Home Addition Cost Calculator
Room additions in Upstate SC typically cost $200–$340 per square foot depending on finishes, HVAC, plumbing, and structural complexity — a 400 sqft addition typically runs $78,000–$152,000. Use this calculator for a realistic planning range.
Competitive local pricing for Simpsonville, Fountain Inn, Gray Court & Greenville County — transparent 20% overhead & profit.
Planning more than one project? Try our all-in-one Project Cost Calculator.
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How much does a room addition cost in Upstate SC?
Room additions in Upstate SC typically cost $200–$340 per square foot depending on finishes, HVAC, plumbing, and structural complexity — a 400 sqft addition typically runs $78,000–$152,000. Use this calculator for a realistic planning range.
| Tier | Price Range | Typical at 400 sq ft | What's Included |
|---|---|---|---|
| Basic Finish Addition | $196-236/sq ft | $78,316–$94,317 | Standard finishes, functional layout, code-compliant |
| Standard Living Space Addition | $248-299/sq ft | $99,262–$119,541 | Quality finishes, HVAC, updated fixtures, good flow |
| Premium Custom Addition | $316-381/sq ft | $126,581–$152,442 | High-end finishes, custom features, premium materials |
| Luxury Master Suite (300+ SF) | $353-425/sq ft | $141,152–$169,989 | Luxury master bedroom, spa bath, custom closet, premium everything |