One shared wall,
a full second home in Loomis.

The wall you share quits being an ordinary interior partition the moment two separate dwellings sit on either side of it. Code wants a rated separation then — usually a one-hour fire assembly running floor to roof deck, the right gypsum layers, fireblocking, and ideally a sound-rated cavity so your tenant isn't living inside your TV. This catches people off guard. On older ranch homes out toward the Loomis Basin and Taylor Road we've opened walls expecting plywood and found board sheathing, no fireblocking, and wiring that's seen a few decades of foothill summers. That existing wall almost always needs upgrading to carry the rating. We detail the assembly on the plans, build it to the listed spec, and the Town inspector signs off on something real.

Here's a range, then the honesty. A 472 sq ft one-bed attached unit with sensible mid-grade finishes generally lands around $214K to $276K all-in in Loomis. Go bigger — a 738 sq ft two-bed with its own utilities throughout — and you're closer to $301K to $389K. Attached usually pencils a touch under detached per square foot, because you borrow a wall and tap utilities already on that side of the lot. Two Loomis caveats move the number. The ground is granite and decomposed granite foothill rock, so footings and trenches can hit rock that needs breaking. And most of these big lots run septic, so the system has to take the added bedroom load before anyone signs. We test the ground and check the septic early so the quote reflects your actual dirt.