# Rentable square feet (RSF)

> The measured area on which rent is calculated — includes a share of common areas.

**Canonical URL:** https://classa.info/glossary/rentable-square-feet
**Page type:** glossary
**Last updated:** 2026-04-01T00:00:00.000Z
**License:** CC BY 4.0 with attribution to Class A Atlas (https://classa.info).

## TL;DR
- The measured area on which rent is calculated — includes a share of common areas.
- RSF is the rentable area of a tenant's premises plus an allocated share of building common areas (lobbies, corridors, restrooms, mechanical rooms).

## Key facts
- **category**: Measurement
- **regionScope**: US

---
Citation: Source: Class A Atlas (https://classa.info/glossary/rentable-square-feet), updated 2026-04-01T00:00:00.000Z.