Data room providers for property and infrastructure

These deals routinely involve tens of thousands of documents across dozens or hundreds of individual assets, from leases and title documents to environmental surveys and planning consents. Bulk upload with automatic folder structuring by asset, and the ability to bulk apply permissions across an entire asset folder rather than document by document, saves real time compared with a room designed around a single company's document set.

Because infrastructure assets often sit at the centre of a financing as well as a sale, the room frequently needs to stay open and accessible to lenders, valuers and insurers well beyond the point a typical M&A room would close. That makes ongoing subscription cost, not just initial setup, a real factor in the decision.

A typical room organises by asset first, then by document type within each asset: title and lease documents, planning permissions and building consents, environmental and structural surveys, insurance schedules, service contracts, and any existing debt or charge documents against the asset.

A separate, portfolio-level folder usually holds financial models, the information memorandum, and any master agreements that apply across the whole portfolio rather than a single asset, kept distinct from the asset-by-asset folders to avoid confusion during diligence.

Given the scale involved, pricing across the enterprise vendors is on request and usually driven by document volume and the length of time the room stays open, which for infrastructure can run well past a year (Ansarada, 2026; Intralinks, 2026). Ask explicitly how storage overage is charged, since portfolios with hundreds of assets can quickly exceed a standard tier.

For smaller single-asset deals, Firmex and Onehub publish clearer indicative pricing and are worth getting a quote from even if the eventual choice is an enterprise vendor, simply to have a comparison point.

Confirm the vendor can support the long-term data retention and later re-access that lenders and insurers may require years after a deal closes, since infrastructure financings are frequently revisited during refinancing. ISO 27001 certification is standard among the enterprise vendors named here.

For UK planning and environmental documents that may later be subject to a freedom of information request via a public authority, confirm which parts of the room, if any, could be drawn into such a request and structure permissions accordingly.

See the full comparison at /rankings and the scoring approach at /methodology before choosing a vendor for a portfolio of this scale.