01
Requirements
Read the lot, existing structures, access, utilities, and the current local standards before choosing a plan.
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Residential field note · Fullerton, California
Your Fullerton ADU contractor—starting with the property.
We help Fullerton homeowners shape detached ADUs, additions, garage conversions, and JADUs into a clear, permit-aware construction scope.
10+ yearsof residential construction experience
Who
Fullerton homeowners considering an accessory dwelling unit.
WhatProperty review, scope development, pre-submittal coordination, and construction planning.
Field guide 01–06
Choose the question before the floor plan.
Each path below solves a different owner decision. Together they form a practical sequence from property facts to a comparable scope.
02
Permits & plan check
Organize a coordinated package around the City’s current building code and submittal expectations.
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Garage conversion
Test the permitted shell, slab, moisture, fire separation, utilities, and parking assumptions.
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ADU types
Compare detached, attached, conversion, and junior units by property fit—not by a generic template.
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Cost & scope
Separate design, City and agency items, site work, construction, finishes, and contingencies.
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Existing ADU path
Understand the City’s AB 2533 materials for units built before January 1, 2020.
Open this field note →Current-code checkpoint
January 1, 2026 changed the code baseline.
Fullerton’s current building-codes page says the 2025 California codes, with local amendments, apply to projects submitted on or after January 1, 2026. Confirm the edition and project conditions before relying on older checklists.
Existing conditions
Start with property records, the legal status of existing structures, and a measured understanding of the site.
Utility and access assumptions
Trace likely sewer, water, electrical, drainage, and construction-access paths before locking the layout.
Coordinated scope
Make the drawings, specifications, allowances, exclusions, and proposal milestones describe the same project.
Use before style
Design the daily routine, not only the square footage.
Privacy, daylight, storage, accessible circulation, outdoor connection, and the relationship to the main home can matter as much as a room count.
Compare ADU types →Browser-local worksheet
Build a useful project brief.
Record property facts, intended use, project type, unknowns, and priorities. Nothing is submitted; the worksheet stays in this browser unless you download it.
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