Exterior Window Trim Ideas: See New Trim Around Your Own Windows

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Window trim frames every window on the front of a house, so a wider board, a new header or a new color can change the whole look. Upload a photo of your house below to try new trim on it, then see what published guides suggest and three before and after examples on stand-in houses.

Trim color ideas

Before and after examples

Example images are AI-generated: both the sample houses and their redesigns. Results change from render to render, so treat them as concepts, not exact product matches.

AI-drawn stand-in of a plain two-story house seen straight on, with tan vinyl lap siding, a gray shingle roof, two double windows upstairs and two windows downstairs with narrow white trim, and a brown front door under a small hood — Example 1 (prompt 1 below; the before is an AI-drawn stand-in house, not a real photo): the two lower windows now have wide flat white trim boards with a deeper sill board, which is the craftsman look the prompt asked for. The windows already had narrow white trim in the before. Not followed: the two upper windows got only slightly wider trim, and the thicker header board that sticks out past the sides is not clearly visible on any window. The windows, the tan siding, the brown door and its small hood, the roof, the lawn and the path stayed the same.

The same house with wide flat white trim and deeper sills around the two lower windows and slightly wider white trim on the upper windows; siding, door and roof kept — Example 1 (prompt 1 below; the before is an AI-drawn stand-in house, not a real photo): the two lower windows now have wide flat white trim boards with a deeper sill board, which is the craftsman look the prompt asked for. The windows already had narrow white trim in the before. Not followed: the two upper windows got only slightly wider trim, and the thicker header board that sticks out past the sides is not clearly visible on any window. The windows, the tan siding, the brown door and its small hood, the roof, the lawn and the path stayed the same.

AI-drawn stand-in of a one-story house with smooth beige stucco walls, a terracotta tile roof, two dark bronze framed windows with no trim around them, a dark wood front door, and a gravel yard with desert plants — Example 2 (prompt 2 below; the before is an AI-drawn stand-in house, not a real photo): each window now has a raised off-white band around it and a deeper pale sill below it, replacing the thin dark sill it had before. The before has two windows, though the prompt said three. The bronze window frames, the beige stucco walls, the tile roof, the dark wood door, the wall lights, the gravel yard and the plants stayed the same.

The same stucco house with a raised off-white band and a deeper pale sill around each of the two windows; walls, roof, door, gravel and plants kept — Example 2 (prompt 2 below; the before is an AI-drawn stand-in house, not a real photo): each window now has a raised off-white band around it and a deeper pale sill below it, replacing the thin dark sill it had before. The before has two windows, though the prompt said three. The bronze window frames, the beige stucco walls, the tile roof, the dark wood door, the wall lights, the gravel yard and the plants stayed the same.

AI-drawn stand-in of a two-story red brick colonial house with two chimneys, a gray shingle roof, nine white-framed windows with thin orange-brown trim, a black front door in a white surround, boxwood shrubs and a brick path — Example 3 (prompt 3 below; the before is an AI-drawn stand-in house, not a real photo): the orange-brown trim on every window is now white, and the four lower windows have decorative white crown headers above them. The house has nine windows, though the prompt said six, and the model changed all nine. Not followed: the five upper windows got white trim with a flat white top band but no clear projecting cap. The white door surround was already white in the before. The red brick, the black front door, the roof, the chimneys, the shrubs, the lawn and the brick path stayed the same.

The same brick house with white trim on every window and decorative white crown headers over the four lower windows; brick, door, roof, shrubs and path kept — Example 3 (prompt 3 below; the before is an AI-drawn stand-in house, not a real photo): the orange-brown trim on every window is now white, and the four lower windows have decorative white crown headers above them. The house has nine windows, though the prompt said six, and the model changed all nine. Not followed: the five upper windows got white trim with a flat white top band but no clear projecting cap. The white door surround was already white in the before. The red brick, the black front door, the roof, the chimneys, the shrubs, the lawn and the brick path stayed the same.

What the AI can and cannot do

It can draw wider trim, a new surround, a header or a new trim color around the windows in your photo and keep the rest of the house, so you can see the look on your own front.

It cannot show the exact size, profile or material of a trim product, and it may not treat every window the same, as the captions say. Treat each result as a direction to check with a contractor or a real sample.

What published guides suggest for window trim

These points come from Fixr, LP Building Solutions, Allura USA, Magic Window, Brick&Batten and Hunker, on exterior window trim ideas. The table is our own summary of the ideas they share, not a quote from any one of them. Some of these companies sell trim or siding, and they are design opinions, not rules.

Idea	Summary
Contrast	White trim on a darker body, or black trim on a white or light body, to make the windows stand out.
Monochrome or tonal	Trim the same color as the body, or a shade lighter or darker, for a quieter, modern look.
Craftsman	Wide flat boards with a thicker header across the top and a deeper sill.
Headers and crowns	A decorative header or crown over each window adds a traditional look, often on colonial or brick houses.
Materials	Wood, PVC and composite trim, and stucco or foam surrounds on stucco walls.
Fit the house	Match the trim width and style to the house style, and keep it the same on every window of the front.

Where this page sits among the trim pages

This page is about the shape and width of the trim around your windows. For trim color on its own, see exterior trim colors, and for shutters beside the windows, see shutter colors. For a high-contrast look, see white house with black trim.

Three window trim looks to try

The examples were run directly on an image model, not through the tool above, so your results will look different.

Wide craftsman trim. Example 1 adds wide flat white boards and deeper sills to a plain sided house.
Stucco surrounds. Example 2 adds a raised off-white band around the windows of a stucco house.
White trim and crown headers on brick. Example 3 swaps brown trim for white and adds crown headers to a brick colonial.

How to try it on your house

Photograph the front in daylight, straight on, close enough that the windows are clear and far enough back that the whole front fits in the frame.
Upload it in the tool at the top of this page, or open the exterior designer, and describe the trim: its width, color, header and sill.
Say what stays. List the windows, the siding or brick, the door and the roof to keep, as the prompts below do.
Check every window. Make sure each one got the same trim, and run it again if some did not.

The exact prompts behind the examples

These are the edit prompts used for the three examples, word for word. Change the trim and the list of what stays to suit your house.

Prompt 1: wide craftsman trim

Change ONLY the trim around the four windows: add wide flat white trim boards around every window, with a thicker flat header board across the top that sticks out past the sides, and a deeper sill board at the bottom, in a simple craftsman style. Keep the windows themselves, the tan siding, the front door, the roof, the lawn, the path, the sky and the camera angle exactly the same.

Prompt 2: raised stucco surrounds

Change ONLY the window surrounds: add a raised flat stucco band about a hand wide around each of the three windows, painted an off-white, with a slightly deeper sill below each window. Keep the windows, the beige stucco walls, the roof, the front door, the gravel yard, the plants, the sky and the camera angle exactly the same.

Prompt 3: white trim and crown headers on brick

Change ONLY the trim around the six windows: replace the thin brown trim with white trim, and add a white decorative crown header above each window, a flat band with a small projecting cap on top. Keep the windows, the red brick, the black front door, the roof, the shrubs, the lawn, the path, the sky and the camera angle exactly the same.

Before you change your trim

Measure the space. Wider trim needs room between windows and at the corners, so check that it fits.
Ask about water. New trim and sills must shed water, so ask a contractor how it will be flashed and sealed.
Check your HOA. Some neighborhoods limit trim colors and styles.

Who this is for

Homeowners who want to see wider trim, a new surround or a new trim color around their windows before they hire anyone, and contractors who want to show a client the idea on their own house.

More trim and exterior ideas

See exterior trim colors, shutter colors, craftsman house exterior colors, stucco house colors, ways to update a house exterior and the home exterior visualizer.

Frequently asked questions

What is exterior window trim?

Exterior window trim, also called casing, is the boards or band around the outside of a window. It covers the gap between the window and the wall and frames the window. It can include a header across the top and a sill at the bottom.

What color should exterior window trim be?

The guides cited on this page describe three approaches: contrast, such as white trim on a darker body or black trim on a light one; monochrome, with the trim the same color as the body; and tonal, a shade lighter or darker than the body. White is the most common. For color alone, see the exterior trim colors page.

How wide should window trim be?

It depends on the style. Craftsman houses often have wide flat boards with a thicker header, while modern houses may have thin or no visible trim. Example 1 above shows wide flat trim on a plain house.

What can I use for trim on a stucco or brick house?

Stucco houses often have a raised stucco band or foam surround painted to stand out a little from the wall, as in Example 2. Brick houses often have painted wood or PVC trim and sometimes a header or a stone or brick sill, as in Example 3.

What materials is window trim made of?

The guides mention wood, PVC and composite or engineered wood trim, and foam or stucco surrounds on stucco walls. A render does not show the material, so ask a contractor which suits your climate and walls.

Will the AI change only the trim?

Usually, but it may not follow the prompt exactly. In our examples the model gave the upper windows less trim than the lower ones and did not clearly draw a projecting header. Name each window and what stays, and compare the before and after closely.

Is this tool free?

Signing up is free and gives you 5 credits, which is enough for 2 renders in most countries. Free renders carry an AiExterior watermark. If you want more renders or clean images, paid plans are available on the pricing page.

Do I need an account?

Yes. You need to sign in before a render starts, with an email code or your Google account.

Try it on your own house

Upload your house photo

Free sign-up with email or Google. You get 2 free renders in most countries; free renders are watermarked.