Home addition cost in Montgomery, AL
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $32,500 – $65,800
- Per sq ft
- $107 – $214
- before permit
- Versus US midpoint
- −15%
- US $57,500
- Rank of 300 metros
- #264
- 1 = most expensive
If you want to build a home addition in Montgomery, plan on $32,500 to $65,800 for 300 sq ft, all in. Per sq ft, that is $107 to $214 for materials and labor, with the permit on top. The local midpoint runs 15% lower than the national one. Carpenters earn a median of $22.77 an hour in the Montgomery area, 22% below the US median of $29.12.
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Pick a size, a quality level and where you live. Prices update as you type.
Estimated cost for 300 sq ft in Montgomery, AL, standard level
$42,500 to $55,800
About $139 to $181 per sq ft before permits. Labor is about 62% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $15,000 | $19,700 |
| Labor | $26,600 | $34,800 |
| Permits and fees | $850 | $1,400 |
| Total | $42,500 | $55,800 |
Cost breakdown for 300 sq ft in Montgomery, AL
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,600 | $17,400 | $23,100 | 35% |
| Labor | $20,500 | $30,700 | $40,900 | 62% |
| Permits and fees | $450 | $1,100 | $1,800 | 2% |
| Total | $32,500 | $49,200 | $65,800 | 100% |
Where the Montgomery price comes from
Labor is 62% 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 Montgomery the blended ratio comes out at 0.80.
On the materials line, the BEA goods price index for the Montgomery metro is 96.4 (US = 100). The midpoint materials bill for 300 sq ft comes to $17,400, compared with $18,000 at national prices. Permit and inspection fees are scaled by the broader index (89.7) and land at $450 to $1,800.
Data note: 20% of the labor weighting for this project uses a statewide median because BLS has no published metro figure for that trade in Montgomery. The wage table below marks each row.
Pick a size, pick a tier: home addition pricing in Montgomery
Three bands are cut from the same cited range and localized for Montgomery 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
$32,500 to $45,800
Bump-out or simple room without plumbing
Standard
$42,500 to $55,800
Standard room addition with HVAC and electrical
Premium
$52,500 to $65,800
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $11,100 – $15,900 | $14,700 – $19,500 | $18,300 – $23,100 |
| 20x20 room (400 sq ft) | $43,100 – $60,800 | $56,400 – $74,000 | $69,600 – $87,200 |
| large suite (600 sq ft) | $64,500 – $90,700 | $84,100 – $110,500 | $103,500 – $130,000 |
Montgomery 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 Montgomery is 0.80 times the national level.
For carpenters (47-2031, weighted 50%) the local median is $22.77 an hour, which is 22% below the national $29.12. The middle half of them earn between $17.72 and $26.19 an hour. BLS counts 300 of them working in the area, 18.1 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 $21.27 an hour, which is 22% below the national $27.41. The middle half of them earn between $17.23 and $26.49 an hour. BLS counts 130 of them working in the area, 7.9 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 $23.99 an hour, 21% below the US median of $30.38. The middle half of them earn between $22.26 and $30.23 an hour. About 760 work in the metro. That is 45.9 per 10,000 jobs, compared with 48.7 nationally, so the supply of crews looks typical.
For plumbers, pipefitters and steamfitters (47-2152, weighted 10%) the local median is $27.87 an hour, which is 9% below the national $30.67. The middle half of them earn between $22.19 and $29.79 an hour. BLS counts 340 of them working in the area, 20.5 for every 10,000 jobs (US: 30.0), so the local bench is thinner than average.
Drywall and ceiling tile installers (47-2081) carry 10% of the labor weighting. BLS does not publish this trade for the Montgomery metro, so we used the Alabama statewide median: $23.08 an hour against $28.33 for the US. The middle half of them earn between $20.04 and $24.75 an hour.
Roofers (47-2181) carry 10% of the labor weighting. BLS does not publish this trade for the Montgomery metro, so we used the Alabama statewide median: $21.96 an hour against $26.65 for the US. The middle half of them earn between $20.36 and $25.64 an hour.
Quotes come from real crews, not medians. If the carpenters on your job are paid at the 75th percentile ($26.19 an hour) instead of the median, the labor line grows by about $2,250. At the 25th percentile ($17.72) it shrinks by about $3,300. The total moves by 4.6% or 6.7%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 165,550 jobs in the Montgomery area. That makes it the 142nd largest of the 300 metros we cover, with 0.11% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $17.72 | $22.77 | $26.19 | $29.12 | 0.78 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $17.23 | $21.27 | $26.49 | $27.41 | 0.78 | metro |
| Electricians (47-2111) | 10% | $22.26 | $23.99 | $30.23 | $30.38 | 0.79 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $22.19 | $27.87 | $29.79 | $30.67 | 0.91 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $20.04 | $23.08 | $24.75 | $28.33 | 0.81 | state |
| Roofers (47-2181) | 10% | $20.36 | $21.96 | $25.64 | $26.65 | 0.82 | state |
| Blended | 100% | 0.80 | |||||
What nearby projects cost in Montgomery
Because every project leans on different trades, Montgomery's wage level does not move all prices equally. Against the US midpoint, kitchen remodel runs −7% and roof replacement −13%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $17,200 – $29,300 | −7% |
| Bathroom remodel | 45 sq ft | $4,200 – $20,700 | −11% |
| Detached garage | 576 sq ft | $25,300 – $50,800 | −13% |
| Roof replacement | 2,000 sq ft of roof | $5,250 – $11,000 | −13% |
How Montgomery compares
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 $46,900 to $50,900 across Montgomery and its five closest metros.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Montgomery, ALthis page | $32,500 – $65,800 | $49,200 | |
| Auburn, AL50 miles | $32,400 – $65,800 | $49,100 | level |
| Birmingham, AL80 miles | $33,700 – $68,200 | $50,900 | +4% |
| Columbus, GA90 miles | $31,800 – $64,500 | $48,200 | −2% |
| Dothan, AL95 miles | $31,000 – $62,900 | $46,900 | −4% |
| Tuscaloosa, AL95 miles | $33,100 – $67,100 | $50,100 | +2% |
| Alabama (statewide) | $32,900 – $66,800 | $49,800 | +1% |
| United States | $38,000 – $77,000 | $57,500 | +17% |
Across 300 US metros, Montgomery comes in at #264 from the top. The priciest is Honolulu, HI at $79,600; the cheapest is Brownsville, TX at $44,300 (midpoints, 300 sq ft). Statewide, Montgomery is 1% below the Alabama figure.
Other Alabama metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Birmingham, AL | 520,290 jobs | $33,700 – $68,200 | $50,900 | +4% |
| Huntsville, AL | 266,650 jobs | $33,200 – $67,300 | $50,200 | +2% |
| Mobile, AL | 172,550 jobs | $33,300 – $67,500 | $50,400 | +2% |
| Tuscaloosa, AL | 108,460 jobs | $33,100 – $67,100 | $50,100 | +2% |
| Daphne, AL | 87,120 jobs | $32,400 – $65,800 | $49,100 | level |
| Auburn, AL | 72,710 jobs | $32,400 – $65,800 | $49,100 | level |
Cities with a workforce like Montgomery's
Big cities and small ones price differently, so here is Montgomery against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Peoria, IL | 166,020 jobs | $43,700 – $88,300 | $66,000 | +34% |
| Spartanburg, SC | 165,150 jobs | $33,600 – $68,100 | $50,900 | +3% |
| Lubbock, TX | 166,780 jobs | $30,600 – $62,100 | $46,400 | −6% |
| Beaumont, TX | 163,220 jobs | $35,300 – $71,400 | $53,400 | +9% |
Climate in Montgomery: timing your home addition job
We use NOAA's 1991-2020 climate normals for Montgomery Ap (10 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 Montgomery (9 of 12 months). June, July and August have an average daytime high of 90°F or more.
Montgomery gets about 51 inches of precipitation in a normal year. The wettest months are March, July and December (5.2 inches in March). Inside the workable window, September and October are the driest, at 3.7 and 2.9 inches. The station averages about 93 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 | 60 | 37 | 4.6 | Workable |
| Feb | 65 | 40 | 4.9 | Workable |
| Mar | 72 | 47 | 5.2 | Workable |
| Apr | 79 | 53 | 4.0 | Workable |
| May | 86 | 61 | 3.9 | Workable |
| Jun | 92 | 69 | 4.1 | Hot |
| Jul | 94 | 72 | 5.1 | Hot |
| Aug | 94 | 71 | 4.0 | Hot |
| Sep | 89 | 66 | 3.7 | Workable |
| Oct | 80 | 55 | 2.9 | Workable |
| Nov | 70 | 43 | 3.9 | Workable |
| Dec | 62 | 39 | 5.0 | Workable |
Specs and site conditions that change a Montgomery 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.
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 $42,500 to $55,800 for Montgomery, AL is attached.
Detailed home addition report for Montgomery, AL, $9
The report lays out the home addition numbers for Montgomery, AL 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 Montgomery: your questions
+How much does it cost to build a home addition in Montgomery?
For 300 sq ft, expect $32,500 to $65,800 in the Montgomery area. A standard-spec job lands at $42,500 to $55,800. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in Montgomery?
About $107 to $214 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 Montgomery or Auburn?
Auburn is 50 miles away. The midpoint for 300 sq ft there is $49,100, which is 0% less than Montgomery ($49,200). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Montgomery?
About 62% at the midpoint, or $30,700 out of $49,200. Materials are 35% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Montgomery?
$43,100 to $87,200. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Montgomery?
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 Montgomery area (our national range of $500 to $2,000 scaled by the local price level).
+Is Montgomery expensive for home addition compared with the rest of Alabama?
Montgomery is 1% below the Alabama statewide estimate ($49,800 at the midpoint). We cover 9 metros in Alabama; see the state page to compare them.
+What do carpenters earn in Montgomery?
The BLS median is $22.77 an hour in the Montgomery area, compared with $29.12 nationally. The 25th to 75th percentile range is $17.72 to $26.19.
+What do basic and premium home addition work cost in Montgomery?
For 300 sq ft, basic work runs $32,500 to $45,800 and premium work $52,500 to $65,800. 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 Montgomery?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are September through May. September and October 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 Montgomery
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.