Rockingham County · Boston-Cambridge-Newton labor area · 34,691 residents
Home project costs in Derry, NH
What a roof, siding, deck, fence, driveway or heat pump costs in Derry after national installed prices are adjusted for local trade wages. 3 of the six have their own page here because the town's fee schedule sets a permit fee for them.
- 1Roof $8,600–$13,200
- 2Siding $6,750–$20,200
- 3Deck $8,850–$17,700
Six projects at their reference sizes
| Project | Size, material | Estimate | Permit |
|---|---|---|---|
| Roof replacement | 2,000 sq ft, architectural | $8,600–$13,200 | $89.43 |
| Siding replacement | 1,500 sq ft, vinyl | $6,750–$20,200 | $102.25 |
| Deck building | 320 sq ft, pressure-treated | $8,850–$17,700 | $50 |
| Fence installation | 150 linear ft, wood | $3,250–$8,300 | no line |
| Driveway paving | 600 sq ft, asphalt | $3,500–$8,200 | no line |
| Heat pump installation | 2,000 sq ft home, ducted air-source | $11,450–$22,850 | no line |
“No line” means the town's schedule, as read on October 21, 2026, sets no fee this site could apply to that work; the building department can say whether a permit is needed.
Labor index by trade
Rockingham County sits in the Boston-Cambridge-Newton, MA-NH. Each project's labor is scaled by the trade that does it:
| Trade | Local median | US median | Index |
|---|---|---|---|
| Roofers | $31.90 | $26.65 | +19.7% |
| Carpenters | $36.16 | $29.12 | +24.2% |
| Construction laborers | $30.49 | $22.66 | +34.6% |
| Paving, surfacing and tamping equipment operators | $32.94 | $25.64 | +28.5% |
| Cement masons and concrete finishers | $30.23 | $27.41 | +10.3% |
| HVAC mechanics and installers | $37.75 | $29.33 | +28.7% |
* BLS publishes no estimate for this trade in the Boston-Cambridge-Newton area; New Hampshire statewide median used. Wages: BLS 2025 wage data via O*NET OnLine.
The Boston-Cambridge-Newton area BLS uses for Rockingham County is mostly Massachusetts, where trade wages run higher than in New Hampshire. The statewide New Hampshire medians are shown on each project page next to the area figure, so the gap is visible rather than hidden in one number.
Derry in numbers
Derry had 34,691 residents in the state's 2025 estimate, up 4.8% from 33,109 in 2010, slower than the state's 7.5%. Its density of 973 people per square mile puts it 9 of 24 among the towns on this site.
The Census Bureau's QuickFacts page for Derry covers only the Derry census-designated place, not the whole town, so its housing figures are not used here.
The town's permit schedule
Read from Town of Derry Code, Chapter 30 Building and Property Maintenance Codes, § 30-4 (effective 1-3-2017, amended 5-15-2025). The lines this site uses:
“108.2.1: application fee of $35 for residential and $45 for commercial plus an additional fee of $5 per $1,000 of construction cost.”
“108.2.6: Permit fees for new decks or replacement decks shall be $50 per deck.”
Nearby towns
Same labor area (Boston-Cambridge-Newton): Boston · Durham · Exeter · Londonderry · Portsmouth · Rochester · Salem · Somersworth.
All towns: town list · State: roof in New Hampshire, siding in New Hampshire, deck in New Hampshire, heat pump in New Hampshire · Guides: permit fees by town, labor costs in New Hampshire
Population: NH Office of Planning and Development, 2025 Population Estimates of New Hampshire Cities and Towns (published July 17, 2026). Checked October 21, 2026. Estimates are ranges from published averages, not quotes.