Absorption in commercial real estate is the space, or the number of units, a market or project leases in a period, net of space vacated; the absorption rate is that amount as a pace, such as units a month. Brokerage reports and consultants supply the market figure and a spreadsheet turns it into a lease-up schedule; Titleman does not forecast absorption, it handles the site and the model the pace feeds.
Updated 19 October 2026. Published by Titleman, which makes one of the tools compared.
Two numbers people mean by "absorption"
Net absorption (a quantity) = space occupied at the end of the period minus space occupied at the start.
Absorption rate (a pace) = space or units absorbed per period, often divided by space available.
A related figure is months of supply = available space ÷ monthly absorption.
A worked example
For example, take an illustrative office submarket of 4,000,000 sf. Occupied space is 3,500,000 sf on 1 January and 3,560,000 sf on 31 December. Net absorption for the year is 60,000 sf, or 5,000 sf a month.
If 300,000 sf sits vacant, months of supply = 300,000 ÷ 5,000 = 60 months.
Now a project. For example, three comparable apartment buildings that delivered in the last two years leased 14, 16 and 18 units a month. A 200-unit building at 16 a month fills in about 12.5 months; at 12 a month, about 17. Those four months are carry, interest and a later exit, and they move the residual land value.
How a deal team builds the number today
Several years of submarket absorption from brokerage reports, lease-up history of comparable deliveries (often by calling leasing offices), minus the pipeline under construction. Then a base pace and a slow pace, both run through the model.
Which tool fits which step
| Option | Best for | What it does | Where it stops | Pricing model |
|---|---|---|---|---|
| Brokerage market reports | Submarket absorption and vacancy history | Quarterly figures by property type | Market level, not your project's pace | Usually free to clients |
| Market research consultant | A lender-ready demand and lease-up opinion | Field work, comps, a written study | Weeks of lead time | Fee per study |
| Spreadsheet | Turning a pace into a lease-up schedule | Months to stabilize, carry, reserves | Manual inputs, easy to break | Staff time |
| ChatGPT-style general assistant | Explaining terms, drafting a schedule layout | Text and formulas on request | No checked market figures | Per-seat subscription |
| Titleman | The site and the model around the pace | Zoning, the schemes that fit, cost and return per scheme in a live Excel | Does not forecast absorption | Credits per run; ask on a demo |
Where Titleman fits
Absorption is a market judgment, and Titleman does not make it. It shortens the work around it: a feasibility run, about 28 minutes at the median on production runs in the 30 days to 18 October 2026, returns what the zoning allows, up to 10 ranked schemes and a live-formula workbook to which you add the pace from your study. Every zoning figure carries its source, and gaps are named, not filled. For the demand side itself, a market study or a consultant fits better.
FAQ
Where does absorption data come from?
Brokerage market reports, market research consultants, and the lease-up history of comparable recent projects.
Can absorption be negative?
Yes. When tenants vacate more space than new tenants take, net absorption is negative and vacancy rises.
How do developers use absorption?
They turn it into a lease-up schedule. Months to stabilize drive carry, interest reserve and exit timing, so a slower pace lowers the return and the land value.
Does Titleman forecast absorption?
No. The lease-up pace is an input you bring from a market study, broker report or your own comps. Titleman returns the site side: zoning, the schemes that fit, and cost and return in a live Excel.
More on the model the pace feeds: development feasibility and residual land value with AI, how to calculate residual land value and how long an AI feasibility study takes. The product: land feasibility software. To see it on your site, request a demo.