What is the best way to scan a home?

Hi everyone,

A few months ago I started working for a company that measures homes or apartments to determine the rental price. We process these measurements in Revit and in this we place parameters that also give certain points. We do this on behalf of a housing corporation. Now it is also increasingly common that we are asked to map a complete block in preparation for renovation. We now have a Matterport infrared scanner, but it is not very accurate. We mainly use it to determine the angles of walls and then also measure them manually. We often see that the scans deviate considerably, especially in length, which makes them unreliable. For the last project we also hired a company that made a scan for us of the complete exterior and a large part of the stairwells, and they also scanned a home every now and then. We take all the information with us and process it in Revit to create a model that is as accurate as possible.

Now I personally think it makes sense to replace the older Matterport with something more accurate and perhaps also more flexible.

Now I am considering the following 4 things.

1. To start with, an iPhone with Lidar seems more accurate to me than the Matterport. But which app is most suitable for this?
2. A mobile scanner. Of course, we could also go through the house at a faster speed with this.
3. A static scanner is of course more accurate, but I am afraid that it will take more time.
4. A drone for the outside and roof, possibly with extra sensors.

An important thing with all 4 of the above points is that we regularly come across houses that are either occupied or still being renovated. In both cases, it could be that people are visible in the scan (we always try to avoid this, of course). The margins we are looking for are around 1-3 cm per house. If it concerns a block, it seems to me standard to do the outside with a static scanner, and combine this with a drone so that we also have insight into the roofs.

I hope could help me point out the best materials for the job.