Randolph ADU

Project Overview – Multi-Unit ADU Development

Year: 2025
Project Name: Randolph ADU
Location: Huntington Park , California

This project introduces a comprehensive transformation of an existing residential lot through the addition of four thoughtfully designed Accessory Dwelling Units (ADUs). The goal is to increase functional housing capacity while maintaining full compliance with local zoning, building codes, and site constraints.

Two existing structures—a storage building and a parking area—are strategically converted into new ADUs, while two additional second-story ADUs are constructed above them. The result is a compact, efficient, and well-integrated micro-community that enhances livability for current and future occupants.

Scope of Work

ADU 1 – Existing Storage Conversion (499 sq ft)
An existing single-story storage structure is fully renovated and upgraded to meet residential standards. This unit includes a new interior layout, utility upgrades, and complete conversion into a fully functional living space.

ADU 2 – Second-Story ADU Above ADU 1 (422 sq ft)
A new construction unit added above ADU 1, designed as a lightweight, efficient second-story structure with independent access, meeting all required setbacks and height limits.

ADU 3 – Existing Parking Area Conversion (527 sq ft)
An underutilized parking area is adapted into a new ground-floor ADU. The design optimizes the existing footprint to create a comfortable and private residential unit.

ADU 4 – Second-Story ADU Above ADU 3 (526 sq ft))
A new second-story ADU is constructed above ADU 3, mirroring the approach used on the opposite side of the property to create a balanced and cohesive site layout.

Site Strategy & Design Approach

The design focuses on maximizing the use of existing structures while respecting property boundaries, access requirements, and neighborhood character. Key design considerations include:

• Maintaining required 4-foot setbacks along the alley.
• Providing efficient vertical circulation for second-story ADUs.
• Preserving vehicular access and utilities (water meters, electrical panels, sewer alignment).
• Ensuring privacy, daylight, and ventilation between units and adjacent homes.

A bird’s-eye site perspective illustrates the arrangement: two existing structures repurposed as lower units (ADU 1 and ADU 3), and two newly constructed upper units (ADU 2 and ADU 4) forming a balanced four-unit ADU cluster.

Architectural Vision

The project transforms an aging site into a practical, modern housing solution without disrupting the surrounding neighborhood fabric. By leveraging both adaptive reuse and new construction, it creates:

Sustainable density
Sustainable density
• Affordable small-scale residential units
• A cohesive architectural aesthetic across all four ADUs

This ADU development demonstrates how thoughtful design can unlock new value in existing properties while supporting urban housing needs.