You want to keep the same size as the width of the windows goes, this way you don't have to change the header which will be a more evasive framing modification and you will need a building permit and submit drawing for approval indication new header size.

With 8' ceilings, you can order 5' tall windows it will give you lots of light and they will look really nice, not to mention you don't have to change the header all you have to do is bring existing window sill down to get the right opening.

If you decide to use windows on the garage side wall where the door is, use the same height windows on the garage side but you can use a picture window or a triple one because you have enough room on that wall.

5' tall window will give you about 23" from the floor to the bottom of the window on the inside. If you want the windows higher on the interior and have more wall space bellow size the height of the window to get the needed height from the floor.

Good luck

I don't think they make a single dbl hung window 54" wide because it would make the sash very heavy. Being this the front of the house all windows should match and the wall where the existing garage door is right now, if you use 1 mullion window, it will get lost on that wall, not to mention not having windows on the front of the garage, with all the surrounding trees you want to get inside as much of natural light as you can get.

I would probably do something like this, and also remove that railing, it looks out of place when you have a ground level entry.

Good luck.

What rooms are those windows in? Lowering windows in bedrooms sometimes cause all sorts of problems with furniture placement. I like the drawing above with the windows all the same size it will help hide the fact that is a garage conversion.Lose the shutters of course and no mullions in the windows please.

You have what appears to be slider now correct?

They look like sliders or casements.

Looks to me like sliders GN as the sash appear to be a different planes and screens exterior on one side only. 2-wide double hungs would be my choice. Just be certain you don't make them too tall that you ruin your interior wall space.

The front windows are crank currently - from 1962 and the wood is not in good shape. Current size isn't terrible but I would prefer rectangle over square-ish.

The railing is already gone - it went in the very first dumpster I had. The shutters are also gone right now.

I would love a wall of windows in the garage conversion but budget doesn't allow for all my wants. Can I do 3 large windows but keeping the top and bottom in line with the front of the house? Yeah, I better four is better. The opposite wall in the converted garage will mirror this one and face our patio/side yard. As well as provide a great cross breeze. The room will be used for working out and TV viewing. What approximate size do you suppose the windows are in the drawing above from GN Builders? I'm generally not so slow to pull the trigger on decisions but the windows really have me nervous to make a long term mistake.

The windows on the front of the house are bedrooms. There actually is a step up into the house. The room on the end will be converted to mudroom/laundry room with a very large attached garage going up at that end of the house.

And here I thought picking new windows would be so fun! Thank you all for your advice! It's greatly appreciated!

GN Builders L.L.C suggestion of longer windows of the same width is the solution.

At least where you can use them; however, if, for any reason longer windows might be a problem (kitchen, bathroom, laundry, garage w/built in storage) but you do want to let in more light, you might consider some kind of "bay" window such as a "greenhouse" variety bump out with glass top.

ptreckel - thank you for your suggestions! Those will be addressed next year. One project at a time. :)

GN Builders - thanks so much for the sketch. To save on some costs - I know, don't skimp on windows - I was considering keeping the window width the same on the front two (total is 52" each and that's the largest they make) as one single double hung rather than two a little wider at 28" and then add three centered in the garage opening, each of the three the same size as the windows on the front of the house. Reason being, that's one large room and from the interior I feel like centering those windows would work out better. The wall opposite in the converted garage would have the same run of windows.

appreciate your suggestions!

For you and others to understand a design its necessary to draw it in addition to describing it.

oh, if only I could draw it, I'd love to provide that. If I could draw it, I could better make the decision. I may need to consult a professional.