Perlita Passive house


  • Building Type : Isolated or semi-detached house
  • Construction Year : 2017
  • Delivery year : 2017
  • Address 1 - street : 4324 Perlita Avenue CA 90039 LOS ANGELES, USA
  • Climate zone : [Csa] Interior Mediterranean - Mild with dry, hot summer.

  • Net Floor Area : 197 m2
  • Construction/refurbishment cost : 540 000 €
  • Cost/m2 : 2741.12 €/m2

Certifications :

  • Primary energy need :
    81.3 kWhpe/m2.year
    (Calculation method : Other )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

The goal of the Perlita Project is to show a new path for low energy consumption buildings in Los Angeles and in Southern California through realistic, affordable and reproducible solutions.

The main focus was the energy efficiency. We followed the PassiveHouse standard path, which is the leading international low energy building standard with more than 85,000 buildingsaround the globe in all climate zones, to deliver ahigh level of comfort with very low energy consumption.

This strategy allowed us to design a site Net Zero Energy, fossil fuel free house, with only 12 solar panels; 4 panels were added to supply all the required electricity for the annual consumption of an electric car used for most of the home owners’ local commute. A storage battery allows to shave peak hours demand.

Of course, the project was designed to be water conscious with only low water consumption fixtures, adrought tolerant landscaping and arain garden. Black water and grey water pipes were also separated to easily use the grey water for the yard.

After the first 12 months of operation, the house is one of the most energy efficient building in Los Angeles with a verified site EUIbelow 39 kWh/m²/yr, which is the maximum total energy consumption allowed for a Passive House. Both certification from the Passive House Institute and from the Living BuildingChallenge are in progress.

This project should be the beginning of a new construction paradigm; more than 300 people already toured the house. 

See more details about this project

Data reliability

3rd part certified

Photo credit

Pictures: Xavier Gaucher



    Xavier Gaucher - - 4324 Perlita Avenue, Los Angeles CA 90039 - tel: +1 626 524 0505

Construction Manager


    Xavier Gaucher - - 4324 Perlita Avenue, Los Angeles CA 90039 - tel: +1 626 524 0505




    Eve Reynolds - - tel: +1 818 915 2219




    Alain Renk - - tel: +33 6 20 80 92 60

    Design Architect

    Assistance to the Contracting Authority

    Nico design

    Matt Bahrami - - tel: +1 310 490 5445

    General Contracting Consultant

    Environmental consultancy

    Verdical Group

    Drew Shula - - tel: +1 818 390 4943

    Living Building Challenge Certification

    Thermal consultancy agency

    Passive House Institute

    Javier Florez - - tel: +49 6151 82699 32

    Passive House consulting to ePHiciency + PH Certification (in progress)



    Tony Paradowski - - tel: +1 323 867 4705

    Landscaping design

Contracting method

Build and sell construction

Owner approach of sustainability

The goal of the Perlita Project is to show a new path for low energy consumption buildings in Los Angeles and in Southern California through a realistic, affordable and reproducible solutions which will become the standard in the near future with the new rules which will apply, but also because this is the proper way to build. The Perlita Project is the first Passive House project completed in Los Angeles.

Architectural description

Modern design respecting the vernacular architectural style; Keeping the scale of the existing surrounding houses & Open towards the local community. 

If you had to do it again?

For our next project, we will make sure to use Passive House solutions which have been validated by experienced Passive House crews; We will also make sure our architect has experience in Passive House design and therefore for the Passive House principles to be integrated as well as possible into the building design; Lastly we will make sure to have every construction details and MEP systems to be 100% design before starting the construction phase, because decisions we made on site were not as efficient and cost effective that the one we would have thought about before the construction phase.

Building users opinion

Great comfort, indoor air quality and noise reduction from outside noise; And all that without any energy bill!

Energy consumption

  • 81,30 kWhpe/m2.year
  • 296,00 kWhpe/m2.year
  • Other

  • 39,00 kWhfe/m2.year
  • House: 7784 kWh for 12 months
    Electric Vehicle Charger: 1567 kWh for 12 months

    We finished the first year with $230 energy credit - Energy bills available upon request

  • 300,00 kWhpe/m2.year


    • Heat pump
    • Heat pump
    • VRV Syst. (Variable refrigerant Volume)
    • Nocturnal ventilation
    • Double flow
    • Solar photovoltaic
    • Heat pump
  • 10 071,00 %
  • 13.5 kWh Storage battery - 12 Solar Panels for the house consumption; 4 for the Electric Vehicle.


    Windows & Doors


    tel: +1 303 578 0001

    Second œuvre / Menuiseries extérieures

    A complete range of high efficiency & airtight doors, windows, sliding glass doors

    NFRC and PHI rated

Construction and exploitation costs

  • 540 000

Urban environment

The house in located in the Atwater Village district of Los Angeles, a fully developed area.

Land plot area

711,00 m2

Built-up area

0,24 %

Green space


Parking spaces


Building Environmental Quality

  • indoor air quality and health
  • acoustics
  • comfort (visual, olfactive, thermal)
  • energy efficiency
  • renewable energies
  • ​comfort with very low energy consumption: 39 kWh/m²/yr
  • only 12 solar panels
  • black water and grey water pipes separated

Contest categories

Energy & Temperate Climates

Energy & Temperate Climates

Users' Choice

Users' Choice

Green Solutions Awards 2019 - Buildings

Author of the page

  • Xavier Gaucher


  • Other case studies



    Green Solutions Awards 2019 - Buildings