Home addition cost in San Antonio, TX
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $32,800 – $66,500
- Per sq ft
- $108 – $215
- before permit
- Versus US midpoint
- −14%
- US $57,500
- Rank of 300 metros
- #255
- 1 = most expensive
A home addition in San Antonio, TX usually costs $32,800 to $66,500 for 300 sq ft. That works out to about $108 to $215 per sq ft before permits. Compared with the national midpoint that is $7,850 less. Carpenters earn a median of $23.51 an hour in the San Antonio area, 19% below the US median of $29.12.
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Estimated cost for 300 sq ft in San Antonio, TX, standard level
$42,900 to $56,400
About $140 to $183 per sq ft before permits. Labor is about 64% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $14,600 | $19,100 |
| Labor | $27,400 | $35,800 |
| Permits and fees | $900 | $1,450 |
| Total | $42,900 | $56,400 |
Cost breakdown for 300 sq ft in San Antonio, TX
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,300 | $16,900 | $22,500 | 34% |
| Labor | $21,000 | $31,600 | $42,100 | 64% |
| Permits and fees | $470 | $1,200 | $1,900 | 2% |
| Total | $32,800 | $49,600 | $66,500 | 100% |
What is behind the San Antonio number
Labor is 64% 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 San Antonio the blended ratio comes out at 0.83.
Materials are scaled with BEA's regional price parity for goods. San Antonio is at 93.8 against 100 for the US, so a materials line of $18,000 nationally becomes $16,900 here (midpoint, 300 sq ft). Permits follow the all-items index of 94.7: $470 to $1,900.
San Antonio against nearby metros and the rest of Texas
Of the five closest metros, 4 are cheaper than San Antonio. Laredo is the lowest at about $46,100 (midpoint, 300 sq ft), 125 miles away.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| San Antonio, TXthis page | $32,800 – $66,500 | $49,600 | |
| Austin, TX80 miles | $33,800 – $68,700 | $51,300 | +3% |
| Laredo, TX125 miles | $30,400 – $61,800 | $46,100 | −7% |
| Corpus Christi, TX130 miles | $32,400 – $65,800 | $49,100 | −1% |
| Killeen, TX130 miles | $31,900 – $64,800 | $48,400 | −3% |
| College Station, TX155 miles | $31,600 – $64,200 | $47,900 | −3% |
| Texas (statewide) | $33,600 – $68,200 | $50,900 | +3% |
| United States | $38,000 – $77,000 | $57,500 | +16% |
Out of the 300 metros we cover, San Antonio ranks #255 for the cost of this job (#1 is the most expensive). Statewide, San Antonio is 2% below the Texas figure.
Elsewhere in Texas
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Dallas, TX | 4,049,800 jobs | $34,400 – $69,800 | $52,100 | +5% |
| Houston, TX | 3,289,720 jobs | $34,100 – $69,200 | $51,600 | +4% |
| Austin, TX | 1,293,690 jobs | $33,800 – $68,700 | $51,300 | +3% |
| El Paso, TX | 339,120 jobs | $30,200 – $61,200 | $45,700 | −8% |
| McAllen, TX | 296,700 jobs | $30,100 – $61,000 | $45,500 | −8% |
| Corpus Christi, TX | 192,580 jobs | $32,400 – $65,800 | $49,100 | −1% |
Metros of a similar size
Big cities and small ones price differently, so here is San Antonio against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| San Jose, CA | 1,134,970 jobs | $48,400 – $97,800 | $73,100 | +47% |
| Pittsburgh, PA | 1,114,490 jobs | $38,900 – $78,700 | $58,800 | +19% |
| Las Vegas, NV | 1,136,960 jobs | $37,700 – $76,400 | $57,100 | +15% |
| Columbus, OH | 1,105,580 jobs | $38,900 – $78,700 | $58,800 | +18% |
What local crews earn in San Antonio
The labor line is built from BLS wage data, one trade at a time. This job draws on 6 trades. We compare each trade's local median with the US median, weight the ratios by how much of the job each trade does, and apply the blend to the national labor cost. For San Antonio the blend is 0.83.
Carpenters (47-2031), 50% of the weighting: a median of $23.51 an hour, 19% below the US median of $29.12. The middle half of them earn between $21.91 and $26.49 an hour. About 2,240 work in the metro. That is 19.9 per 10,000 jobs, compared with 43.1 nationally, so expect fewer local crews to bid.
Cement masons and concrete finishers (47-2051), 10% of the weighting: a median of $22.60 an hour, 18% below the US median of $27.41. The middle half of them earn between $20.84 and $25.95 an hour. About 1,960 work in the metro. That is 17.4 per 10,000 jobs, compared with 13.3 nationally, which suggests plenty of local crews to bid.
For electricians (47-2111, weighted 10%) the local median is $27.41 an hour, which is 10% below the national $30.38. The middle half of them earn between $21.78 and $31.61 an hour. BLS counts 6,660 of them working in the area, 59.1 for every 10,000 jobs (US: 48.7), so the local bench is deeper than average.
Plumbers, pipefitters and steamfitters (47-2152), 10% of the weighting: a median of $27.97 an hour, 9% below the US median of $30.67. The middle half of them earn between $22.23 and $32.94 an hour. About 3,190 work in the metro. That is 28.3 per 10,000 jobs, compared with 30.0 nationally, so the supply of crews looks typical.
For drywall and ceiling tile installers (47-2081, weighted 10%) the local median is $22.38 an hour, which is 21% below the national $28.33. The middle half of them earn between $19.09 and $27.55 an hour. BLS counts 290 of them working in the area, 2.6 for every 10,000 jobs (US: 5.3), so the local bench is thinner than average.
Roofers (47-2181), 10% of the weighting: a median of $21.02 an hour, 21% below the US median of $26.65. The middle half of them earn between $17.64 and $23.70 an hour. About 350 work in the metro. That is 3.1 per 10,000 jobs, compared with 8.7 nationally, so expect fewer local crews to bid.
A quick sensitivity check: moving the lead trade (carpenters) from the median to the 75th percentile wage adds about $1,950 to the midpoint estimate; the 25th percentile takes off about $1,050. That is a swing of roughly 2.1% to 3.9% of the total, which is useful for judging whether a bid reflects wages or something else, such as scope or margin.
San Antonio-New Braunfels has 1,126,880 jobs in total (BLS, May 2025), ranking 28th by size among the 300 metros on this site.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $21.91 | $23.51 | $26.49 | $29.12 | 0.81 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $20.84 | $22.60 | $25.95 | $27.41 | 0.82 | metro |
| Electricians (47-2111) | 10% | $21.78 | $27.41 | $31.61 | $30.38 | 0.90 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $22.23 | $27.97 | $32.94 | $30.67 | 0.91 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $19.09 | $22.38 | $27.55 | $28.33 | 0.79 | metro |
| Roofers (47-2181) | 10% | $17.64 | $21.02 | $23.70 | $26.65 | 0.79 | metro |
| Blended | 100% | 0.83 | |||||
San Antonio weather and the home addition calendar
Climate numbers on this page come from NOAA's 1991-2020 U.S. Climate Normals at the nearest suitable station, San Antonio Intl Ap (5 miles from the city center). They are 30-year averages, so any one year can run hotter, colder or wetter.
For digging, grading and setting material in the ground, the comfortable months in San Antonio are October through May: 8 of 12. Outside them, June, July, August and September have an average daytime high of 90°F or more.
San Antonio gets about 32 inches of precipitation in a normal year. The wettest months are May, September and October (4.4 inches in May). Inside the workable window, January and February are the driest, at 2.0 and 1.7 inches. The station averages about 122 days a year at 90°F or above.
We do not adjust the estimate by month, because we have no reliable published data on seasonal pricing. It is still worth asking contractors whether an off-peak start date changes their bid.
| Month | Avg high °F | Avg low °F | Precip (in) | For this job |
|---|---|---|---|---|
| Jan | 63 | 41 | 2.0 | Workable |
| Feb | 68 | 45 | 1.7 | Workable |
| Mar | 74 | 52 | 2.3 | Workable |
| Apr | 80 | 58 | 2.4 | Workable |
| May | 87 | 66 | 4.4 | Workable |
| Jun | 92 | 73 | 3.3 | Hot |
| Jul | 95 | 75 | 2.4 | Hot |
| Aug | 96 | 75 | 2.1 | Hot |
| Sep | 90 | 70 | 3.9 | Hot |
| Oct | 82 | 60 | 3.8 | Workable |
| Nov | 72 | 50 | 2.1 | Workable |
| Dec | 65 | 42 | 2.0 | Workable |
Specs and site conditions that change a San Antonio bid
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.
What nearby projects cost in San Antonio
Jobs that often go together with home addition are priced below at their usual sizes, using the same San Antonio wage and price inputs. Compared with national midpoints, kitchen remodel comes out highest (−8%) and roof replacement lowest (−15%); the gap comes from the trades each job uses.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $17,000 – $28,900 | −8% |
| Bathroom remodel | 45 sq ft | $4,200 – $20,700 | −11% |
| Detached garage | 576 sq ft | $25,500 – $51,200 | −12% |
| Roof replacement | 2,000 sq ft of roof | $5,100 – $10,700 | −15% |
San Antonio: what basic, standard and premium work costs
The cited range is split into basic, standard and premium bands, then scaled to San Antonio. Bands overlap, because plenty of standard jobs cost as much as a light premium one. Sizes run from bump-out (100 sq ft) to large suite (600 sq ft).
Basic
$32,800 to $46,300
Bump-out or simple room without plumbing
Standard
$42,900 to $56,400
Standard room addition with HVAC and electrical
Premium
$53,000 to $66,500
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $11,200 – $16,100 | $14,900 – $19,800 | $18,600 – $23,400 |
| 20x20 room (400 sq ft) | $43,500 – $61,300 | $56,900 – $74,700 | $70,200 – $88,000 |
| large suite (600 sq ft) | $65,100 – $91,500 | $84,900 – $111,500 | $104,500 – $131,000 |
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Home addition in San Antonio: your questions
+How much does it cost to build a home addition in San Antonio?
For 300 sq ft, expect $32,800 to $66,500 in the San Antonio area. A standard-spec job lands at $42,900 to $56,400. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in San Antonio?
About $108 to $215 per sq ft for materials and labor, plus $470 to $1,900 for the permit if one is needed. The US range is $125 to $250.
+Is home addition cheaper in San Antonio or Austin?
Austin is 80 miles away. The midpoint for 300 sq ft there is $51,300, which is 3% more than San Antonio ($49,600). Wage and materials indexes both feed that gap.
+How much of the bill is labor in San Antonio?
About 64% at the midpoint, or $31,600 out of $49,600. Materials are 34% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in San Antonio?
$43,500 to $88,000. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in San Antonio?
Often, but rules are set by your city or county building office, so call before you hire. Budget $470 to $1,900 for fees in the San Antonio area (our national range of $500 to $2,000 scaled by the local price level).
+Is San Antonio expensive for home addition compared with the rest of Texas?
San Antonio is 2% below 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 San Antonio?
The BLS median is $23.51 an hour in the San Antonio area, compared with $29.12 nationally. The 25th to 75th percentile range is $21.91 to $26.49.
+What do basic and premium home addition work cost in San Antonio?
For 300 sq ft, basic work runs $32,800 to $46,300 and premium work $53,000 to $66,500. 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 San Antonio?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are October through May. January and February 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 San Antonio
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.