SIP House ADU Redwood City CA

Location: Redwood City, CA

Project Information

Project Type: Residential, Tiny House < 900 sq. ft.
Manufacturer: Energy Panel Structures
Builder: Green Galaxy Builders
Design Professional: Green Galaxy Builders
Year Built: 2022


High Performance: No
HERS/EUI Index Score:
ACH50 - Blower Test Results:
CO2 lbs./sq.ft./year:

Client and Green Galaxy Builders asked SIPs to be incorporated in the design and construction of an Accessory Dwelling Unit (ADU).

SIP wall thickness and core material: 6" SIP Walls with EPS core
SIP roof thickness and core material: 10" SIP Roof Panels with EPS core

Utilizing SIPs on this project enabled a quicker permit because of exceeding the requirements of Cal Green and Title 24. Because the ADU was located in the back yard SIPs expedited the logistics of placement of the panels. All SIPs on this project were completed in 2-days.

The height of this ADU allowed for a loft for another bedroom.

HVAC system: HVAC was downgraded by 65%

All windows exceeded Cal Green requirements.

5KW solar panels were installed on the roof


Affiliated Members

Energy Panel Structures, Inc.
Graettinger, IA
Green Galaxy Builders, Inc.

Santa Clara, CA
Shell Building Systems
Moraga, CA


SIPA Website Sponsors