from San Diego County Assessor GIS data.
- Layout existing and proposed structures — Position your home, detached garage, pool, or ADU.
- Establish right-angle setbacks — Drop dimension lines measured perpendicularly from all structures to lot lines.
- Identify site constraints — Mark mature trees, access driveways, easements, and fire access routes.
- Generate a PDF plan set — Export a clean, scalable PDF formatted to standard plotting dimensions ready for upload to Accela Citizen Access.
Where This Tool Fits — and Where It Doesn't
| Situation | Best path |
|---|---|
| Residential shed, deck, pool, garage, or ADU in unincorporated SD County | SitePlans.ai for the required PDS #090 plot plan |
| Verifying setback compliance before purchasing building materials | SitePlans.ai for quick visual dimension verification |
| Major grading exceeding county thresholds | Licensed Civil Engineer required for formal grading plans |
| Commercial developments or multi-family complexes | Registered CA Architect or Civil Engineer required |
| Disputed boundary lines or unrecorded monuments | Licensed CA Land Surveyor required |
What This Doesn't Replace
our site plan creator webtool generates preliminary, conceptual plot plans for typical residential permitting scenarios in unincorporated San Diego County. It is not a boundary survey performed by a licensed surveyor, nor does it replace engineered grading plans or stamped structural calculations required for complex architectural projects.
Comparison: Your Options for a San Diego County Site Plan
| Method | Cost | Time | Stamp | Notes |
|---|---|---|---|---|
| Hand drawing | Free | 2–4 hrs | ✗ | High risk of rejection; no pencil or white-out permitted |
| SitePlans.ai | Free first plan | Minutes | ✗ | Digital, scalable, and tailored to PDS #090 criteria |
| Professional Drafter | $350–$900 | 1–2 weeks | Sometimes | Suitable for multi-phase additions or complex remodels |
| Licensed CA Surveyor | $1,200–$3,500+ | 3–6 weeks | ✅ | Mandatory when boundary monuments are unknown or disputed |
| SitePlans.us (done-for-you) | Custom | 1–3 days | ✗ | Turnkey drafting service for complex or rejected submittals |
Common Mistakes That Delay San Diego County Permits
- Submitting to the incorrect jurisdiction — Confusing municipal boundaries with unincorporated county land.
- Pencil or correction tape on documents — PDS immediately rejects physical sheets bearing manual edits or white-out.
- Missing mature trees — Omitting trees with trunks exceeding 6 inches diameter on the plot plan.
- Failing to dimension at right angles — Angles must be measured perpendicularly from building corners to property lines.
- Ignoring defensible space buffers — Overlooking required 100-foot fire protection clearance zones in VHFHSZ areas.
Support and Local Resources
- San Diego County PDS Building Division — 5510 Overland Ave, Suite 110, San Diego, CA 92123 | (858) 565-5981
- Accela Citizen Access — citizenaccess.sdcounty.ca.gov
- Assessor Parcel Search — arcc.sdcounty.ca.gov
- County Zoning Ordinance — sandiegocounty.gov/pds/zoning
- FEMA Flood Map Service Center — msc.fema.gov
Nearby Counties
- Orange County site plan guide — Northwest
- Riverside County site plan guide — North
- Imperial County site plan guide — East
- California permit site plan requirements
Frequently Asked Questions
1. Does San Diego County PDS issue permits for properties in the City of San Diego?
No. The City of San Diego has its own Development Services Department. County PDS only oversees permits for unincorporated county areas like Fallbrook, Ramona, Alpine, and Lakeside.
2. Can I draw my own plot plan for a residential permit?
Yes. Under California Business and Professions Code exemptions, property owners may prepare plot plans for single-family residential projects on their own property, provided they meet all PDS #090 drafting standards.
3. What is Form PDS #090?
PDS #090 is San Diego County's official checklist defining the minimum required information for all residential building plot plans.
4. How must hard-copy plan sheets be submitted?
Hard-copy plan sets must consist of two complete sets folded to 8.5" × 11" format with the lower-right title block facing outward.
5. What are the standard setback rules for ADUs in unincorporated San Diego County?
Detached ADUs require a minimum 4-foot setback from both side and rear property lines, in addition to complying with base zone height restrictions and fire separation codes.
6. Can I use SitePlans.ai for my San Diego County permit application?
Yes. SitePlans.ai creates clean, scaled, fully dimensioned digital PDFs that incorporate required PDS #090 elements for upload to Accela Citizen Access or printing.
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Confirm your property falls in unincorporated San Diego County, enter your address or APN below, layout your project with precise right-angle setbacks, and download a code-compliant plot plan ready for PDS review.
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Have you received corrections from County PDS plan check? Forward your plan check comments to SitePlans.us for expedited plan adjustments.
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