Home addition cost in Chattanooga, TN
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $34,000 – $68,900
- Per sq ft
- $112 – $224
- before permit
- Versus US midpoint
- −10%
- US $57,500
- Rank of 300 metros
- #194
- 1 = most expensive
Local price for a home addition in the Chattanooga area: $34,000 to $68,900 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 runs 10% lower than the US figure. Carpenters earn a median of $24.41 an hour in the Chattanooga area, 16% below the US median of $29.12.
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Estimated cost for 300 sq ft in Chattanooga, TN, standard level
$44,500 to $58,500
About $145 to $190 per sq ft before permits. Labor is about 64% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $15,000 | $19,600 |
| Labor | $28,600 | $37,500 |
| Permits and fees | $870 | $1,400 |
| Total | $44,500 | $58,500 |
Cost breakdown for 300 sq ft in Chattanooga, TN
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,500 | $17,300 | $23,000 | 34% |
| Labor | $22,000 | $33,000 | $44,100 | 64% |
| Permits and fees | $460 | $1,150 | $1,850 | 2% |
| Total | $34,000 | $51,500 | $68,900 | 100% |
What is behind the Chattanooga 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 Chattanooga the blended ratio comes out at 0.86.
Materials are scaled with BEA's regional price parity for goods. Chattanooga is at 96.0 against 100 for the US, so a materials line of $18,000 nationally becomes $17,300 here (midpoint, 300 sq ft). Permits follow the all-items index of 91.5: $460 to $1,850.
Chattanooga: what basic, standard and premium work costs
The cited range is split into basic, standard and premium bands, then scaled to Chattanooga. 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
$34,000 to $48,000
Bump-out or simple room without plumbing
Standard
$44,500 to $58,500
Standard room addition with HVAC and electrical
Premium
$55,000 to $68,900
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $11,600 – $16,700 | $15,400 – $20,400 | $19,200 – $24,200 |
| 20x20 room (400 sq ft) | $45,200 – $63,600 | $59,000 – $77,500 | $72,900 – $91,300 |
| large suite (600 sq ft) | $67,600 – $94,900 | $88,100 – $115,500 | $108,500 – $136,000 |
Who does the work: Chattanooga 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 Chattanooga the blend is 0.86.
Carpenters (47-2031), 50% of the weighting: a median of $24.41 an hour, 16% below the US median of $29.12. The middle half of them earn between $22.40 and $29.19 an hour. About 620 work in the metro. That is 23.1 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 $21.81 an hour, 20% below the US median of $27.41. The middle half of them earn between $20.29 and $24.88 an hour. About 210 work in the metro. That is 7.8 per 10,000 jobs, compared with 13.3 nationally, so expect fewer local crews to bid.
For electricians (47-2111, weighted 10%) the local median is $34.77 an hour, which is 14% above the national $30.38. The middle half of them earn between $23.68 and $37.19 an hour. BLS counts 1,760 of them working in the area, 65.5 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 $28.23 an hour, 8% below the US median of $30.67. The middle half of them earn between $22.34 and $34.14 an hour. About 860 work in the metro. That is 32.0 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 $21.72 an hour, which is 23% below the national $28.33. The middle half of them earn between $17.48 and $25.39 an hour. BLS counts 60 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 $21.89 an hour, 18% below the US median of $26.65. The middle half of them earn between $18.45 and $22.14 an hour. About 140 work in the metro. That is 5.2 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 $3,150 to the midpoint estimate; the 25th percentile takes off about $1,300. That is a swing of roughly 2.6% to 6.1% of the total, which is useful for judging whether a bid reflects wages or something else, such as scope or margin.
Chattanooga has 268,750 jobs in total (BLS, May 2025), ranking 98th 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% | $22.40 | $24.41 | $29.19 | $29.12 | 0.84 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $20.29 | $21.81 | $24.88 | $27.41 | 0.80 | metro |
| Electricians (47-2111) | 10% | $23.68 | $34.77 | $37.19 | $30.38 | 1.14 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $22.34 | $28.23 | $34.14 | $30.67 | 0.92 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $17.48 | $21.72 | $25.39 | $28.33 | 0.77 | metro |
| Roofers (47-2181) | 10% | $18.45 | $21.89 | $22.14 | $26.65 | 0.82 | metro |
| Blended | 100% | 0.86 | |||||
The best months for home addition in Chattanooga
Climate numbers on this page come from NOAA's 1991-2020 U.S. Climate Normals at the nearest suitable station, Chattanooga Lovell 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 Chattanooga are February through June and September through December: 9 of 12. Outside them, January has an average overnight low at or below freezing (32°F), and July and August have an average daytime high of 90°F or more.
In January the average low is at or below freezing, which means frozen ground and slower digging, compaction and sod or stone placement. NOAA counts about 56 days a year with a low at or below 32°F at this station.
Chattanooga gets about 55 inches of precipitation in a normal year, including roughly 4 inches of snow. The wettest months are March, July and December (5.3 inches in March). Inside the workable window, May and October are the driest, at 3.9 and 3.6 inches. The station averages about 58 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 | 51 | 32 | 5.0 | Cold |
| Feb | 56 | 36 | 5.0 | Workable |
| Mar | 64 | 42 | 5.3 | Workable |
| Apr | 74 | 50 | 4.9 | Workable |
| May | 81 | 59 | 3.9 | Workable |
| Jun | 88 | 67 | 4.2 | Workable |
| Jul | 91 | 71 | 5.1 | Hot |
| Aug | 90 | 70 | 3.7 | Hot |
| Sep | 84 | 64 | 4.2 | Workable |
| Oct | 74 | 51 | 3.6 | Workable |
| Nov | 62 | 40 | 4.8 | Workable |
| Dec | 53 | 35 | 5.3 | Workable |
Chattanooga against nearby metros and the rest of Tennessee
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 $48,400 to $53,500 across Chattanooga and its five closest metros.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Chattanooga, TNthis page | $34,000 – $68,900 | $51,500 | |
| Dalton, GA35 miles | $31,900 – $64,800 | $48,400 | −6% |
| Huntsville, AL80 miles | $33,200 – $67,300 | $50,200 | −2% |
| Knoxville, TN95 miles | $33,600 – $68,100 | $50,800 | −1% |
| Gainesville, GA100 miles | $32,900 – $66,800 | $49,800 | −3% |
| Nashville, TN105 miles | $35,300 – $71,600 | $53,500 | +4% |
| Tennessee (statewide) | $33,800 – $68,600 | $51,200 | −1% |
| United States | $38,000 – $77,000 | $57,500 | +12% |
Out of the 300 metros we cover, Chattanooga ranks #194 for the cost of this job (#1 is the most expensive). Statewide, Chattanooga is 1% above the Tennessee figure.
Elsewhere in Tennessee
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Nashville, TN | 1,099,300 jobs | $35,300 – $71,600 | $53,500 | +4% |
| Memphis, TN | 611,670 jobs | $33,900 – $68,700 | $51,300 | level |
| Knoxville, TN | 424,600 jobs | $33,600 – $68,100 | $50,800 | −1% |
| Kingsport, TN | 119,560 jobs | $32,700 – $66,200 | $49,400 | −4% |
| Clarksville, TN | 103,220 jobs | $33,000 – $66,900 | $50,000 | −3% |
| Jackson, TN | 84,530 jobs | $32,700 – $66,300 | $49,500 | −4% |
Metros of a similar size
Big cities and small ones price differently, so here is Chattanooga against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Poughkeepsie, NY | 268,970 jobs | $40,900 – $83,000 | $62,000 | +20% |
| Huntsville, AL | 266,650 jobs | $33,200 – $67,300 | $50,200 | −2% |
| Jackson, MS | 270,730 jobs | $32,500 – $65,800 | $49,200 | −4% |
| Lakeland, FL | 265,280 jobs | $32,300 – $65,500 | $48,900 | −5% |
Why two Chattanooga quotes can differ
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.
Related projects, priced for Chattanooga
Jobs that often go together with home addition are priced below at their usual sizes, using the same Chattanooga wage and price inputs. Compared with national midpoints, kitchen remodel comes out highest (−6%) and roof replacement lowest (−12%); the gap comes from the trades each job uses.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $17,400 – $29,700 | −6% |
| Bathroom remodel | 45 sq ft | $4,250 – $21,000 | −10% |
| Detached garage | 576 sq ft | $26,600 – $53,400 | −8% |
| Roof replacement | 2,000 sq ft of roof | $5,300 – $11,100 | −12% |
Get 3 local quotes
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Home addition in Chattanooga: your questions
+How much does it cost to build a home addition in Chattanooga?
For 300 sq ft, expect $34,000 to $68,900 in the Chattanooga area. A standard-spec job lands at $44,500 to $58,500. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in Chattanooga?
About $112 to $224 per sq ft for materials and labor, plus $460 to $1,850 for the permit if one is needed. The US range is $125 to $250.
+Is home addition cheaper in Chattanooga or Dalton?
Dalton is 35 miles away. The midpoint for 300 sq ft there is $48,400, which is 6% less than Chattanooga ($51,500). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Chattanooga?
About 64% at the midpoint, or $33,000 out of $51,500. Materials are 34% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Chattanooga?
$45,200 to $91,300. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Chattanooga?
Often, but rules are set by your city or county building office, so call before you hire. Budget $460 to $1,850 for fees in the Chattanooga area (our national range of $500 to $2,000 scaled by the local price level).
+Is Chattanooga expensive for home addition compared with the rest of Tennessee?
Chattanooga is 1% above the Tennessee statewide estimate ($51,200 at the midpoint). We cover 8 metros in Tennessee; see the state page to compare them.
+What do carpenters earn in Chattanooga?
The BLS median is $24.41 an hour in the Chattanooga area, compared with $29.12 nationally. The 25th to 75th percentile range is $22.40 to $29.19.
+What do basic and premium home addition work cost in Chattanooga?
For 300 sq ft, basic work runs $34,000 to $48,000 and premium work $55,000 to $68,900. 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 Chattanooga?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are February through June and September through December. May 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 Chattanooga
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.