Permit-Ready ADU & Tenant Improvement Plans in California

Architectural, structural, and MEP drawings for ADUs, JADUs, garage conversions, and commercial tenant improvements, ready for plan check in Los Angeles, the Bay Area, and San Diego.

Revisions Cost More Than Mistakes

FASTBUILD focuses on coordinated architectural and structural work. Many of our projects are structure-driven, permit-sensitive, and revision-prone by nature. The breakdown shows where our experience is concentrated.

Project Experience

Take a look at some of our recent work — mostly ADUs and tenant improvements. From adding new living space to your home to getting a commercial unit ready for business, we take care of the design, permits, and building every step of the way. See all the areas we serve.

Garage Conversion in Corona

Cape Cod-Style Custom Home in Vermont

Retail-to-Flex Tenant Improvement

Randolph Storage to ADU Conversion

Have a project in mind?

Start Your Project With Confidence

Book a free consultation and get expert guidance on your project, timeline, and permit requirements.

Start Your Project With Confidence

Book a free consultation and get expert guidance on your project, timeline, and permit requirements.

Have a project in mind?

From architectural plans to structural engineering and permit documents, Fast Build can help turn your idea into buildable plans.

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