Home addition cost in Austin, TX
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $33,800 – $68,700
- Per sq ft
- $111 – $222
- before permit
- Versus US midpoint
- −11%
- US $57,500
- Rank of 300 metros
- #206
- 1 = most expensive
Austin homeowners pay roughly $33,800 to $68,700 to build a home addition at 300 sq ft, or $111 to $222 per sq ft (permit not included). Against the US midpoint, Austin is 11% lower. Carpenters earn a median of $24.16 an hour in the Austin area, 17% below the US median of $29.12.
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Estimated cost for 300 sq ft in Austin, TX, standard level
$44,300 to $58,200
About $145 to $189 per sq ft before permits. Labor is about 65% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $14,600 | $19,100 |
| Labor | $28,700 | $37,600 |
| Permits and fees | $930 | $1,500 |
| Total | $44,300 | $58,200 |
Cost breakdown for 300 sq ft in Austin, TX
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,300 | $16,900 | $22,500 | 33% |
| Labor | $22,100 | $33,100 | $44,200 | 65% |
| Permits and fees | $490 | $1,250 | $1,950 | 2% |
| Total | $33,800 | $51,300 | $68,700 | 100% |
What is behind the Austin number
The wage side of the estimate leans on carpenters, who do 50% of the hours on a typical job. Their local median is $24.16 an hour. Add the other trades involved and the blended wage index for Austin is 0.87 (US = 1.00), which puts labor at 65% of the total.
On the materials line, the BEA goods price index for the Austin metro is 93.8 (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 (98.1) and land at $490 to $1,950.
Specs and site conditions that change a Austin bid
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.
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).
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 Austin is 0.87 times the national level.
For carpenters (47-2031, weighted 50%) the local median is $24.16 an hour, which is 17% below the national $29.12. The middle half of them earn between $23.05 and $28.01 an hour. BLS counts 2,540 of them working in the area, 19.6 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 $23.76 an hour, which is 13% below the national $27.41. The middle half of them earn between $21.66 and $27.82 an hour. BLS counts 2,650 of them working in the area, 20.5 for every 10,000 jobs (US: 13.3), so the local bench is deeper than average.
Electricians (47-2111), 10% of the weighting: a median of $29.03 an hour, 4% below the US median of $30.38. The middle half of them earn between $22.97 and $35.25 an hour. About 7,340 work in the metro. That is 56.7 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 $30.20 an hour, which is in line with the national $30.67. The middle half of them earn between $23.44 and $38.32 an hour. BLS counts 5,260 of them working in the area, 40.7 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 $24.28 an hour, 14% below the US median of $28.33. The middle half of them earn between $22.25 and $29.58 an hour. About 710 work in the metro. That is 5.5 per 10,000 jobs, compared with 5.3 nationally, so the supply of crews looks typical.
For roofers (47-2181, weighted 10%) the local median is $22.76 an hour, which is 15% below the national $26.65. The middle half of them earn between $19.14 and $27.31 an hour. BLS counts 480 of them working in the area, 3.7 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 ($28.01 an hour) instead of the median, the labor line grows by about $2,550. At the 25th percentile ($23.05) it shrinks by about $730. The total moves by 4.9% or 1.4%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 1,293,690 jobs in the Austin-Round Rock-San Marcos area. That makes it the 24th largest of the 300 metros we cover, with 0.83% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $23.05 | $24.16 | $28.01 | $29.12 | 0.83 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $21.66 | $23.76 | $27.82 | $27.41 | 0.87 | metro |
| Electricians (47-2111) | 10% | $22.97 | $29.03 | $35.25 | $30.38 | 0.96 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $23.44 | $30.20 | $38.32 | $30.67 | 0.98 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $22.25 | $24.28 | $29.58 | $28.33 | 0.86 | metro |
| Roofers (47-2181) | 10% | $19.14 | $22.76 | $27.31 | $26.65 | 0.85 | metro |
| Blended | 100% | 0.87 | |||||
Cost by quality level and size in Austin
Three bands are cut from the same cited range and localized for Austin 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
$33,800 to $47,800
Bump-out or simple room without plumbing
Standard
$44,300 to $58,200
Standard room addition with HVAC and electrical
Premium
$54,700 to $68,700
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $11,600 – $16,600 | $15,400 – $20,400 | $19,200 – $24,200 |
| 20x20 room (400 sq ft) | $45,000 – $63,300 | $58,700 – $77,100 | $72,500 – $90,900 |
| large suite (600 sq ft) | $67,200 – $94,500 | $87,600 – $115,000 | $108,000 – $135,500 |
Austin against nearby metros and the rest of Texas
Of the five closest metros, 4 are cheaper than Austin. College Station is the lowest at about $47,900 (midpoint, 300 sq ft), 75 miles away.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Austin, TXthis page | $33,800 – $68,700 | $51,300 | |
| Killeen, TX65 miles | $31,900 – $64,800 | $48,400 | −6% |
| College Station, TX75 miles | $31,600 – $64,200 | $47,900 | −6% |
| San Antonio, TX80 miles | $32,800 – $66,500 | $49,600 | −3% |
| Waco, TX95 miles | $32,300 – $65,600 | $48,900 | −5% |
| Houston, TX140 miles | $34,100 – $69,200 | $51,600 | +1% |
| Texas (statewide) | $33,600 – $68,200 | $50,900 | −1% |
| United States | $38,000 – $77,000 | $57,500 | +12% |
Across 300 US metros, Austin comes in at #206 from the top. The priciest is Honolulu, HI at $79,600; the cheapest is Brownsville, TX at $44,300 (midpoints, 300 sq ft). Statewide, Austin is 1% above the Texas figure.
Other Texas metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Dallas, TX | 4,049,800 jobs | $34,400 – $69,800 | $52,100 | +2% |
| Houston, TX | 3,289,720 jobs | $34,100 – $69,200 | $51,600 | +1% |
| San Antonio, TX | 1,126,880 jobs | $32,800 – $66,500 | $49,600 | −3% |
| El Paso, TX | 339,120 jobs | $30,200 – $61,200 | $45,700 | −11% |
| McAllen, TX | 296,700 jobs | $30,100 – $61,000 | $45,500 | −11% |
| Corpus Christi, TX | 192,580 jobs | $32,400 – $65,800 | $49,100 | −4% |
Cities with a workforce like Austin's
Big cities and small ones price differently, so here is Austin against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| St. Louis, MO | 1,341,320 jobs | $41,800 – $84,600 | $63,200 | +23% |
| Portland, OR | 1,208,410 jobs | $46,600 – $94,300 | $70,500 | +38% |
| Baltimore, MD | 1,356,680 jobs | $38,100 – $77,300 | $57,700 | +13% |
| Las Vegas, NV | 1,136,960 jobs | $37,700 – $76,400 | $57,100 | +11% |
Planning more than one job in Austin?
Because every project leans on different trades, Austin's wage level does not move all prices equally. Against the US midpoint, kitchen remodel runs −7% and roof replacement −10%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $17,200 – $29,300 | −7% |
| Bathroom remodel | 45 sq ft | $4,300 – $21,400 | −8% |
| Detached garage | 576 sq ft | $26,200 – $52,600 | −10% |
| Roof replacement | 2,000 sq ft of roof | $5,400 – $11,200 | −10% |
When to schedule home addition in Austin
We use NOAA's 1991-2020 climate normals for Austin-Camp Mabry (5 miles from the city center). These are 30-year monthly averages, not forecasts.
October through May is the stretch where digging, grading and setting material in the ground runs into the fewest weather problems in Austin (8 of 12 months). June, July, August and September have an average daytime high of 90°F or more.
Austin gets about 36 inches of precipitation in a normal year. The wettest months are May, June and October (5.0 inches in May). Inside the workable window, February and April are the driest, at 1.9 and 2.4 inches. The station averages about 123 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 | 63 | 42 | 2.6 | Workable |
| Feb | 67 | 46 | 1.9 | Workable |
| Mar | 73 | 52 | 2.9 | Workable |
| Apr | 80 | 59 | 2.4 | Workable |
| May | 87 | 67 | 5.0 | Workable |
| Jun | 93 | 73 | 3.7 | Hot |
| Jul | 97 | 75 | 2.0 | Hot |
| Aug | 98 | 75 | 2.7 | Hot |
| Sep | 91 | 70 | 3.5 | Hot |
| Oct | 83 | 61 | 3.9 | Workable |
| Nov | 72 | 51 | 2.9 | Workable |
| Dec | 64 | 43 | 2.7 | Workable |
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 $44,300 to $58,200 for Austin, TX is attached.
A detailed PDF report of this estimate, $9
The report lays out the home addition numbers for Austin, TX line by line, with the local wage and price inputs, permit and timing notes, a quote comparison sheet and the full method. 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 Austin: your questions
+How much does it cost to build a home addition in Austin?
For 300 sq ft, expect $33,800 to $68,700 in the Austin area. A standard-spec job lands at $44,300 to $58,200. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in Austin?
About $111 to $222 per sq ft for materials and labor, plus $490 to $1,950 for the permit if one is needed. The US range is $125 to $250.
+Is home addition cheaper in Austin or Killeen?
Killeen is 65 miles away. The midpoint for 300 sq ft there is $48,400, which is 6% less than Austin ($51,300). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Austin?
About 65% at the midpoint, or $33,100 out of $51,300. Materials are 33% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Austin?
$45,000 to $90,900. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Austin?
Often, but rules are set by your city or county building office, so call before you hire. Budget $490 to $1,950 for fees in the Austin area (our national range of $500 to $2,000 scaled by the local price level).
+Is Austin expensive for home addition compared with the rest of Texas?
Austin is 1% above the Texas statewide estimate ($50,900 at the midpoint). We cover 21 metros in Texas; see the state page to compare them.
+What do carpenters earn in Austin?
The BLS median is $24.16 an hour in the Austin area, compared with $29.12 nationally. The 25th to 75th percentile range is $23.05 to $28.01.
+What do basic and premium home addition work cost in Austin?
For 300 sq ft, basic work runs $33,800 to $47,800 and premium work $54,700 to $68,700. 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 Austin?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are October through May. February and April 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 Austin
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.