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444 Castro Street 444 Castro St 1,490 - 47,004 SF of 4-Star Office Space Available in Mountain View, CA 94041
Highlights
- Well Health & Safety Rated Building & Certified Leed Gold Building with Responsive, local ownership
- Common area conference room-free of charge for tenants and new fitness center with showers and lockers
- Onsite property management, engineers and building security 24/7
- $2.75 estimated operating expenses to Full Service
- Free garage parking of 2.52/1000 with 10 EV charges in the garage
- Beautiful outdoor courtyard and communal gathering area
All Available Spaces(5)
Display Rental Rate as
- Space
- Size
- Term
- Rental Rate
- Space Use
- Build-Out
- Available
As is. Available 08/01/2026. Multi-million-dollar renovation with on-site amenities including: common conference room, fitness room with showers and lockers, 10 EV chargers in the garage, outdoor communal area, banking and retail, property management and engineering on-site, 24/7 security. Walking Distance to Great Downtown Amenities.
- Lease rate does not include utilities, property expenses or building services
- Mostly Open Floor Plan Layout
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
Class A office space. 41,707 sf available by combining the 5th, 6th, 8th, and 9th floors. Open ceiling tech buildout. Full floor available. Multi-million-dollar renovation with on-site amenities including: common conference room, fitness room with showers and lockers, 10 EV chargers in the garage, outdoor communal area, banking and retail, property management and engineering on site, 24/7 security. Parking is underground and free. WELL Health Safety Rated building. Certified LEED Gold. $2.7 OpEx. to full service
- Lease rate does not include utilities, property expenses or building services
- Mostly Open Floor Plan Layout
- Can be combined with additional space(s) for up to 20,886 SF of adjacent space
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
Floor in the process of being demised with flexible sizes. Class A office space. 41,707 sf available by combining the 5th, 6th, 8th, and 9th floors. Full floor available. Multi-million-dollar renovation with on-site amenities including: common conference room, fitness room with showers and lockers, 10 EV chargers in the garage, outdoor communal area, banking and retail, property management and engineering on site, 24/7 security. Parking is underground and free. WELL Health Safety Rated building. Certified LEED Gold. $2.75 OpEx. to full service
- Lease rate does not include utilities, property expenses or building services
- Mostly Open Floor Plan Layout
- Space is in Excellent Condition
- Fully Built-Out as Standard Office
- 1 Conference Room
- Can be combined with additional space(s) for up to 20,886 SF of adjacent space
Full floor available. Multi-million-dollar renovation with on-site amenities including: common conference room, fitness room with showers and lockers, 10 EV chargers in the garage, outdoor communal area, banking and retail, property management and engineering on site, 24/7 security. Parking is underground and free. WELL Health Safety Rated building. Certified LEED Gold. $2.75 OpEx. to full service
- Lease rate does not include utilities, property expenses or building services
- Mostly Open Floor Plan Layout
- 2 Conference Rooms
- Finished Ceilings: 10’
- Private Restrooms
- Fully Built-Out as Standard Office
- 12 Private Offices
- 12 Workstations
- Can be combined with additional space(s) for up to 20,821 SF of adjacent space
Class A Office Space. 41,707 sf available by combining the 5th, 6th, 8th, and 9th floors. Full floor available. Multi-million-dollar renovation with on-site amenities including: common conference room, fitness room with showers and lockers, 10 EV chargers in the garage, outdoor communal area, banking and retail, property management and engineering on site, 24/7 security. Parking is underground and free. WELL Health Safety Rated building. Certified LEED Gold. $2.75 OpEx. to full service
- Lease rate does not include utilities, property expenses or building services
- Mostly Open Floor Plan Layout
- 2 Conference Rooms
- Finished Ceilings: 11’
- Private Restrooms
- Fully Built-Out as Standard Office
- 2 Private Offices
- 20 Workstations
- Can be combined with additional space(s) for up to 20,821 SF of adjacent space
| Space | Size | Term | Rental Rate | Space Use | Build-Out | Available |
| 3rd Floor, Ste 320 | 5,297 SF | Negotiable | $85.55 CAD/SF/YR $7.13 CAD/SF/MO $453,180 CAD/YR $37,765 CAD/MO | Office | Full Build-Out | 2026-08-01 |
| 5th Floor, Ste 500 | 10,414 SF | Negotiable | $126.29 CAD/SF/YR $10.52 CAD/SF/MO $1,315,226 CAD/YR $109,602 CAD/MO | Office | Full Build-Out | 2026-11-01 |
| 6th Floor, Ste 600 | 1,490-10,472 SF | Negotiable | $126.29 CAD/SF/YR $10.52 CAD/SF/MO $1,322,551 CAD/YR $110,213 CAD/MO | Office | Full Build-Out | 2026-07-01 |
| 8th Floor, Ste 800 | 10,413 SF | Negotiable | $126.29 CAD/SF/YR $10.52 CAD/SF/MO $1,315,099 CAD/YR $109,592 CAD/MO | Office | Full Build-Out | 2026-07-01 |
| 9th Floor, Ste 900 | 10,408 SF | Negotiable | $126.29 CAD/SF/YR $10.52 CAD/SF/MO $1,314,468 CAD/YR $109,539 CAD/MO | Office | Full Build-Out | 2026-07-01 |
3rd Floor, Ste 320
| Size |
| 5,297 SF |
| Term |
| Negotiable |
| Rental Rate |
| $85.55 CAD/SF/YR $7.13 CAD/SF/MO $453,180 CAD/YR $37,765 CAD/MO |
| Space Use |
| Office |
| Build-Out |
| Full Build-Out |
| Available |
| 2026-08-01 |
5th Floor, Ste 500
| Size |
| 10,414 SF |
| Term |
| Negotiable |
| Rental Rate |
| $126.29 CAD/SF/YR $10.52 CAD/SF/MO $1,315,226 CAD/YR $109,602 CAD/MO |
| Space Use |
| Office |
| Build-Out |
| Full Build-Out |
| Available |
| 2026-11-01 |
6th Floor, Ste 600
| Size |
| 1,490-10,472 SF |
| Term |
| Negotiable |
| Rental Rate |
| $126.29 CAD/SF/YR $10.52 CAD/SF/MO $1,322,551 CAD/YR $110,213 CAD/MO |
| Space Use |
| Office |
| Build-Out |
| Full Build-Out |
| Available |
| 2026-07-01 |
8th Floor, Ste 800
| Size |
| 10,413 SF |
| Term |
| Negotiable |
| Rental Rate |
| $126.29 CAD/SF/YR $10.52 CAD/SF/MO $1,315,099 CAD/YR $109,592 CAD/MO |
| Space Use |
| Office |
| Build-Out |
| Full Build-Out |
| Available |
| 2026-07-01 |
9th Floor, Ste 900
| Size |
| 10,408 SF |
| Term |
| Negotiable |
| Rental Rate |
| $126.29 CAD/SF/YR $10.52 CAD/SF/MO $1,314,468 CAD/YR $109,539 CAD/MO |
| Space Use |
| Office |
| Build-Out |
| Full Build-Out |
| Available |
| 2026-07-01 |
3rd Floor, Ste 320
| Size | 5,297 SF |
| Term | Negotiable |
| Rental Rate | $85.55 CAD/SF/YR |
| Space Use | Office |
| Build-Out | Full Build-Out |
| Available | 2026-08-01 |
As is. Available 08/01/2026. Multi-million-dollar renovation with on-site amenities including: common conference room, fitness room with showers and lockers, 10 EV chargers in the garage, outdoor communal area, banking and retail, property management and engineering on-site, 24/7 security. Walking Distance to Great Downtown Amenities.
- Lease rate does not include utilities, property expenses or building services
- Fully Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- Space is in Excellent Condition
5th Floor, Ste 500
| Size | 10,414 SF |
| Term | Negotiable |
| Rental Rate | $126.29 CAD/SF/YR |
| Space Use | Office |
| Build-Out | Full Build-Out |
| Available | 2026-11-01 |
Class A office space. 41,707 sf available by combining the 5th, 6th, 8th, and 9th floors. Open ceiling tech buildout. Full floor available. Multi-million-dollar renovation with on-site amenities including: common conference room, fitness room with showers and lockers, 10 EV chargers in the garage, outdoor communal area, banking and retail, property management and engineering on site, 24/7 security. Parking is underground and free. WELL Health Safety Rated building. Certified LEED Gold. $2.7 OpEx. to full service
- Lease rate does not include utilities, property expenses or building services
- Fully Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 20,886 SF of adjacent space
6th Floor, Ste 600
| Size | 1,490-10,472 SF |
| Term | Negotiable |
| Rental Rate | $126.29 CAD/SF/YR |
| Space Use | Office |
| Build-Out | Full Build-Out |
| Available | 2026-07-01 |
Floor in the process of being demised with flexible sizes. Class A office space. 41,707 sf available by combining the 5th, 6th, 8th, and 9th floors. Full floor available. Multi-million-dollar renovation with on-site amenities including: common conference room, fitness room with showers and lockers, 10 EV chargers in the garage, outdoor communal area, banking and retail, property management and engineering on site, 24/7 security. Parking is underground and free. WELL Health Safety Rated building. Certified LEED Gold. $2.75 OpEx. to full service
- Lease rate does not include utilities, property expenses or building services
- Fully Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- 1 Conference Room
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 20,886 SF of adjacent space
8th Floor, Ste 800
| Size | 10,413 SF |
| Term | Negotiable |
| Rental Rate | $126.29 CAD/SF/YR |
| Space Use | Office |
| Build-Out | Full Build-Out |
| Available | 2026-07-01 |
Full floor available. Multi-million-dollar renovation with on-site amenities including: common conference room, fitness room with showers and lockers, 10 EV chargers in the garage, outdoor communal area, banking and retail, property management and engineering on site, 24/7 security. Parking is underground and free. WELL Health Safety Rated building. Certified LEED Gold. $2.75 OpEx. to full service
- Lease rate does not include utilities, property expenses or building services
- Fully Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- 12 Private Offices
- 2 Conference Rooms
- 12 Workstations
- Finished Ceilings: 10’
- Can be combined with additional space(s) for up to 20,821 SF of adjacent space
- Private Restrooms
9th Floor, Ste 900
| Size | 10,408 SF |
| Term | Negotiable |
| Rental Rate | $126.29 CAD/SF/YR |
| Space Use | Office |
| Build-Out | Full Build-Out |
| Available | 2026-07-01 |
Class A Office Space. 41,707 sf available by combining the 5th, 6th, 8th, and 9th floors. Full floor available. Multi-million-dollar renovation with on-site amenities including: common conference room, fitness room with showers and lockers, 10 EV chargers in the garage, outdoor communal area, banking and retail, property management and engineering on site, 24/7 security. Parking is underground and free. WELL Health Safety Rated building. Certified LEED Gold. $2.75 OpEx. to full service
- Lease rate does not include utilities, property expenses or building services
- Fully Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- 2 Private Offices
- 2 Conference Rooms
- 20 Workstations
- Finished Ceilings: 11’
- Can be combined with additional space(s) for up to 20,821 SF of adjacent space
- Private Restrooms
Property Overview
41,707 sf available by combining the 5th, 6th, 8th, and 9th floors. Office building located in Downtown Mountain View. Property was built in 1971 and renovated in 2001. Certified Leed Gold Building, responsive local ownership, new fitness center, new showers with lockers, free parking of 2.52/1000, bicycle parking, 10 EV charges in the garage. Onsite property management and building security 24/7. 2026 operating expenses are $2.75 to Full Service.
- 24 Hour Access
- Banking
- Controlled Access
- Courtyard
- Fitness Center
- Property Manager on Site
- Security System
- Car Charging Station
- Outdoor Seating
- Fire Pits
- Air Conditioning
- On-Site Security Staff
Property Facts
Sustainability
Sustainability
LEED Certification Developed by the U.S. Green Building Council (USGBC), the Leadership in Energy and Environmental Design (LEED) is a green building certification program focused on the design, construction, operation, and maintenance of green buildings, homes, and neighborhoods, which aims to help building owners and operators be environmentally responsible and use resources efficiently. LEED certification is a globally recognized symbol of sustainability achievement and leadership. To achieve LEED certification, a project earns points by adhering to prerequisites and credits that address carbon, energy, water, waste, transportation, materials, health and indoor environmental quality. Projects go through a verification and review process and are awarded points that correspond to a level of LEED certification: Platinum (80+ points) Gold (60-79 points) Silver (50-59 points) Certified (40-49 points)
ENERGY STAR® Energy Star is a program run by the U.S. Environmental Protection Agency (EPA) and U.S. Department of Energy (DOE) that promotes energy efficiency and provides simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. Thousands of industrial, commercial, utility, state, and local organizations partner with the EPA to deliver cost-saving energy efficiency solutions that protect the climate while improving air quality and protecting public health. The Energy Star score compares a building’s energy performance to similar buildings nationwide and accounts for differences in operating conditions, regional weather data, and other important considerations. Certification is given on an annual basis, so a building must maintain its high performance to be certified year to year. To be eligible for Energy Star certification, a building must earn a score of 75 or higher on EPA’s 1 – 100 scale, indicating that it performs better than at least 75 percent of similar buildings nationwide. This 1 – 100 Energy Star score is based on the actual, measured energy use of a building and is calculated within EPA’s Energy Star Portfolio Manager tool.
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444 Castro Street | 444 Castro St
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