Cost Per Square Foot: Difference between revisions
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*Insulation R21 - $0.63/sf [https://www.menards.com/main/building-materials/insulation/insulation-rolls-batts/r-19-ecoroll-reg-kraft-faced-fiberglass-insulation-roll-15-x-39-2/817231/p-1444437001920-c-5780.htm]. Insulation R11 - 33 c/sf [https://www.menards.com/main/building-materials/insulation/insulation-rolls-batts/r-11-ecoroll-reg-kraft-faced-fiberglass-insulation-roll-15-x-40/817228/p-1444436999588-c-5780.htm] | *Insulation R21 - $0.63/sf [https://www.menards.com/main/building-materials/insulation/insulation-rolls-batts/r-19-ecoroll-reg-kraft-faced-fiberglass-insulation-roll-15-x-39-2/817231/p-1444437001920-c-5780.htm]. Insulation R11 - 33 c/sf [https://www.menards.com/main/building-materials/insulation/insulation-rolls-batts/r-11-ecoroll-reg-kraft-faced-fiberglass-insulation-roll-15-x-40/817228/p-1444436999588-c-5780.htm] | ||
*Coil is $500/ton from China [https://www.alibaba.com/pla/Hot-Gi-Dip-Electro-Hanging-Plating_1600400015681.html?mark=google_shopping&biz=pla&searchText=galvanized+steel+products&product_id=1600400015681&pcy=US&material=H63563ee980b84c7fbc14acbd2482ddeaA.jpg&src=sem_ggl&field=UG&from=sem_ggl&cmpgn=20752788451&adgrp=156945387962&fditm=&tgt=pla-294505072980&locintrst=&locphyscl=1020590&mtchtyp=&ntwrk=g&device=c&dvcmdl=&creative=679753859671&plcmnt=&plcmntcat=&aceid=&position=&gad_source=1&gclid=CjwKCAjw4_K0BhBsEiwAfVVZ_1LAFxtKed3bKMCIBaEj9EXpbsgoiar80I76kVcB8PvOevEsxaJIVRoC29EQAvD_BwE]. If weight is 0.5 lb/sf - then this is $500/4000 sf. Ridiculously low price of 12.5 c/sf | *Coil is $500/ton from China [https://www.alibaba.com/pla/Hot-Gi-Dip-Electro-Hanging-Plating_1600400015681.html?mark=google_shopping&biz=pla&searchText=galvanized+steel+products&product_id=1600400015681&pcy=US&material=H63563ee980b84c7fbc14acbd2482ddeaA.jpg&src=sem_ggl&field=UG&from=sem_ggl&cmpgn=20752788451&adgrp=156945387962&fditm=&tgt=pla-294505072980&locintrst=&locphyscl=1020590&mtchtyp=&ntwrk=g&device=c&dvcmdl=&creative=679753859671&plcmnt=&plcmntcat=&aceid=&position=&gad_source=1&gclid=CjwKCAjw4_K0BhBsEiwAfVVZ_1LAFxtKed3bKMCIBaEj9EXpbsgoiar80I76kVcB8PvOevEsxaJIVRoC29EQAvD_BwE]. If weight is 0.5 lb/sf - then this is $500/4000 sf. Ridiculously low price of 12.5 c/sf | ||
*Hot rolled coil at $1k/ton - 25 cents/sf at the [[30 Gauge]] thickness. | *Hot rolled coil at $1k/ton [https://www.thefabricator.com/thefabricator/blog/metalsmaterials/historically-high-steel-prices-appearing-more-regularly]- 25 cents/sf at the [[30 Gauge]] thickness. | ||
=About in Housing= | =About in Housing= | ||
Revision as of 23:27, 21 July 2024
Materials
- SIPs - $9/sf for R16. See SIP Panel Cost
- PV Panel Cost - $3.4/sf
- OSB - 7/16" -
- Rebar - 35 c/ft [1]
- basic 4x9 module in 2x6
- Insulation R21 - $0.63/sf [2]. Insulation R11 - 33 c/sf [3]
- Coil is $500/ton from China [4]. If weight is 0.5 lb/sf - then this is $500/4000 sf. Ridiculously low price of 12.5 c/sf
- Hot rolled coil at $1k/ton [5]- 25 cents/sf at the 30 Gauge thickness.
![[4]](https://www.alibaba.com/pla/Hot-Gi-Dip-Electro-Hanging-Plating_1600400015681.html?mark=google_shopping&biz=pla&searchText=galvanized+steel+products&product_id=1600400015681&pcy=US&material=H63563ee980b84c7fbc14acbd2482ddeaA.jpg&src=sem_ggl&field=UG&from=sem_ggl&cmpgn=20752788451&adgrp=156945387962&fditm=&tgt=pla-294505072980&locintrst=&locphyscl=1020590&mtchtyp=&ntwrk=g&device=c&dvcmdl=&creative=679753859671&plcmnt=&plcmntcat=&aceid=&position=&gad_source=1&gclid=CjwKCAjw4_K0BhBsEiwAfVVZ_1LAFxtKed3bKMCIBaEj9EXpbsgoiar80I76kVcB8PvOevEsxaJIVRoC29EQAvD_BwE){kind=link}
About in Housing
Summary: cost per square foot is largely meaningless. You don't know what it means until you consider:
- Does it include builder's profit?
- Does it include livable space only? (or other such as garage or porch)
- Does it include basement?
- To compare house costs properly to the OSE/OBI Seed Eco-Home, we consider new construction (median used homes are $120k lower cost [6])
- Measured for livable space (cost to build the complete home / sf of livable space only) only as the claimed industry standard of measuring cost of a home. Thus, a large garage and porch or upscale interior finish drive the cost up [7]. Does not include land.
- Average USA cost is $150 builder grade [8]. But this figure is different than the industry standard cost method - here they don't include land NOR non-livable space such as garage. Thus, the Forbes definition is not the standard definition.
- Median is more useful with nonsymmetric distributions, such as ones skewed by high cost outliers such as housing. [9]. The average is higher, median is the average Joe price.
- Average sale price of a new home USA is $487K, median is $416k [10]. Or about $190-$220/sf.
- If average cost to build a house is $280k [11], then land + legal is $200k.
- Median sf is 2300
- There are 6 classes of house quality. Lowest cost is $60/sf build cost. Highest is $500/sf (luxury) [12]
- Cob homes are the lowest cost to build, but highest cost to buy [13]. Build cost is way off - it doesn't include any MEP.
- Summary: average cost to build a new home $300k (land not included), to buy $500k [14]. Detailed breakdown of the $500k by NAHB for what appears to be builder grade - [15]
- OSE Value Summary: OSE build cost is $60k materials + $25k labor) for an entry-level, high quality home - $85k or $65/sf for the 1300 sf 3 bed/2 bath model, compared to the $114/sf NAHB survey average (2600 sf). The OSE cost does not include land, site prep, legal, design & engineering, overhead, profit, financing, marketing, sales, or any other fees. The NAHB cost does not include land, site prep, overhead, profit, financing, marketing, sales but does include permit, impact, engineering & design fees.