I will get some difference of opinions on this, but I have been keeping my decks and homes seperate so they can do their own thing. So, I butt my decking up close to the home, but do not attach it via ledger board.
15 x 13. I would like to persuade you to consider 15 x 12. You will have waste and extra prices by going the 13. Most communities do not sell 14 footers, they for some reason skip 14 and go straight to 16. Now this may vary within regions, but in Dallas, its hard to find 14.
No too, we do not have a frost line and all that stuff, so I dig a hole about 2 feet deep and sink 4x4 posts in concrete for my posts. This works for me and my region.
Ok, material list for a 15 X 12 deck using 2 x 6 decking, 2x6 joists floor, and 2x8 beams, and 4x4 posts, and nothing else.
decking material: 33 2x6x12 Joists 24 OC: 8 2x6x16 Caps all around 1 2x6x16 2 2x6x12 Beams 6 2x8x12 Posts 6 4x4x8 * how high off ground Carriage bolts 18 each with washers and nuts Fasteners 25 pounds of galv 12D ringshanked deck nails. Concrete 1 each 40 pound bag per hole.
Use pressure treated wolmanized treated wood.
But up all decking boards and when dried they will come out at a spacing of about 1/4 inch. If you space green PT wood it will just about double that distance when dried out.
If I was building this deck for you and no other amenities I would charge $900 in labor and material would be about $750.