Home addition cost in Baton Rouge, LA
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $36,100 – $73,100
- Per sq ft
- $119 – $238
- before permit
- Versus US midpoint
- −5%
- US $57,500
- Rank of 300 metros
- #149
- 1 = most expensive
If you want to build a home addition in Baton Rouge, plan on $36,100 to $73,100 for 300 sq ft, all in. Per sq ft, that is $119 to $238 for materials and labor, with the permit on top. The local midpoint runs 5% lower than the national one. Carpenters earn a median of $26.75 an hour in the Baton Rouge area, 8% below the US median of $29.12.
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Estimated cost for 300 sq ft in Baton Rouge, LA, standard level
$47,200 to $62,000
About $154 to $202 per sq ft before permits. Labor is about 67% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $14,600 | $19,100 |
| Labor | $31,700 | $41,500 |
| Permits and fees | $860 | $1,400 |
| Total | $47,200 | $62,000 |
Cost breakdown for 300 sq ft in Baton Rouge, LA
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,200 | $16,900 | $22,500 | 31% |
| Labor | $24,400 | $36,600 | $48,800 | 67% |
| Permits and fees | $450 | $1,150 | $1,800 | 2% |
| Total | $36,100 | $54,600 | $73,100 | 100% |
Where the Baton Rouge price comes from
Labor is 67% of the midpoint bill here, against 67% nationally. The mix of trades behind this job is carpenters (50%), cement masons and concrete finishers (10%), electricians (10%), plumbers, pipefitters and steamfitters (10%), drywall and ceiling tile installers (10%), roofers (10%). We weight each trade's local median wage by that share and compare it with the national median. In Baton Rouge the blended ratio comes out at 0.96.
On the materials line, the BEA goods price index for the Baton Rouge metro is 93.7 (US = 100). The midpoint materials bill for 300 sq ft comes to $16,900, compared with $18,000 at national prices. Permit and inspection fees are scaled by the broader index (90.8) and land at $450 to $1,800.
Baton Rouge labor market for home addition
Wages are the part of this estimate that changes most from town to town. 6 trades carry the job here, and each is compared with its US median. The weighted result for Baton Rouge is 0.96 times the national level.
For carpenters (47-2031, weighted 50%) the local median is $26.75 an hour, which is 8% below the national $29.12. The middle half of them earn between $23.20 and $29.27 an hour. BLS counts 3,490 of them working in the area, 85.2 for every 10,000 jobs (US: 43.1), so the local bench is deeper than average.
For cement masons and concrete finishers (47-2051, weighted 10%) the local median is $29.45 an hour, which is 7% above the national $27.41. The middle half of them earn between $21.79 and $35.01 an hour. BLS counts 250 of them working in the area, 6.1 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 $31.41 an hour, 3% above the US median of $30.38. The middle half of them earn between $28.11 and $37.40 an hour. About 3,320 work in the metro. That is 81.0 per 10,000 jobs, compared with 48.7 nationally, which suggests plenty of local crews to bid.
For plumbers, pipefitters and steamfitters (47-2152, weighted 10%) the local median is $35.69 an hour, which is 16% above the national $30.67. The middle half of them earn between $30.03 and $37.19 an hour. BLS counts 2,790 of them working in the area, 68.1 for every 10,000 jobs (US: 30.0), so the local bench is deeper than average.
Drywall and ceiling tile installers (47-2081), 10% of the weighting: a median of $23.15 an hour, 18% below the US median of $28.33. The middle half of them earn between $13.61 and $37.38 an hour. About 100 work in the metro. That is 2.4 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 $23.70 an hour, which is 11% below the national $26.65. The middle half of them earn between $21.03 and $26.21 an hour. BLS counts 220 of them working in the area, 5.4 for every 10,000 jobs (US: 8.7), so the local bench is thinner than average.
Quotes come from real crews, not medians. If the carpenters on your job are paid at the 75th percentile ($29.27 an hour) instead of the median, the labor line grows by about $1,650. At the 25th percentile ($23.20) it shrinks by about $2,350. The total moves by 3.0% or 4.3%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 409,690 jobs in the Baton Rouge area. That makes it the 60th largest of the 300 metros we cover, with 0.26% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $23.20 | $26.75 | $29.27 | $29.12 | 0.92 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $21.79 | $29.45 | $35.01 | $27.41 | 1.07 | metro |
| Electricians (47-2111) | 10% | $28.11 | $31.41 | $37.40 | $30.38 | 1.03 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $30.03 | $35.69 | $37.19 | $30.67 | 1.16 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $13.61 | $23.15 | $37.38 | $28.33 | 0.82 | metro |
| Roofers (47-2181) | 10% | $21.03 | $23.70 | $26.21 | $26.65 | 0.89 | metro |
| Blended | 100% | 0.96 | |||||
Planning more than one job in Baton Rouge?
Because every project leans on different trades, Baton Rouge's wage level does not move all prices equally. Against the US midpoint, bathroom remodel runs −5% and roof replacement −10%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $17,400 – $29,600 | −6% |
| Bathroom remodel | 45 sq ft | $4,450 – $22,100 | −5% |
| Detached garage | 576 sq ft | $27,000 – $54,200 | −7% |
| Roof replacement | 2,000 sq ft of roof | $5,450 – $11,300 | −10% |
Climate in Baton Rouge: timing your home addition job
We use NOAA's 1991-2020 climate normals for Baton Rouge Ryan Ap (5 miles from the city center). These are 30-year monthly averages, not forecasts.
September through May is the stretch where digging, grading and setting material in the ground runs into the fewest weather problems in Baton Rouge (9 of 12 months). June, July and August have an average daytime high of 90°F or more.
Baton Rouge gets about 62 inches of precipitation in a normal year. The wettest months are January, June and August (6.5 inches in June). Inside the workable window, September and November are the driest, at 4.4 and 3.9 inches. The station averages about 96 days a year at 90°F or above.
Does the season change the price? Probably, but we do not have a sourced seasonal price curve, so the estimator shows a year-round figure and does not adjust by month. When you collect quotes, ask whether scheduling in a slower month gets a better rate.
| Month | Avg high °F | Avg low °F | Precip (in) | For this job |
|---|---|---|---|---|
| Jan | 62 | 42 | 6.4 | Workable |
| Feb | 67 | 45 | 4.4 | Workable |
| Mar | 73 | 51 | 4.5 | Workable |
| Apr | 79 | 57 | 5.1 | Workable |
| May | 86 | 65 | 5.2 | Workable |
| Jun | 91 | 72 | 6.5 | Hot |
| Jul | 92 | 74 | 5.1 | Hot |
| Aug | 92 | 73 | 6.4 | Hot |
| Sep | 89 | 69 | 4.4 | Workable |
| Oct | 81 | 58 | 4.8 | Workable |
| Nov | 71 | 48 | 3.9 | Workable |
| Dec | 64 | 43 | 5.3 | Workable |
How Baton Rouge compares
Of the five closest metros, all are cheaper than Baton Rouge. Hattiesburg is the lowest at about $48,000 (midpoint, 300 sq ft), 120 miles away.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Baton Rouge, LAthis page | $36,100 – $73,100 | $54,600 | |
| Lafayette, LA70 miles | $33,100 – $67,000 | $50,000 | −8% |
| Slidell, LA70 miles | $33,000 – $66,900 | $50,000 | −8% |
| Houma, LA85 miles | $32,800 – $66,500 | $49,700 | −9% |
| Alexandria, LA100 miles | $32,300 – $65,500 | $48,900 | −10% |
| Hattiesburg, MS120 miles | $31,700 – $64,300 | $48,000 | −12% |
| Louisiana (statewide) | $33,700 – $68,300 | $51,000 | −7% |
| United States | $38,000 – $77,000 | $57,500 | +5% |
Across 300 US metros, Baton Rouge comes in at #149 from the top. The priciest is Honolulu, HI at $79,600; the cheapest is Brownsville, TX at $44,300 (midpoints, 300 sq ft). Statewide, Baton Rouge is 7% above the Louisiana figure.
Other Louisiana metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| New Orleans, LA | 445,550 jobs | $33,800 – $68,500 | $51,100 | −6% |
| Lafayette, LA | 179,570 jobs | $33,100 – $67,000 | $50,000 | −8% |
| Shreveport, LA | 162,750 jobs | $32,800 – $66,500 | $49,600 | −9% |
| Lake Charles, LA | 101,690 jobs | $33,100 – $67,100 | $50,100 | −8% |
| Slidell, LA | 98,240 jobs | $33,000 – $66,900 | $50,000 | −8% |
| Monroe, LA | 87,500 jobs | $32,700 – $66,300 | $49,500 | −9% |
Cities with a workforce like Baton Rouge's
Big cities and small ones price differently, so here is Baton Rouge against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Knoxville, TN | 424,600 jobs | $33,600 – $68,100 | $50,800 | −7% |
| Madison, WI | 408,070 jobs | $40,200 – $81,300 | $60,700 | +11% |
| Greenville, SC | 434,900 jobs | $33,400 – $67,700 | $50,600 | −7% |
| Albuquerque, NM | 404,700 jobs | $36,300 – $73,600 | $55,000 | +1% |
Baton Rouge: what basic, standard and premium work costs
Three bands are cut from the same cited range and localized for Baton Rouge wages and prices. They overlap on purpose: a good standard job and a modest premium job can cost the same. The grid below prices the same bands at 3 common sizes.
Basic
$36,100 to $50,900
Bump-out or simple room without plumbing
Standard
$47,200 to $62,000
Standard room addition with HVAC and electrical
Premium
$58,300 to $73,100
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $12,300 – $17,600 | $16,300 – $21,600 | $20,300 – $25,600 |
| 20x20 room (400 sq ft) | $48,000 – $67,500 | $62,700 – $82,200 | $77,300 – $96,900 |
| large suite (600 sq ft) | $71,800 – $101,000 | $93,600 – $122,500 | $115,500 – $144,500 |
Specs and site conditions that change a Baton Rouge bid
Foundation
A foundation, framing, roofing and matching exterior finishes all have to be built before the interior work starts.
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.
Get 3 local quotes
Tell us about the job and we will try to connect you with up to three local contractors for written quotes. It is free and you are under no obligation to hire. Your estimate of $47,200 to $62,000 for Baton Rouge, LA is attached.
Detailed home addition report for Baton Rouge, LA, $9
Multi-page report for Baton Rouge, LA: low, typical and high cost, a line-item breakdown of materials and labor by trade, permit notes, the best months to schedule, a quote comparison sheet, red flags, questions for contractors, checklists and every source. Save your estimate above, preview page 1 free, and unlock the full report for $9 one-time, or get every report with CostLocal Pro.
Home addition in Baton Rouge: your questions
+How much does it cost to build a home addition in Baton Rouge?
For 300 sq ft, expect $36,100 to $73,100 in the Baton Rouge area. A standard-spec job lands at $47,200 to $62,000. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in Baton Rouge?
About $119 to $238 per sq ft for materials and labor, plus $450 to $1,800 for the permit if one is needed. The US range is $125 to $250.
+Is home addition cheaper in Baton Rouge or Lafayette?
Lafayette is 70 miles away. The midpoint for 300 sq ft there is $50,000, which is 8% less than Baton Rouge ($54,600). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Baton Rouge?
About 67% at the midpoint, or $36,600 out of $54,600. Materials are 31% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Baton Rouge?
$48,000 to $96,900. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Baton Rouge?
Often, but rules are set by your city or county building office, so call before you hire. Budget $450 to $1,800 for fees in the Baton Rouge area (our national range of $500 to $2,000 scaled by the local price level).
+Is Baton Rouge expensive for home addition compared with the rest of Louisiana?
Baton Rouge is 7% above the Louisiana statewide estimate ($51,000 at the midpoint). We cover 9 metros in Louisiana; see the state page to compare them.
+What do carpenters earn in Baton Rouge?
The BLS median is $26.75 an hour in the Baton Rouge area, compared with $29.12 nationally. The 25th to 75th percentile range is $23.20 to $29.27.
+What do basic and premium home addition work cost in Baton Rouge?
For 300 sq ft, basic work runs $36,100 to $50,900 and premium work $58,300 to $73,100. Basic means: bump-out or simple room without plumbing. Premium means: large addition with bath or kitchen and a new foundation.
+When is the best time to build a home addition in Baton Rouge?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are September through May. September and November are typically the driest of those months. Local contractors' schedules matter as much as the weather, so book early for the busy months.
Home addition near Baton Rouge
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.