ADU Pre-Construction
Get the details ready before work begins.
Pre-construction turns an agreed concept into coordinated documents, decisions and a buildable scope.
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The preparation checklist
Discuss site documentation, survey needs, architectural drawings, structural engineering, energy compliance and utility coordination. Confirm what is included in the agreement and what is handled by outside professionals.
Prepare for permit and pricing
Coordinate the submission package and responses to agency comments. Compare construction pricing against the same drawings and selections. Identify provisional allowances before they become surprises.
Prepare for the site work
Agree on access, storage, working areas, communication and the effect on the occupied home. Confirm permit status, utility timing and long-lead items before setting a start date. Pre-construction pricing depends on the required scope.
Start with the California ADU Handbook.
The March 2026 edition covers statewide ADU and JADU planning topics. Download the 55-page PDF free, with no signup required.
Bring the plan back to your property.
Virtual Estimates Available. Share your address and goals to discuss the next step.
Request a feasibility reviewBrowse all ADU resources