Multifamily vacancy is one of the most important numbers in the apartment market because it shows how much rental supply is sitting empty.
For renters, vacancy can affect negotiating power, concessions and rent increases. For landlords and investors, it affects occupancy, cash flow, rent growth and property value. A rising vacancy rate can signal that renters have more choices. A falling vacancy rate can signal that demand is absorbing available units and landlords may regain pricing power.
In 2026, multifamily vacancy is especially important because the apartment market is moving out of a large construction wave and into a slower-supply phase.
Key takeaways
- Multifamily vacancy measures the share of apartment units that are empty and available.
- CBRE reported U.S. multifamily vacancy fell to 4.8% in Q1 2026.
- Net absorption totaled 78,100 units in Q1, while completions fell 30% year over year.
- Average monthly rent rose 0.2% year over year to $2,217.
- Vacancy is local; national averages can hide very different metro conditions.
- Renters should watch vacancy and concessions together.
- Investors should watch vacancy, absorption, new supply and rent growth together.
What is multifamily vacancy?
Multifamily vacancy is the percentage of apartment units that are not occupied.
A simple example:
- 1,000 apartment units in a market
- 50 vacant units
- 5% vacancy rate
Vacancy can be measured for a building, a neighborhood, a metro area or the national apartment market. It can also vary by property class. A luxury apartment building in a supply-heavy market may have a higher vacancy rate than a more affordable property in the same city.
Vacancy is useful because it captures the balance between rental demand and available supply.
Why renters should care
Renters should care about vacancy because it affects leverage.
When vacancy is high, landlords may offer concessions to fill units. Those concessions can include free rent, waived fees, reduced deposits, parking discounts or more flexible lease terms.
When vacancy is low, renters may face fewer choices, faster leasing decisions and stronger rent increases.
That does not mean renters can negotiate only when vacancy is high. But it does mean the renter’s bargaining position is stronger when landlords are competing to fill empty units.
Why investors should care
Investors watch vacancy because vacant units do not generate rent.
A property with high vacancy may produce weaker net operating income, which can reduce cash flow and lower property value. Vacancy can also increase operating costs because owners may spend more on marketing, concessions and turnover.
A falling vacancy rate can be a positive sign if it reflects real renter demand. But investors should check whether occupancy is being supported by heavy concessions. A building can appear full while still earning less effective rent than expected.
What the 2026 data shows
CBRE reported that the U.S. multifamily vacancy rate fell by 20 basis points from Q4 2025 to 4.8% in Q1 2026, as net absorption outpaced construction completions for the first time in three quarters. CBRE also reported net absorption of 78,100 units, average monthly rent of $2,217 and construction completions down 30% year over year to 58,100 units.
That is an important shift. It suggests renter demand is beginning to absorb more of the apartment supply that came to market during the construction wave.
But it does not mean every apartment market is tight again. Some cities still have a large amount of new supply to lease, and concessions can remain common even as national vacancy improves.
Vacancy vs. absorption
Vacancy and absorption are related but not the same.
Vacancy shows what percentage of units are empty. Absorption measures how many units become occupied over a period.
A market can have positive absorption and still high vacancy if new supply is being delivered faster than renters are moving in. A market can also see vacancy fall if completions slow and demand remains steady.
That is why investors should not look at vacancy alone. They should compare current vacancy, net absorption, new construction deliveries, units under construction, concessions, rent growth and lease renewal rates.
Vacancy and rent growth
Lower vacancy often supports rent growth, but the relationship is not automatic.
CBRE reported that average monthly rent increased only 0.2% year over year in Q1 2026, even as vacancy fell. That suggests the market is improving, but landlords may still be cautious about pushing rents too aggressively.
A landlord may choose occupancy over rent growth, especially after a period of heavy supply. In some markets, owners may offer concessions to keep buildings full while waiting for demand to catch up.
What this means
For renters, multifamily vacancy is a clue. If vacancy is high and concessions are common, renters may have room to negotiate. If vacancy is falling and new supply is slowing, the window for the best deals may narrow.
For landlords, vacancy is a pricing signal. A full building at weak effective rents may not be as healthy as it looks. A partially vacant building with strong demand and limited new competition may recover faster.
For investors, vacancy is only one part of underwriting. The strongest analysis includes rent growth, operating expenses, debt costs, concessions, lease-up pace and future supply.
Multifamily vacancy is not just a statistic. It is a measure of bargaining power.
FAQ
What is multifamily vacancy?
Multifamily vacancy is the share of apartment units that are empty and available for rent.
What was the U.S. multifamily vacancy rate in Q1 2026?
CBRE reported that U.S. multifamily vacancy fell to 4.8% in Q1 2026.
Does lower vacancy mean rents will rise?
Not always immediately. Lower vacancy can support rent growth, but concessions, new supply and renter affordability still matter.
Why do investors watch vacancy?
Vacancy affects rental income, cash flow, property value and refinancing risk.
Why should renters watch vacancy?
Vacancy can affect how much leverage renters have when negotiating rent, concessions or renewal terms.
Sources with clickable URLs
- [CBRE — Q1 2026 U.S. Multifamily Figures](https://www.cbre.com/insights/figures/q1-2026-us-multifamily-figures)
- [CBRE — U.S. Multifamily Market Stabilizes as Apartment Demand Improves](https://www.cbre.com/press-releases/us-multifamily-market-stabilizes-as-apartment-demand-improves-and-new-construction-slows)
- [Zillow — May 2026 Rent Report](https://www.zillow.com/research/may-2026-rent-report-36461/)
- [Apartment List — National Rent Report](https://www.apartmentlist.com/research/national-rent-data)
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