Shed Installation cost in Portsmouth, NH
Portsmouth, NH · updated August 2026
$5,000
Typical local cost
$1,900 – $12,900
Typical range
- per shed installed
- $1,950 – $12,900
- Permit
- It depends
- Typical timeline
- 1-2 days of work
Installed, local pricing
$60 – $260 in fees
1-2 days of work, 2-5 weeks including permitting
Portsmouth runs +8% against the U.S. average · data confidence Medium · modeled estimate, not a quote
The modeled midpoint for Portsmouth is $5,000. The local adjustment for this trade is x1.077 — driven mainly by Rockingham County labor rates and 20% exposure to local code requirements.
Estimate your Portsmouth job
Priced with this market's cost index, so the calculator, the size table and the ranges on this page all agree.
Concrete needed
5.43 cubic yards
Includes 10% overage
- Cubic feet
- 133.3
- 80 lb bags
- 245 bags
- 60 lb bags
- 326 bags
- Ready-mix cost estimateDelivered, excludes labor and forms
- $965 – $1,375
Priced for Portsmouth (local adjustment x1.077).
Estimates only. Local pricing, site conditions and code requirements change the real number.
Cost by project size
Generated from the same unit pricing the calculator uses.
| Project size | Estimated range |
|---|---|
| 8×10 shed | $1,300 – $9,000 |
| 10×12 shed | $1,900 – $12,900 |
| 12×16 shed | $2,700 – $18,100 |
| 12×20 shed | $3,400 – $23,200 |
Based on Portsmouth pricing of $1,950–$12,900 per shed installed.
Where the money goes
- Labor
- $2,900
- 56% of median
- Materials
- $2,100
- 41% of median
- Permit & fees
- $160
- 3% of median
Portsmouth project costs+8% vs U.S. average
Based on Rockingham County labor rates, local material logistics and permit-fee posture for this trade.
What the project looks like start to finish
Typical sequence for this scope. Timing varies with contractor backlog and plan-review queues.
01
Planning & quotes
Scope, material choice, contractor selection
02
Permit application
Filed with City of Portsmouth building department
03
Materials & staging
Order lead time on non-stock materials
04
Installation
1-2 days of work, 2-5 weeks including permitting
05
Inspection
Anchoring / tie-down inspection, Final inspection
06
Closeout
Final sign-off, warranty and documentation
Portsmouth labor intelligence
What the trade charges here, and how much of your price it is.
Loaded hourly rate
$60–$77
Outdoor crews in Rockingham County · +9% vs U.S. ($62/hr)
Typical crew
2 × 2.5 days
On-site time for a typical shed job here.
Labor in the price
$2,900
58% of the median — the rest is material, disposal and permit.
Because labor is 58% of this job, Portsmouth wage levels move the price far more than material prices do. A quote well under this labor figure usually means a smaller crew, a longer schedule, or unlicensed help.
Basis: Hometriva labor model: national outdoor crew rates adjusted by the Rockingham County labor factor (x1.091). · BLS Occupational Employment and Wage Statistics, Hometriva methodology
Why Portsmouth differs from the national average
The local delta, broken into dollars by driver.
Trade labor rates+$250
Rockingham County crews price 9% above the national average, and labor is 58% of this job.
Material and delivery+$100
Materials are nationally traded, so they move less — but delivery into this market runs 5% over baseline.
Permit fees-$25
Fees are paid to the jurisdiction, not the contractor, and are budgeted separately from the contract price.
Basis: Decomposition of the modeled Portsmouth median against the U.S. median for this scope. · City of Portsmouth building department, Hometriva methodology
Portsmouth vs New Hampshire vs the U.S.
Change the inputs, see your number
The same local model, run against your job instead of the average one.
Simulated shed installation in Portsmouth
$5,160
Likely range $2,060 – $13,060
Simulated from the same local model as the numbers above — it changes the inputs, not the pricing method.
What makes the number move
- Size and construction (resin, wood or metal)
- Slab or pad versus gravel base
- Wind-rated anchoring
- Electric service to the shed
Who issues each permit
Tracked per discipline — the building permit issuer is not always the body that reviews electrical, plumbing, zoning or fire.
| Discipline | Issuing authority |
|---|---|
| building | City of Portsmouth building departmentModeled estimate |
| electrical | City of Portsmouth building departmentModeled estimate |
| mechanical | City of Portsmouth building departmentModeled estimate |
| plumbing | City of Portsmouth building departmentModeled estimate |
| zoning | City of Portsmouth building departmentModeled estimate |
| fire | City of Portsmouth building departmentModeled estimate |
Permit requirement in Portsmouth
It depends on scope. Like-for-like cosmetic work in Portsmouth is often exempt, but a permit is required as soon as you change structure, plumbing, electrical or the building envelope.
- Permitting authority
- City of Portsmouth building departmentModeled estimate
- Permit fee
- Estimated allowance $60–$260Modeled from comparable fee schedules — not an official quoted fee.
Inspections
- Anchoring / tie-down inspection
- Final inspection
Local conditions that change this job
Only the exposures that materially affect shed installation.
Cooling load / heat exposure
Severe82/100
Humidity
Severe84/100
Named-storm exposure
High70/100
Portsmouth sits in Rockingham County, New Hampshire. Deep frost lines, snow load and a very old housing stock mean permits frequently touch structural, electrical and energy-code upgrades at once. Work outside city limits is permitted by the county building department rather than the city.
Nearby market comparison
| Market | Local factor | Median | Per shed installed |
|---|---|---|---|
| Portsmouth (this page) | x1.077 | $5,000 | $1,950 – $12,900 |
| Dover | x1.077 | $5,000 | $1,950 – $12,900 |
| Manchester | x1.110 | $5,100 | $2,000 – $13,300 |
| Lowell | x1.289 | $5,900 | $2,300 – $15,450 |
+ Had shed installation done in Portsmouth? Add what you paid or were quoted
Reports are reviewed before they count, and nothing is published until at least 5 reports exist for a market. No name, email or address is collected.
How Hometriva estimates Portsmouth shed costs
Hometriva does not publish invented city prices. The Portsmouth estimate for shed installation is produced by this chain, and every input is stored separately:
- National baseline$4,600
Typical U.S. cost for shed installation on a single-family home.
- Local labor factorx1.091
Portsmouth-area trade labor rates, weighted at 58% of this job.
- Material factorx1.055
Material and delivery pricing into Rockingham County, weighted at 42%.
- Regulatory factorx1.004
Local code, product-approval and inspection load, applied at 20% for this project type.
- Applied multiplierx1.077
Blended Portsmouth adjustment specific to shed installation.
- Permit component$60 – $260
Budgeted separately from the contract price because it is paid to the jurisdiction.
Because labor, material and regulatory factors are weighted per project, shed installation in Portsmouth carries a different local adjustment than other trades in the same market.
Reviewed by
Hometriva Cost Data Desk
Maintains the unit-cost baselines, local adjustment factors and material pricing. Reviewed for shed installation pricing in Portsmouth, NH.
- • National unit-cost baselines against current trade pricing
- • Local labor and materials factors for the market
- • Material installed-cost ranges and service life
Last reviewed August 2026 · Editorial standards · Report an error
Frequently asked questions
How long does shed installation take?
1-2 days of work, 2-5 weeks including permitting. Permit review and inspection scheduling are usually the largest source of variation.
What changes the price the most?
The largest cost drivers are size and construction (resin, wood or metal); slab or pad versus gravel base; wind-rated anchoring.
Sources
Sources & verification
Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.