Home / Siding replacement cost / Portsmouth, NH
Portsmouth · Rockingham County · labor +24.2%
Siding replacement cost in Portsmouth, NH
A 1,500 sq ft siding job in vinyl siding comes to about $6,750 to $20,200 in Portsmouth once the national installed price is adjusted for what carpenters earn locally. The city's fee schedule names this work puts the permit at $110 for a job at the midpoint.
Figures checked October 20, 2026 · sources
- 1Vinyl, 1,500 sq ft $6,750–$20,200
- 2Labor index +24.2% vs US
- 3Portsmouth permit $110
Change size or material All Portsmouth projects
Siding replacement prices in Portsmouth by material
Each row starts from the installed price per square foot of wall published in a national cost guide, then moves only the labor part of that price by Portsmouth's labor index. For 1,500 sq ft:
| Material | National | Portsmouth | Midpoint |
|---|---|---|---|
| Vinyl siding | $6,000–$18,000 | $6,750–$20,200 | $13,450 |
| Fiber cement siding | $9,000–$22,500 | $9,750–$24,700 | $17,200 |
| Engineered wood siding | $10,500–$18,000 | $11,250–$20,200 | $15,700 |
| Cedar siding | $9,000–$24,000 | $9,750–$26,200 | $17,950 |
By size
| Wall area to side (sq ft) | Portsmouth estimate | Permit at midpoint |
|---|---|---|
| 1,000 sq ft | $4,500–$13,450 | $75 |
| 1,500 sq ft | $6,750–$20,200 | $110 |
| 2,000 sq ft | $8,950–$26,900 | $145 |
| 2,500 sq ft | $11,200–$33,650 | $180 |
Vinyl siding.
Permit fee in Portsmouth
Named in the schedule The fee schedule names this kind of work.
“Examples are: Siding, replacement windows, roofing, pools, sheds”
“1 & 2 Family Detached - $8/$1000 cost per construction, minimum $75.00”
“$8.00 per $1,000 of renovation cost”
“All fees shall be rounded up to the nearest $5.00.”
Applied to a 1,500 sq ft siding job estimated at $6,750 to $20,200, that gives $75 to $165, about 0.82% of the midpoint price. Among the 10 towns on this site whose schedules cover this work, Portsmouth ranks 3 from the cheapest; Newport is lowest at $100 and Lebanon highest at $160.65 for its own midpoint job.
Schedule: City of Portsmouth, Building Permits Fee Schedule (no effective date shown). The building department decides whether a permit is required and what valuation it accepts; the national guide puts siding job permits at $30–$200.
Why Portsmouth differs from the national price
Portsmouth is in Rockingham County, which the Bureau of Labor Statistics counts in the Boston-Cambridge-Newton, MA-NH metropolitan area (mostly Massachusetts). The median wage there for carpenters is $36.16 an hour against $29.12 nationally, so the labor part of a national price is scaled by 1.242 (+24.2%). That area is mostly Massachusetts; the New Hampshire statewide median for the same trade is $29.42, so a Portsmouth quote may land nearer the low end of the range shown.
On this job the labor portion is $3,000 to $9,000 at national rates and $3,750 to $11,200 at Portsmouth rates, so the midpoint rises $1,450 above the national figure. Against the New Hampshire statewide wage it is $1,400 higher. Materials are priced at the national figure: shingle, lumber and equipment prices are set by distributors, not by a town.
A second published benchmark points the same way for the region: Remodeling's 2025 Cost vs Value report prices its “Siding Replacement, Vinyl” job at $17,950 nationally and $17,600 in New England, and its “Siding Replacement, Fiber-Cement” job at $21,500 nationally and $20,700 in New England. Those are fixed specification jobs, not per-square-foot prices, so they are shown for comparison only.
Portsmouth at a glance
Portsmouth had 23,536 residents in the state's 2025 estimate, up 10.8% from 21,233 in 2010, faster than the state's 7.5% over the same years. At 1,487 people per square mile it is one of the most built-up places on this site (2 of 19 by density), so crews often work on tight lots with neighbours close by.
51.9% of Portsmouth's occupied homes are lived in by their owners, fewer than the 72.8% statewide, and the median owner-occupied home is valued at $688,500 (New Hampshire: $402,500). The midpoint estimate for this siding job works out to 2% of that median value, a small share of what a typical house there is worth.
Taking off the old siding
Remove the old siding adds $0.70 to $2 per sq ft nationally (“$0.70 to $2.00 per square foot (old siding removal)”). That work is all labor, so at Portsmouth's index it is $1,300 to $3,750 for 1,500 sq ft, on top of the estimate above.
Before asking for quotes
- The Portsmouth building department can say for free whether this job needs a permit and what it will cost; the schedule linked above is its own published document.
- Written quotes that list the same scope (area, material line, removal, disposal, permit) can be compared line by line; the quote comparison guide walks through it with these numbers.
- A quote far below $6,750 or above $20,200 is not wrong in itself, but it is worth asking what it includes or leaves out.
Other projects in Portsmouth
Roof replacement cost in Portsmouth · Deck building cost in Portsmouth · Heat pump installation cost in Portsmouth
Siding replacement in nearby towns
| Town | Labor area | Estimate | Permit |
|---|---|---|---|
| Durham | Boston-Cambridge-Newton | $6,750–$20,200 | $144.15 |
| Exeter | Boston-Cambridge-Newton | $6,750–$20,200 | $117.25 |
| Londonderry | Boston-Cambridge-Newton | $6,750–$20,200 | $132.60 |
| Rochester | Boston-Cambridge-Newton | $6,750–$20,200 | $136 |
| Salem | Boston-Cambridge-Newton | $6,750–$20,200 | $100 |
More: all siding replacement town pages · permit fees by town · labor costs in New Hampshire
Sources
- Installed price: HomeGuide: Siding cost (Oct 29, 2025) — “Vinyl $4 – $12 (installed, per sq ft)”.
- Labor portion: HomeGuide: Siding cost (Oct 29, 2025) — “$2 to $6 per square foot (siding labor)”.
- Labor index: O*NET OnLine, Carpenters (47-2031.00), New Hampshire local wages; area definitions: BLS, May 2025 Metropolitan and Nonmetropolitan Area Definitions.
- Permit: City of Portsmouth, Building Permits Fee Schedule.
- Population: NH Office of Planning and Development, 2025 Population Estimates of New Hampshire Cities and Towns (published July 17, 2026); housing: Census QuickFacts, Portsmouth.
All figures checked October 20, 2026. Estimates are ranges built from published averages, not quotes; a contractor's price depends on the house, access, the season and the scope written into the quote. Cost by Town does not perform or arrange work.