Standalone two-story office buildings for sale, with the land beneath them, on a boutique campus with full frontage on SH 121.
The missing middle
Lease a box you'll never own.
Buy a building you'll never fill.
Or…
Get your own office space for where you are today — and build for where you're going tomorrow. Buildings at 3,500 and 3,840 square feet.
Own the building and the land beneath it. Use it all yourself.
Say goodbye to
The freedom is all in your hands.
Location
Interurban sits on the corner of SH 121 and Dijon, with the whole north edge of the campus facing the Sam Rayburn Tollway. Your building is easy to find, seen every day, and minutes from the companies and districts that made this corridor North Texas's headquarters address.
Most office condos put you behind a building, off a side street. This site faces the tollway itself, so your clients see your name before they turn in, and your employees can tell people where they work in one sentence: SH 121 at Dijon.
Typical off-peak drive times, approximate.
Close to the people you do business with, and to the neighborhoods where your team and your clients live.
| 1 mile | 3 miles | 5 miles | |
|---|---|---|---|
| Population (2025) | 18,432 | 135,672 | 347,848 |
| Population growth, 2020–2025 | 18.0% | 13.1% | 14.4% |
| Households (2025) | 6,889 | 54,331 | 133,024 |
| Median household income | $139,986 | $122,709 | $127,587 |
| Daytime employees | 6,807 | 102,737 | 175,412 |
| Businesses | 925 | 10,862 | 19,726 |
| College degree or higher | 71% | 64% | 62% |
Third-party trade-area estimates for 4521 State Highway 121, Plano, TX 75024, for information only. Companies and destinations named are not affiliated with Interurban.
Why “Interurban”
A century ago, the interurban electric railway ran through Plano and tied the town to Dallas and the cities to the north. It made Plano a place people could work from. Interurban is the same idea a hundred years later: big-city character, built where you actually live.
Site plan & availability
Every building stands on its own lot, with its own front door, and faces a landscaped edge or an open lawn. Tap a building to see its size, price and status.
Illustrative site plan based on the preliminary civil layout. Not to scale. Building numbering, lot lines, parking and landscaping are subject to change and final approval. Combining adjacent buildings is subject to design and approval.
Signature buildings
Buildings at 3,500 and 3,840 square feet, with full two-story floor plates and the same square footage on both floors. No two share a front elevation.
Room for a substantial owner or C-level suite with real space and discretion, large conference areas, high-capacity open workspace, a kitchen, a run of private offices — arranged however you want them.
Full customization with our in-house architect and design team. A true one of one.
Built for
Renderings are artist's conceptions. Elevations, materials, landscaping and finishes are subject to change.
Floor plans
We stopped drawing a base plan. Nobody wanted one. Buyers arrive knowing how their company actually works, and the building gets drawn around that instead of the other way around.
How a building gets drawn
Tell us how your company works. Who needs a door and who needs a floor, where the client-facing space goes, what you want to walk into.
We draw your building to that and bring it back to you. Move it around as many times as it takes to get it right.
Once you're under contract, you work directly with the architect, designer and builder — down to the finishes and the fixtures.
Two examples of where that can land. Both are the 3,840 square foot building on the same 48' x 40' footprint with 12' ceilings — one organized around a central open space, the other opening a double-height atrium through the middle of it. Neither is a menu item. They are here to show how far one shell can move.
Symmetrical, organized around a central open space. Reception and a 22' x 13' conference room sit on the ground floor alongside a 28' x 17'-7" open workspace. Upstairs, five private offices, a CEO suite and a second conference room open off a central landing and the front balcony.
The same footprint opened up the middle. Stepped seating beside the stair for informal presentations, reception on axis with the entry, conference at the front right and open workspace behind. Upstairs, offices and a CEO suite ring the double-height volume at the core.
Thirteen buildings on the campus. No two of them have to be laid out alike.
Illustrative concept plans, not construction documents. Final design subject to approval.
In every building
Every building is a complete two-story building. Put the client-facing work downstairs and the quiet work up.
A private entry and your own street address. No lobby directory, no shared corridor, no one else's sign.
Not a shared amenity deck. Your own balcony off the front of your second floor.
You own the building and the parcel beneath it. Improve it, borrow against it, or sell it on your own timeline.
Surface parking steps from your entry, 151 spaces across the campus at one per 300 square feet. A private indoor garage is available.
Coffee in the morning and a second place to take a meeting, a short walk from your desk.
Standard features
Each building is delivered as a finished, professionally designed executive workplace. Everything but furniture is included in the purchase price, and these features attach to your purchase agreement as an addendum.
Upgrades are quoted and approved in writing before they're incorporated.
Final floor plans, plumbing fixture counts, vertical circulation and life-safety provisions are developed to comply with City of Plano building code and Texas Accessibility Standards.
Ownership
Interurban is sold fee simple. You aren't buying a suite or a condominium share of someone else's building. You're buying a building and the ground it stands on.
Make it your headquarters and put what you'd pay in rent toward equity in real estate your company owns.
Owner-occupants may qualify for SBA 504 financing, which can require a much smaller down payment than a conventional commercial loan.
Lease it to another business as an investment, or occupy it now and lease it later. Leasing is subject to the campus's governing documents.
Pricing is preliminary, excludes options and owner upgrades, and is subject to change. Financing eligibility, leasing rights and tax treatment depend on the governing documents and each buyer's circumstances. Consult your own legal, tax and financial advisors.
The café
A café treated as a destination rather than a transaction. As aesthetic as it is pure.
Made in-house, daily. Bread and pastry from scratch, coffee held to the same standard, and ingredients sourced as close to home as we can get them. A Class A experience in a place that doesn't usually get one.
Owned and operated by the developer's hospitality group.
Interurban owner perks
Menu and hours to be announced.
The team
Foundry Capital was formed around a simple idea: great real estate should have a sense of place. We don't want to build the same project twice. Every site gives us an opportunity to create something original.
A North Texas real estate company built on nearly two decades of work across corporate finance, analytics and real estate, having built and operated businesses on both the residential and commercial sides. Across brokerage, private equity and media, the mission is consistent: bring clarity, transparency and real financial context to real estate decisions.
A Frisco, Texas-based commercial real estate investment and development firm specializing in ground-up development, luxury office and mixed-use projects, and brand-integrated hospitality concepts. The firm structures and sponsors institutional-quality developments across Texas.
A Dallas general contractor building high-end commercial and residential work since 1999. Holz + Stein holds its commercial buildings to the finish you would expect inside a well-built luxury home, and runs an open-book process: every invoice and bank statement goes to the owner.
See workA Dallas firm offering full architectural services for new construction and renovation, in practice for roughly three decades. The work of principal Will Snyder is marked by a modern sensibility — clean massing, generous glazing, and buildings shaped by their site — and appears throughout Dallas's most design-conscious neighborhoods, including Highland Park, University Park and the Turtle Creek corridor.
Inquire
Tell us which building, or what size you're after, and we'll come back with pricing, plans and next steps.
4521 State Highway 121, Plano, TX 75024
SH 121 at Dijon St, West Plano.
Prefer to talk? (469) 294-9762
Info@FoundryCapitalRe.com