The shape:
- The shape of your house isn't a simple L- or T-shape, which is good, however, you seem to heavily base yourself on the +-shape. A rule of thumb is that if you can name a shape, it can be improved.
- It's good to see several overhangs, but it could be an idea to place them in positions which makes the second floor's shape different from the first to add some extra variation to the house. Right now all your overhangs simply extend along the direction of the A-frames, see if you can make them extend in other directions as well.
- The shape of your roof as alright, although a bit uniform IMHO. It would be possible to lower the height of the side-wings.
- Your roof is very plain and lacks features. Perhaps an attic window could work well?
- Your windows are placed very systematically and strictly according to a grid. I'd highly suggest you move the windows around to beak up your patterns here to get a more chaotic and unpredictable look.
- Your window sizes seems to be mostly 2*2, you could try some more variated sizes for extra variety.
- Your 1*2 window has only shutters one one side, that's always nice to see! (Extra note, not all windows needs shutters, the ones that never faces the sun, for one, doesn't)
Materials:
- The use of redwood framework isn't something I've seen a lot of. Usually people go with oak or spruce, but I would assume that your frame will work alright
- You seem to have many horizontal logs in your walls which cut straight through all your windows. I'd suggest that you stay clear of this; instead, try more vertical and diagonal lines.
- You base your walls on sand and sand alone, you could add extra sand-based materials to get more details and patterns into your walls.
- Instead of adding a log frame on the sides of all windows, see if you can variate that some more; in many cases it looks better to not have a log frame around the windows.
- You have some logs in the frame which connects awkwardly at all of the corners of your house.
- Your supports that holds up the overhangs doesn't match with the framework; see if you can use a more fitting material that doesn't stand out as much as the current one does.
Decorations:
Truth be told, there's not a whole lot to comment on here, simply because there's not many decorations on the house. You have some flowerpots, which is good, but that's about it...
- The flowerpots outside the windows seems a bit silly, IMHO. Consider replacing them with flowerbeds instead, or try to rework the "platforms" the flowerpots stands on to look more interesting.
Here's some suggestions:
- Chimney, a good house will become better with a fireplace!
- Various forms of vegetation; having some vines (though it would be best to avoid the vine block) hanging around really, really improves things.
- Anything that makes the outside more lively! Give the house some personality!
Garden:
Good to see some effort being put into the garden; it's often an overlooked part of a home and really helps improve the house.
- Good to see a pond which has an irregular shape.
- The amount of grass seems to be alright, but IMHO it's on the upper limit of acceptable.
- Try to get a better spread of the flowers, it seems you've grouped them all on one side of the house.
- The furniture seems a bit too simple and it's just randomly placed down on the ground. What about adding some "platform" to put the furniture on, so it doesn't sit on bare grass?
- Cobblestone wall around the garden? IMHO, that's a sub-optimal solution. Perhaps you should consider replacing it with something else?
Other:
- The door that leads to the garden is located right next to a corner of the house, which is something I've never seem pulled off in a good way. I would suggest you relocate that door.
- Torches placed on the ground? Only temporarily, I hope. Otherwise, that's a big no-no.
- Your entrance looks very plain and boring. Consider adding some extra details around it.