Local Guide

San Diego County SB-684 Lot Splits: Local Requirements and Process

July 01, 2025
San Diego County
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San Diego County has implemented SB-684 with specific local requirements that property owners must understand. This guide covers the unique aspects of lot splitting in San Diego County.

San Diego County SB-684 Implementation

San Diego County has embraced SB-684 while adding local requirements to ensure development compatibility with existing neighborhoods and infrastructure.

Specific Requirements in San Diego County

*Minimum Lot Sizes

*

- Original lot

minimum 4,000 sq ft in most areas

- Each resulting lot

minimum 2,000 sq ft

- Coastal zones

higher minimums may apply

- Rural areas

different standards apply

*Setback Requirements

*

- Front setback

typically 20 feet minimum

- Side setbacks

5 feet minimum per side

- Rear setback

15 feet minimum

  • Varies by specific zoning designation

Application Process in San Diego County

*Step 1

Pre-Application Meeting*

  • Required consultation with planning staff
    • Review of property and requirements
      • Identification of potential issues
      • *Step 2

        Application Preparation*

        • Complete County application forms
          • Professional survey and site plan
            • Utility service verification letters
            • *Step 3

              Formal Submission*

              • Submit to County planning department
                • Pay required application fees
                  • Begin 60-day review period
                  • *Step 4

                    Review and Approval*

                    • Administrative staff review
                      • Possible requests for additional information
                        • Final approval and conditions
                        • Timeline and Fees

                          *Typical Timeline

                          *

                          - Pre-application

                          2-4 weeks

                          - Application preparation

                          4-8 weeks

                          - County review

                          60-90 days

                          - Final processing

                          2-4 weeks

                          - Total

                          4-6 months

                          *Fee Structure

                          *

                          - Application fee

                          $3,500-5,000

                          - Review fees

                          $1,500-2,500

                          - Recording fees

                          $500-800

                          - Total county fees

                          $5,500-8,300

                          Special Considerations

                          *Coastal Commission Areas

                          *

                          • Additional review may be required
                            • Environmental assessments possible
                              • Extended timeline in coastal zones
                              • *Fire Safety Requirements

                                *

                                • Adequate emergency access required
                                  • Fire department review and approval
                                    • Possible vegetation management requirements
                                    • *Utility Connections

                                      *

                                      • SDG&E electrical service verification
                                        • Water district capacity confirmation
                                          • Sewer connection feasibility
                                          • Common Challenges in San Diego County

                                            *Steep Terrain

                                            *

                                            • Grading limitations may apply
                                              • Geotechnical studies may be required
                                                • Access challenges on hillside properties
                                                • *Historic Areas

                                                  *

                                                  • Additional review in historic districts
                                                    • Preservation requirements may apply
                                                      • Extended review process possible
                                                      • *Infrastructure Capacity

                                                        *

                                                        • Water and sewer capacity limitations
                                                          • Traffic impact considerations
                                                            • School district capacity issues
                                                            • Success Tips for San Diego County

                                                              1. **Early Consultation**

                                                              Meet with planning staff before starting

                                                              2. **Professional Team**

                                                              Use experienced local professionals

                                                              3. **Utility Coordination**

                                                              Confirm utility capacity early

                                                              4. **Neighbor Relations**

                                                              Maintain good neighbor relationships

                                                              5. **Patience**

                                                              Allow extra time for the process

                                                              Market Conditions

                                                              San Diego County's strong real estate market makes lot splits particularly attractive

                                                              • High property values increase split benefits
                                                                • Strong demand for buildable lots
                                                                  • Good rental market for future development
                                                                  • Professional Resources

                                                                    San Diego County has many qualified professionals experienced with SB-684

                                                                    • Planning consultants familiar with county process
                                                                      • Surveyors experienced with local requirements
                                                                        • Attorneys specializing in land use law
                                                                        • San Diego County's implementation of SB-684 provides excellent opportunities for property owners while maintaining community standards through thoughtful local requirements.

Related Topics:
SB-684 San Diego County lot split local requirements California

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