HEALTHYBUILDINGSCIENCE is committed to facilitating the accessibility and usability of its website,, for everyone. HEALTHYBUILDINGSCIENCE aims to comply with all applicable standards, including the World Wide Web Consortium's Web Content Accessibility Guidelines 2.0 up to Level AA (WCAG 2.0 AA). HEALTHYBUILDINGSCIENCE is proud of the efforts that we have completed and that are in-progress to ensure that our website is accessible to everyone.

If you experience any difficulty in accessing any part of this website, please feel free to call us at (415) 785-7986 or email us at [email protected] and we will work with you to provide the information or service you seek through an alternate communication method that is accessible for you consistent with applicable law (for example, through telephone support).

Request an Inspection

Call us at (415) 785-7986 or click the button below to schedule your building health assessment.

Request a Site Visit

Sign up for our Quarterly newsletter

Subscribe to our e-mail newsletter to receive helpful updates and articles from Healthy Building Science.

Sign Up For Newsletter

We value your privacy.
Your email is never shared or sold.

Multifamily Affordable Housing San Francisco

From the Office of the Mayor of San Francisco

Mayor Edwin M. Lee today highlighted the housing progress in the Transbay Transit Center District ensuring San Francisco’s housing goal of 30,000 new and rehabilitated homes in the City by 2020, with at least one-third of those permanently affordable, and the majority within financial reach of the middle class remains on track.

“We are making measurable progress toward our ambitious 2020 housing goals, to build and rehabilitate more urgently-needed housing now and ensure that the majority of that housing is within reach of lower-income and middle class families,” said Mayor Lee. “As construction of the Transbay Transit Center progresses, we are beginning to achieve the vision of a vibrant mixed-use residential neighborhood where San Franciscans across the economic spectrum can afford to call home. Working together, we must recommit and redouble our efforts to expedite the construction of new housing at every level so we can continue investing in affordable and middle class housing.”

– Mayor Ed Lee 7/7/14

Transbay Block 6 Affordable Housing 8 Story Tower

Transbay Block 6 – Affordable Housing 8 Story Tower

Multifamily Project – Summary

Mercy Housing had the vision of creating a GreenPoint Rated affordable housing tower at Transbay Block 6. According to the City of San Francisco, 25% of the housing developed at the Transbay Transit Center must be low-income housing. The new 7-story tower will feature ~70+ affordable apartments.


Affordable Housing – Process

Healthy Building Science worked with the owner and design/build team to identify reasonable target credits for GreenPoint Rating (GPR). HBS provided drawing and specification review comments to ensure that GPR and owner goals for sustainability were included in the Construction Documents. HBS provided a kick-off meeting with the builder to ensure all credit tracking would occur as required by Build It Green, and made certain that all GPR site visits were scheduled. The project is presently in phase 1 construction of a project consisting of 147 new rentals units.

Affordable Housing Highlights:

  • GreenPoint Rated
  • Daycare Center
  • Playground
  • Vegetative roof
  • Solar thermal system

Project Team:

Architect: Solomon Cordwell Buenz

Affordable Housing San Francisco

Vegetative Rooftop – Affordable Housing San Francisco

Acoustical Consultant: Vibro-Acoustic Consultants

Builder: Balfour Beatty Cahil Construction joint venture

Civil Engineer: Urban Design Consulting Engineers

Green Building Consultant and GreenPoint Rater: Healthy Building Science

Landscape Architect: Outside

Owner/Manager: Mercy Housing California

Project Management: Project Management Advisors






Subscribe to our e-mail newsletter to receive helpful updates and articles from Healthy Building Science.

You have Successfully Subscribed!