21 Grant Ave
San Francisco, CA 94108 Union Square

21 Grant Ave offers approximately 1,403 square feet of flexible retail space in the heart of Union Square. This area is ideal for boutique retail, specialty concepts, or service-oriented businesses seeking a prime location surrounded by luxury brands and high foot traffic. Tenants will benefit from proximity to flagship stores, hotels, and cultural attractions, making it an excellent opportunity for visibility and customer engagement.

• Date available: Now
• Lease term: Negotiable
• Service type: To Be Determined
• Built out as: Standard Retail
• Space Type: Relet
• In Contiguous block: 9,378 SF

The ground floor features ±3,574 square feet of architecturally striking retail space with a generous ±27-foot frontage and soaring ceilings of approximately 13’10”. Positioned directly on Grant Avenue’s renowned retail corridor, this space is perfect for flagship retail, experiential showrooms, or high-end dining concepts. The location offers unmatched exposure to both local shoppers and international visitors, adjacent to luxury brands such as Saint Laurent, CH Carolina Herrera, Valentino, Dolce & Gabbana, Hermes, and more.

• Date available: Now
• Lease term: Negotiable
• Service type: To Be Determined
• Built out as: Standard Retail
• Space Type: Relet
• In Contiguous block: 9,378 SF

The second floor provides ±3,431 square feet of versatile space, suitable for retail, creative offices, or wellness concepts. With the option to lease separately or combine with other floors, tenants can tailor the space to their operational needs. The building’s landmark status and proximity to Union Square’s vibrant mix of global brands, hotels, and entertainment venues ensure a prestigious address and steady customer flow.

• Date available: Now
• Lease term: Negotiable
• Service type: To Be Determined
• Built out as: Standard Office
• Space Type: Relet
• In Contiguous block: 9,378 SF

The third floor at 23 Grant Ave offers approximately 3,299 square feet of full-floor office or retail space. This open plan layout features high hard-lid ceilings, large windows, and abundant natural light, creating an inviting environment for creative offices, boutique firms, or specialty retail. Tenants benefit from an en-suite restroom and the flexibility to customize the space to their operational needs, all within a boutique six-story building just steps from Union Square.

• Date available: Now
• Lease term: Negotiable
• Service type: To Be Determined
• Built out as: Standard Office
• Space Type: Relet

The fifth floor provides approximately 3,633 square feet of full-floor space, including an open plan with a dedicated conference room, high hard-lid ceilings, large windows, and a kitchenette. This floor is ideal for businesses seeking a collaborative environment with modern amenities, such as an en-suite restroom. Its prime location two blocks from Union Square ensures excellent access to restaurants, shopping, transit, and parking.

• Date available: Now
• Lease term: Negotiable
• Service type: To Be Determined
• Built out as: Standard Office
• Space Type: Relet

The sixth floor features approximately 3,431 square feet of full-floor space, offering large windows, high ceilings, and abundant natural light. This versatile space is suitable for office or retail use, providing tenants with a prestigious address in a vibrant, amenity-rich neighborhood near Union Square. The building’s boutique character and proximity to Market Street and public transit make it an attractive option for a wide range of businesses.

• Date available: Now
• Lease term: Negotiable
• Service type: To Be Determined
• Built out as: Standard Office
• Space Type: Relet