Home addition cost in Oxnard, CA
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $42,400 – $85,900
- Per sq ft
- $139 – $279
- before permit
- Versus US midpoint
- +12%
- US $57,500
- Rank of 300 metros
- #36
- 1 = most expensive
If you want to build a home addition in Oxnard, plan on $42,400 to $85,900 for 300 sq ft, all in. Per sq ft, that is $139 to $279 for materials and labor, with the permit on top. The local midpoint runs 12% higher than the national one. Carpenters earn a median of $35.61 an hour in the Oxnard area, 22% above the US median of $29.12.
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Estimated cost for 300 sq ft in Oxnard, CA, standard level
$55,400 to $72,800
About $181 to $237 per sq ft before permits. Labor is about 68% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $16,400 | $21,500 |
| Labor | $38,000 | $49,700 |
| Permits and fees | $1,050 | $1,700 |
| Total | $55,400 | $72,800 |
Cost breakdown for 300 sq ft in Oxnard, CA
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $12,600 | $18,900 | $25,200 | 30% |
| Labor | $29,200 | $43,800 | $58,400 | 68% |
| Permits and fees | $550 | $1,400 | $2,200 | 2% |
| Total | $42,400 | $64,100 | $85,900 | 100% |
What is behind the Oxnard number
Labor is 68% 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 Oxnard the blended ratio comes out at 1.15.
On the materials line, the BEA goods price index for the Oxnard metro is 105.2 (US = 100). The midpoint materials bill for 300 sq ft comes to $18,900, compared with $18,000 at national prices. Permit and inspection fees are scaled by the broader index (110.5) and land at $550 to $2,200.
Climate in Oxnard: timing your home addition job
We use NOAA's 1991-2020 climate normals for Oxnard Ventura Co Ap (in the city). These are 30-year monthly averages, not forecasts.
Weather is not a serious constraint for digging, grading and setting material in the ground in Oxnard: no month in the averages is cold enough (an average overnight low at or below freezing (32°F)) or hot enough (an average daytime high of 90°F or more) to rule it out, so the workable window is all year.
Oxnard gets about 13 inches of precipitation in a normal year. The wettest months are January, February and March (3.3 inches in February). The station averages about 2 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 | 66 | 46 | 2.9 | Workable |
| Feb | 65 | 48 | 3.3 | Workable |
| Mar | 66 | 49 | 2.3 | Workable |
| Apr | 67 | 51 | 0.7 | Workable |
| May | 68 | 54 | 0.3 | Workable |
| Jun | 70 | 58 | 0.1 | Workable |
| Jul | 73 | 61 | 0.0 | Workable |
| Aug | 74 | 61 | 0.0 | Workable |
| Sep | 74 | 60 | 0.1 | Workable |
| Oct | 74 | 55 | 0.5 | Workable |
| Nov | 70 | 50 | 0.7 | Workable |
| Dec | 66 | 47 | 2.1 | Workable |
Home addition: what moves the price in Oxnard
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).
Oxnard against nearby metros and the rest of California
Contractors rarely work more than an hour or two from home, so the neighboring metros set a rough ceiling and floor for your quotes. Midpoints for 300 sq ft range from $59,000 to $66,000 across Oxnard and its five closest metros.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Oxnard, CAthis page | $42,400 – $85,900 | $64,100 | |
| Santa Maria, CA55 miles | $42,700 – $86,500 | $64,600 | +1% |
| Los Angeles, CA55 miles | $43,600 – $88,400 | $66,000 | +3% |
| Bakersfield, CA70 miles | $41,100 – $83,200 | $62,200 | −3% |
| San Luis Obispo, CA105 miles | $43,600 – $88,200 | $65,900 | +3% |
| Visalia, CA130 miles | $39,000 – $79,000 | $59,000 | −8% |
| California (statewide) | $43,800 – $88,800 | $66,300 | +3% |
| United States | $38,000 – $77,000 | $57,500 | −10% |
Across 300 US metros, Oxnard comes in at #36 from the top. The priciest is Honolulu, HI at $79,600; the cheapest is Brownsville, TX at $44,300 (midpoints, 300 sq ft). Statewide, Oxnard is 3% below the California figure.
Other California metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Los Angeles, CA | 6,271,560 jobs | $43,600 – $88,400 | $66,000 | +3% |
| San Francisco, CA | 2,373,920 jobs | $49,600 – $100,500 | $75,000 | +17% |
| Riverside, CA | 1,716,760 jobs | $41,300 – $83,700 | $62,500 | −3% |
| San Diego, CA | 1,538,060 jobs | $44,000 – $89,200 | $66,600 | +4% |
| San Jose, CA | 1,134,970 jobs | $48,400 – $97,800 | $73,100 | +14% |
| Sacramento, CA | 1,080,590 jobs | $42,800 – $86,700 | $64,700 | +1% |
Cities with a workforce like Oxnard's
Big cities and small ones price differently, so here is Oxnard against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Harrisburg, PA | 335,010 jobs | $38,300 – $77,500 | $57,900 | −10% |
| Akron, OH | 319,560 jobs | $38,500 – $77,900 | $58,200 | −9% |
| Bakersfield, CA | 338,230 jobs | $41,100 – $83,200 | $62,200 | −3% |
| Colorado Springs, CO | 316,060 jobs | $36,400 – $73,700 | $55,100 | −14% |
Related projects, priced for Oxnard
Because every project leans on different trades, Oxnard's wage level does not move all prices equally. Against the US midpoint, detached garage runs +12% and bathroom remodel +6%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $19,700 – $33,600 | +7% |
| Bathroom remodel | 45 sq ft | $4,950 – $24,600 | +6% |
| Detached garage | 576 sq ft | $32,400 – $65,000 | +12% |
| Roof replacement | 2,000 sq ft of roof | $6,850 – $13,900 | +11% |
Pick a size, pick a tier: home addition pricing in Oxnard
Three bands are cut from the same cited range and localized for Oxnard 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
$42,400 to $59,800
Bump-out or simple room without plumbing
Standard
$55,400 to $72,800
Standard room addition with HVAC and electrical
Premium
$68,500 to $85,900
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $14,500 – $20,700 | $19,200 – $25,400 | $23,900 – $30,100 |
| 20x20 room (400 sq ft) | $56,300 – $79,300 | $73,600 – $96,500 | $90,800 – $114,000 |
| large suite (600 sq ft) | $84,200 – $118,500 | $110,000 – $144,000 | $135,500 – $169,500 |
Oxnard 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 Oxnard is 1.15 times the national level.
For carpenters (47-2031, weighted 50%) the local median is $35.61 an hour, which is 22% above the national $29.12. The middle half of them earn between $29.47 and $40.40 an hour. BLS counts 2,050 of them working in the area, 63.3 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 $30.81 an hour, which is 12% above the national $27.41. The middle half of them earn between $26.24 and $45.99 an hour. BLS counts 580 of them working in the area, 17.9 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 $31.17 an hour, in line with the US median of $30.38. The middle half of them earn between $28.21 and $41.06 an hour. About 1,160 work in the metro. That is 35.8 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 $29.95 an hour, which is in line with the national $30.67. The middle half of them earn between $26.64 and $39.26 an hour. BLS counts 1,230 of them working in the area, 38.0 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 $30.65 an hour, 8% above the US median of $28.33. The middle half of them earn between $28.02 and $37.44 an hour. About 650 work in the metro. That is 20.1 per 10,000 jobs, compared with 5.3 nationally, which suggests plenty of local crews to bid.
For roofers (47-2181, weighted 10%) the local median is $30.21 an hour, which is 13% above the national $26.65. The middle half of them earn between $28.37 and $35.66 an hour. BLS counts 430 of them working in the area, 13.3 for every 10,000 jobs (US: 8.7), so the local bench is deeper than average.
Quotes come from real crews, not medians. If the carpenters on your job are paid at the 75th percentile ($40.40 an hour) instead of the median, the labor line grows by about $3,150. At the 25th percentile ($29.47) it shrinks by about $4,050. The total moves by 4.9% or 6.3%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 323,890 jobs in the Oxnard-Thousand Oaks-Ventura area. That makes it the 79th largest of the 300 metros we cover, with 0.21% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $29.47 | $35.61 | $40.40 | $29.12 | 1.22 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $26.24 | $30.81 | $45.99 | $27.41 | 1.12 | metro |
| Electricians (47-2111) | 10% | $28.21 | $31.17 | $41.06 | $30.38 | 1.03 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $26.64 | $29.95 | $39.26 | $30.67 | 0.98 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $28.02 | $30.65 | $37.44 | $28.33 | 1.08 | metro |
| Roofers (47-2181) | 10% | $28.37 | $30.21 | $35.66 | $26.65 | 1.13 | metro |
| Blended | 100% | 1.15 | |||||
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Detailed home addition report for Oxnard, CA, $9
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Home addition in Oxnard: your questions
+How much does it cost to build a home addition in Oxnard?
For 300 sq ft, expect $42,400 to $85,900 in the Oxnard area. A standard-spec job lands at $55,400 to $72,800. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in Oxnard?
About $139 to $279 per sq ft for materials and labor, plus $550 to $2,200 for the permit if one is needed. The US range is $125 to $250.
+Is home addition cheaper in Oxnard or Santa Maria?
Santa Maria is 55 miles away. The midpoint for 300 sq ft there is $64,600, which is 1% more than Oxnard ($64,100). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Oxnard?
About 68% at the midpoint, or $43,800 out of $64,100. Materials are 30% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Oxnard?
$56,300 to $114,000. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Oxnard?
Often, but rules are set by your city or county building office, so call before you hire. Budget $550 to $2,200 for fees in the Oxnard area (our national range of $500 to $2,000 scaled by the local price level).
+Is Oxnard expensive for home addition compared with the rest of California?
Oxnard is 3% below the California statewide estimate ($66,300 at the midpoint). We cover 23 metros in California; see the state page to compare them.
+What do carpenters earn in Oxnard?
The BLS median is $35.61 an hour in the Oxnard area, compared with $29.12 nationally. The 25th to 75th percentile range is $29.47 to $40.40.
+What do basic and premium home addition work cost in Oxnard?
For 300 sq ft, basic work runs $42,400 to $59,800 and premium work $68,500 to $85,900. Basic means: bump-out or simple room without plumbing. Premium means: large addition with bath or kitchen and a new foundation.
+Is there a bad season to build a home addition in Oxnard?
Not from a temperature point of view. NOAA's 1991-2020 normals show no month with a freezing-level overnight low or a 90°F-plus average high, so timing is mostly about contractor availability and rain.
Home addition near Oxnard
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.