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Guides

ADU cost guides built around the real product packet.

No generic filler. Each guide explains a piece of the budget stack or approval boundary.

GuideADU Cost BlogRead guideGuidePrefab ADU Cost vs Installed CostRead guideGuideADU Building Permits After Factory ApprovalRead guideGuideModular ADU Floor Plan Cost: 1L vs 3LRead guideGuideADU Foundation, Utilities, and Site Work CostRead guideGuidePrefab ADU California Quality ChecklistRead guideGuideADU Approval and License ChecklistRead guideGuideADU Certificates and Standards HubRead guideGuideWhy ADU Certificates MatterRead guideGuideFloorScore Indoor-Air FlooringRead guideGuideIndoor Air Comfort GoldRead guideGuideFire, Slip, Wear, and Sound TestsRead guideGuideADU Cost Calculator MethodRead guideGuidePrefab ADU Cost GuideRead guideGuideADU Building Permits Cost GuideRead guideGuideADU Site Work Cost Calculator GuideRead guideGuide1L vs 3L ADU Cost GuideRead guideGuideCalifornia ADU Cost StackRead guideGuideFactory-Built vs Site-Built ADU BudgetingRead guideGuideWhat CA FBH Approval Does and Does Not CoverRead guideGuideSite Work Checklist for Modular ADUsRead guideGuideFlooring and Wall Panel Finish AllowancesRead guideGuideR-22345 3L Structural Engineering InformationRead guideGuideR-22348 1L Structural Engineering InformationRead guide