Round Rock Office Space for Lease — What's Actually Available Right Now
Round Rock office leasing in 2026 is a tale of two markets — spec suites under 5,000 SF are leasing in 30-60 days, while larger blocks sit. Here's what's available and what to push for in an LOI.
If you’re looking for Round Rock office space right now, the market splits cleanly in two.
Spec suites under 5,000 SF along the I-35 corridor and Downtown are leasing fast — 30 to 60 days from list to signature. Larger blocks above 15,000 SF? Still slow. Sublease overhang is the comp, not direct.
That divergence changes how you should approach an LOI on either side.
Small footprint: move fast, hold rate
Spec-suite product in Round Rock is leasing at face rates roughly flat year-over-year. Concessions have trimmed by about half a month of free rent per year of term over the last twelve months. Landlords with spec-suite programs in Downtown Round Rock, along I-35, and on Sam Bass have a real waiting list.
If you’re a tenant under 5,000 SF, the leverage you had in 2023 is mostly gone. What you can still push for:
- A lease commencement date tied to substantial completion, not certificate of occupancy
- Cap on operating expense pass-throughs in year one
- Right of first refusal on adjacent suites — this is where landlords are most flexible
- Signage rights and after-hours HVAC included, not metered
What you should stop trying to push:
- Months of free rent. They’re not giving them on spec product right now.
- Above-market TI dollars. The build-out is already done.
Larger blocks: assume sublease
If you need 10,000 SF or more, your relevant comp set in Round Rock is sublease space — not direct landlord asking rates. Sublease available across Williamson County and the broader Austin MSA has compressed year-over-year, but blocks remain — and they’re priced 15 to 25 percent below comparable direct space for any term over 24 months.
The harder question is term. A sublease with 36 months remaining is not the same instrument as a direct lease, and the value isn’t just the rate spread. Confirm:
- Does the master tenant remain on the hook for default, or will the landlord recognize attornment?
- Can you negotiate a direct deal with the landlord at sublease expiration, and at what rate?
- How will tenant improvements be funded — by the sublessor, the master landlord, or you?
If those answers stack up, sublease can save real money. If they don’t, you’re buying a problem.
Owner-users: this is your window
A separate point: Round Rock office buildings for sale to owner-users are a different market right now. Cap rates are wider than 2021, financing for owner-occupants remains accessible, and the supply pipeline is constrained. For a business with stable space needs and a 7-plus year horizon, the math often beats leasing.
The buildings that work tend to be 4,000–15,000 SF with parking and signage, near Downtown, Sam Bass, or A.W. Grimes. The list is shorter than it looks — quiet, off-market opportunities are common.
How to use this
If you’re a tenant: identify your size band first, then decide whether direct, sublease, or purchase is the right path. The wrong path costs more than the wrong rate.
If you’re an owner sitting on a Round Rock building: the leasing comp set is more competitive than the headline vacancy rate suggests. Read the spec-suite leasing velocity, not the broad market average.
Active Round Rock listings are on the Round Rock submarket page and the latest Round Rock office market report goes deeper on the comp data. If you want a custom read on your specific need, send me a note.