Timeline evidence
Gather available records that help establish when the unit and major alterations existed.
Field note 06 · Existing unit
Fullerton’s existing-ADU path starts with date and evidence.
Fullerton publishes an AB 2533 guide and checklist for certain ADUs and JADUs built before January 1, 2020. That is a specific legalization inquiry—not permission to keep building or conceal unsafe work.
01 · Threshold question
Was the unit built before January 1, 2020?
The City’s published AB 2533 materials describe a path aimed at qualifying pre-2020 ADUs and JADUs. Read the current guide and checklist together, then confirm applicability with Fullerton staff before relying on the process.
02 · Evidence file
Build a factual record before proposing corrections.
Existing conditions
Document use, dimensions, construction, utilities, life-safety features, and visible deficiencies.
Correction scope
Separate required investigation and safety work from desired remodel or expansion work.
03 · Important limits
Every existing unit has its own record and correction list.
The age threshold alone does not establish eligibility, safety, or approval. The current City materials and staff determination control. Do not begin corrective construction before understanding permit requirements.
Existing unit? Preserve evidence.
Avoid removing finishes or changing conditions before the qualified professionals and agencies determine what documentation is needed.
Create an existing-unit brief04 · Existing-condition work
Separate documentation from physical correction.
An existing living area may need records research, measurements, drawings, code analysis, opening of concealed work, testing, repairs, or complete replacement of some systems. The permit path and construction scope should state what is known and what investigation may reveal.
Do not cover a safety concern while waiting for a broader legalization strategy. Electrical hazards, gas concerns, active leaks, moisture, unsafe exits, or structural movement deserve prompt attention from qualified professionals.
When comparing proposals, ask whether the price includes exploratory work, documentation, response to City comments, correction construction, inspections, and restoration. Avoid a fixed promise based only on photographs or a brief description of the space.
Move the project forward
Know what the next decision needs to answer.
Call with the current plan, permit comments, or estimate. We will discuss the construction issue in front of you and what evidence is still missing.