How much is flex space rent per square foot?

The national average industrial asking rent was $10.32 per square foot NNN as of Q2 2026, per Cushman & Wakefield's U.S. Industrial MarketBeat Q2 2026. Set your rate by surveying what is actually leasing around you, not by picking a midpoint from a national range.

What does the national range actually tell you?

The $10 to $20 NNN range from WAReCRE's industrial space type comparison guide is a starting bracket, not a price. NNN, or triple net, is a lease structure where the tenant pays base rent plus their share of property taxes, insurance, and common area maintenance on top. That structure is standard in flex.

Markets diverge sharply inside that bracket. Greater Boston flex space averages approximately $21 per square foot, with some properties reaching $40 to $50 per square foot, according to Avison Young data cited by Banker & Tradesman. Dallas-Fort Worth flex averages $13 to $14 per square foot NNN, per Q4 2025 market data from Avondale Development Group. Columbus, Ohio flex first-year NNN lease rates reached $10.73 per square foot in 2026 year-to-date, up 1.8% year-over-year, per YourResearchResource's flex market rent growth analysis.

Those three markets span a 5x range. A national average tells you almost nothing about what your bays should lease for.

What do you need before you set a rate?

Before you put a number on a sign or a listing, collect four things.

• Asking rents from competing properties within a realistic drive of your site, pulled from LoopNet, CoStar if you have access, or direct calls to competing parks.
• Any recent lease comps your local broker can share, even informal ones.
• Your CAM cost per square foot so you know your floor. CAM, or common area maintenance, is the shared operating cost you pass through to tenants; if you do not know this number, see the existing article on how to calculate CAM charges for flex tenants.

There is no public occupancy series or reliable rent-comp feed covering the small-operator flex segment. Owners of the approximately 34,000 small flex properties must build their own comp set from assessor parcel files, permit records, and local broker data, per MMCG Analytics' small-bay flex industrial demand analysis. That is not a complaint; it is just the reality of this segment.

How do you build your own comp set?

1. List every flex park within five miles of your site. Pull addresses from Google Maps, county assessor parcel searches, or a quick LoopNet search filtered to industrial flex.
2. Record the asking rent, bay size, clear height, whether the bay has a roll-up door or loading dock, and whether the lease is NNN or gross for each comp.
3. Call two or three local industrial brokers. Ask what flex bays in your submarket are actually signing for, not just asking. Brokers will usually share this because it costs them nothing and builds goodwill.
4. Set your asking rate at or just above the midpoint of confirmed comps, then decide how much room you want to negotiate.

What should your comp survey checklist cover?

• Property name and address
• Bay size in square feet
• Clear height
• Roll-up door: yes or no, and how many per bay
• Loading dock access: yes or no
• Asking rent per square foot
• Lease type: NNN, modified gross, or gross
• Vacancy at that property if visible or reported
• Date you pulled the data

Update this list every six months. Asking rents shift with vacancy. Small-bay industrial vacancy nationally sat at 4.8% as of Q2 2026, the tightest of any size segment, per Cushman & Wakefield's U.S. Industrial MarketBeat Q2 2026. Tight vacancy gives you pricing power; rising vacancy means you need to watch comps more closely.

Hypothetical example

Hypothetical example. Your survey turns up four competing flex parks within four miles. Annual rent escalation clauses in flex leases have been averaging roughly 3.5% in markets such as Columbus, Ohio, per YourResearchResource's 2026 flex market rent growth report. A 3% annual step is a reasonable starting point to propose in your lease.

What are the common mistakes and edge cases?

The most common mistake is pricing off a national average without doing a local survey. The second is forgetting to separate asking rent from signed rent.

Season matters in some markets. Demand for small bays often picks up in late summer and early fall as contractors and small manufacturers plan for the next year. If you have a vacancy in July, you may get a better rate waiting until September than filling it immediately at a discount.

Watch the composition of available inventory. In Columbus, Ohio, average asking rents for available flex space declined to $10.21 NNN while first-year lease rates rose 1.8% year-over-year to $10.73 NNN. YourResearchResource's flex market rent growth analysis attributed that divergence to the composition of available inventory, with nearly half of available space built between 1980 and 1999. Older bays with lower clear heights or no roll-up doors drag the asking average down without reflecting what newer or better-maintained bays are actually signing for.

What should you measure going forward?

• Effective rent per square foot: total rent collected divided by total leasable square feet, measured monthly. This is your real number, not your asking rate.
• Vacancy rate by bay: number of vacant bays divided by total bays, updated monthly. Compare to the 4.8% small-bay national vacancy from Cushman & Wakefield's U.S. Industrial MarketBeat Q2 2026 as a rough benchmark for your segment.
• Days on market per vacancy: the number of days from a bay going vacant to a new lease signing. A rising trend tells you your rate or your marketing is off before your occupancy number moves.
• Rent per square foot at signing: record the actual signed rate for every new lease, not the asking rate. This is the only number that tells you where your market actually is.

Collect these from your own lease files and your comp calls. There is no feed that does it for you in this segment.

What should you do next?

1. Pull your current occupancy: count vacant bays and how long each has been empty.
2. List every competing flex park within five miles using Google Maps and LoopNet.
3. Record asking rent, bay size, clear height, roll-up door, and lease type for each comp.
4. Call one or two local industrial brokers and ask what flex bays are actually signing for in your submarket.
5. Calculate your CAM cost per square foot so you know your floor.
6. Set your asking rate at or just above the midpoint of active comps, not distressed ones.
7. Add an annual escalation clause to every new lease you write.
8. Repeat the comp survey every six months and track your own effective rent and days-on-market between surveys.