Twelve new Costco stores land in one November month

As of November 5, 2026, the Costco opening schedule for the month runs to a dozen warehouses, and nine of them carry confirmed dates. South Meridian in Idaho opens today at roughly 200,000 square feet with 900 parking stalls and 16 fuel pumps; Vallejo in California relocates tomorrow into a 152,000 square foot building; Chandler in Arizona adds a Business Center on November 7; and four Canadian buildings follow between November 18 and November 23. For teams that map trade areas, the useful signal is not the number twelve but the pattern behind it: a chain paying for capacity in places where it already has members, not where it hopes to find them.

Nine dated openings, four of them in Canada

The geography matters more than the count. Four of the nine dated buildings are in Canada, and two of those sit within driving distance of each other in Alberta, where Edmonton opens on November 18 and Lloydminster on November 19. That is not a coincidence of scheduling; it is what happens when a chain decides a corridor can support two buildings and wants the second one open before the holiday rush rather than after it.

The American list is a mix of formats. Franklin, Wisconsin opens on November 25 as the first warehouse in Milwaukee County, which is a classic fill-in move: the members are already there, driving to older clubs, and the new building shortens their trip. Newport News, Virginia takes a different shape entirely, opening on November 24 as a fuel station only, with no warehouse behind it. That is a traffic play rather than an assortment play, and it tells you the company expects the membership base in that corridor to grow before the real estate does.

Vallejo trades a small warehouse for a larger one

The Vallejo project is the most instructive item on the list because it is a relocation, not an addition. A building that has traded for nearly four decades closes in November and the operation moves into 152,000 square feet, with fuel positions rising from 16 to 30 and electric vehicle charging added to the forecourt. Square footage and pump count are the two numbers that decide whether a relocation actually adds capacity, and here both move in the same direction.

Fuel pumps do the recruiting

Fuel is the cheapest customer acquisition tool a membership chain has. A member who fills up twice a month visits the site far more often than one who shops a big basket every three weeks, and every fill-up puts the entrance in front of a driver who may not be thinking about groceries. Going from 16 pumps to 30 is therefore not a convenience upgrade; it is a decision to convert the forecourt into the primary touchpoint and let the warehouse collect the basket that follows.

A November cluster is a trade area decision

Retailers rarely cluster openings by accident. A cluster spreads the fixed cost of regional marketing, shortens the distance a member will drive, and makes delivery and replenishment cheaper per unit because trucks run fuller routes. It also raises the cost of being wrong: when four buildings open within six weeks, a weak trade area shows up in the same quarter rather than being averaged away across a year.

Where the category growth is coming from

None of this would matter if the format were shrinking. The market trend behind these openings is that warehouse clubs keep taking share from conventional grocery, and the category growth is concentrated in fresh food, fuel and private label rather than in the centre store. Consumer demand has shifted toward fewer, larger trips, which raises the value of a building with 900 parking stalls and a forecourt that can serve thirty cars at once. The market size of the format keeps expanding because the trip pattern changed first, and real estate follows the trip pattern.

Read that table as a portfolio rather than a list. Two full warehouses in the same Alberta corridor, a Business Center in a metro that already has warehouses, a fuel-only site in Virginia and a county entry in Wisconsin are four different bets on the same proposition: that members will pay for proximity even when the assortment does not change. The formats differ because the constraint differs, and the constraint is almost always real estate rather than demand.

Four checks before signing a lease

The last check is the one most often skipped. A cluster makes individual buildings look better than they are for the first two quarters, because members from neighbouring sites migrate rather than new members appear. Measuring penetration inside the trade area, rather than total sales at the building, is the only way to tell the difference between a market that grew and a market that was merely rearranged.

• Count dated, not announcedNine of the twelve November buildings carry a date; the rest are intentions until a permit says otherwise.
• Relocation is capacity mathVallejo adds square footage and moves from 16 to 30 pumps, which is what makes a move worth the disruption.
• Clusters hide weak sitesNeighbouring members migrate first, so penetration by trade area beats sales by building as an early test.

For suppliers and retail teams watching this month, the practical takeaway is that a twelve-store month is a map, not a headline. Each opening mark sits on a trade area that someone modelled, and the formats chosen tell you what the chain thinks the constraint is: fuel where traffic is thin, a Business Center where small firms cluster, a full warehouse where families already drive past. Reading the pattern is more useful than counting the buildings, because the pattern is what repeats next year in a different set of cities.

FAQ

• How many Costco warehouses open in November 2026?

  A dozen are on the published schedule, and nine carry confirmed dates, including four in Canada.

• What is happening in Vallejo, California?

  A nearly 40-year-old warehouse closes and the operation moves into a 152,000 square foot building on November 6, with fuel positions rising from 16 to 30 and EV charging added.

• Why open a fuel station without a warehouse?

  A fuel-only site in Newport News builds visit frequency and membership awareness before the real estate for a full building is available.

• What should a supplier watch in a cluster of openings?

  Drive times and penetration inside each trade area, because migrating members can make a weak site look healthy for two quarters.

Sources

• Costco is opening 12 new stores — is one near you?
• Bay Area Costco getting larger as chain reshuffles its footprint
• Costco is closing this warehouse after nearly 40 years in November