# Reading absorption vacancy and construction pipelines together Canonical: https://chicagocommercialfunding.com/guides/reading-absorption-vacancy-and-construction-pipelines-together/ Markdown: https://chicagocommercialfunding.com/guides/reading-absorption-vacancy-and-construction-pipelines-together/index.md Resource ID: reading-absorption-vacancy-and-construction-pipelines-together Published: 2026-10-21 Updated: 2026-10-21 Attribution: Chicago Commercial Funding Editorial Topic: strategy Asset types: All commercial Investment stage: Evaluate Experience level: Intermediate Read vacancy as a stock, net absorption as a change in occupied space, and construction as future competitive supply, using consistent boundaries, dates, and building cohorts. Vacancy, absorption, leasing activity, and construction describe different parts of a commercial market. Read them together before deciding that demand is improving or supply is scarce. A strong leasing quarter can coexist with weak net absorption, a declining vacancy rate can coexist with limited rent growth, and a large pipeline can be irrelevant to a particular property's tenant market. The investor's task is to connect reported activity with the premises tenants actually need. Record the report's date, geography, inventory, building size and class, measurement, and definitions. Then build a subject-specific competitive set. A Chicago metropolitan headline cannot automatically support a small storefront, older warehouse, medical office, or mixed-use leasing assumption. ## Stocks and flows answer different questions Vacancy is a condition measured at a point in time: vacant area relative to the inventory included in the report. Net absorption measures the change in occupied area over a period under the provider's methodology. New leasing measures signed transactions and may include relocations, renewals, or commitments not yet occupied, depending on the definition. Construction is another stock or flow depending on the column. Under-construction area is not the same as delivered area. Proposed projects are not necessarily funded or started. A building with a single tenant already committed can affect future inventory differently from speculative space seeking tenants. Do not combine reports with different universes into a seamless time series. An industrial report excluding small buildings and an all-size report can both be accurate while showing different vacancy. A direct-office vacancy measure differs from a broader availability measure including sublease space. Preserve the original labels rather than simplify them until their meaning changes. ## A hypothetical inventory reconciliation Assume a defined market begins with 10,000,000 square feet of inventory, 900,000 vacant, and 9,100,000 occupied. Its starting vacancy rate is 9%. During the period, 300,000 square feet is delivered and 50,000 is removed from inventory. Assume the provider's net absorption for the surviving and added inventory is positive 100,000 square feet, after accounting for the removal convention. Ending inventory is 10,250,000 and ending occupied area is 9,200,000. Vacant area is 1,050,000, giving approximately 10.24% vacancy. Demand improved in the sense that occupied space increased, yet vacancy rose because net new supply exceeded the increase in occupancy. These figures are hypothetical and the removal convention is expressly stipulated. In an actual report, inspect whether demolition, reclassification, conversion, and prior-period revisions affect absorption or inventory. A mismatch can reflect definitions or revisions rather than an arithmetic error. Now hold inventory at 10,000,000 and increase occupied area by 100,000. Vacancy falls from 9% to 8%. The same absorption produces a different vacancy result when supply changes. This is why a vacancy headline without an inventory bridge can mislead an investment decision. ## Chicago industrial evidence shows why cohorts matter CBRE's Q3 2026 Chicago industrial report, published October 9, records 3.6 million square feet quarterly net absorption and 12.4 million year-to-date; Joliet accounts for 6.3 million of that year-to-date amount. These are dated reported totals, not a claim that every Chicago submarket or building type shares the same demand. [CBRE Chicago industrial, Q3 2026](https://www.cbre.com/insights/figures/chicago-industrial-figures-q3-2026) A buyer of a smaller industrial building should therefore ask which tenants and spaces generated the activity. Large logistics occupancy can materially move an aggregate series without demonstrating demand for a shallow-bay building with limited power or truck circulation. The inference is subject-specific: verify functional competition rather than assume the regional change transfers uniformly. Colliers' Q2 2026 Chicago big-box report is explicitly a big-box universe and an earlier quarter. Its reported 5.6 million square feet of new leasing across 24 deals and 8.72% vacancy should not be spliced directly into an all-industrial series. [Colliers Chicago industrial big box, Q2 2026](https://www.colliers.com/en/research/chicago/chicago-industrial-big-box-market-report-2026-q2) ## Leasing is not occupancy yet A signed lease can begin after construction, tenant improvements, a prior tenant departure, or other delivery conditions. It can produce a headline transaction without current rent or absorption. The investor should separate signing, possession, completion, commencement, and collection. A relocation can create a new lease at one property and future vacancy at another. A renewal can preserve occupied area without increasing net absorption. A tenant expanding from one location while contracting elsewhere can have a different regional effect from the gross new lease size. Track the origin and destination of major transactions where public evidence allows. Avoid treating every signed square foot as new economic demand. For the subject property, identify actual qualified prospects, their required premises, timing, decision process, credit, and alternative locations. ## Inspect the pipeline by competitive relevance Map existing vacancy, underway speculative construction, build-to-suit projects, proposed supply, and known future move-outs. Assign actual status, expected delivery, preleasing, functional attributes, and evidence date. A proposed building without verified funding belongs in a different risk category from a nearly completed competitor. Compare clear height, loading, access, electrical capacity, office finish, parking, use, size, and location as appropriate to the property type. For office, include floor plate, systems, amenities, transit access, and landlord delivery capital. For retail, include customer access, visibility, co-tenancy, use rights, and trade-area demand. A new building can compete through better functionality even at higher face rent. Compare total occupancy cost and operational value to the tenant. Conversely, a small local-service tenant may not consider a large new logistics facility a substitute at any rent. Define the substitution mechanism rather than use a circular radius alone. ## Translate supply into an absorption budget Suppose a hypothetical competitive cohort has 200,000 square feet vacant and another 100,000 expected to deliver. An analyst assumes annual net demand of 60,000 square feet. Dividing 300,000 by 60,000 suggests five years to absorb the available amount under extremely simplified assumptions. That is a screening ratio, not a leasing forecast. It ignores future move-outs, rent adjustment, property differences, preleasing, other projects, and the subject's competitive share. A single large lease can change the result, especially in a small cohort. Preserve those limitations rather than present the quotient as a predicted stabilization date. Next estimate the subject's realistic share of relevant demand, required concessions, tenant delivery, and expense carry. A market with positive absorption can still produce a slow subject lease-up if the property is poorly configured or priced. A small well-suited property can lease despite a weak aggregate market when its specific alternatives are limited. ## Connect the findings to cash and financing Convert the leasing conclusion into dated rent, recoveries, operating costs, concessions, improvements, commissions, and capital. Do not increase the stabilized cap-rate value without funding the transition. A projected lease-up that requires two years of negative cash needs a real liquidity source. OCC commercial lending guidance provides a primary framework for examining market conditions, project feasibility, and repayment rather than relying only on collateral value. A lender and investor need evidence connecting the broad market to the proposed property's cash generation. [OCC CRE handbook](https://www.occ.treas.gov/publications-and-resources/publications/comptrollers-handbook/files/commercial-real-estate-lending/pub-ch-commercial-real-estate.pdf) Use separate cases for slower absorption and weaker effective rent. They can occur together but represent different mechanisms: more time without income and less income after occupancy. Test how both affect reserve burn, coverage, refinance timing, and exit value. ## Build a repeatable research note Archive each original report with the period, access date, provider, geography, definitions, and relevant page or table. Record revisions if later editions change prior data. Keep national context separate from Chicago totals and the subject's competitive cohort. Add an interpretation column explaining which underwriting assumption the evidence changes. If a report never affects the price, lease-up schedule, concession budget, capital, or decision, it may be background rather than transaction evidence. Label it accordingly. The final conclusion should state what the market data supports, what it does not establish, and what additional property-level evidence is required. Read the measures as a coherent system and then test the subject against real tenant alternatives. That process turns market headlines into a usable investment decision without manufacturing certainty from a regional average. ## Investigate an apparent contradiction before changing the thesis Suppose a report shows declining vacancy but a subject property's leasing broker reports fewer qualified tours. Several explanations are possible: large preleased deliveries may be occupied, the reported cohort may exclude the subject's size, an obsolete building may have left inventory, or the subject may be priced above its actual alternatives. Investigate the definitions and premises before deciding one source must be wrong. Create a small reconciliation table with market change, competitive-cohort change, subject activity, and evidence date. Ask whether each measure leads or lags cash. A signed transaction can precede possession, while an occupied building's collection problem may never appear in a vacancy statistic. The investor's cash forecast needs both market and operating evidence. Do not average incompatible numbers to create a seemingly balanced conclusion. A midpoint between direct vacancy and total availability has no established economic meaning. Use each measure for the question it answers, identify its limitations, and make the underwriting judgment explicit. Repeat the exercise when a new quarter arrives. Preserve the old report so revisions are visible, and explain which assumption changes. This produces a useful research trail rather than a series of favorable headlines selected to defend the purchase. ## Source registry - [CBRE — Chicago Industrial Figures Q3 2026](https://www.cbre.com/insights/figures/chicago-industrial-figures-q3-2026): accessed 2026-10-21 - [Colliers — Chicago industrial big box, Q2 2026](https://www.colliers.com/en/research/chicago/chicago-industrial-big-box-market-report-2026-q2): accessed 2026-10-21 - [OCC — Commercial Real Estate Lending handbook](https://www.occ.treas.gov/publications-and-resources/publications/comptrollers-handbook/files/commercial-real-estate-lending/pub-ch-commercial-real-estate.pdf): accessed 2026-10-21 ## Related resources - [A Chicago commercial investor’s guide to investment strategy](https://chicagocommercialfunding.com/learn/strategy/) - [Assessing submarket boundaries through tenant alternatives](https://chicagocommercialfunding.com/guides/assessing-submarket-boundaries-through-tenant-alternatives/) - [Building a commercial acquisition pipeline with brokers](https://chicagocommercialfunding.com/guides/building-a-commercial-acquisition-pipeline-with-brokers/)