Sunroom Addition Cost Calculator
Key Takeaways 🔥 Build a four-season sunroom to add official square footage and value🔥 Use low U-factor, climate-matched SHGC glass to control heat gain🔥 Check IRC/NSA category—I–V defines true seasonality, not marketing🔥 Four-season rooms need code-compliant foundations—plan for higher costs🔥 Three-season rooms offer 50–70% ROI; four-season can return 60–80% Understanding Sunroom Options Defining Common Sunroom…