The Complete Home Additions Guide

Home Addition Costs in Georgia and Florida

Home additions create entirely new living space, requiring foundation work, framing, roofing, and integration with existing systems. Understanding costs and complexities helps you make an informed decision.

Cost Per Square Foot

Standard room additions cost $150–$280/sq ft (GA) and $175–$320/sq ft (FL). Kitchen additions run $200–$400/sq ft. Sunrooms are $100–$250/sq ft. Second-story additions range $200–$350/sq ft and involve the most complex engineering.

In-Law Suites and ADUs

A typical 500–800 sq ft in-law suite with bedroom, bathroom, kitchenette, and living area costs $100,000–$220,000 (GA) and $120,000–$260,000 (FL). Zoning varies significantly — research local ADU regulations before planning.

Foundation Considerations

In Georgia, heavy clay soils require careful foundation design ($8–$20/sq ft). In Florida, sandy soils, high water tables, and flood zone regulations create additional complexity ($10–$25/sq ft). Flood zone properties may require elevated foundations.

Build vs. Buy Decision

Before committing, evaluate whether adding on is more cost-effective than moving. Consider the addition cost vs. price difference for a larger home, transaction costs (8–10% of sale price), construction disruption, and your attachment to your neighborhood.