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Thread: Figuring out house plan square footage.

  1. #1

    Figuring out house plan square footage.


    Jeese, looks like the denizens of TBN have moved on over to
    CBN! [img]/forums/images/icons/laugh.gif[/img] Which is a good thing. [img]/forums/images/icons/smile.gif[/img]

    As I read other peoples questions about building there own
    house and problems with builders I just nod my head as I'm
    having the same toughts and issues.

    We have been talking to builders for 2.5 years. Found four
    and after talking with them for awhile ran away quickly from
    three. Found the fourth builders last summer and really liked
    him. We have spent quite a few hours talking with him over
    the last year and figured we had found a builder.

    To make a long story shorter and getting to the Subject Line,
    the builder gave us a qoute on a house sketch last winter.
    Based on that price per square foot I drew up some blueprints
    for the sketch. Decided the house was to big and redid the
    the blue prints. The price per square foot we where given
    from the sketch was $70. Now that is low and would go up.
    Also the first floor of the house, close to 2/3s the s/f of the
    house would be a finished concrete slab. That drove our
    cost down since we have no basement or crawlspace.

    We finally got a quote from the builder based on the
    blueprints. The house had gone up by about 25%! [img]/forums/images/icons/shocked.gif[/img]

    I figured the s/f on the house at around 2400/2500. His was
    3100ish. [img]/forums/images/icons/shocked.gif[/img]

    I know HOW he got 3100ish. My house design class and my
    book I used to draw up the blueprints showed the dimensions
    of the house from wood frame to wood frame. What this
    does it keep out the width of the brick from the house. This
    save about 1 linear foot over the two x,y diminsions of the
    house. That may not sound like alot but its big bucks. Has
    anyone else seen the dimensions done like this?

    The other thing he did that I really don't like is that there
    is a space over the living room that is open to the second
    floor ceiling. He counts this 300 s/f space in his bid. NOT!
    I certainly can't sell open air as liviable space if I had to sell
    the house. Has anyone seen this as well?

    Thus I'm now thinking of building my own house.... And not
    liking the idea at all. But I had similar problems when trying
    to get work done on the property and ended up with a
    tractor! [img]/forums/images/icons/smile.gif[/img]

    Thanks,
    Dan McCarty



  2. #2
    Junior Member
    Join Date
    Sep 2002
    Location
    Southwest Pennsylvania just north of Pittsburgh
    Posts
    22

    Re: Figuring out house plan square footage.

    Dan,
    I think your hitting on the difference in building square footage, and actual living space square footage. The builders deal with hsf since they apply material all the way to those points. Brick outside, drywall inside. Now your actual living space is a different story since it's inside dimensions. I have that "open space" the size of a small room in the foyer to the second floor. I thought of that this year during tax reassesment and mentioned it to the tax man...found out they don't cut any square footage breaks for that. They just consider the outside x by x dimension for square footage and base the tax on that. The only time it made a significant difference was when I built my log home and the second floor was lofted and was only half the first floor. Then the tax man reduced my sf down...but their figures were based on the outside 30 x 60 dimensions, not the actual interior living space sf.

  3. #3
    Senior Member
    Join Date
    Sep 2002
    Location
    West Newbury, MA
    Posts
    417

    Re: Figuring out house plan square footage.

    Dan,

    I've seen different ways of calculating the sq feet. The most common was:

    std ceiling living areas 1:1 (as in 1 actual = 1 calculated)
    cathedral ceiling 1:1 1/2
    basement / garage / attic (unfinished) 1/2:1

    This is used to get a "calculated" sq feet of the house to measure building costs against. Your actual sq feet will vary (especially with a full basement & attic)

    Look on the bright side, that cathedral celing room is 25% cheaoper than if it had a second story.

    Regarding including the walls, It doesn't make a large difference, maybe that's why he was cheap at $70 per sq/ft?

    To evaluate your costs from different builders, simply calculate the total cost using their price per sq foot & their sq foot calculation.
    Hazmat

  4. #4

    Re: Figuring out house plan square footage.

    rocky2,

    I'm glad to hear this explanation. [img]/forums/images/icons/smile.gif[/img]

    We <font color="blue"> REALLY </font color> like this builder and are trying
    to figure out what is going on. If this is a standard way
    to calculate the s/f then I'm ok.

    Its still a big suprise to us and money wise is a no go.

    I'm I'm going to get taxed on empty air space as well as
    charged the same rate per s/f we ain't gonna have the
    open area! [img]/forums/images/icons/smile.gif[/img]

    Thanks,
    Dan

  5. #5

    Re: Figuring out house plan square footage.

    Hey Hazmat,

    We aren't sure why he went up so far in price. We think he
    made a mistake or he is to busy and does not want to say
    no.

    I'm going to talk to him this week and see why the $/sf went
    up so high.

    The sketch that came in at $70/sf is pretty danged close in
    square footage as the blueprints. So I'm not really TOO
    concerned with the square foot issue other than the X * Y
    gives us a number we can't afford! [img]/forums/images/icons/shocked.gif[/img] He is being
    consistent in how he comes up with the numbers which is a
    good thing.

    Now the cost per SF is a big deal that he and I will have to
    discuss.

    That extra foot in the X and Y dimensions might not sound like
    alot but it is dollar wise. For our house that adds between
    10,000 and 13,000 dollars depending of the $/sf.

    Another clue to the puzzle is that we had a neighbor house
    that was about the s/f our builder is using. That house came
    in at $72/sf. At the 70/sf mark our house was likely a bit
    costly than the other house.

    Thanks,
    Dan

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