Consult your municipality about structural changes, electrical upgrades, gas lines, window replacements, and exterior alterations. Some jurisdictions require permits even for fences or decks. Document everything, including drawings and load calcs. Starting compliant avoids fines, protects safety, and ensures appraisers recognize the improvements you paid for.
Coordinate rough in and final inspections to match your phasing, leaving access points open until sign off. Build buffer days for reinspections. Keeping the official schedule aligned with reality avoids rushed work, preserves warranties, and lets you close walls confidently, with photos archived for future reference.