The Doi Thepnimit temple is a "Samnak Song" (สำนักสงฆ์) which is more like a monastery or meditation center. These places may not have all features of a larger Wat. Doi Thepnimit has really just one large Chedi with a great view and on a lower level are buildings that look like accommodation and dining areas for Monks or people coming to study or meditate.
The road to reach Doi Thepnimit temple starts right next to the shrine on top of Patong Hill, between Patong and Phuket Town. The road is concrete and very steep in places - the temple is about 100 meters / 330 feet higher than the road. It's about 1km along this road and there are some views on the way looking through the trees across the hills and the Kathu area. Just before the temple there's a right turn next to a golden Buddha statue and you drop down a little to reach the temple. There you get the best view.