ARKITDESIGNS journal

ADU planning guide

San Diego ADU Feasibility: Questions to Ask Before Design Starts

A practical starting framework for owners evaluating an ADU or JADU on a San Diego property.

Planning guide · 6 min read

The most useful ADU decisions are made before a floor plan is finalized. This planning guide identifies the questions that help San Diego owners approach early feasibility, design scope, and documentation with more clarity.

01

Begin with the parcel and existing development

An ADU conversation should start with the address, the existing primary residence or units, prior plans, access, photos, and the intended use. The same desired floor area can have very different implications from one lot to another.

02

Understand what needs project-specific confirmation

City guidance explains broad ADU and JADU standards, while actual feasibility still depends on zoning, overlays, existing conditions, code requirements, and the proposed work. Coastal areas and fire-related conditions can require additional care.

03

Prepare a better first consultation

A useful first meeting brings together the owner’s goals, property information, site photographs, any survey or prior drawings, and the decisions that need the most clarity. This creates a more efficient path to a feasibility and documentation strategy.

Informational only. Requirements and review procedures can change and should be verified for the specific property. Review current City of San Diego ADU/JADU guidance

Start with a clearer brief.

Share your address, early questions, and any project documents.

Request a consultation