California Housing Growth & New Supply Report 2026
Where California’s housing stock is expanding, how the state measures new units, and why supply growth can matter to homeowners evaluating a future sale.
Updated September 2026. California’s housing conversation often focuses on prices, but the physical number and type of homes also changes every year. The California Department of Finance estimated population and housing for every city and county as of January 1, 2026 using its Housing Unit Method. That process incorporates Census benchmarks, new construction, demolitions, annexations and conversions. This report explains what those estimates reveal—and what they do not reveal—about local seller competition.
How California estimates its housing stock
The Department of Finance does not simply count active listings. Its Housing Unit Method starts with Census benchmarks and adjusts the housing stock using new construction, demolitions, annexations and conversions. Local jurisdictions supply annual housing-unit change information, while Census and administrative data help estimate occupancy and population.
This makes the DOF series useful for understanding structural supply growth. It is different from MLS inventory, which measures homes offered for sale. A city can add housing units while resale inventory remains tight, or have abundant resale listings without adding much new housing.
What changes the number of housing units?
| Supply factor | Effect | Why sellers should care |
|---|---|---|
| New construction | Adds units | Can increase future buyer choice |
| ADUs/conversions | Can add recognized housing | Changes density and property use |
| Demolitions | Removes units | Offsets part of new construction |
| Annexations | Moves units between geographies | Can affect city totals without physical construction |
| Vacancy/occupancy | Changes use, not necessarily total units | Influences population estimates and local demand context |
Growth is uneven across California
California’s 2026 estimates show that housing growth is not distributed evenly. Some inland and expanding suburban jurisdictions continue to add units at a faster percentage rate, while mature coastal cities may grow more slowly because land is constrained and redevelopment is more complex. Even within a county, one city can add substantial housing while a neighboring built-out community changes very little.
The DOF press release and tables also show examples of meaningful year-over-year differences among cities. In Los Angeles County, Burbank’s estimated housing units increased from 46,743 to 47,279, about 1.1%, while Lancaster increased from 57,373 to 58,127, about 1.3%. The City of Los Angeles increased from 1,586,581 to 1,597,841 housing units, about 0.7%. These are estimates of total housing units, not home-sale counts.
Why housing growth can matter to existing homeowners
New supply can affect the competitive landscape over time. A large pipeline of new condominiums may give buyers alternatives to older resale units. New detached subdivisions can compete with existing homes on energy efficiency and condition. At the same time, new construction can signal strong household demand, infrastructure investment and job growth. Supply growth is therefore not automatically negative for existing-home values.
The relevant question is what type of housing is being added and whether it competes with the seller’s property. A new luxury apartment building is not a direct substitute for a detached starter home. A tract of new three-bedroom houses may be more relevant to a nearby resale subdivision.
Population growth and housing growth should be read together
Housing demand depends on households, not simply unit counts. DOF’s population estimates use administrative data including births, deaths, address changes, tax records, Medicare and Medi-Cal enrollment, school enrollment and other sources. County and city population estimates are aligned through established demographic methods.
If housing units grow faster than households, vacancy conditions can change. If household formation outpaces supply, competition for housing can remain intense. Neither relationship should be reduced to a one-year ratio, but the two series together provide a stronger picture than either alone.
Seller guide: using supply data locally
1. Identify competing property types
Look at what is actually being built near the property. New apartments, townhomes, detached homes and ADUs affect different segments of demand.
2. Compare new construction with resale inventory
DOF housing growth and MLS inventory answer different questions. Use structural supply to understand the long-term market and active listings to understand today’s competition.
3. Consider the age advantage
New homes may compete on energy efficiency and modern systems, while older homes may offer larger lots, established neighborhoods or distinctive architecture. Sellers should emphasize genuine advantages rather than trying to imitate new construction.
4. Watch incentives in new developments
Builders can sometimes offer financing or upgrade incentives that do not appear directly in the headline price. Nearby resale sellers should consider the complete buyer proposition when comparing competition.
5. Keep citywide growth in perspective
A city adding thousands of units does not mean every neighborhood experiences the same change. Map nearby projects and compare the likely buyer audience.
Where this report can expand
Future editions can rank counties and large cities by absolute and percentage housing-unit growth, compare 2020–2026 supply expansion, and separate single detached, attached, multifamily and mobile-home categories where the source data supports it. Those comparisons are particularly useful because they create original analysis from an authoritative statewide dataset rather than repeating generic market commentary.
For homeowners, the practical value is understanding whether their market is structurally adding supply and how that supply differs from the home they intend to sell.
Frequently asked questions
Is housing-unit growth the same as homes listed for sale?
No. Housing-unit estimates measure the physical housing stock. For-sale inventory measures properties currently offered on the resale market.
Does more construction reduce home values?
Not necessarily. New supply can increase buyer choice, but construction may also occur where demand is strong. Effects vary by property type, location and price range.
Where does California get its housing estimates?
The Department of Finance combines Census benchmarks with local construction, demolition, annexation, conversion and administrative information through its Housing Unit Method.
Are 2026 figures final?
DOF describes January 1, 2026 E-1/E-5 figures as provisional estimates. They should be cited as estimates rather than exact counts.
Seller resources
Homeowners comparing new supply with resale options can review where we buy across California and how our direct-sale process works.
Methodology and sources
Primary source links: California Association of REALTORS® market data, U.S. Census Bureau / American Community Survey, and California Department of Finance population and housing estimates. The applicable source and data period for each statistic are described below.
Primary sources are the California Department of Finance E-1 Population and Housing Estimates for Cities, Counties and the State—January 1, 2025 and 2026—and E-5 Population and Housing Estimates for Cities, Counties and the State, 2020–2026. DOF notes that data timeliness and coverage vary and that adjustments may be applied.
See our California Housing & Home Seller Report, browse the Reports Directory, visit Reports & Research, or return to Cash Home Buyers CA.