Impact Window Installation cost in Great Falls, MT
Great Falls, MT · updated August 2026
$18,800
Typical local cost
$9,200 – $42,700
Typical range
- per window installed
- $650 – $1,950
- Permit
- Yes
- Typical timeline
- 1-3 days of installation
Installed, local pricing
$130 – $615 in fees
1-3 days of installation, 3-8 weeks including product lead time and permitting
Great Falls runs +2% against the U.S. average · data confidence Medium · modeled estimate, not a quote
The modeled midpoint for Great Falls is $18,800. The local adjustment for this trade is x1.017 — driven mainly by Cascade 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 | $5,900 – $17,600 |
| 12 window installed | $7,800 – $23,400 |
| 15 window installed | $9,800 – $29,300 |
| 19 window installed | $12,400 – $37,100 |
| 25 window installed | $16,300 – $48,800 |
Based on Great Falls pricing of $650–$1,950 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 Great Falls median.
| Scope | What it includes | Typical installed cost |
|---|---|---|
| 5 windows — retrofit | Insert into sound existing frames, vinyl | $6,600 – $9,400 |
| 10 windows — retrofit | Typical partial-home replacement | $13,200 – $17,900 |
| 15 windows — mixed | Most of a single-family home | $18,800 – $25,400 |
| 20 windows — full-frame | Whole-home, frames and trim replaced | $25,400 – $34,800 |
| 10 windows — impact / structural | Impact-rated or egress-corrected openings | $21,600 – $30,100 |
- • 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 Great Falls 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 | $21,600 – $35,700 | 30–40 yrs | Low |
Where the money goes
- Labor
- $7,100
- 37% of median
- Materials
- $11,700
- 61% of median
- Permit & fees
- $375
- 2% of median
Great Falls project costs+2% vs U.S. average
Based on Cascade 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 Great Falls 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
Great Falls labor intelligence
What the trade charges here, and how much of your price it is.
Loaded hourly rate
$60–$78
Exterior crews in Cascade County · 0% 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
$7,100
38% of the median — the rest is material, disposal and permit.
Because labor is 38% of this job, Great Falls 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 Cascade County labor factor (x1.000). · BLS Occupational Employment and Wage Statistics, Hometriva methodology
Why Great Falls differs from the national average
The local delta, broken into dollars by driver.
Material and delivery+$175
Materials are nationally traded, so they move less — but delivery into this market runs 2% over baseline.
Code and inspection load+$125
Impact Window Installation carries 100% exposure to local code requirements, and this jurisdiction's review load indexes at x1.01.
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 Great Falls median against the U.S. median for this scope. · City of Great Falls building department, Hometriva methodology
Great Falls vs Montana 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 Great Falls
$19,175
Likely range $9,575 – $43,075
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
- 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 Great Falls building departmentModeled estimate |
| electrical | City of Great Falls building departmentModeled estimate |
| mechanical | City of Great Falls building departmentModeled estimate |
| plumbing | City of Great Falls building departmentModeled estimate |
| zoning | City of Great Falls building departmentModeled estimate |
| fire | City of Great Falls building departmentModeled estimate |
Permit requirement in Great Falls
Yes — a permit is required for impact window installation in Great Falls, MT. 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 Great Falls building departmentModeled estimate
- Permit fee
- Estimated allowance $130–$615Modeled 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
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
24,177
Approximate household count in Great Falls, used to size the contractor pool for this trade.
Permit activity index
x0.88
Relative permit volume and fee load versus the national baseline.
Nearby market comparison
What Great Falls homeowners actually paid
Homeowner-reported invoices for this market. Nothing is published until enough reports clear review, so this section is often empty in newer markets — adding yours takes 20 seconds and no personal details.
Quotes homeowners were given in Great Falls
Quotes run ahead of final invoices. Reporting yours shows the local spread and where there is room to negotiate.
How Hometriva estimates Great Falls impact windows costs
Hometriva does not publish invented city prices. The Great Falls 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 factorx1.000
Great Falls-area trade labor rates, weighted at 38% of this job.
- Material factorx1.016
Material and delivery pricing into Cascade County, weighted at 62%.
- Regulatory factorx1.007
Local code, product-approval and inspection load, applied at 100% for this project type.
- Applied multiplierx1.017
Blended Great Falls adjustment specific to impact window installation.
- Permit component$130 – $615
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 Great Falls 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 Great Falls, MT.
- • 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 I need a permit for impact window installation in Great Falls, MT?
In most jurisdictions this work is permitted and inspected. Requirements are set locally, so confirm the current application and inspection checklist with your building department before work starts.
How long does impact window installation take?
1-3 days of installation, 3-8 weeks including product lead time and permitting. Permit review and inspection scheduling are usually the largest source of variation.
What changes the price the most?
The largest cost drivers are number and size of openings; design pressure rating required for your wind zone; aluminum versus vinyl frames.
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.