For Sale / Lease 4507 N Interstate 35, Austin, TX
4507 N Interstate 35, Austin, TX, 78722
Freestanding 4,753 SF office/retail building with IH-35 frontage in North-Central Austin
$3,300,000 (sale) · $38 - 42 SF/yr (NNN) (lease)
Williamson County · Office properties
Office Commercial Real Estate — Williamson County, TX
Williamson County office space for owners, investors, and tenants.
Williamson County office demand has bifurcated. Small-footprint professional services drive sub-5,000 SF leasing along the I-35 corridor while larger blocks above 15,000 SF face a sublease overhang. Spec suites lease in 45-60 days at face rates; concessions are tightening. Owner-user demand for well-located, parking-and-signage buildings remains active in Round Rock and Georgetown.
What I represent in office
- Owner-users acquiring small office buildings (3,000–20,000 SF) with parking and signage.
- Tenants seeking flexible-term office suites in Round Rock, Georgetown, Cedar Park, and Leander.
- Landlords leasing direct office space, repositioning sublease blocks, or pursuing spec-suite programs.
- Investors underwriting medical office, executive suite, and value-add office assets.
What the office market is doing
- Small-footprint tenants under 5,000 SF account for the majority of net absorption in Williamson County office.
- Sublease availability above 15,000 SF remains a structural drag — assume it as the relevant comp.
- Class A spec-suite product in established corridors is leasing in 30-60 days at face rates near flat YoY.
- Concessions have trimmed by roughly half a month of free rent per year of term over the last twelve months.
Available Inventory
Active office listings in Williamson County
For Sale / Lease 
For Lease 1930 Rawhide Drive, Round Rock, TX
1930 Rawhide Drive, Round Rock, TX, 78681
Professional office space with exceptional finish-out. Each suite has private offices with new finish-outs, kitchenette, and restroom.
$21.60 SF/yr (MG)
For Sale / Lease Henna House
309 W Main, Round Rock, TX, 78664
Offices For Lease In Historic Henna House
$2,800,000 (sale) · $20 - 24 SF/yr (NNN) (lease)
For Sale / Lease Axis Design Building
106 W Bagdad Ave, Round Rock, TX, 78664
For Lease or For Sale | Distinctive Historic Creative Office – Downtown Round Rock
$2,300,000 (sale) · $28 SF/yr (NNN) (lease)
For Sale Portsmouth Duplexes
21210 Portsmouth Cv, Lago Vista, TX, 78645
Fully leased income producing properties - Four (4) new construction Duplexes; Each side is 1,451 SF with 3 bed 2.5 bath, 2 car garage. Includes various amenities to docks, parks. Can be packaged with other units, from…
$3,600,000
For Sale Round Rock West Park #101-102
595 Round Rock West Drive Unit 101-102, Round Rock, TX, 78681
Two units (101 & 102) available together or separately; Rare opportunity for owner/user with two tenants in place, this is a great investment opportunity. Occupy one unit while other cash flows or wait for Leases to…
$300,000.00 EACH
For Lease Spanish Oaks Professional Plaza | Bldg. 1
13625 Ronald Reagan Blvd. Bldg. 1, Cedar Park, TX, 78660
Building 1 | Suite 100: First floor professional office condo with reception, 10 hard-walled offices, bull pen, conference room 3 ADA restrooms, breakroom. Upgraded finishes. Near retail. Perfect for medical, dental,…
$26 SF/yr (NNN)
For Lease 1608 Royston Ln, Round Rock, TX
1608 Royston Ln, Round Rock, TX, 78664
Value office/flex space in Royston Lane Business Park. 14 hard-walled offices, conference room, large bullpen area, common area breakroom and restrooms. Possible warehouse with grade level door. Perfect for engineer,…
$12.50 SF/yr (MG)
For Lease Grand Avenue Office Park Bldg. 1 & 4
821 Grand Avenue Parkway, Pflugerville, TX, 78660
Grand Avenue office park, professional office park campus. Beautiful grounds/landscaping along the Gilleland Creek. Gazebo and picnic areas, large trees. From E-Suites to larger office/retail, shared conference room…
$650 - 800 per month (NNN)
For Lease Highland Lakes Building
20500 Ranch to Market 1431, Lago Vista, TX, 78645
Beautiful Austin limestone and steel class A professional office building in heart of Lago Vista with great visibility, location and views. Creative space near retail and rooftops. Perfect for medical, attorney, real…
$700 - 5,000 per month (NNN; Gross)
For Lease Breakaway Park Office Condos #102
507 Denali Pass Drive, Cedar Park, TX, 78613
Executive Office Suites for Lease – Cedar Park, TX
$1,000 - 2,200 per month (MG)
For Sale 600 Round Rock West #303 & #304
600 Round Rock West Dr, Round Rock, TX, 78681
Rare chance to acquire a fully leased, income-producing office condo in one of Round Rock's most established suburban office corridors.
$575,000
For Sale 3906 Menchaca Rd, Austin, TX
3906 Menchaca Rd, Austin, TX, 78704
Fully leased absolute net medical office investment opportunity in South Austin. Cap Rate 5.5%.
$1,675,000
For Lease 201 North Heatherwilde Boulevard, Pflugerville, TX
201 North Heatherwilde Boulevard, Pflugerville, TX, 78660
Suite 503: 1,000 SF Sublease - 3 large offices, work/conference area, reception, kitchen and private restroom. - Stained concrete flooring, high ceilings with fans makes it ideal for small business, law, accounting,…
$21.50 SF/yr (NNN)
For Lease Bancorp South
661 W Central Texas Expy, Harker Heights, TX, 76548
Move-in ready Class B office space in a high-visibility former bank building on the Central Texas Expressway / I-14 corridor in Harker Heights. The space features 5 private offices, an open bullpen work area, 2…
$24 SF/yr (NNN)
For Lease 13625 Ronald W Reagan Blvd | Bldg. 5 | Suite 100
13625 Ronald W Reagan Blvd, Cedar Park, TX, 78613
Building 5 | Suite 100: A 2022 built professional suite in Spanish Oaks Professional Office Condo, a ten building campus on 6.6 acres fronting Ronald Reagan Boulevard in Cedar Park. The suite is currently operating as a…
$28 SF/yr (NNN)
For Lease 1100 Round Rock Ave, Round Rock, TX
1100 Round Rock Ave, Round Rock, TX, 78681
Common restrooms, break room, and waiting area for clients Street Signage available Tenants have 24-hour access Janitorial service provided at no additional cost
$900 per month (MG)
For Lease 103 S 12th St, Pflugerville, TX
103 S 12th St, Pflugerville, TX, 78660
- Elevator inside the building - Interior/exterior camera security system - Water softener in building - Door access system and plenty of parking - Tenant pays electric; Suites separately metered - Janitorial provided 2…
$17 - 25 SF/yr (MG)
Market Reports
Recent office market reports
- Round Rock Office, Q3 2026 Q3 2026 · Round Rock
- Austin Office, Q1 2026 Q1 2026 · Austin MSA
- Round Rock Office, Q1 2026 Q1 2026 · Round Rock
Frequently Asked
Common questions about office in Williamson County
- What is the average office lease rate in Round Rock?
- Direct asking rates for Class B office in Round Rock typically range from low-$20s to low-$30s per square foot on a full-service basis, with spec-suite product at the upper end of that range. Sublease space prices 15–25% below comparable direct space for blocks above 5,000 SF.
- Is now a good time to buy an owner-user office building in Williamson County?
- For owner-users with stable space requirements and a 7-plus year hold horizon, the current market is constructive: cap rates are wider than 2021 lows, financing is available for owner-occupants at competitive terms, and the supply pipeline is constrained. The decision is asset-specific — talk to a broker who can read the comp set.
- What is a spec suite?
- A spec suite (speculative suite) is a small office space — typically 1,500 to 5,000 SF — that a landlord has fully built out and furnished before a tenant signs. The tenant moves in within days rather than waiting 60-120 days for a custom buildout. Williamson County landlords with spec-suite product are leasing in 30-60 days at face rates.