Home addition cost in South Carolina
Statewide estimate from BLS wages and BEA prices. Reviewed Nov 4, 2026.
- Statewide range (300 sq ft)
- $33,500 – $67,900
- Per sq ft
- $110 – $220
- before permit
- Versus US midpoint
- −12%
- US $57,500
- Metros covered
- 7
What does it cost to build a home addition in South Carolina? Plan on $33,500 to $67,900 for 300 sq ft. Wages (0.84x the US blend), materials (price index 96.3) and permit costs (93.7) put the state below the national midpoint by 12%.
Inside South Carolina, the metros we cover range from $48,800 (Myrtle Beach) to $50,900 (Spartanburg) at the midpoint. Pick your closest city in the table for a tighter number.
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Estimated cost for 300 sq ft in South Carolina (statewide), standard level
$43,800 to $57,600
About $143 to $187 per sq ft before permits. Labor is about 63% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $15,000 | $19,700 |
| Labor | $27,900 | $36,500 |
| Permits and fees | $890 | $1,450 |
| Total | $43,800 | $57,600 |
Cost breakdown for 300 sq ft in South Carolina
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,600 | $17,300 | $23,100 | 34% |
| Labor | $21,500 | $32,200 | $42,900 | 63% |
| Permits and fees | $470 | $1,150 | $1,850 | 2% |
| Total | $33,500 | $50,700 | $67,900 | 100% |
South Carolina against its neighbors
South Carolina ranks 45 of 51 (the 50 states plus DC) for home addition, where 1 is the most expensive. The costliest is Hawaii at $76,300 and the cheapest Arkansas at $48,200, both for 300 sq ft at the midpoint. South Carolina sits at $50,700. The five states closest by workforce center are listed below.
| State | Distance | Range | Midpoint | vs. here |
|---|---|---|---|---|
| North Carolina | 120 miles away | $33,300 – $67,500 | $50,400 | −1% |
| Georgia | 180 miles away | $34,100 – $69,200 | $51,700 | +2% |
| Virginia | 300 miles away | $36,100 – $73,300 | $54,700 | +8% |
| West Virginia | 340 miles away | $34,400 – $69,700 | $52,100 | +3% |
| Tennessee | 350 miles away | $33,800 – $68,600 | $51,200 | +1% |
South Carolina metro-by-metro prices
0 of the 7 metros sit above the statewide midpoint of $50,700, and the top-to-bottom gap is 4%. Each row prices the default size with that metro's own BLS wages and BEA price levels, so the gap between rows is real local variation rather than a flat markup.
| Metro | Range (300 sq ft) | Midpoint | vs. state |
|---|---|---|---|
| Spartanburg, SC | $33,600 – $68,100 | $50,900 | level |
| Charleston, SC | $33,600 – $68,200 | $50,900 | level |
| Greenville, SC | $33,400 – $67,700 | $50,600 | level |
| Hilton Head, SC | $33,300 – $67,600 | $50,500 | −1% |
| Florence, SC | $33,100 – $67,000 | $50,100 | −1% |
| Columbia, SC | $32,900 – $66,800 | $49,900 | −2% |
| Myrtle Beach, SC | $32,200 – $65,400 | $48,800 | −4% |
Related projects, priced for South Carolina
The table prices neighboring jobs at their usual sizes using statewide South Carolina wages and prices. Against national midpoints, kitchen remodel comes out highest (−6%) and roof replacement lowest (−11%), because each job leans on different trades.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $17,300 – $29,500 | −6% |
| Bathroom remodel | 45 sq ft | $4,200 – $20,700 | −11% |
| Detached garage | 576 sq ft | $26,500 – $53,100 | −9% |
| Roof replacement | 2,000 sq ft of roof | $5,300 – $11,200 | −11% |
Home addition: what moves the price in South Carolina
Type of addition
A new room is $125-$250 per sq ft; a bump-out $85-$200; an attic conversion $50-$150; a garage conversion $50-$200 (HomeGuide).
Plumbing and fixtures
Adding a bathroom or kitchen drives the price up the most.
Permits
Construction permits run $500-$2,000, or $5-$21 per $1,000 of project cost (HomeGuide).
Foundation
A foundation, framing, roofing and matching exterior finishes all have to be built before the interior work starts.
Quality levels and sizes in South Carolina
The cited range is cut into three overlapping bands (basic, standard and premium) and scaled to statewide South Carolina wages and prices. The grid prices the same bands at 3 common sizes.
Basic
$33,500 to $47,300
Bump-out or simple room without plumbing
Standard
$43,800 to $57,600
Standard room addition with HVAC and electrical
Premium
$54,200 to $67,900
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $11,500 – $16,400 | $15,200 – $20,200 | $18,900 – $23,900 |
| 20x20 room (400 sq ft) | $44,500 – $62,700 | $58,100 – $76,300 | $71,800 – $89,900 |
| large suite (600 sq ft) | $66,500 – $93,500 | $86,800 – $113,500 | $107,000 – $134,000 |
Wages behind the South Carolina number
Statewide wages come from BLS's state-level estimates, which blend big cities with small towns and rural areas. 6 trades drive the labor line for this job, and the weighted ratio against the national wage level is 0.84 for South Carolina.
For carpenters (47-2031, weighted 50%) the local median is $24.36 an hour, which is 16% below the national $29.12. The middle half of them earn between $20.97 and $30.10 an hour. BLS counts 6,950 of them working in the state, 30.2 for every 10,000 jobs (US: 43.1), so the local bench is thinner than average.
For cement masons and concrete finishers (47-2051, weighted 10%) the local median is $23.73 an hour, which is 13% below the national $27.41. The middle half of them earn between $21.74 and $29.70 an hour. BLS counts 1,930 of them working in the state, 8.4 for every 10,000 jobs (US: 13.3), so the local bench is thinner than average.
Electricians (47-2111), 10% of the weighting: a median of $28.24 an hour, 7% below the US median of $30.38. The middle half of them earn between $23.03 and $31.82 an hour. About 8,010 work in the state. That is 34.7 per 10,000 jobs, compared with 48.7 nationally, so expect fewer local crews to bid.
For plumbers, pipefitters and steamfitters (47-2152, weighted 10%) the local median is $25.93 an hour, which is 15% below the national $30.67. The middle half of them earn between $22.31 and $30.77 an hour. BLS counts 5,770 of them working in the state, 25.0 for every 10,000 jobs (US: 30.0), so the local bench is thinner than average.
Drywall and ceiling tile installers (47-2081), 10% of the weighting: a median of $21.80 an hour, 23% below the US median of $28.33. The middle half of them earn between $18.36 and $25.56 an hour. About 340 work in the state. That is 1.5 per 10,000 jobs, compared with 5.3 nationally, so expect fewer local crews to bid.
For roofers (47-2181, weighted 10%) the local median is $22.00 an hour, which is 17% below the national $26.65. The middle half of them earn between $18.26 and $25.37 an hour. BLS counts 850 of them working in the state, 3.7 for every 10,000 jobs (US: 8.7), so the local bench is thinner than average.
A crew paid at the 75th percentile for carpenters ($30.10 an hour) would add about $3,750 to the statewide midpoint; one at the 25th percentile ($20.97) would take off about $2,250. Use that as a rough guide to how far a bid can sit from our midpoint on wages alone.
BLS counts 2,305,080 jobs across South Carolina (May 2025), which is 1.5% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $20.97 | $24.36 | $30.10 | $29.12 | 0.84 | state |
| Cement masons and concrete finishers (47-2051) | 10% | $21.74 | $23.73 | $29.70 | $27.41 | 0.87 | state |
| Electricians (47-2111) | 10% | $23.03 | $28.24 | $31.82 | $30.38 | 0.93 | state |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $22.31 | $25.93 | $30.77 | $30.67 | 0.85 | state |
| Drywall and ceiling tile installers (47-2081) | 10% | $18.36 | $21.80 | $25.56 | $28.33 | 0.77 | state |
| Roofers (47-2181) | 10% | $18.26 | $22.00 | $25.37 | $26.65 | 0.83 | state |
| Blended | 100% | 0.84 | |||||
Weather windows across South Carolina
Season matters for home addition. For each South Carolina metro below we took NOAA's 1991-2020 monthly normals from the nearest suitable station and counted comfortable months for digging and ground work.
Charleston has the longest comfortable season of the metros we cover in South Carolina at 12 months; Columbia has the shortest at 9 (September through May). Rainfall runs from 44 inches a year in Columbia to 54 inches in Myrtle Beach.
We do not adjust prices by month, because we have no reliable published data on seasonal pricing. Timing is still worth raising when you collect bids.
| Metro | Jan avg low °F | Jul avg high °F | Precip (in/yr) | Comfortable months |
|---|---|---|---|---|
| Greenville | 35 | 91 | 47 | 11: August through June |
| Columbia | 37 | 93 | 44 | 9: September through May |
| Charleston | 44 | 88 | 44 | 12: all year |
| Spartanburg | 32 | 90 | 50 | 10: February through June and August through December |
| Myrtle Beach | 34 | 87 | 54 | 12: all year |
| Florence | 36 | 92 | 45 | 10: September through June |
| Hilton Head | 40 | 92 | 45 | 10: September through June |
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Detailed home addition report for South Carolina, $9
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Home addition in South Carolina: your questions
+How much does it cost to build a home addition in South Carolina?
$33,500 to $67,900 for 300 sq ft, using statewide wages and prices. Metro areas inside South Carolina can sit above or below that.
+Which city in South Carolina is cheapest for home addition?
Myrtle Beach at about $48,800 (midpoint, 300 sq ft). The priciest is Spartanburg at $50,900.
+Is home addition cheaper in South Carolina than the US average?
It is 12% cheaper: $50,700 against $57,500 for 300 sq ft at the midpoint.
+What share of the price is labor in South Carolina?
About 63% ($32,200). Materials are 34%. Statewide labor for this job is weighted 0.84x the national wage level.
+What do carpenters earn in South Carolina?
The BLS statewide median is $24.36 an hour, against $29.12 for the US. The 25th to 75th percentile range is $20.97 to $30.10.
+Where does South Carolina rank for home addition costs?
45th most expensive of 51 (the 50 states plus DC) at the midpoint, $50,700 for 300 sq ft. Rank 1 is the costliest.
+What do basic and premium home addition work cost in South Carolina?
For 300 sq ft, basic work runs $33,500 to $47,300 and premium work $54,200 to $67,900. Basic means: bump-out or simple room without plumbing. Premium means: large addition with bath or kitchen and a new foundation.
+Does the season matter for home addition in South Carolina?
Yes where winters or summers are hard. Of the South Carolina metros we cover, Charleston has the most comfortable months (12 of 12) based on NOAA 1991-2020 normals. Our prices do not change by month, so ask contractors whether they charge more or less in busy and slow seasons.
Home addition by city in South Carolina
Where these numbers come from
Base prices are national ranges from the sources below. We scale labor by local BLS wages, materials by BEA goods prices and permits by the BEA all-items price level. Full method on the methodology page.
- HomeGuide: How Much Does a Home Addition Cost? (2026) (accessed November 4, 2026)
- Cost to Renovate: Renovation Labor Report 2026: Where the Money Goes (accessed November 4, 2026)
- HomeGuide: 2026 Building Permit Costs | Fees & Cost Calculator (accessed November 4, 2026)
- BLS Occupational Employment and Wage Statistics, May 2025
- BEA Regional Price Parities, 2024
- NOAA NCEI U.S. Climate Normals, 1991-2020
Note on derived figures: Materials = 32% of the installed price, from Cost to Renovate's mid-range 'Structural' category split (56% labor, 32% materials, 11% permits and design). It is a category average rather than an addition-specific figure.