I would like to know if anyone has estimated a single car garage.The building would be 13 feet wide by 20 feet deep 2x 4 frame.Single garage door two windows one on each side .12 IN 12 pitch 2x8 with collar ties arch asphalt shingles.siding would be cedar lap siding 4 inch wide 6/4 at corners and around windows and garage door . Foundation 3 foot deep with 2 foot wide footer and monolithic slab. garage door and windows total $1000 for material permits excluded.located in philadelphia area.