Updated Aug 24, 2026
Exa Leases 40,000 Square Feet At Pioneer Building In San Francisco’s Mission District
3180 18th Street
Building Size
40,000 SF
Asset Type
Office
Closing
Aug 20, 2026
About this deal
AI
The Pioneer Building, located at 3180 18th Street in San Francisco, CA, is an office asset comprising approximately 40,000 square feet. This historic property, constructed in 1902, has seen various tech companies, including Stripe and OpenAI, as previous tenants, making it a notable site within the region's tech landscape.
Summary of transation details:
- Property Type: Office
- Transaction Amount: Not specified
- Address: 3180 18th Street
- Market: San Francisco, CA
- Landlord: Deborah Harmon - Artemis Real Estate Partners
- Tenant: Will Bryk & Jeff Wang - Exa
- Landlord's Representative: Charlie Hannafin - JLL
- Tenant's Representative: CBRE
AI startup Exa has entered into a lease for at least seven years at this location, taking over the property from Elon Musk’s xAI. This transaction highlights the ongoing commitment of the building to serve as a hub for the AI and tech industries in San Francisco.
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Purchase Price
Annual NOI
Loan Amount
Interest Rate (%)
Loan Term (yrs)
Down Payment (%)
Cap Rate
5.80%
Cash-on-Cash
-1.66%
Monthly Payment
$14,164
Annual Debt Svc
$169,964
Annual Cash Flow
$-11,334
DSCR
0.93