Picture this: You’ve hit product-market fit.
Your Series A or B funding is in the bank. You’ve assembled a killer founding team, and your recruiting motion is firing on all cylinders. Business is humming—but your office space is bursting at the seams.
The "good problem" of scaling quickly comes with a high-stakes financial question: Exactly how much office space do we need to lease for the next few years?
Leasing an office is one of a startup’s largest fixed costs. If you underestimate, you’re cramped and unproductive within six months. If you overestimate, you’re burning runway on empty desks.
Here is the framework for navigating the office leasing question as a high growth company.
(And if you're renting space for the first time and need a crash course, check out our guide for first time office renters here).
How much office space do you need per person at your company?
While density varies by industry, the modern "Goldilocks" zone for high-growth tech companies is 125 to 150 square feet per person.
- 125 sq ft/person: Professional and functional, but can feel "cozy" (or cramped) if everyone is in at once.
- 150 sq ft/person: The "Happy Medium." This allows for comfortable desk spacing, internal breakout areas, and room to breathe.
The Scaling Cheat Sheet
Target Headcount Target Square Footage (@ 150 sq ft/head) 30 Employees 4,500 sq ft 50 Employees 7,500 sq ft 100 Employees 15,000 sq ft
What office factors will change the square footage that I need?
The math above covers standard desk work. However, Series A+ startups often have unique needs that require "flex" space. You’ll need to add 20–30% more square footage if your culture includes:
1. The All-Hands & Event Space
If you plan on hosting community events or weekly All-Hands meetings in-house, you can't just count desks. A dedicated "Town Hall" area essentially removes usable floor plan from daily working space. If you want a separate lounge or auditorium feel, plan for the higher end of the 150+ sq ft spectrum.
2. The "Quarterly Fly-In" Flex If you are a remote-first or hybrid team that brings everyone to HQ (San Francisco, NY, London) once a quarter, you have a choice:
Lease for the Peak: Pay for a 100-person office that sits half-empty 80% of the time.Lease for the Average: Lease for your local headcount (e.g., 50 people) and accept a "high-density" week when the full team is in town. This saves significant runway.
How smany meeting rooms do I need in my office?
As a team scales from 10 to 30+, "meeting room math" becomes your biggest headache. Without enough private space, your culture will suffer.
The Rule of Thumb: Plan for at least one meeting room for every 5 to 10 employees.
The Board Room: Necessary for investor updates and executive deep dives.The Huddle Room: Small 2-4 person pods for quick syncs.Phone Booths: These are a startup’s best friend. You can purchase modular phone booths to augment a space without needing a massive construction budget. They take the "Zoom call burden" off your conference rooms.
What term lengths should I expect?
The larger the office, the longer the commitment. Landlords generally won't offer "startup-friendly" 12-month leases for large floor plates.
Under 5,000 sq ft: You might find a 1–2 year term.Over 5,000–7,500 sq ft: Expect a 3-year minimum.
Because three years is a lifetime in startup land, you must sit down with your recruiting team now. If your hiring plan says you’ll be at 80 people in 24 months, don’t sign for a 30-person office today—you’ll be looking for a sub-tenant before the paint is dry.
How can I get out of my lease if I need to?
If you do outgrow your space faster than expected, you can sublease it. However, there is a catch: Marketability.
It is notoriously difficult to sublease an office that has less than 12 months left on the lease. Most incoming tenants want at least 18-24 months of stability. If you realize at the 18-month mark of a 3-year lease that you’re too big, that is the time to pull the trigger on a sublease move.
Summary: How to Start Your Search
Project your 24-month headcount (not just today’s).Multiply by 150 to get your target square footage.Audit your "Non-Working" needs: Do you need a stage? A commercial kitchen? A boardroom?Factor in the "Booth Buffer": Buy phone booths to save on square footage, or make sure you find a floorplan with enough rooms for your team.
And if you want an expert to help you think through any of the above, just reach out to our team at Tandem.
