What Affects the Scope
Foundation, framing, roof and wall connections must work with existing conditions. Utilities, floor levels and drainage may also need changes. The proposed scope should identify unknowns, professional responsibilities and how changes will be handled if concealed conditions are uncovered.
What to share
- Property location
- Intended room use
- Approximate size
- Photos
- Survey or plans
- Utility changes
- Occupancy
Addition or ADU?
Choose an addition when the new area connects to the existing structure. A detached accessory dwelling unit has separate lot, setback, utility, access, and use questions. Feasibility for either path depends on the property and applicable restrictions.