How Much Does Room Addition Cost in South Carolina?
South Carolina pricing is below the national average. Updated for 2026.
Room Addition Pricing in South Carolina
In South Carolina, the average cost for room addition is $39,150 per project, which is 13% lower than the national average of $45,000. Most South Carolina residents pay between $17,400 and $69,600.
South Carolina benefits from a lower cost of living than many states, resulting in more affordable pricing for room addition. This makes it one of the more budget-friendly states for this service.
A room addition extends your home's footprint by building a new room — bedroom, family room, home office, or in-law suite. It's one of the most expensive renovations but adds significant living space and value.
South Carolina vs National Average
What Affects Room Addition Cost in South Carolina?
Size
Small (100 sq ft): $15,000-$25,000. Average (200 sq ft): $30,000-$50,000. Large (400+ sq ft): $60,000-$100,000+
Room Type
Basic bedroom: $20,000-$40,000. Bedroom + bathroom: $35,000-$65,000. In-law suite: $50,000-$100,000+
Per Sq Ft
Budget: $80-$150/sq ft. Mid-range: $150-$250/sq ft. High-end: $250-$400+/sq ft
📐 Room Addition in South Carolina Cost Calculator
Get a personalized estimate based on your project details
Get Free Renovation Estimates
Connect with licensed contractors for your project.
Top-Rated Room Addition Pros in South Carolina
5 providersModern Edge Kitchen & Bath
⭐ PREMIUMProudly serving SC since 2004. Licensed, insured, and committed to excellence.
Dream Home Builders
✅ VERIFIEDBuildRight Renovations
Are You a Room Addition Professional?
Get listed on CostWhale and reach thousands of customers searching for room addition in South Carolina.
💡 Tips to Save on Room Addition in South Carolina
- 1.A bump-out (extending an existing room 2-4 feet) costs $5,000-$15,000 — much less than a full addition
- 2.Building over an existing garage or patio saves on foundation costs
- 3.A dormer addition (expanding attic space) costs 30-50% less than a ground-floor addition
- 4.Act as your own general contractor if you have experience — save 15-25% on management fees
📈 Room Addition in South Carolina Cost Trends (2020–2024)
Prices have increased +17.7% over the last 5 years
| Year | National Avg | YoY Change |
|---|---|---|
| 2020 | $33,254 | — |
| 2021 | $34,651 | +4.2% |
| 2022 | $36,903 | +6.5% |
| 2023 | $37,936 | +2.8% |
| 2024 | $39,150 | +3.2% |
Based on national averages adjusted for annual inflation. Actual costs vary by location and project scope.
💬 What Did You Pay?
Real costs reported by homeowners for Room Addition in South Carolina
Recent Reports
Frequently Asked Questions
Does a room addition increase home value?
Yes, though ROI varies: 50-65% for a standard room addition, 60-75% for a bedroom + bathroom addition. The value also depends on whether the addition fits the neighborhood — over-improving for your area yields lower returns.
How long does a room addition take?
Typical timeline: 2-4 weeks for permits and planning. 8-16 weeks for construction. Total: 3-5 months. Complex additions with full bathrooms or custom features can take 6-12 months.
Room Addition Cost in Other States
Related Cost Guides for South Carolina
🔍 Get Free Quotes from Local Pros
Compare prices from pre-screened contractors in your area. Free, no-obligation estimates.
* CostWhale may earn a commission. This doesn't affect our pricing data or recommendations.
💰 Get Weekly Cost-Saving Tips
Join 10,000+ smart homeowners. Unsubscribe anytime.