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Home addition costs

Old 01-19-2007, 01:01 PM
  #1  
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Default Home addition costs

I'm considering adding an approx 10x15' addition to my house to extend the family room. I'm thinking the addition would be on a slab and only 1 level. What would the approximate cost on such a project be? I have no idea what to expect. A rough estimate is fine.
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Old 01-19-2007, 01:14 PM
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Are you going to pay someone to do it or tackle it on your own? I built a 14x16 addition on the house this summer and did everything but the drywall. Materials alone were in the $12k range and that's without a foundation because I built the addition (sun room) over an existing deck. If I had paid someone to do the job I would have been looking at 25-30k or possibly more.
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Old 01-19-2007, 01:15 PM
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Default Re: Home addition costs

I would like to have someone do it.
I didn't realize it would be that much.
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Old 01-19-2007, 01:23 PM
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Default RE: Home addition costs

paulyjsob - 1/19/2007 1:01 PM

I'm considering adding an approx 10x15' addition to my house to extend the family room. I'm thinking the addition would be on a slab and only 1 level. What would the approximate cost on such a project be? I have no idea what to expect. A rough estimate is fine.
150 sq.ft @ 100.00 = 15k Just depends on sq.ft charge
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Old 01-19-2007, 01:24 PM
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Not to be a smart azz but we just re-did our kitchen. The final cost will be close to twice what my initial, ignorant thoughts were. It will look awesome when it is done, but the cost of many things was an eye opener.
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Old 01-19-2007, 01:29 PM
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South Florida Building Code is the strictest in the country. You can not build here for under $250 a foot.
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Old 01-19-2007, 01:40 PM
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Wow. That's crazy.
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Old 01-19-2007, 02:09 PM
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Default Re: Home addition costs

You asked ......so here is my take on remodeling/building.

I have had many building projects in my 73 years, almost all, do it yourself projects. I found that however precise I thought my estimates of cost were the final cost was three times my original estimate.

Closely figure your total cost then multiply your estimate by three, you can’t go wrong.

If you have a contractor do the job you of course have a fixed price (maybe). You will probably/possibly have a problem/problems with the contractor. Contractor problems are the rule not the exception.

Very hard to put a happy face on any construction project.

Recently had a contractor build me a 30‘ wide X 40‘ deep boat barn, I was very careful to specify everything, the contractor disregarded the contractual specs. and had to return most of the materials he ordered over the course of the job, he of course ordered much inferior materials than were specified.

I came very close to a lawsuit with the creep. He decided he was on the losing end of the stick and refunded a large amount of the contract price.

I finished the barn myself and ended up with a cost of about $20,000 which is a good price for an insulated and heated barn, 220 sub panel, water and natural gas, with a huge storage loft above.

Doing it yourself can be hard work, but fun. Contracting it out is almost always a heartache/headache.





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Old 01-19-2007, 02:48 PM
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Default Re: Home addition costs

A lot has to do with cost in your area and what you are building. An extension of an existing family room has fewer variables than say an additonal bath or kitchen remodel. You are looking at concrete, walls, windows, electrical, and interior finish vs. appliances, toilets, etc. In central Alabama you will be close at $75 - $85ft/2 DIY or $95 - $110 ft/2 contracted. Now iff you start adding the granite counter top to the furniture grade wet bar, surrounded by 20" ceramic tile to show off the 7" crown trim, add $$$$$$$$$.
If you are somewhat handy, you might consider contracting the shell and finishing yourself, or the part you can. Not sure I would contract it as one job. Sub it out.
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Old 01-19-2007, 03:02 PM
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Default Re: Home addition costs

kbs - 1/19/2007 2:48 PM

A lot has to do with cost in your area and what you are building. An extension of an existing family room has fewer variables than say an additonal bath or kitchen remodel. You are looking at concrete, walls, windows, electrical, and interior finish vs. appliances, toilets, etc. In central Alabama you will be close at $75 - $85ft/2 DIY or $95 - $110 ft/2 contracted. Now iff you start adding the granite counter top to the furniture grade wet bar, surrounded by 20" ceramic tile to show off the 7" crown trim, add $$$$$$$$$.
If you are somewhat handy, you might consider contracting the shell and finishing yourself, or the part you can. Not sure I would contract it as one job. Sub it out.
Same here I think. I normally use the $100 square foot number when looking at projects.
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Old 01-19-2007, 03:02 PM
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I am in the final stages of permitting for a 800sq' all frame / no slab addition with no interior stud walls. The quotes I got from contractors even "friends" was 250-275 per sq' ROUGH FINISHED. That's just framed stuccoed and roofed. No dry wall or finish work. No plumbing or HVAC or marble or even one F'ng light fixture.

So, you still want to move to Florida? That's 1/4M$ !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I've got 8,000$ in architect and engineering alone already.


So I'm going owner builder. BTW owner builder is actually pronounced "Back Burner" when it comes to engineering and permitting.

Engineer: Quote: 10-14 working days. reality: 11 weeks

City building permit: Quote: two weeks, reality: this is the 9th week.

Good news is I found two good framers for 25$ an hour.

Have fun.
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Old 01-19-2007, 03:13 PM
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And people on the boating board complain that the price of boats has skyrocketed in the past 10 years. My mom had her contractor quote adding a two car carport to her house. He came back with $46,000!!!! I told her he was f#$king crazy! Of course, this is the same jacka$$ that told her 6-8 weeks for a complete kitchen remodel that is now in the 10th month with no change orders from her.


Sorry I didn't answer your question. My unofficial guess would be to estimate on the high side (only if you don't have strict wind codes to deal with) at $150/sq ft, so $22,500?
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Old 01-19-2007, 04:54 PM
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Default RE: Home addition costs

100 sq.foot if you gotta have all the upgrades 150 sq.foot
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