Home addition cost in Davenport, IA
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $38,000 – $77,000
- Per sq ft
- $125 – $251
- before permit
- Versus US midpoint
- Level
- US $57,500
- Rank of 300 metros
- #117
- 1 = most expensive
Local price for a home addition in the Davenport area: $38,000 to $77,000 for 300 sq ft. The low end is a basic job on easy ground; the high end is a premium spec with harder access. The midpoint lands close to the US figure. Carpenters earn a median of $29.06 an hour in the Davenport area, 0% below the US median of $29.12.
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Estimated cost for 300 sq ft in Davenport, IA, standard level
$49,700 to $65,300
About $163 to $213 per sq ft before permits. Labor is about 69% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $14,700 | $19,200 |
| Labor | $34,200 | $44,700 |
| Permits and fees | $850 | $1,400 |
| Total | $49,700 | $65,300 |
Cost breakdown for 300 sq ft in Davenport, IA
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,300 | $17,000 | $22,600 | 29% |
| Labor | $26,300 | $39,400 | $52,600 | 69% |
| Permits and fees | $450 | $1,100 | $1,800 | 2% |
| Total | $38,000 | $57,500 | $77,000 | 100% |
Where the Davenport 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 $29.06 an hour. Add the other trades involved and the blended wage index for Davenport is 1.03 (US = 1.00), which puts labor at 69% of the total.
Materials are scaled with BEA's regional price parity for goods. Davenport is at 94.2 against 100 for the US, so a materials line of $18,000 nationally becomes $17,000 here (midpoint, 300 sq ft). Permits follow the all-items index of 89.1: $450 to $1,800.
The best months for home addition in Davenport
Climate numbers on this page come from NOAA's 1991-2020 U.S. Climate Normals at the nearest suitable station, Davenport (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 Davenport are April through October: 7 of 12. Outside them, January, February, March, November and December have an average overnight low at or below freezing (32°F).
In January, February, March, November and December the average low is at or below freezing, which means frozen ground and slower digging, compaction and sod or stone placement. NOAA counts about 136 days a year with a low at or below 32°F at this station.
Davenport gets about 36 inches of precipitation in a normal year. The wettest months are May, June and July (4.8 inches in May). Inside the workable window, September and October are the driest, at 3.5 and 2.7 inches. The station averages about 13 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 | 30 | 14 | 1.1 | Cold |
| Feb | 34 | 18 | 1.4 | Cold |
| Mar | 48 | 29 | 2.3 | Cold |
| Apr | 61 | 39 | 3.6 | Workable |
| May | 73 | 51 | 4.8 | Workable |
| Jun | 81 | 61 | 4.7 | Workable |
| Jul | 84 | 64 | 4.1 | Workable |
| Aug | 82 | 62 | 4.0 | Workable |
| Sep | 76 | 53 | 3.5 | Workable |
| Oct | 63 | 42 | 2.7 | Workable |
| Nov | 48 | 30 | 2.3 | Cold |
| Dec | 35 | 20 | 1.6 | Cold |
Who does the work: Davenport trade wages
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 Davenport the blend is 1.03.
Carpenters (47-2031), 50% of the weighting: a median of $29.06 an hour, in line with the US median of $29.12. The middle half of them earn between $23.15 and $35.60 an hour. About 670 work in the metro. That is 37.1 per 10,000 jobs, compared with 43.1 nationally, so the supply of crews looks typical.
Cement masons and concrete finishers (47-2051), 10% of the weighting: a median of $29.17 an hour, 6% above the US median of $27.41. The middle half of them earn between $23.04 and $33.92 an hour. About 220 work in the metro. That is 12.2 per 10,000 jobs, compared with 13.3 nationally, so the supply of crews looks typical.
For electricians (47-2111, weighted 10%) the local median is $36.99 an hour, which is 22% above the national $30.38. The middle half of them earn between $24.82 and $41.20 an hour. BLS counts 1,450 of them working in the area, 80.4 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 $36.69 an hour, 20% above the US median of $30.67. The middle half of them earn between $28.55 and $46.29 an hour. About 680 work in the metro. That is 37.7 per 10,000 jobs, compared with 30.0 nationally, which suggests plenty of local crews to bid.
For drywall and ceiling tile installers (47-2081, weighted 10%) the local median is $27.57 an hour, which is in line with the national $28.33. The middle half of them earn between $21.67 and $30.00 an hour. BLS counts 40 of them working in the area, 2.2 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 $23.20 an hour, 13% below the US median of $26.65. The middle half of them earn between $22.33 and $30.84 an hour. About 110 work in the metro. That is 6.1 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 $4,300 to the midpoint estimate; the 25th percentile takes off about $3,900. That is a swing of roughly 6.7% to 7.5% of the total, which is useful for judging whether a bid reflects wages or something else, such as scope or margin.
Davenport-Moline-Rock Island has 180,450 jobs in total (BLS, May 2025), ranking 128th 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% | $23.15 | $29.06 | $35.60 | $29.12 | 1.00 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $23.04 | $29.17 | $33.92 | $27.41 | 1.06 | metro |
| Electricians (47-2111) | 10% | $24.82 | $36.99 | $41.20 | $30.38 | 1.22 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $28.55 | $36.69 | $46.29 | $30.67 | 1.20 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $21.67 | $27.57 | $30.00 | $28.33 | 0.97 | metro |
| Roofers (47-2181) | 10% | $22.33 | $23.20 | $30.84 | $26.65 | 0.87 | metro |
| Blended | 100% | 1.03 | |||||
Planning more than one job in Davenport?
Jobs that often go together with home addition are priced below at their usual sizes, using the same Davenport wage and price inputs. Compared with national midpoints, bathroom remodel comes out highest (+1%) and roof replacement lowest (−8%); the gap comes from the trades each job uses.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $17,900 – $30,400 | −4% |
| Bathroom remodel | 45 sq ft | $4,750 – $23,600 | +1% |
| Detached garage | 576 sq ft | $28,800 – $57,800 | −1% |
| Roof replacement | 2,000 sq ft of roof | $5,600 – $11,500 | −8% |
How Davenport compares
Same job, same size (300 sq ft), priced for the nearest metros. Peoria is the priciest of the group at $66,000. Iowa City is the cheapest at $51,600.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Davenport, IAthis page | $38,000 – $77,000 | $57,500 | |
| Iowa City, IA60 miles | $34,100 – $69,000 | $51,600 | −10% |
| Peoria, IL65 miles | $43,700 – $88,300 | $66,000 | +15% |
| Dubuque, IA75 miles | $36,400 – $73,600 | $55,000 | −4% |
| Cedar Rapids, IA75 miles | $36,500 – $73,800 | $55,100 | −4% |
| Rockford, IL100 miles | $43,600 – $88,200 | $65,900 | +15% |
| Iowa (statewide) | $35,900 – $72,700 | $54,300 | −6% |
| United States | $38,000 – $77,000 | $57,500 | level |
Out of the 300 metros we cover, Davenport ranks #117 for the cost of this job (#1 is the most expensive). Statewide, Davenport is 6% above the Iowa figure.
Elsewhere in Iowa
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Des Moines, IA | 404,130 jobs | $37,300 – $75,400 | $56,300 | −2% |
| Cedar Rapids, IA | 139,260 jobs | $36,500 – $73,800 | $55,100 | −4% |
| Iowa City, IA | 93,760 jobs | $34,100 – $69,000 | $51,600 | −10% |
| Waterloo, IA | 84,260 jobs | $35,600 – $72,000 | $53,800 | −6% |
| Sioux City, IA | 75,010 jobs | $34,700 – $70,300 | $52,500 | −9% |
| Dubuque, IA | 58,470 jobs | $36,400 – $73,600 | $55,000 | −4% |
Metros of a similar size
Big cities and small ones price differently, so here is Davenport against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Asheville, NC | 180,620 jobs | $33,700 – $68,400 | $51,100 | −11% |
| Lafayette, LA | 179,570 jobs | $33,100 – $67,000 | $50,000 | −13% |
| Lincoln, NE | 182,620 jobs | $33,600 – $68,100 | $50,800 | −12% |
| Sioux Falls, SD | 178,590 jobs | $33,500 – $67,900 | $50,700 | −12% |
Home addition: what moves the price in Davenport
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.
Pick a size, pick a tier: home addition pricing in Davenport
The cited range is split into basic, standard and premium bands, then scaled to Davenport. 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
$38,000 to $53,600
Bump-out or simple room without plumbing
Standard
$49,700 to $65,300
Standard room addition with HVAC and electrical
Premium
$61,400 to $77,000
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $13,000 – $18,500 | $17,100 – $22,700 | $21,300 – $26,800 |
| 20x20 room (400 sq ft) | $50,600 – $71,200 | $66,000 – $86,600 | $81,500 – $102,000 |
| large suite (600 sq ft) | $75,600 – $106,500 | $98,600 – $129,000 | $121,500 – $152,000 |
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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 $49,700 to $65,300 for Davenport, IA is attached.
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Home addition in Davenport: your questions
+How much does it cost to build a home addition in Davenport?
For 300 sq ft, expect $38,000 to $77,000 in the Davenport area. A standard-spec job lands at $49,700 to $65,300. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in Davenport?
About $125 to $251 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 Davenport or Iowa City?
Iowa City is 60 miles away. The midpoint for 300 sq ft there is $51,600, which is 10% less than Davenport ($57,500). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Davenport?
About 69% at the midpoint, or $39,400 out of $57,500. Materials are 29% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Davenport?
$50,600 to $102,000. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Davenport?
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 Davenport area (our national range of $500 to $2,000 scaled by the local price level).
+Is Davenport expensive for home addition compared with the rest of Iowa?
Davenport is 6% above the Iowa statewide estimate ($54,300 at the midpoint). We cover 7 metros in Iowa; see the state page to compare them.
+What do carpenters earn in Davenport?
The BLS median is $29.06 an hour in the Davenport area, compared with $29.12 nationally. The 25th to 75th percentile range is $23.15 to $35.60.
+What do basic and premium home addition work cost in Davenport?
For 300 sq ft, basic work runs $38,000 to $53,600 and premium work $61,400 to $77,000. 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 Davenport?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are April through October. 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 Davenport
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.