The lot math
Infill economics here are land-led. A buildable in-town lot with utilities, canopy, and walkability commands a price that only supports a substantial house, which is why so few modest new houses get built. Understanding that math explains most of what buyers find puzzling about the results.
Zoning and what it permits
Charlotte's Unified Development Ordinance governs setbacks, height, lot coverage, and permitted forms, and its adoption meaningfully changed what is possible on in-town lots including duplex and ADU options in many places. Designated historic blocks add exterior design review on top. Confirm both before assuming a scope.
Building something the street accepts
The new houses that age well share a short list of decisions: porch depth that matches the block, roof pitch within the neighborhood's range, window proportions that are vertical rather than square, materials with real depth, and a garage that is not the primary facade. None of this requires imitation — it requires reading the street before drawing.