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Junior ADU · Newark · 403 sq ft

Junior ADU in an attached garage

The cheapest square footage on most Bay Area lots is the square footage you already own. This is what it takes to make it legal to live in.

Project type
Junior ADU
City
Newark
Size
403 sq ft
Layout
1 bed, 1 bath

An example project. The scope and the structural condition are real for this project type. The size and the city are typical rather than drawn from a named client.

Before and after

A two car garage turned into a permitted junior ADU inside the shell that is already there. No new foundation, no new roof.

Before for junior adu in an attached garage in Newark
Beforethe existing condition
Proposed design for junior adu in an attached garage in Newark
Proposed designthe same lot, built

The drawings

Floor plan and elevation.

Floor plan for junior adu in an attached garage in Newark
Floor planproposed
Elevation for junior adu in an attached garage in Newark
Elevationproposed

3D view

The new work, on its own.

3D view for junior adu in an attached garage in Newark
3D viewrendering

The structural solution

What makes this project structural.

Two 8 ft garage door openings in one wall. The lateral system has to work around what is left of that wall, and the infill has to be tied back into a slab and a shell that were never built to the code the finished room has to meet.

The opening is infilled and braced, and the remaining wall is proved rather than assumed. Holddowns land on a new footing poured inside the existing slab, and the sill anchorage is called out with the inspection note that lets the pour pass first time.

Schematic of the structural condition
Schematicblack existing, gold new, red the condition

Permit scope

What is drawn and submitted.

  • Full permit set, 15 sheets
  • Structural design and stamped calculations
  • Title 24 energy documents
  • City application forms and valuation

At a glance

  • Inside the existing shell
  • No new foundation
  • Ministerial JADU review

Service

Garage Conversions

Attached and detached garages turned into permitted living space inside the shell that is already standing.

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