Just can't get good at building?

There is a lot of good advice here and I am not a builder at all, but I can confirm that with practice there is so much room to improve. Pictures of houses and floorplans are a great place to start, as already mentioned. But also try to let your ideas and sparks of creativity take you places. For example, I once decided to make a house based on the floorplan of an apartment we once lived in. I loved the results so much in turned out ot be one of my favourite builds. Or just the other day I wanted to make a tradional looking greenhouse with the windows that came with CL. So I just went into the game, chose a rather big lot in Oasis Springs and made the greenhouse. Then I added some perfect plants, which I had saved to my gallery. And then I thought, ok, what am I going to do with this? So I started building a park around it and I really liked how it turned out with the barbecue area, playground equipement and landscaping. When I was all done I switched to one of the families in that save and the stay-at-home dad took his toddler to the park. And when I saw all the other Sims populating that park, playing on the swings, sitting down to play chess and the kids on the monkey bars ... it just made me happy. My park is not perfect and there are much better builders out there, but I made it and it works. It gave me a much better feeling than if I had downloaded a lot. Sorry for the long unhelpful post, but I am just trying to say, keep at it, it's a very rewarding experience once you figured out how to make builds you enjoy in your game. :)