How hard would this be?

[Homegrown Tomatoes]

How difficult would it be to put larger windows in a house than the ones it was built with?  Let's say the existing windows are placed between the studs... would it be easier to remove and replace those windows with larger windows, or would it be easier to open up new holes between the next studs over (assuming there is no wiring/plumbing to deal with) and put in a few more windows in a row to make it seem like a larger window?  For that matter, how difficult is it to put a window in a wall where there hasn't been one before, of course assuming no plumbing or wiring is in the way, and the house is stick built?   

[MountainDon]

Assuming the wall is load bearing, if an existing opening was made wider that would necessitate a new header above the window. That would necessitate removing wall covering (interior, exterior).

A window can be installed within a single stud bay without a header, but that does limit you to narrow windows especially if the studs are 16" OC. Enlarging the window may necessitate a taller as well as a wider header.

Then there's the matter of the exterior. The window must be flashed properly, so some of the exterior cladding must be removes around the window cut out to enable this step. Then the walls have to be repaired/refinished.

So yes, enlarging or adding windows can be done. It's a matter of time, effort and money. If you can use more of your time and effort you can save more of your money.

[Homegrown Tomatoes]

Thanks, MD.  The house we are looking at has really long, narrow windows in the bedrooms, which I really don't like.  There are two of them in each room, and it looks like they've put them in between the studs when they built, and in each case, they're on opposite walls.  I would have put at least two, maybe three in a cluster together to allow for more light (especially since they didn't put much in the way of ceiling light fixtures in the bedrooms), and I would've put them on each side of the room. Neither of the bathrooms has even a tiny window, which I don't like.... I'd rather have at least a small one for ventilation.  One of the few things I don't like about the house...replacing them would be a down the road thing, most likely after adding a sunroom to the house.