The Sunset garden books are ideal for your situation and have many wonderful versions full of great ideas in pictures.

taterville, Things are coming along very nicely. I bet when you were in school you were one of those students that always did your homework; I never did mine. lol Most of your measurements worked fine, but something went wrong with the measurement of point A. That's my fault, not yours; my instructions were not adequate for the task. As we go along, there will be times when you need to mark a place on the ground in a semi-permanent way. Any number of things can be used; stakes, tent pegs, or nails with a ribbon attached. Now let me revisit the location of point A. You will need to place a marker at point A that is at the bottom toe of the slope about mid way in the curved transition between the relative straight line of the toe running behind your house and the straight line of the toe running along the side of your house. Begin at point A and measure along a line parallel to the back of your house to a point that aligns with the back of your house, shown in my graphic as point B. Earlier you gave that distance as 4ft 11 inches. That may have been correct, but because we may now be starting from a new location for A, you will need to repeat this measurement. Now go back to point A and measure parallel to the side of your house to a point that aligns with the back corner of your house shown as point C. Think of the box defined by the the three points and the back corner of your house as a rectangle. It is the width and length of this rectangle we seek. You did not give a distance from point E to F and I assume that the slope is just too long and slick to make the measurement. That's OK, there are other ways to find the location of point F. I'll prepare some instructions on how to go about it. You are getting close to providing the data needed to produce a base map defining the terrain you have. It wont have the precision of that of a professional, but is certainly suitable for planning purposes. The precision can be improved as needed. Taking what can be used from your photos, the survey, and the measurements requested by yardvaark and myself, I have made a drawing. Contours shown are at 1 ft intervals. Scale, small squares equal 2ft. I will add to and make corrections as additional data comes in. Below is a thumbnail. The full sized drawing Is in the optional link. I would invite everyone to use any of the graphics I provide to convey your ideas for the site. Here is a link that might be useful:

We have 12' x 28' yard space between our back/outdoor living porch and our detached garage. It gets limited sun. This is what we look out at from the porch while eating/relaxing. We are leaning toward a flagstone type patio with grass, moss or similar in between the stones, (we had this in our former home). We plan to have a planted area along the garage. The second door at the back of the garage will be the access for lawn mower etc. We're considering a small step down with a larger landing area to accommodate that unless there was some type of natural looking ramp (ha!) we could incorporate. Not sure what to do at the end by fence as it slopes down. Plantings? Water feature? (we like more natural looking water features, not a fountain). Thanks in advance for suggestions/ideas.

Are the trees' roots exposed or are those mostly rocks? You want something that stays close to the ground to absorb the impact of the water. With shade your choices may be somewhat limited. Vinca is ubiquitous around here. You can plant other little plants in between. Various wild geraniums are popular around here, and liriope, perhaps some ferns. I had a plant called sweet woodruff covering the ground in the shade at my last place, very pretty in the spring. Some other classics are small bleeding hearts and ajuga, (actually anything in the mint family, like native mountain mint or horsemint which you can grow from seed) and perhaps some thymes although they need a bit more sun, also woodland strawberry and virginia creeper are natives that are used and there is a dwarf goat's beard that is beautiful. Yarrow is good in partly sunny areas. Someone on here once told me about creating little pockets of good soil surrounded by rocks. I see you are good with the idea of trying to spread that water from your drainpipes out as much as you can instead of concentrating it. A good thing to do is create pockets where the rainwater can be absorbed to control the erosion, but the trees roots run contrary to that objective. I would just try planting things and see what takes off. That's what I do on my hillsides, just keep trying to get vegetation established. We use natural wood chips too, to hold down the soil.