Diamond Bar
ADU Design Diamond Bar – Custom Plans, Permits & Build-Ready Designs
Bring your property vision to life with expert ADU Design in Diamond Bar. From stylish backyard homes to smart garage conversions, we create custom plans, permit-ready drawings, and build-ready designs that blend modern living with long-term value.
500+ Projects Delivered
Across Residential & Commercial Design
20+ Years Experience
Architectural + Structural Expertise
Permit Guarantee
Optimized for City Approval Process
ADU Design Diamond Bar – Custom Plans, Permits & Build-Ready Designs
Services
Services
3
Architectural Designer
50+
Project Experiences
1
Drafting Service
Uni Construction provides professional architectural and construction drafting services in Los Angeles and the San Gabriel Valley. We prepare accurate, permit-ready drawings for ADUs, additions, renovations, remodels, and light commercial work.
70+
Project Experiences
2
Building Designer
Uni Construction is a full-service design-build firm serving Los Angeles and the San Gabriel Valley. We handle building design for ADUs, custom homes, additions, renovations, and commercial spaces with construction realities in mind.
70+
Project Experiences
Design Projects
Construction Projects
ADU Types
Detached ADU
A standalone unit built separately from your main home. We handle the full design — site planning, structural engineering, and permit-ready drawings — all code-compliant and tailored to your property.
Attached ADU
A unit connected to your existing home with its own entrance, kitchen, and bathroom. Ideal when yard space is limited. We design attached ADUs that integrate with your home's structure while meeting all building and zoning requirements.
Garage Conversion
Transform your existing garage into a fully permitted living space. Our team evaluates your current structure — foundation, framing, electrical, and plumbing — and designs a conversion that meets California building codes.
Junior ADU (JADU)
A compact unit of up to 500 sq ft created within your existing home. JADUs are the most affordable ADU option — no new foundation required — and are often exempt from impact fees under California law.
Detached ADU
A standalone unit built separately from your main home. We handle the full design — site planning, structural engineering, and permit-ready drawings — all code-compliant and tailored to your property.
Detached ADU
Detached ADU
Attached ADU
A unit connected to your existing home with its own entrance, kitchen, and bathroom. Ideal when yard space is limited. We design attached ADUs that integrate with your home’s structure while meeting all building and zoning requirements.
Attached ADU
Attached ADU
Garage Conversion
Transform your existing garage into a fully permitted living space. Our team evaluates your current structure — foundation, framing, electrical, and plumbing — and designs a conversion that meets California building codes.
Garage Conversion
Garage Conversion
Junior ADU (JADU)
A compact unit of up to 500 sq ft created within your existing home. JADUs are the most affordable ADU option — no new foundation required — and are often exempt from impact fees under California law.
Junior ADU (JADU)