An expansion option gives the tenant the contractual right to lease additional specified space within the building or property at a predetermined rental rate or formula, during a defined window within the lease term. Unlike a ROFR or ROFO, the expansion option is entirely at the tenant's election and not contingent on the landlord's marketing activities or third-party interest.
By Angel Campa, Founder · Updated March 2026
Expansion options provide tenants with proactive growth optionality without requiring upfront commitment to the full space. For growing companies, the ability to lock in expansion space at today's rent — or at a defined escalation from today's rent — can be enormously valuable in rising market conditions. The key variables are the expansion rental rate (market rate vs. formula vs. same as existing rent), the exercise window (when the tenant may exercise and how long the option remains valid), and the condition of the expansion space (delivered as-is vs. with a tenant improvement allowance).
Negotiate the expansion rental rate at the lower of fair market rent or the tenant's existing rent escalated by a fixed percentage, preventing the landlord from pricing the option above market at the time of exercise. Include a defined build-out allowance for the expansion space comparable to the original premises allowance prorated for the remaining lease term. Negotiate the exercise window to open at least 12 months before the anticipated need date, and ensure the landlord must deliver the expansion space free of all existing tenants within 30–60 days of exercise.
Fixed-rent expansion options (rare, most tenant-favorable), market-rate expansion options (most common), expansion options with defined TI allowance, and expansion options limited to specific floor(s) or suite(s).
Lextract extracts these fields directly from your lease PDF when this clause is present:
Right of First Offer (ROFO)
A right of first offer (ROFO) gives the tenant the right to make the first offer to lease specified expansion space before the landlord markets that space to third parties.
Right of First Refusal (ROFR)
A right of first refusal (ROFR) gives the tenant the right to match any bona fide third-party offer the landlord receives for adjacent or specified expansion space before the landlord can lease that space to the third party.
Contraction Option
A contraction option — also called a reduction right or give-back right — gives the tenant the right to reduce the size of the leased premises at specified points during the lease term, typically by surrendering a defined portion of the space.
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