San Diego County ADU Guide

Escondido

The Pre-Approved ADU program includes several detached plan sizes. Eligible plans can support Express production; modified or larger projects may require a Custom Plan.

Reviewed August 2026Official jurisdiction resource ↗
01 / Plan path

Choose the right production starting point.

The Pre-Approved ADU program includes several detached plan sizes. Eligible plans can support Express production; modified or larger projects may require a Custom Plan.

Express PlanStarting at $4,500

For a qualifying jurisdiction preapproved plan adapted into the property-specific architectural production set.

Custom PlanStarting at $6,500

For an original floor plan and architectural production set developed around the property and homeowner.

02 / Size + fee checkpoints

Size affects more than floor area.

Pre-approved program options have included plans from approximately 484 to 1,000 square feet. Verify current availability and property eligibility.

Crossing 500, 750, or 1,000 square feet may affect school assessment, impact-fee treatment, or design review considerations.
500 SFConfirm school-fee assessment rules750 SFState impact-fee protection checkpoint1,000 SFTwo-bedroom state minimum allowance1,200 SFCommon local upper-range checkpoint
03 / Site conditions

Property conditions can change the path.

  • Fire access and water supply
  • Slope and retaining conditions
  • Utilities
  • Flood and drainage
  • Existing property records
04 / Consultant screen

Likely disciplines to evaluate.

  • Structural engineering or adaptation
  • Title 24 energy documentation
  • Survey as required
  • Civil or geotechnical engineering when triggered

Consultants are retained only when required by the property, design, or reviewing agency. Their proposals and coordination are separate from the architectural production fee unless stated otherwise in the agreement.

05 / Property-specific next step

Turn the guide into a preliminary project report.

Enter the address to screen jurisdiction, mapped constraints, likely agencies, drawing requirements, consultants, and the preliminary fee path.

Check the property →Email Bennett Design Studio →
Important: This guide is general planning information, not a zoning determination, permit approval, fee quote, or guarantee of feasibility. Current parcel records, adopted codes, agency interpretations, utility requirements, site investigation, and written agency confirmation control.