Minimum unit size requirements vary by jurisdiction and, in some cases, by zoning district — there's no single tri-county number. We confirm the applicable minimum for your specific property as part of the zoning check before design.

Cheaper overall, since total square footage is the smallest of any ADU type — but often higher per square foot, since a kitchen and full bathroom cost roughly the same to build whether the unit around them is 400 square feet or 900. Fixed costs don't shrink proportionally with size.

It's possible for a short stretch, but a studio's open layout is genuinely better suited to a single occupant long-term. If two people are the plan from the start, we'd talk through whether a one-bedroom layout makes more sense for your situation.

It generally still needs a full bathroom to function as an independent legal dwelling unit — that requirement doesn't shrink with the unit's overall size, though the bathroom's footprint can be designed compactly.

A wall-mounted or built-in Murphy bed folds up against the wall when not in use, freeing the floor space for daytime living use — it's a standard, well-established approach in studio design and doesn't create any special permitting issue on its own.

Typically no — a studio's defining feature is that it has no separate, enclosed bedroom, so it's usually counted and marketed differently than a one-bedroom unit. Worth knowing if resale bedroom count matters to your longer-term plans.

Often yes — a one-car garage's footprint is frequently right in the range that works well for a studio layout, though we confirm this against your garage's actual dimensions and your local unit-size requirements.

Often yes, particularly for a single-tenant rental market, and its lower construction cost can mean a faster return relative to investment compared with a larger unit — though achievable rent for a studio is also typically lower than for a one-bedroom, so the full economics are worth running together.