BIM project work from home: VPN, cloud, or NAS?

Remote work with large CAD and BIM files is a different discipline from standard home working. Opening an email or spreadsheet on a home laptop does not interest anyone, synchronising a central model hundreds of megabytes in size over a domestic connection is, however, a completely different problem. This article compares three real-world approaches and recommends when to use each.

Why remote work with BIM data is specific

Standard office applications work with small files and can tolerate higher latency. In contrast, Revit or ArchiCAD with a central model are sensitive to network delays, every synchronisation, opening of a view or loading of a linked model involves transferring large volumes of data. A home connection with higher latency or lower upload speed can slow this work down to an unusable level, even if download speeds are fast.

Three approaches to remote work

1. VPN to the company network or NAS

VPN creates an encrypted connection between the home computer and the studio network, as if the architect were sitting in the office. The advantage is security and direct access to shared data. The disadvantage is sensitivity to latency, if a large project file is transferred over VPN, work may be noticeably slower than in the office, especially with poor home connectivity.

2. Cloud storage with synchronization

Cloud storage tools synchronize files in the background between office and home computers. They work well for individual smaller files, but with central BIM models edited by multiple people simultaneously, version conflicts are a risk, two users may independently edit the same file, forcing synchronization to determine which version is valid. Therefore, cloud synchronization alone is insufficient for controlled collaboration on a single model.

3. Remote workstation (virtual station in the cloud or remote desktop)

With this approach, Revit or ArchiCAD runs physically on a powerful computer in the office or in the cloud, and the architect at home sees only the transmitted screen image. All heavy work, calculations, synchronisation, opening files, takes place locally on a fast network near the powerful machine; only the image is transmitted to the home computer, which is far less data-intensive than transferring the entire project.

Comparison of approaches

Latency: why it matters more than download speed

Home connections are usually advertised by their download speed in megabits per second, but for working with central models over a network, latency is key: the time it takes for a request to travel there and back. High latency manifests as freezing and waiting during every synchronisation, even if the connection speed itself is sufficient. Cable connection is therefore almost always a better choice than mobile data or public Wi-Fi.

Practical recommendations

• Small team, occasional work from home A VPN connection to the studio's NAS is sufficient if you work more with individual files than with a large central model.
• Team with a shared central model - consider a remote workstation or a virtual station in the cloud, which will significantly reduce dependence on the quality of your home connection.
• Hybrid setup - many studios combine both: VPN for regular files and email, and remote desktop for working on demanding models.
• Security - For both access methods, encrypted connections and two-factor authentication are standard, not just username and password.

The choice between individual approaches also depends on how the studio's central repository is configured, see the article. on choosing a NAS for an architectural studio - and how the data is backed up, as described in the article on backing up CAD and BIM projects.