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How much does window replacement cost in Duncan, OK?

Regionally adjustedUpdated Prices checked October 20262 sources

In Duncan, window replacement typically runs $3,140 to $10,820, about $6,710 for a typical job. That is the US national range from HomeAdvisor ($3,436 to $11,838) adjusted by the West South Central factor of 0.91 from the 2025 Cost vs. Value Report. Checked October 2026.

Adjusted for the West South Central region

Low
$3,140
Typical
$6,710
High
$10,820

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Window replacement cost in Duncan, OK

Each row says exactly what the figures are and where they come from.

Window replacement cost in Duncan, OK
EstimateLowTypicalHighBasisChecked
West South Central estimate$3,140$6,710$10,820National range × 0.91: the West South Central / national cost ratio for “Window Replacement | Vinyl” ($20,171 vs $22,073) in the 2025 Cost vs. Value ReportOctober 2026
US national range$3,436$7,348$11,838Per project (several windows): typical range of customer-reported projects (HomeAdvisor)October 2026

What drives the cost of window replacement

  1. Number of windows

    Per-window prices drop on larger projects.

  2. Window size and type

    Picture, bay and skylight windows cost more than standard double-hung.

  3. Glass

    Double or triple panes, Low-E coatings and gas fill add cost.

  4. Frame material and brand

    Vinyl, wood, fiberglass and aluminum frames are priced differently.

  5. Replacement or new opening

    New openings need framing and siding work.

Permits and what's included in Duncan

Permit note

Like-for-like replacements often need no permit, but new or enlarged openings usually do. Check with your building department.

Rules are set locally; confirm with Duncan’s building department.

What’s usually included

  • New windows
  • Removal of the old windows
  • Installation, flashing and sealing

Scopes vary. Get the scope in writing on every quote.

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Top-ranked window installers in Duncan

The top 3 of 13 window installers we rank for Duncan, OK, by CR Score. Paid placement never changes rank.

  1. #1
    Glass Doctor of Lawton
    CR Score 584.8from 427 Google reviews
  2. #2
    Shane Burk Glass & Mirror
    CR Score 564.5from 27 Google reviews
  3. #3
    Allied Home Improvements
    CR Score 544.4from 20 Google reviews

See all ranked window installers in Duncan

Window replacement cost in Duncan: questions

How much does window replacement cost in Duncan, OK?

In Duncan, window replacement typically runs $3,140 to $10,820, about $6,710 for a typical job. That is the US national range from HomeAdvisor ($3,436 to $11,838) adjusted by the West South Central factor of 0.91 from the 2025 Cost vs. Value Report. Checked October 2026.

Why is the Duncan price different from the national price?

The 2025 Cost vs. Value Report puts the “Window Replacement | Vinyl” project at $20,171 in the West South Central division against $22,073 nationally, a factor of 0.91. We apply that factor to the national range. It is a division-level adjustment, not a Duncan price survey.

Do I need a permit for window replacement in Duncan?

Like-for-like replacements often need no permit, but new or enlarged openings usually do. Check with your building department. Rules are set locally, so confirm with Duncan’s building department.

What affects the cost of window replacement?

Number of windows: per-window prices drop on larger projects. Window size and type: picture, bay and skylight windows cost more than standard double-hung. Glass: double or triple panes, Low-E coatings and gas fill add cost. Frame material and brand: vinyl, wood, fiberglass and aluminum frames are priced differently.

How many window installers serve Duncan?

We rank 13 window installers for Duncan, OK by CR Score. Get at least three written quotes for the same scope.

What is usually included in the price?

New windows; Removal of the old windows; Installation, flashing and sealing. Always get the scope in writing on the quote.

Sources

Checked October 2026. Figures are estimates, not quotes.

  1. HomeAdvisor: Window installation cost · page updated June 17, 2026 · checked October 2026Primary source. Used for: Low, typical and high; drivers.
  2. Journal of Light Construction: 2025 Cost vs. Value Report: Window Replacement, Vinyl · page updated 2025 · checked October 2026Used for: Regional adjustment ratio.
  3. Journal of Light Construction: 2025 Cost vs. Value Report, West South Central division · checked October 2026Used for: Regional factor 0.91 for “Window Replacement | Vinyl”.
These are published estimates with a documented regional adjustment, checked October 2026. They are not quotes. Typical range shown: $3,140 to $10,820. Editorial policy

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