Can RoomPlan scan multiple rooms?

The first RoomPlan, in 2022, was built for one room at a time, up to 30 by 30 feet.^[2] A floor plan of a home needs more than that. Here is what changed, how multi-room scanning works under the hood, and what it means when you hold the phone.

How RoomPlan scans more than one room

Apple introduced multi-room scanning with iOS 17.^[3] The rooms are captured into one structure, which Apple calls a CapturedStructure, so walls, doors, windows and objects line up across rooms.^[4] Apple describes two ways to keep every room in the same coordinates:^[1]

From Apple's WWDC23 session on RoomPlan. Both feed StructureBuilder, which merges the rooms into one structure that can be exported as USDZ.^[1]

Approach	When it fits
Continuous session: the tracking keeps running from one room to the next	Scanning the rooms in one visit, walking from room to room.
Relocalization: a saved map lets a later scan find its place again	Scanning rooms on different days and adding them to the same home.

Apple's documentation adds that a structure can hold rooms with varying floor heights and rooms on different floors.^[4]

Apple's limits for multi-room scans

• Size: best for single-floor homes with one to four bedrooms, living room, kitchen and dining room, up to about 2,000 square feet in total.^[1]
• Light: at least 50 lux, about a family living room at night.^[2]
• Time: no single scan over 5 minutes, because of battery drain and heat.^[2]
• Hard surfaces: full-height mirrors and glass, very dark surfaces and high ceilings.^[2]

How PlaceAnew does it: one walk per floor

In PlaceAnew you do not scan room by room and press "next room". You start once and keep walking through open doors; the scan follows you, so the hallway, every room and the doors between them come out in one plan with one set of coordinates. When you finish, PlaceAnew draws the floor plan: walls straightened, rooms named with their square footage, doors and windows in place.

The sample home in these screens is one walk: 8 rooms, 648 ft², and a Walk recording of 3 minutes 23 seconds.

For houses with more than one floor, PlaceAnew scans each floor as its own scan, so each floor gets its own clean plan, 3D model and exports. Step-by-step route advice is in how to scan an entire house.

When a multi-room scan goes wrong

Problem	Fix
The scan loses its place in a doorway or hallway	Slow down, point the camera at a corner or furniture, and give it a moment to find its position again before walking on.
A room is missing	It was skipped or walked past too quickly. Scan the floor again, entering every room and circling it.
Rooms do not quite line up at the far end	Small drift between rooms is the known weak point of RoomPlan apps.[5] Check one long overall dimension with a laser meter if the drawing must close exactly.
A wall behind a mirror or glass is missing	Mirrors and glass are hard for LiDAR.[2] PlaceAnew draws the wall dashed; correct it in the editor.

How good is a multi-room RoomPlan scan?

In a 2026 peer-reviewed study, an app built on the same Apple RoomPlan technology scanned a house and two office floors. It found all 8 rooms of the house, its total room area came within about 5% of a terrestrial laser scanner's model, and room shapes overlapped that model with a score of 0.84 in the house and up to 0.93 in an office.^[5] The whole job took 32 minutes, against 20 hours for the laser scanner and manual modelling.^[5]

Questions people ask