Reply to Cost Ballpark in 2013 for Two-Story Addition in Bethesda/Chevy Chase

Forum Index » Real Estate

Reply to "Cost Ballpark in 2013 for Two-Story Addition in Bethesda/Chevy Chase"

Subject:

Emoticons





More smilies

Text Color: Font: Close Marks

[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous]It also very much depends on quality of the building. For example, a high end home will have floor/ceiling joists at 12 inches on center instead of 16...you may also have insulated sheathing instead of standard OSB. How about engineered studs? These costs can easily add 10-15% to the cost of an addition.

Also, a dry well can easily cost $30,000 for a large system.

We did a 1,200 SF addition, all in cost was about $350k...the new construction (about 600 SF) was relatively insexpensive, the expansion to the eixsting home was much costlier.[/quote]

This is inaccurate.  High end homes do not have floor joists spaced at 12 inches on center.  They have joists deeper than 12 inches and use wood I joists that are still spaced at 16 inches on center. [/quote]

Technical term is tji, and in custom applications they are spaced 12 inches. 16 is minimum code requirements and is what is found in typical builder quality work.[/quote]

I'm the pp who wrote this and I'm also a residential architect who designs high end custom homes.  I have never designed a home with a 12" joist spacing - it's just an inefficient use of resources and hard to fit electrical, mechanical and plumbing in between.  It is much more cost effective to increase the depth of the joist and maintain a 16" spacing and when designed properly can still be a stiff and rigid floor.   TJI is one manufacturer's designation for a wood I joist.  [/quote]

Options

	Disable HTML in this message
	Disable BB Code in this message
	Disable smilies in this message

Review message

Search Recent Topics Hottest Topics