This is a finished 1,188 sq ft detached two-story ADU in Rosemead, CA — 3 bedrooms, 2 full bathrooms, an open-plan kitchen and living area downstairs, and a loft, two view bedrooms and a private balcony upstairs. We designed and built it, and the 48-second walkthrough below shows every room. It’s a working example of how a two-story ADU fits a full family home onto half the footprint a single-story would need.
48-second walkthrough of the finished unit, filmed on handover day.
Project at a glance
| Location | Rosemead, CA (San Gabriel Valley, Los Angeles County) |
| Type | Detached two-story ADU, new construction |
| Size | 1,188 sq ft |
| Layout | 3 bedrooms, 2 full bathrooms, second-floor loft |
| Finishes | European flat high-gloss cabinets, quartz counters, stainless appliances, Kohler fixtures, glass showers, luxury vinyl plank flooring |
| Extras | Walk-in closet, private balcony, city and mountain views |
01Downstairs: one open room that lives large
The ground floor is a single open volume: kitchen, dining and living in one run, with big windows on the long wall so the space is lit from the side all day. In a footprint this size, walls are what make a home feel small — so downstairs has almost none. The stair is pushed to the rear wall where it borrows no living space, and a full bathroom sits on the ground floor, which matters more than it sounds: it means the downstairs can work for an aging parent or a guest who shouldn’t need stairs.
02The kitchen: flat-panel gloss and quartz
The kitchen runs in a U against the back of the unit: European flat high-gloss cabinets, quartz counters, a full-height marble-look tile backsplash and stainless appliances, with a deep single-basin sink under its own window. These are the same finish decisions we walk through with every client — and a good example of how an ADU kitchen doesn’t have to feel like a compromise.
03Two real bathrooms, one on each floor
Both bathrooms are full baths — no half-bath compromises. Downstairs gets a frameless glass shower with a rain head and a floating vanity; the second-floor bath is fitted with Kohler fixtures. Two full baths is what lets a 3-bedroom layout genuinely work for a family or for roommates, rather than just on paper.
04Upstairs: the loft in the middle
The stair arrives at a loft rather than a hallway — a flexible landing zone that works as a home office, study corner or second living room, and opens through a slider onto the balcony. In two-story layouts, this is the move that separates a well-planned unit from a stack of corridors: circulation space that earns its keep.
05Bedrooms with actual views
This is the argument for building up. On the ground you’d be looking at a block wall; on the second floor these bedrooms get mountain views on one side and city views on the other, light from two directions, and privacy no single-story backyard unit can offer. One bedroom adds a walk-in closet — rare in ADUs at any size.
06The balcony
A backyard ADU normally trades away outdoor space; a second-floor balcony gives some of it back without touching the lot. It’s also the kind of feature that shows up directly in rent: outdoor space and views are what listings lead with.
Why two stories was the right call here
A 1,188 sq ft single-story unit would have consumed most of this backyard. Building up put the same square footage on roughly half the ground footprint — keeping yard, keeping setbacks comfortable, and buying the views and privacy the bedrooms now enjoy. If your lot is tight but your space needs aren’t, this is the trade to study: our two-story ADU guide covers height rules, structural costs and when the math works, and the cost calculator gives a 2026 range for any size at our published rates.
Building in Rosemead or the San Gabriel Valley?
We design and build ADUs across Orange County and Los Angeles County, including the San Gabriel Valley. City rules differ — our ADU rules quick-reference table shows how requirements vary city to city, and the Los Angeles ADU page covers the LA side. If you are in Pasadena, the Pasadena ADU guide covers the SGV city with the most distinctive review process. 我們提供中文服務 — 請參閱中文 ADU 指南。Call (949) 374-7980 for a free site evaluation.