Historic ADU with Pool and Large Bonus Space

Creating a Historic ADU in San Diego’s University Heights

This project showcases how thoughtful design can bring a historic ADU to life while respecting the character of an original Spanish Eclectic (Spanish Colonial Revival) home. Located in one of San Diego’s most architecturally rich neighborhoods, the homeowners set out to maximize their property’s potential, add flexible living space, and create a true backyard retreat.

This project achieves a rare balance: the ADU clearly belongs on the property, yet it stands on its own architecturally. It’s a model for how historic ADUs in San Diego can meet preservation requirements while still delivering contemporary comfort and flexibility.

Balancing Preservation and Modern Living

The existing 1929 residence features hallmarks of the Spanish Eclectic style: white stucco walls, a mix of flat parapet and red clay tile gable roofs, and asymmetrical massing. When it came time to add an accessory dwelling unit, the project went through historic review, which required the new construction to remain visually distinct from the original home while still complementing it.

The resulting ADU follows a Contemporary/Modernist approach: clean lines, an L-shaped plan, a flat parapet roof, and smooth white stucco. These choices echo the massing and materials of the main house without replicating its decorative elements.

A Flexible and Functional Layout

The 1200 SF L-shaped ADU was constructed with matching white stucco and a flat roof, mirroring the architectural style of the main home. The result is a cohesive, beautifully integrated backyard compound that not only elevates the homeowner’s lifestyle but also adds long-term value and flexibility to the property.

The unit offers a spacious two-bedroom, one-bathroom layout with an additional bonus room area. This flexible space easily adapts to the homeowners’ changing needs, serving as a home office, TV lounge, and home gym. By planning for multifunctional use from the outset, the design ensures the ADU remains valuable for decades to come.

An Outdoor Oasis Between Old and New

The ADU is positioned to shape a private backyard compound shared with the historic home. Between the two structures, the homeowners created a lush, resort-like space complete with palm trees, a plunge pool, multiple seating areas, and even a putting green. This outdoor environment blurs the line between indoor and outdoor living, adding both lifestyle and property value. Read more about adding a pool alongside an ADU.