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Colorado window permits · Denver Metro

Colorado window replacement permits & energy code guide.

Window and door rules change from one Colorado city or town to the next. We confirm the governing jurisdiction, whether your project needs a permit, the energy code the new glass has to meet and any egress or safety-glazing requirement before a single window is ordered.

Important: Colorado does not use one statewide building code for every window project. Local governments adopt different editions of the residential and energy codes and may add their own amendments. The property address, not just the mailing city, determines the authority having jurisdiction, and it decides whether a like-for-like replacement needs a permit at all.

Compliance checked before anything is ordered

We confirm what applies to the actual property before windows are ordered or the crew is scheduled.

  1. 1
    Identify the jurisdiction

    We confirm whether the city, the county or a regional department has authority over the address, and whether the home sits in a historic district or under an HOA with its own review.

  2. 2
    Check the permit trigger

    Many jurisdictions treat a same-size replacement window differently from a new or enlarged opening. We check which one your project is and pull the permit when one is required.

  3. 3
    Match the energy code and safety rules

    The new units are ordered to meet the energy code edition and the glazing and egress rules the jurisdiction has adopted, with the certified ratings on the label.

  4. 4
    Document and close out

    We keep the product labels and photos, coordinate any required inspection, and hand you the paperwork with the warranty registration.

What gets reviewed on a Colorado window replacement

The exact requirement depends on the adopted code edition and local amendments. These are the items our team reviews before the order.

Permit requirement

Whether the project is a like-for-like replacement, a new opening or an enlarged one, and what the jurisdiction requires for each.

Energy code ratings

The U-factor and solar heat gain ratings the adopted energy code sets for windows and doors in this climate zone, confirmed on the certified label of every unit.

Egress in sleeping rooms

A bedroom window that serves as an emergency exit has minimum opening sizes and a maximum sill height; a replacement must not reduce what the code requires.

Safety glazing

Tempered or laminated glass where the code calls for it: in and beside doors, near tubs and showers, close to the floor, and in large panes.

Flashing and water management

Sill pans, flashing tape and the integration with the house wrap or existing weather barrier, so water never gets behind the frame.

Structure at the opening

A new or enlarged opening needs a header sized for the load above it; a like-for-like replacement is checked for rot and a sound rough opening.

Ventilation and light

Habitable rooms need a minimum of operable window area and natural light; the replacement style must keep it.

Lead-safe work on older homes

Homes built before lead paint was banned need lead-safe practices when the old frames are disturbed.

Historic districts and HOAs

Separate approvals may apply in historic districts, HOAs, metro districts or communities with design standards, often on style, grid pattern and exterior color.

Inspections and paperwork

Any required inspection, the product labels the inspector asks to see, and the documentation you keep for the warranty and a future sale.

Find your Colorado municipality

Search the statewide list. Each link opens that municipality’s own government site, where the current building department, permit portal, adopted code and amendments can be confirmed at the source.

272 of 272 municipalities

Colorado window permit FAQs

Does Colorado have one statewide code for windows?

No. Building and energy codes are adopted and enforced locally. The requirements that apply come from the authority having jurisdiction, its adopted code edition and its local amendments.

Do I need a permit to replace my windows?

It depends on the jurisdiction and on the project. A same-size replacement is treated differently from a new or enlarged opening in many places, and some require a permit for both. We check before anything is ordered.

What is a U-factor and why does it matter?

It is the rating on the window label that describes how well the unit resists heat flow; a lower number insulates better. The adopted energy code sets the limit for this climate zone, and the certified label is how the inspector and you can see the unit meets it.

My basement bedroom window is small. Can I replace it with the same size?

A bedroom window that serves as the emergency exit has to meet the egress rules the jurisdiction adopted. A like-for-like swap may not be enough, and an enlarged opening changes the permit picture. We look at it before quoting.

Which windows need tempered glass?

Glass in and beside doors, near tubs and showers, close to the floor and in large panes generally needs safety glazing. The exact locations come from the adopted code, and the new units are ordered to match.

Do you pull the permit, or do I?

Send us the address and we confirm who has authority over it and what that jurisdiction requires before anything is ordered or scheduled.

Informational notice: This page is a general educational resource. It is not a substitute for the current requirements of the authority having jurisdiction, approved construction documents, engineering, manufacturer instructions or professional legal advice. Codes, amendments, fees, licensing and inspection requirements can change without notice, and requirements must be verified for the specific property and scope before work begins. Municipal links are maintained by third parties. Directory source: the Colorado Municipal League municipal website directory. Last page review: September 30, 2026.

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