Yes — any conversion that adds habitable space (insulation, HVAC, electrical) requires a building permit. Adding a bathroom or kitchenette requires additional MEP permits. We handle all filings and inspections with Dallas, Plano, or your local municipality.

Typically no — habitable spaces require permanent exterior walls. We replace the garage door with a framed wall, windows, and an entry door. The original header is usually sufficient, but we verify structural loads.

We use self‑leveling concrete overlay (1–2 inches) to create a flat surface. A moisture barrier is installed first to prevent vapor intrusion. For ADUs with plumbing, we core‑drill for drain lines before leveling.

Mini‑split ductless systems are the industry standard — they provide independent zone control, high efficiency, and don't require ductwork. We size based on square footage and insulation levels (typically 12,000–24,000 BTU).

Most conversions take 6–10 weeks from permit approval to completion. ADUs with bathrooms add 2–3 weeks. Permits themselves take 3–5 weeks in Dallas, 4–6 weeks in Plano.

Garage conversions typically recoup 70–85% of costs at resale. ADUs that generate rental income can pay for themselves in 5–7 years. In Highland Park and Preston Hollow, converted garages add significant square footage value.

Absolutely. We core‑drill through the slab to connect to existing sewer lines, run new water lines, and install ventilation. Bathrooms add $8,000–$15,000 depending on distance to main stack and fixture selection.