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How do I estamate building cost for interior

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Topic by slooper posted 12-27-2008 11:39 PM 22473 views 0 times favorited 5 replies Add to Favorites Watch
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slooper

16 posts in 3552 days

12-27-2008 11:39 PM

Topic tags/keywords: cost interior diy

I am in the process of purchasing a home kit. The kit itself is a known cost and includes only the framing, roofing and exterior. Can anyone tell me how to estimate the cost of finishing the interior? I’m looking for really rough numbers, like so many $ per square foot + $x dollars for each bathroom and $x for kitchen assuming decent quality fixtures, etc and that I will be doing most of the labor myself?

Thanks,
-Slooper



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slooper

16 posts in 3552 days

12-27-2008 11:41 PM

I forgot to mention: The costing should will need to include all of the interior walls.

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PaBull

701 posts in 3767 days

12-28-2008 12:42 AM

I am almost done with my house, 5000 sq ft, $1,000,000. This is in California. I was the general and I drew the plans. I hope this helps. Check out the pictures on this site to see the house.

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Catspaw

35 posts in 3804 days

12-28-2008 02:54 PM

Well, there is no easy way to do it. The only way I can keep from fooling myself is to sit down with the plans and measure everything and work it out number by number. It also depends on how much you plan to do yourself.

I suppose you could get an estimate for the whole house then subtract the cost of the kit and that would tell you the ballpark you’re in.

Remodelers sometimes will estimate by the lineal foot. Drywall is usually per square foot to hang and finish. HVAC, electric, and plumbing are what they figure out. Kitchen cabs can be estimated by going to the box store and picking a style and are priced by the foot (be sure you are getting the price per foot for uppers and lowers.) Countertops are usually lineal foot. Flooring per square foot.

Just no easy way to do it. The last house I built, one of the clients broke down in tears because she was so over-whelmed with the amount of decisions she had to make. That was only on all the stuff that the general doesn’t decide on….light fixtures, plumbing fixtures, cabinet styles, paint colors, trim styles, flooring styles, etc.

If you’re doing it yourself, make yourself a list of everything that has to be purchased, installed, built, etc. then put a price to it. If not you just have to contact subs, and have them give you an estimate.

-- arborial reconfiguration specialist

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Dan Lyke

331 posts in 3820 days

12-29-2008 06:03 PM

Go buy a copy of the RSMeans book Residential Square Foot Costs 2009 .It’s not quite as simple as “x square feet * dollars per square”, but they have “here’s what a bathroom costs”, with breakdowns if you’re doing special tubs or showers or whatever, here’s what wallboard, flooring, for 4 different pricing levels (economy, average, custom, luxury), and with geographic adjustments (ie: in my area I can expect to pay 1.25x the standard estimate).

And the breakdowns go from rough (“average” interiors with 1/2” wallboard, painted trim, 40% carpet, 40% hardwood, 15% vinyl, 15% ceramic tile, hollow coor doors runs $24.75/sq.ft. in 2007) to “the 4×8 wood mantle beam on your fireplace will cost $94.20 parts + labor (again, 2007).

Don’t shop for a house or get bids for work without having a copy of this book.

-- Dan Lyke, Petaluma California, http://www.flutterby.net/

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dbray45

158 posts in 1615 days

07-16-2015 04:24 PM

You know, showing the plans to various contractors and getting quotes is not a bad idea. Unless you have done a lot of construction, there are a serious amount of things that could go wrong, have hidden surprises, upgrades for code changed, etc…

Having 3 quotes from the HVAC, plumbing, construction, electric and the like gives you two things – materials cost and labor cost – especially if you have a problem that requires help

-- Love woodworking and fixing most anything

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