Home addition cost in Barnstable, MA
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $42,400 – $85,800
- Per sq ft
- $140 – $280
- before permit
- Versus US midpoint
- +12%
- US $57,500
- Rank of 300 metros
- #37
- 1 = most expensive
If you want to build a home addition in Barnstable, plan on $42,400 to $85,800 for 300 sq ft, all in. Per sq ft, that is $140 to $280 for materials and labor, with the permit on top. The local midpoint runs 12% higher than the national one. Carpenters earn a median of $33.93 an hour in the Barnstable area, 17% above the US median of $29.12.
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Estimated cost for 300 sq ft in Barnstable, MA, standard level
$55,400 to $72,800
About $182 to $238 per sq ft before permits. Labor is about 71% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $15,100 | $19,800 |
| Labor | $39,400 | $51,500 |
| Permits and fees | $930 | $1,500 |
| Total | $55,400 | $72,800 |
Cost breakdown for 300 sq ft in Barnstable, MA
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,600 | $17,500 | $23,300 | 27% |
| Labor | $30,300 | $45,400 | $60,600 | 71% |
| Permits and fees | $490 | $1,250 | $1,950 | 2% |
| Total | $42,400 | $64,100 | $85,800 | 100% |
Why Barnstable prices look the way they do
Labor is 71% 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 Barnstable the blended ratio comes out at 1.19.
On the materials line, the BEA goods price index for the Barnstable metro is 97.0 (US = 100). The midpoint materials bill for 300 sq ft comes to $17,500, compared with $18,000 at national prices. Permit and inspection fees are scaled by the broader index (98.4) and land at $490 to $1,950.
Data note: 30% of the labor weighting for this project uses a statewide median because BLS has no published metro figure for that trade in Barnstable. The wage table below marks each row.
Climate in Barnstable: timing your home addition job
We use NOAA's 1991-2020 climate normals for Hyannis Barnstable Muni Ap (5 miles from the city center). These are 30-year monthly averages, not forecasts.
April through November is the stretch where digging, grading and setting material in the ground runs into the fewest weather problems in Barnstable (8 of 12 months). January, February, March and December have an average overnight low at or below freezing (32°F).
In January, February, March 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 109 days a year with a low at or below 32°F at this station.
Barnstable gets about 45 inches of precipitation in a normal year. The wettest months are March, October and December (4.7 inches in December). Inside the workable window, June and July are the driest, at 3.1 and 2.7 inches. 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 | 40 | 24 | 3.9 | Cold |
| Feb | 41 | 25 | 3.2 | Cold |
| Mar | 46 | 30 | 4.3 | Cold |
| Apr | 55 | 39 | 3.9 | Workable |
| May | 65 | 48 | 3.4 | Workable |
| Jun | 74 | 58 | 3.1 | Workable |
| Jul | 81 | 65 | 2.7 | Workable |
| Aug | 80 | 63 | 3.3 | Workable |
| Sep | 73 | 56 | 3.9 | Workable |
| Oct | 63 | 46 | 4.3 | Workable |
| Nov | 54 | 37 | 4.1 | Workable |
| Dec | 45 | 29 | 4.7 | Cold |
Specs and site conditions that change a Barnstable bid
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.
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).
Cost by quality level and size in Barnstable
Three bands are cut from the same cited range and localized for Barnstable 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 $85,800
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $14,500 – $20,600 | $19,100 – $25,300 | $23,700 – $29,900 |
| 20x20 room (400 sq ft) | $56,400 – $79,300 | $73,600 – $96,600 | $90,800 – $114,000 |
| large suite (600 sq ft) | $84,300 – $118,500 | $110,000 – $144,000 | $135,500 – $169,500 |
Barnstable against nearby metros and the rest of Massachusetts
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 $58,100 to $68,100 across Barnstable and its five closest metros.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Barnstable, MAthis page | $42,400 – $85,800 | $64,100 | |
| Providence, RI60 miles | $39,300 – $79,700 | $59,500 | −7% |
| Boston, MA70 miles | $44,300 – $89,700 | $67,000 | +4% |
| Worcester, MA100 miles | $45,000 – $91,100 | $68,100 | +6% |
| Norwich, CT100 miles | $39,800 – $80,700 | $60,300 | −6% |
| Manchester, NH115 miles | $38,400 – $77,800 | $58,100 | −9% |
| Massachusetts (statewide) | $44,400 – $89,800 | $67,100 | +5% |
| United States | $38,000 – $77,000 | $57,500 | −10% |
Across 300 US metros, Barnstable comes in at #37 from the top. The priciest is Honolulu, HI at $79,600; the cheapest is Brownsville, TX at $44,300 (midpoints, 300 sq ft). Statewide, Barnstable is 4% below the Massachusetts figure.
Other Massachusetts metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Boston, MA | 2,703,890 jobs | $44,300 – $89,700 | $67,000 | +4% |
| Worcester, MA | 349,880 jobs | $45,000 – $91,100 | $68,100 | +6% |
| Springfield, MA | 201,240 jobs | $44,200 – $89,300 | $66,800 | +4% |
| Amherst, MA | 65,670 jobs | $41,700 – $84,300 | $63,000 | −2% |
| Pittsfield, MA | 56,810 jobs | $40,100 – $81,200 | $60,700 | −5% |
Cities with a workforce like Barnstable's
Big cities and small ones price differently, so here is Barnstable against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Macon, GA | 95,030 jobs | $31,500 – $63,800 | $47,600 | −26% |
| Billings, MT | 93,800 jobs | $38,700 – $78,400 | $58,600 | −9% |
| Fort Smith, AR | 95,560 jobs | $30,300 – $61,500 | $45,900 | −28% |
| Iowa City, IA | 93,760 jobs | $34,100 – $69,000 | $51,600 | −20% |
Barnstable 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 Barnstable is 1.19 times the national level.
For carpenters (47-2031, weighted 50%) the local median is $33.93 an hour, which is 17% above the national $29.12. The middle half of them earn between $29.39 and $38.65 an hour. BLS counts 1,280 of them working in the area, 136.0 for every 10,000 jobs (US: 43.1), so the local bench is deeper than average.
Cement masons and concrete finishers (47-2051) carry 10% of the labor weighting. BLS does not publish this trade for the Barnstable metro, so we used the Massachusetts statewide median: $30.69 an hour against $27.41 for the US. The middle half of them earn between $26.87 and $37.60 an hour.
Electricians (47-2111), 10% of the weighting: a median of $37.78 an hour, 24% above the US median of $30.38. The middle half of them earn between $28.37 and $47.54 an hour. About 470 work in the metro. That is 49.9 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 $36.67 an hour, which is 20% above the national $30.67. The middle half of them earn between $28.25 and $46.41 an hour. BLS counts 640 of them working in the area, 68.0 for every 10,000 jobs (US: 30.0), so the local bench is deeper than average.
Drywall and ceiling tile installers (47-2081) carry 10% of the labor weighting. BLS does not publish this trade for the Barnstable metro, so we used the Massachusetts statewide median: $33.42 an hour against $28.33 for the US. The middle half of them earn between $29.51 and $38.60 an hour.
Roofers (47-2181) carry 10% of the labor weighting. BLS does not publish this trade for the Barnstable metro, so we used the Massachusetts statewide median: $34.98 an hour against $26.65 for the US. The middle half of them earn between $28.78 and $39.95 an hour.
Quotes come from real crews, not medians. If the carpenters on your job are paid at the 75th percentile ($38.65 an hour) instead of the median, the labor line grows by about $3,100. At the 25th percentile ($29.39) it shrinks by about $3,000. The total moves by 4.8% or 4.7%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 94,110 jobs in the Barnstable Town area. That makes it the 212th largest of the 300 metros we cover, with 0.06% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $29.39 | $33.93 | $38.65 | $29.12 | 1.17 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $26.87 | $30.69 | $37.60 | $27.41 | 1.12 | state |
| Electricians (47-2111) | 10% | $28.37 | $37.78 | $47.54 | $30.38 | 1.24 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $28.25 | $36.67 | $46.41 | $30.67 | 1.20 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $29.51 | $33.42 | $38.60 | $28.33 | 1.18 | state |
| Roofers (47-2181) | 10% | $28.78 | $34.98 | $39.95 | $26.65 | 1.31 | state |
| Blended | 100% | 1.19 | |||||
Related projects, priced for Barnstable
Because every project leans on different trades, Barnstable's wage level does not move all prices equally. Against the US midpoint, roof replacement runs +18% and kitchen remodel +2%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $18,800 – $32,000 | +2% |
| Bathroom remodel | 45 sq ft | $5,250 – $26,000 | +11% |
| Detached garage | 576 sq ft | $31,400 – $63,100 | +9% |
| Roof replacement | 2,000 sq ft of roof | $7,400 – $14,500 | +18% |
Get 3 local quotes
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Detailed home addition report for Barnstable, MA, $9
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Home addition in Barnstable: your questions
+How much does it cost to build a home addition in Barnstable?
For 300 sq ft, expect $42,400 to $85,800 in the Barnstable 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 Barnstable?
About $140 to $280 per sq ft for materials and labor, plus $490 to $1,950 for the permit if one is needed. The US range is $125 to $250.
+Is home addition cheaper in Barnstable or Providence?
Providence is 60 miles away. The midpoint for 300 sq ft there is $59,500, which is 7% less than Barnstable ($64,100). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Barnstable?
About 71% at the midpoint, or $45,400 out of $64,100. Materials are 27% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Barnstable?
$56,400 to $114,000. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Barnstable?
Often, but rules are set by your city or county building office, so call before you hire. Budget $490 to $1,950 for fees in the Barnstable area (our national range of $500 to $2,000 scaled by the local price level).
+Is Barnstable expensive for home addition compared with the rest of Massachusetts?
Barnstable is 4% below the Massachusetts statewide estimate ($67,100 at the midpoint). We cover 6 metros in Massachusetts; see the state page to compare them.
+What do carpenters earn in Barnstable?
The BLS median is $33.93 an hour in the Barnstable area, compared with $29.12 nationally. The 25th to 75th percentile range is $29.39 to $38.65.
+What do basic and premium home addition work cost in Barnstable?
For 300 sq ft, basic work runs $42,400 to $59,800 and premium work $68,500 to $85,800. 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 Barnstable?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are April through November. June and July 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 Barnstable
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.