Junior ADU

Rapid suite conversion entirely within your existing home. Zero yard space required, delivering your full core blueprint set with minimum investment.

A bespoke architectural space planning service optimized for repurposing underutilized interior spaces into a legal Junior ADU (JADU). We expertly reimagine your existing spare bedrooms, attached garages, or master suites within California's strict 500 sq. ft. legal limit—incorporating a mandatory efficiency kitchen, a dedicated exterior entrance, and smart layout flow (with options for private or shared sanitation). Whether creating an independent suite for adult children/caretakers, or seeking the fastest, lowest-cost way to unlock immediate rental income without building from the ground up, you will secure a high-value, compliant asset, complete with your full core conceptual blueprint set.

What’s included in our Junior ADU design services?

Development Potential Analysis

A formal feasibility and regulation audit tailored for interior conversions. It verifies compliance with the 500 sq. ft. statutory cap, assesses utility capacity for efficiency kitchens, and outlines local fee-exemption advantages, complete with a preliminary proposed site and layout plan.

As-Built Drawings

A high-precision digital survey of the existing primary residential structure. By taking exact field measurements of framing, existing plumbing stacks, and entry points, you will receive the verified baseline floor plan necessary for interior re-demarcation.

Junior ADU(JADU) Designs

A high-efficiency programmatic architectural concept and space planning service. Through close collaboration to maximize tight spaces, we refine your dedicated exterior entry, built-in kitchen amenities, and acoustics/privacy buffers, delivering a full concept package including the Site Plan, Floor Plan, and Interior Elevations.

Technical Drafting

An advanced building code compliance process for interior structural modifications. As our professional team drafts complete construction documents incorporating firewall barriers, egress compliance, and streamlined utility tie-ins, you will receive the full construction package (Structural Plans, Structural Calculations, Electrical Plan, and Title 24 report), as well as authorized professional engineering stamps.

Plan Permit Processing

A comprehensive municipal liaison and agency coordination service. By managing the formal submittal to the building department and ensuring full impact fee waivers where applicable under state law, we directly clear all plan checker corrections until your building permit is officially issued.

How does the Junior ADU Design process work?

Phase 1

Development Potential Analysis – Upon completing the interior conversion feasibility analysis, you will receive the formal zoning audit findings and a preliminary layout concept, as well as a $450 professional fee invoice.

Phase 2

As-Built Survey – Upon completing the on-site digital measurements of the conversion zone, you will receive the verified existing Floor Plan, as well as the formal design contract and corresponding phase invoice.

Phase 3

ADU Designs – Upon completing the custom space layout coordination, you will receive the full core architectural design set (Site Plan, Floor Plan, and Exterior/Interior Layouts), as well as a formal scheme sign-off sheet.

Phase 4

Technical Drafting – Upon completing the interior engineering compliance calculations, you will receive the full construction package (Structural Plans, Structural Calculations, Electrical Plan, and Title 24 report), as well as authorized professional engineering stamps.

Phase 5

Plan Permit Processing – Upon clearing all regulatory municipal plan reviews, you will receive the final city-approved blueprint package, as well as your legally authorized building permit (Permit).