Go to Houzz PHOTOS. Enter "driveway gate" in the search box. Be sure to use quotation marks on search terms. There are more than 700 photos in this category.

x2 what Dytecture said, this is not enough to go on. Most important thing before you do anything, is you need to know lot restrictions in that area and what are the zoning requirements, i.e. side, rear,front, set-backs. In addition the size of your house will also depend on the total percentage of a lot that can be covered by impervious surfaces (structures, decks, and surfaces likes asphalt or concrete driveways etc, which reduce natural infiltration, etc and after you obtain that information, only then you can contact a local Architect and you can roughly come up with the size of your house and layout on the lot... until that, the information you get here it will be useless to you in your case and a waste of time for everyone else. With that said, 40x104 is not a confirming lot for most of the area around here and you will need variances because confirming lot sizes usually start at 50x100, unless you in a section where ordinances permit residential cluster development. Good luck.

This is a most unusual and interesting structure. I would not have been sure it was a house from the picture. Pameladunson and I are in agreement that the strong visual difference between the rather utilitarian-looking "guard" at the roof and the more decorative fence/gate in front isn't visually pleasing. Both should be from the same architectural design family, although they need not be identical. The windows appear to have quite a bit of small architectural detail as best I can make out from the photo. The railing in front seems to have a scale that is better relative to those window details than does the "guard" at the roof, so I would probably opt for changing the roof "guard", not the railing in front. If do-able dollar-wise, It might be even better to remove both the roof "guard" and the railing/gate in front and design something new for these areas that is a good match with the most striking details elsewhere on the house.

As far as spacing between the pavers, you want a minimum of 3mm or ⅛ an inch, but the ideal spacing really depends on the whole space and how you want to fill the space between pavers. If you are thinking about pea gravel or sand, you probably want less space between to help keep your costs down and make it easier to power wash. If you are looking to add greenery then more space between the pavers gives you more green, creating a more natural-looking space. If you do decide to go the gravel route, you can apply a clear coat of something like gravel-lok. It acts like glue, keeping the gravel in place. It may not be able to take the full force of a power washing, but it will certainly hold the gravel in place better than not having gravel-lok. If you do want to go for a green option, grass could work, You could also look into small succulents, moss, or clover. With any green option, you will have a little more maintenance in the form of trimming and watering, but the look is stunning! You absolutely can put grass between the pavers. It will actually help stabilize and hold the pavers not move them. (if installed correctly) I would space it 4” apart and use netfin or a similar subsurface drip line to water the grass underneath the soil. This look is probably my favorite but you could also use a crushed aggregate in between too. Gravel is a terrible idea because it doesn’t stay in place. Here are some ideas from our projects of all kinds of paver designs: