Just looking for a sanity check on my designs here...

Attached you will find the (extremely) rough sketch of my studio design. It will be a freestanding structure, so the bounding lines are exterior walls. (Fortunately, I have a second garage on my property to tear down and replace with a new slab with a studio on top of it!) All of the construction is fairly obvious, single story on a slab, rectangular, 2x4 walls, fink trusses (so the roof is entirely supported by the exterior walls), room-inside-a-room for the studio, etcetera - no huge surprises here. Because I am building it completely from scratch (right down to a new slab) I can pretty much do anything I want with it. Mostly, I'm just looking for a sanity check on my designs and any feedback anyone cares to share. Mixing/Control Room I am currently planning to build the control room according to the "golden ratio", the internal finished dimensions for the CR should be 271.25"(L) x 194.44"(W) x 100.8" (H). I am planning to soffit mount my monitors at the end of the room with no doors. I am planning to couple the truss space above the ceiling for additional bass trapping, as well. Double 5/8ths drywall on every wall/ceiling. (Cross section of CR:T-111 siding, structural plywood sheathing, [Slab edge], 2x4 stud wall, 5/8 drywall, 5/8 drywall, room interior.) Studio Here I do have a genuine question - is it gonna hurt me to use the 3 exterior walls that surround the studio as the outside of the airgap sandwich around the studio? I couldn'tt think of any reasons why it wouldn't work so long as it's all sealed up properly. (Cross section of studio: T-111 siding, structural plywood sheathing(airtight seal), [Slab edge], 2x4 stud wall, air gap, stud wall, 5/8 drywall (airtight seal), 5/8 drywall (airtight seal), studio interior.) Storage/Entry room This room will likely only get one layer of 5/8ths drywall, just so it's finished and not crappy. Please, by all means, lemme know if I've gone off the deep end on any of these plans. This is, after all, the first studio I'm building, so I'm expecting to be "out there" wrong on a few points. :) Thanks a lot! .J Edit: I forgot to mention, this structure is going up in Chicagoland, so I'll be using normal materials for the area, like gypsum board (drywall), T-111 siding, asphault shingles, wood framing, etcetera. 2nd Edit: I should clarify the slab dimensions as the image isn't terribly clear. The short side is 23' max. The long side is variable (as I'm just eating up my back driveway the longer I make it) but, I'm guessing it's going to be less than or equal to 45', but it could be up to a maximum of (roughly) 50'.

Some pics, a sketchup drawing or equivalent, why is the ISO room a square????! budget? I think you will get answers when you provide enough details as per "before you post" post.... Cheers

I probably should have posted last week to let you guys know that the plans are off, actually. The village shot down my plans, turns out the zoning here has changed as of a couple years ago and pretty much everything I wanted to do got blown clear out of the water. So, feel free to ignore my post and dedicate your time and brain cells to other threads, as this one is officially in the "done before it even began" phase. One thing that can be learned from this, though... check with whatever municipality does your zoning before you dedicate any time to a project that may not even be legal in the first place. Less of an issue with a home studio inside your house, but as far as building (or tearing down and rebuilding, like I was planning) the zoning may deep six you before you even start. As it turns out, if I tear down the garage I was going to tear down not only can I not build the studio I wanted to build, but I wouldn't even be able to re-build the exact garage I have there now. Zoning is a harsh mistress, it seems.