I met with a builder today regarding my attached single car garage addition and he gave me a ballpark of around $40k. This does not include removing the existing 350 sq ft concrete driveway and apron and installing a new 300 sq ft driveway and apron. Seems very high to me. This works out to about $135/sq ft. I assumed it would be more like $75/sq ft. I'm obviously getting more estimates, but is this what I should expect for a 15' x 21' attached garage? He said that since I have a finished basement, they'll need to dig down to the footer where the garage meets the house (two points), and back fill with concrete. The reason being was to support the garage so it is not applying any lateral force to the existing foundation. I didn't realize my garage would be applying lateral force on the house :confused: Either way, I don't really see how this would add very much cost. Dig more dirt and pour more concrete. Big deal. In addition to the garage, I want to add a 5 ft wide by 15 ft long attached "corridor" that connects the garage to the inside of the home (basically bump out the dining room wall five feet to allow a passage). This will also supposedly require digging down to the depth of the existing footer and back filling. He mentioned the alternative would be to put the structure on stilts (like a deck) and insulate the floor. I guess I wouldn't be opposed to doing it this way. I'd hate to do it on stilts to save a couple thousand and regret not doing a foundation with crawlspace instead. Not sure what if any drawbacks there would be to doing it on stilts. I'll be building a wooden deck off the side of that corridor, so I suppose it kind of makes sense to do it this way. Plus it will be cheaper.

what grease/lube should i use for the wheel bearings of the rollers the main torsion spring the square tube (trolley)(i believe this is only lubed on the top side?) the chain i heard DO NOT lube the actual track where the rollers go on is this correct?