Home addition cost in Lafayette, LA
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $33,100 – $67,000
- Per sq ft
- $109 – $218
- before permit
- Versus US midpoint
- −13%
- US $57,500
- Rank of 300 metros
- #240
- 1 = most expensive
Lafayette homeowners pay roughly $33,100 to $67,000 to build a home addition at 300 sq ft, or $109 to $218 per sq ft (permit not included). Against the US midpoint, Lafayette is 13% lower. Carpenters earn a median of $22.81 an hour in the Lafayette area, 22% below the US median of $29.12.
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Estimated cost for 300 sq ft in Lafayette, LA, standard level
$43,200 to $56,800
About $141 to $185 per sq ft before permits. Labor is about 64% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $14,600 | $19,100 |
| Labor | $27,800 | $36,400 |
| Permits and fees | $830 | $1,350 |
| Total | $43,200 | $56,800 |
Cost breakdown for 300 sq ft in Lafayette, LA
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,200 | $16,900 | $22,500 | 34% |
| Labor | $21,400 | $32,100 | $42,800 | 64% |
| Permits and fees | $440 | $1,100 | $1,750 | 2% |
| Total | $33,100 | $50,000 | $67,000 | 100% |
Where the Lafayette price comes from
The wage side of the estimate leans on carpenters, who do 50% of the hours on a typical job. Their local median is $22.81 an hour. Add the other trades involved and the blended wage index for Lafayette is 0.84 (US = 1.00), which puts labor at 64% of the total.
On the materials line, the BEA goods price index for the Lafayette 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 (87.2) and land at $440 to $1,750.
Data note: 10% of the labor weighting for this project uses a statewide median because BLS has no published metro figure for that trade in Lafayette. The wage table below marks each row.
When to schedule home addition in Lafayette
We use NOAA's 1991-2020 climate normals for Lafayette Rgnl 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 Lafayette (9 of 12 months). June, July and August have an average daytime high of 90°F or more.
Lafayette gets about 63 inches of precipitation in a normal year. The wettest months are June, July and August (7.1 inches in June). Inside the workable window, February and March are the driest, at 4.1 and 3.7 inches. The station averages about 91 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 | 44 | 5.9 | Workable |
| Feb | 66 | 47 | 4.1 | Workable |
| Mar | 73 | 53 | 3.7 | Workable |
| Apr | 79 | 59 | 4.9 | Workable |
| May | 86 | 67 | 5.4 | Workable |
| Jun | 90 | 73 | 7.1 | Hot |
| Jul | 92 | 75 | 6.3 | Hot |
| Aug | 92 | 75 | 6.3 | Hot |
| Sep | 89 | 70 | 5.0 | Workable |
| Oct | 81 | 60 | 4.8 | Workable |
| Nov | 72 | 50 | 4.4 | Workable |
| Dec | 64 | 45 | 5.0 | Workable |
Lafayette: what basic, standard and premium work costs
Three bands are cut from the same cited range and localized for Lafayette 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
$33,100 to $46,600
Bump-out or simple room without plumbing
Standard
$43,200 to $56,800
Standard room addition with HVAC and electrical
Premium
$53,400 to $67,000
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $11,300 – $16,200 | $15,000 – $19,800 | $18,600 – $23,500 |
| 20x20 room (400 sq ft) | $43,900 – $61,900 | $57,400 – $75,300 | $70,800 – $88,700 |
| large suite (600 sq ft) | $65,700 – $92,300 | $85,700 – $112,500 | $105,500 – $132,000 |
Lafayette against nearby metros and the rest of Louisiana
Of the five closest metros, 2 are cheaper than Lafayette. Alexandria is the lowest at about $48,900 (midpoint, 300 sq ft), 95 miles away.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Lafayette, LAthis page | $33,100 – $67,000 | $50,000 | |
| Lake Charles, LA65 miles | $33,100 – $67,100 | $50,100 | level |
| Baton Rouge, LA70 miles | $36,100 – $73,100 | $54,600 | +9% |
| Houma, LA90 miles | $32,800 – $66,500 | $49,700 | −1% |
| Alexandria, LA95 miles | $32,300 – $65,500 | $48,900 | −2% |
| Beaumont, TX125 miles | $35,300 – $71,400 | $53,400 | +7% |
| Louisiana (statewide) | $33,700 – $68,300 | $51,000 | +2% |
| United States | $38,000 – $77,000 | $57,500 | +15% |
Across 300 US metros, Lafayette comes in at #240 from the top. The priciest is Honolulu, HI at $79,600; the cheapest is Brownsville, TX at $44,300 (midpoints, 300 sq ft). Statewide, Lafayette is 2% below the Louisiana figure.
Other Louisiana metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| New Orleans, LA | 445,550 jobs | $33,800 – $68,500 | $51,100 | +2% |
| Baton Rouge, LA | 409,690 jobs | $36,100 – $73,100 | $54,600 | +9% |
| Shreveport, LA | 162,750 jobs | $32,800 – $66,500 | $49,600 | −1% |
| Lake Charles, LA | 101,690 jobs | $33,100 – $67,100 | $50,100 | level |
| Slidell, LA | 98,240 jobs | $33,000 – $66,900 | $50,000 | level |
| Monroe, LA | 87,500 jobs | $32,700 – $66,300 | $49,500 | −1% |
Cities with a workforce like Lafayette's
Big cities and small ones price differently, so here is Lafayette against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Davenport, IA | 180,450 jobs | $38,000 – $77,000 | $57,500 | +15% |
| Sioux Falls, SD | 178,590 jobs | $33,500 – $67,900 | $50,700 | +1% |
| Asheville, NC | 180,620 jobs | $33,700 – $68,400 | $51,100 | +2% |
| Anchorage, AK | 177,050 jobs | $45,800 – $92,600 | $69,200 | +38% |
Home addition: what moves the price in Lafayette
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.
Local wages behind the labor line
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 Lafayette is 0.84 times the national level.
For carpenters (47-2031, weighted 50%) the local median is $22.81 an hour, which is 22% below the national $29.12. The middle half of them earn between $18.55 and $27.69 an hour. BLS counts 580 of them working in the area, 32.3 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 $25.91 an hour, which is 5% below the national $27.41. The middle half of them earn between $20.29 and $30.00 an hour. BLS counts 90 of them working in the area, 5.0 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 $28.76 an hour, 5% below the US median of $30.38. The middle half of them earn between $22.72 and $31.75 an hour. About 730 work in the metro. That is 40.7 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 $27.85 an hour, which is 9% below the national $30.67. The middle half of them earn between $21.73 and $31.63 an hour. BLS counts 680 of them working in the area, 37.9 for every 10,000 jobs (US: 30.0), so the local bench is deeper than average.
Drywall and ceiling tile installers (47-2081) carry 10% of the labor weighting. BLS does not publish this trade for the Lafayette metro, so we used the Louisiana statewide median: $22.80 an hour against $28.33 for the US. The middle half of them earn between $16.01 and $29.20 an hour.
For roofers (47-2181, weighted 10%) the local median is $23.03 an hour, which is 14% below the national $26.65. The middle half of them earn between $18.30 and $27.38 an hour. BLS counts 80 of them working in the area, 4.5 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 ($27.69 an hour) instead of the median, the labor line grows by about $3,200. At the 25th percentile ($18.55) it shrinks by about $2,800. The total moves by 6.4% or 5.6%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 179,570 jobs in the Lafayette area. That makes it the 129th largest of the 300 metros we cover, with 0.12% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $18.55 | $22.81 | $27.69 | $29.12 | 0.78 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $20.29 | $25.91 | $30.00 | $27.41 | 0.95 | metro |
| Electricians (47-2111) | 10% | $22.72 | $28.76 | $31.75 | $30.38 | 0.95 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $21.73 | $27.85 | $31.63 | $30.67 | 0.91 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $16.01 | $22.80 | $29.20 | $28.33 | 0.80 | state |
| Roofers (47-2181) | 10% | $18.30 | $23.03 | $27.38 | $26.65 | 0.86 | metro |
| Blended | 100% | 0.84 | |||||
What nearby projects cost in Lafayette
Because every project leans on different trades, Lafayette's wage level does not move all prices equally. Against the US midpoint, kitchen remodel runs −9% and bathroom remodel −12%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $16,900 – $28,700 | −9% |
| Bathroom remodel | 45 sq ft | $4,100 – $20,400 | −12% |
| Detached garage | 576 sq ft | $25,700 – $51,600 | −11% |
| Roof replacement | 2,000 sq ft of roof | $5,350 – $11,100 | −11% |
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Home addition in Lafayette: your questions
+How much does it cost to build a home addition in Lafayette?
For 300 sq ft, expect $33,100 to $67,000 in the Lafayette area. A standard-spec job lands at $43,200 to $56,800. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in Lafayette?
About $109 to $218 per sq ft for materials and labor, plus $440 to $1,750 for the permit if one is needed. The US range is $125 to $250.
+Is home addition cheaper in Lafayette or Lake Charles?
Lake Charles is 65 miles away. The midpoint for 300 sq ft there is $50,100, which is 0% more than Lafayette ($50,000). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Lafayette?
About 64% at the midpoint, or $32,100 out of $50,000. Materials are 34% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Lafayette?
$43,900 to $88,700. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Lafayette?
Often, but rules are set by your city or county building office, so call before you hire. Budget $440 to $1,750 for fees in the Lafayette area (our national range of $500 to $2,000 scaled by the local price level).
+Is Lafayette expensive for home addition compared with the rest of Louisiana?
Lafayette is 2% below 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 Lafayette?
The BLS median is $22.81 an hour in the Lafayette area, compared with $29.12 nationally. The 25th to 75th percentile range is $18.55 to $27.69.
+What do basic and premium home addition work cost in Lafayette?
For 300 sq ft, basic work runs $33,100 to $46,600 and premium work $53,400 to $67,000. 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 Lafayette?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are September through May. February and March 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 Lafayette
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.