I think what bothers me the most is too many textures- you have a natural stone retaining wall, concrete stairs going to wooden stairs, wrought iron hand rails, wooden columns and vinyl siding. When things are so mis-matchy it makes your eye jump from one element to the next. I like to use repeating elements, it's more 'restful' looking.
Since the concrete stairs would be such a pain to replace I would focus on trying to make them blend with the wooden stairs better. There are many ways you can do this- you can add wooden tread to the concrete stairs (probably will need repaired first,) you can add stone tile to both the wood and concrete stairs (and porch, too,) you could paint the concrete to match the wooden stairs (this would be the quickest fix but painted concrete tends to chip and look horrible!) or maybe add concrete treads to the wood stairs and do all the vertical pieces in stone. The possibilities are endless depending on your skill level if you're doing it yourself, budget, timeframe, etc. Do a google search and hit images to get inspired. Next I would replace the retaining wall- the natural stone looks a little sloppy for a house with such clean lines. Choose a retaining wall that complements your stairs, try to repeat the color, texture, shape and/or material used so they match.
I don't hate the trees but maybe theres a reason they need to go? How about a floating stepping stone pathway from the car area to the stairs with mulch around and a few green plants scattered about. This house has a lot of sharp lines and a few plants will 'soften' the look just a bit.
The wrought iron handrails tend to fade into the background- I would replace them with thicker wooden handrails for a bolder statement and paint them to match the trim. Personally I really like white trim because it 'pops' against the color but that’s your choice. I would paint the door a different color too, it looks like a shadow. You need three colors- a base color for the house, another for the trim and an accent color. The accent color is what really grabs your attention. Google ‘green house, red door’ and click images to see what I mean.
Personally I’m not crazy about the ‘sea foam green’ as a base color. It’s too much of a ‘pastel’ color which makes me think of little old ladies wearing polyester pants. I like more modern colors like a deeper sage green. That’s my personal preference but depending on the climate and what colors the other houses in the neighborhood are it may just right as is.
Then just a few little things. Create a false panel to hide the recycling bins- you can buy ready made ones or make your own. http://diy-alternative-energy.com/15-best-looking-ways-hide-trash-cans-frugal-fabulous/ Change out the light fixture for something more decorative. Bold new hardware to match your light fixture. You can make the house numbers bolder too (they shouldn’t look like they came off the rack at Walmart!!) https://www.pinterest.com/search/pins/?q=house%20numbers&rs=typed&0=house%7Ctyped&1=numbers%7Ctyped
Good luck and can’t wait to see the before and after pictures!
(I want to clarify something- at the beginning of my post I said you shouldn’t mix textures. It’s okay to use different textures as accents like having a wrought iron light fixture and door hardware. You just don’t want 20% stone, 20% concrete, 20% whatever, etc. Not enough continuity.)
