What $6.38 diesel and 4.4% retail vacancy actually mean for a boutique lease, a furniture truck and a second location

Record diesel prices are usually told as a trucking story. Commercial Observer reported this week that they are also a shopping-center story: fuel pushes up what it costs to build new retail space just as retailers are racing to open stores, and the result is a market where tenants have little room to bargain. The numbers behind that, and what they do to a small tenant, are below.

The two numbers

The U.S. Energy Information Administration put average on-highway diesel at $6.382 a gallon for the week of September 28, down 14.7 cents from the week before but still more than double the $2.628 of a year earlier. Commercial Observer, citing the same agency, says diesel averaged about $3.81 in late February, when the U.S.-Iran conflict began. That is a 67.5% increase ($6.382 divided by $3.81).

On the space side, the article cites a report putting total retail vacancy at 4.4% in the second quarter, with retailers taking more space than in any quarter since 2022. About 60 million square feet of retail is under construction, only 4% above the lowest level since CoStar began tracking 25 years ago, and fewer than 30% of the new sites are available to lease, according to CoStar data as quoted there. Analysts told the publication that retail rents have long lagged what it costs to build, so developers have little reason to start projects.

Put together: the space is scarce, the new supply is not coming, and the landlords with empty units know it.

A boutique renewing a lease: the leverage has moved to the landlord

Take a 2,000-square-foot shop paying $24 a square foot, or $48,000 a year. These are example figures, so swap in your own. A 5% renewal increase is $2,400 a year, and 10% is $4,800. In a market with 4.4% vacancy, a tenant who threatens to move has to find somewhere to go, and Commercial Observer notes that replacement retailers are snapping up second-generation space as it opens.

Do not read that as a reason to accept anything. Read it as a reason to start early. Open the renewal conversation 9 to 12 months before expiry, and ask for a longer term in exchange for a capped annual increase. A landlord who knows a vacancy would be hard to re-let may prefer a stable tenant at a modest bump to a gamble.

A furniture or appliance dealer with a box truck: fuel is a rent increase in disguise

Suppose a dealer runs one diesel delivery truck 400 miles a week at 8 miles per gallon. That is 50 gallons a week.

• At $3.81: 50 x $3.81 = $190.50 a week
• At $6.382: 50 x $6.382 = $319.10 a week
• Difference: $128.60 a week, or about $6,687 a year

Against the $48,000 lease above, that one truck has added the equivalent of a 13.9% rent increase ($6,687 divided by $48,000). The EIA's figure is a national average of retail diesel; a West Coast dealer is looking at $7.357. The dealer can look at its delivery charge, in case it is still priced for cheaper diesel, and at route bundling, since cutting a route of 400 miles to 320 saves about $3,319 a year (10 gallons a week x $6.382 x 52) at today's price.

A restaurant or shop owner planning a second location: second-generation space is the realistic road

If fewer than 30% of new retail sites are available to lease, a small operator is not competing for new construction. The deals are in space someone else is leaving, which Commercial Observer says is going quickly. That matters because there is a lot of competition: we count 112,779 independent retail stores, 109,039 independent grocery and convenience stores and 605,380 independent restaurants in our database of U.S. businesses with chains excluded, and every one of them is a possible tenant when an end-cap goes dark. Commercial Observer notes that discount chains are announcing store-opening plans, so a small tenant should expect competition.

That argues for being ready before a space appears: financials in order, a landlord-friendly offer sheet and a broker who will call you first. It also argues for checking the build-out budget twice, because the same diesel that is pushing up developers' costs raises the price of delivered materials for a tenant-improvement job.

What to actually do

• Tenants with a lease ending within 18 months: begin the renewal now and ask for a cap on annual increases, not just a lower starting number.
• Anyone running a diesel truck: price the fuel into your delivery charge this month. Do not wait for the national average to fall, since the EIA's next update is October 6 and a one-week dip of 14.7 cents does not undo a 67.5% rise.
• Owners who want a second site: line up your numbers and a broker now. Space may appear without warning, and the other bidder may be a chain with an opening plan.
• Owners who can do nothing yet: if your lease has years left and you do not deliver anything, this story is background. Your rent is fixed and your move is to keep the lease in good standing.

We have covered how diesel is reaching other trades in our earlier Main Street piece on record diesel and what the G7 diesel release changes in this one.

Sources: Commercial Observer, citing U.S. Census Bureau, CoStar and JLL research; U.S. Energy Information Administration, Gasoline and Diesel Fuel Update; independent business counts from The Company Chronicle's own database. Lease and truck figures are worked examples, not data. This is market information, not investment or legal advice.