Impact Window Installation cost in Dover, NH
Dover, NH · updated August 2026
$19,900
Typical local cost
$9,700 – $45,100
Typical range
- per window installed
- $700 – $2,050
- Permit
- Yes
- Typical timeline
- 1-3 days of installation
Installed, local pricing
$130 – $610 in fees
1-3 days of installation, 3-8 weeks including product lead time and permitting
Dover runs +7% against the U.S. average · data confidence Medium · modeled estimate, not a quote
Most Dover homeowners pay around $19,900. The local adjustment for this trade is x1.073 — driven mainly by Strafford County labor rates and 100% exposure to local code requirements.
Cost by project size
Generated from the same unit pricing the calculator uses.
| Project size | Estimated range |
|---|---|
| 9 window installed | $6,300 – $18,500 |
| 12 window installed | $8,400 – $24,600 |
| 15 window installed | $10,500 – $30,800 |
| 19 window installed | $13,300 – $39,000 |
| 25 window installed | $17,500 – $51,300 |
Based on Dover pricing of $700–$2,050 per window installed.
Cost by window count and install type
Windows are priced per opening. Frame material and whether the crew does a retrofit (insert) or full-frame install drive the spread. Every row is priced against the Dover median.
| Scope | What it includes | Typical installed cost |
|---|---|---|
| 5 windows — retrofit | Insert into sound existing frames, vinyl | $7,000 – $10,000 |
| 10 windows — retrofit | Typical partial-home replacement | $13,900 – $18,900 |
| 15 windows — mixed | Most of a single-family home | $19,900 – $26,900 |
| 20 windows — full-frame | Whole-home, frames and trim replaced | $26,900 – $36,800 |
| 10 windows — impact / structural | Impact-rated or egress-corrected openings | $22,900 – $31,800 |
- • Retrofit inserts keep the existing frame and cost less; full-frame replacement is required once the frame or sill is rotted or the opening is being resized.
- • Rough-opening changes and egress corrections turn a window job into a permitted structural job.
- • Frame material sets the floor: vinyl is the value option, fiberglass and clad-wood carry a premium, aluminum is mostly a warm-climate product.
- • In wind-borne debris regions the glazing package, not the frame, is the biggest single line item.
Basis: Each scope is priced as a multiple of the modeled Dover median for impact window installation, so the scenarios, the size table and the calculator always agree. · Hometriva methodology
Cost by material
Installed cost in this market, with expected service life.
| Material | Installed range | Lifespan | Maintenance |
|---|---|---|---|
| Aluminum Impact Windows | $22,900 – $37,800 | 30–40 yrs | Low |
Where the money goes
- Labor
- $7,600
- 37% of median
- Materials
- $12,300
- 61% of median
- Permit & fees
- $370
- 2% of median
Dover project costs+7% vs U.S. average
Based on Strafford 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 Dover building department
03
Materials & staging
Order lead time on non-stock materials
04
Installation
1-3 days of installation, 3-8 weeks including product lead time and permitting
05
Inspection
Window buck / opening inspection, Installation and attachment, Final inspection
06
Closeout
Final sign-off, warranty and documentation
Dover labor intelligence
What the trade charges here, and how much of your price it is.
Loaded hourly rate
$65–$85
Exterior crews in Strafford County · +9% vs U.S. ($68/hr)
Typical crew
3 × 4.5 days
On-site time for a typical impact windows job here.
Labor in the price
$7,600
38% of the median — the rest is material, disposal and permit.
Because labor is 38% of this job, Dover 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 exterior crew rates adjusted by the Strafford County labor factor (x1.091). · BLS Occupational Employment and Wage Statistics, Hometriva methodology
Why Dover differs from the national average
The local delta, broken into dollars by driver.
Trade labor rates+$650
Strafford County crews price 9% above the national average, and labor is 38% of this job.
Material and delivery+$625
Materials are nationally traded, so they move less — but delivery into this market runs 5% over baseline.
Code and inspection load+$75
Impact Window Installation carries 100% exposure to local code requirements, and this jurisdiction's review load indexes at x1.00.
Permit fees-$50
Fees are paid to the jurisdiction, not the contractor, and are budgeted separately from the contract price.
Basis: Decomposition of the modeled Dover median against the U.S. median for this scope. · City of Dover building department, Hometriva methodology
Dover 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 impact window installation in Dover
$20,270
Likely range $10,070 – $45,470
Simulated from the same local model as the numbers above — it changes the inputs, not the pricing method.
What makes the number move
- Number and size of openings
- Design pressure rating required for your wind zone
- Aluminum versus vinyl frames
- HVHZ product approval requirements in Miami-Dade and Broward
- Stucco and drywall patching after installation
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 Dover building departmentModeled estimate |
| electrical | City of Dover building departmentModeled estimate |
| mechanical | City of Dover building departmentModeled estimate |
| plumbing | City of Dover building departmentModeled estimate |
| zoning | City of Dover building departmentModeled estimate |
| fire | City of Dover building departmentModeled estimate |
Permit requirement in Dover
Yes — a permit is required for impact window installation in Dover, NH. The work must be inspected before it can be closed out, and a licensed contractor generally has to pull the permit.
- Permitting authority
- City of Dover building departmentModeled estimate
- Permit fee
- Estimated allowance $130–$610Modeled from comparable fee schedules — not an official quoted fee.
Inspections
- Window buck / opening inspection
- Installation and attachment
- Final inspection
Local conditions that change this job
Only the exposures that materially affect impact window installation.
Design wind speed exposure
High70/100
Named-storm exposure
High70/100
Coastal / salt-air exposure
Moderate45/100
Dover sits in Strafford 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.
Owner-occupied homes
0%
Owner-occupied share of the housing stock, which drives how much of this work is homeowner-funded versus landlord-funded.
Households in market
13,096
Approximate household count in Dover, used to size the contractor pool for this trade.
Permit activity index
x0.87
Relative permit volume and fee load versus the national baseline.
Nearby market comparison
| Market | Local factor | Median | Per window installed |
|---|---|---|---|
| Dover (this page) | x1.073 | $19,900 | $700 – $2,050 |
| Manchester | x1.115 | $20,600 | $700 – $2,100 |
| Nashua | x1.115 | $20,600 | $700 – $2,100 |
| Concord | x1.073 | $19,900 | $700 – $2,050 |
What Dover homeowners actually paid
Real reported invoices from this market, aggregated. Add yours — it takes 20 seconds and no personal details.
Quotes homeowners were given in Dover
Quotes run ahead of final invoices. Reporting yours shows the local spread and where there is room to negotiate.
How Hometriva estimates Dover impact windows costs
Hometriva does not publish invented city prices. The Dover estimate for impact window installation is produced by this chain, and every input is stored separately:
- National baseline$18,500
Typical U.S. cost for impact window installation on a single-family home.
- Local labor factorx1.091
Dover-area trade labor rates, weighted at 38% of this job.
- Material factorx1.055
Material and delivery pricing into Strafford County, weighted at 62%.
- Regulatory factorx1.004
Local code, product-approval and inspection load, applied at 100% for this project type.
- Applied multiplierx1.073
Blended Dover adjustment specific to impact window installation.
- Permit component$130 – $610
Budgeted separately from the contract price because it is paid to the jurisdiction.
Because labor, material and regulatory factors are weighted per project, impact window installation in Dover 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 impact window installation pricing in Dover, 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
Do impact windows need a permit in Florida?
Yes. Replacing a window changes an opening protection assembly, so every Florida jurisdiction requires a permit with product approval numbers and attachment details for each unit.
Do impact windows lower insurance?
Florida requires insurers to offer wind mitigation discounts for approved opening protection. Have a wind mitigation inspection done after installation so the credit is applied.
Sources
Sources & verification
Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.