40 x 40 x $115 per sg. ft. used as a approx figure
is this area of the country we have to use a elevated foundation (sea level based height)
A minimum of 10' above sea level
land clearing, at a minimum scraping any and all oganic matter off the footprint
foundation fill
footers
block
slab, rebar, 6 mil. poly, anchor bolts, re-enforced slab for multiple table weight
concrete @ $92 per yard, slab plus block fill concrete
walls (usualy higher than 8') 1/2" 4 ply CDX plywood wall sheathing
Building paper or Tyvec?
Proper flashing or tape for window and door openings (manfucature's specs)
Siding, soffit, facia & rake board finish
roof vents & boots, felt paper, eve metal
5/8" 4 ply CDX roof plywood
20 year shingles
HVAC
HVAC closet, door for same
HVAC chase
Return air filter grill
Electrical, possible need of a sub-panel ?
Lighting allowance
Flooring allowance
a 1/2 bath for guests, wall paper in same?
bath flooring
bath sub-floor ie. Wonderboard (cement board) for tile
Closet?
Closet Shelving? wood or vinyl coated wire?
If 1/2 bath and closet, additional sq. ft. to that 40' x 40' ?
plumbing
plumbing fixtures
sewer line?
sewer tie in?
water line?
Trench for sewer & water
insulation
sheetrock
trim, width & style, crown molding?
paint, walls
paint, trim
paint, windows, doors, trim of same
fasteners
materials
Trusses, conventinal joists can't span 40" Even trusses will have at least a 2 x 6 bottom cord
overhead
profit
supervisory fee
plans & spec sheet, engineering fees, inc. a drainage plan
plan reproduction
If in a subdivision, submitting plans and specs to Homeowners Review Board for approval
Workmans comp.
Liability
(you must submit detailed, stamped plans to the local building authority) prior to receiving a permit
permit fee's
how many windows?
interior doors, solid core? composite?
exterior doors? French door? or doors? opening onto a wood deck or concrete patio? if so
Deck
Hand rail
stairs
exterior lighting?
sod, landscaping?
gutters & downspouts? material of same?
Contract
Legal review of same?
What are getting for your money? it all needs to be in laymans terms, spelled out exactly
The above is a non-enclusive list
I'd say 85k could be a great price depending on what is included in that 85k
I spent $100k in my yard two years ago........