My House
Passive houses in CLT timber · Portugal

Wooden passive houses that run themselves.

Kozy builds low-energy homes from cross-laminated timber, with home automation we design ourselves. Simulate yours in ten questions and get an indicative price.

Kozy Carvalho · T3 · 110 m²Illustration
≤ 15kWh/m²·yrHeating demand, Passivhaus target
≤ 0.6h⁻¹ @50 PaAirtightness target (n50)
≈ 0.35t CO₂/m²Carbon stored in the timber (estimate)
2–4weeksOn-site assembly of the shell (target)
How we build

Three ideas, one house

Passivhaus

Passive by design

A thick insulated envelope, triple glazing, airtight construction and heat-recovery ventilation. The house stays warm in winter and cool in summer on very little energy.

CLT · cross-laminated timber

Built from wood

Walls, floors and roof are CLT panels cut in the factory and assembled on site. Timber stores carbon, goes up fast and makes warm, healthy rooms.

KNX · Matter · Home Assistant

Automated from day one

Shading, ventilation, heating, lighting and solar run on one system we design ourselves, on open standards. The house adapts to the weather and to you.

Your house in ten questions

One choice per step. Watch your house go up from the foundations to the solar panels, then create your account to get your estimate and follow your project.

  1. 01 The plot
  2. 02 Foundations
  3. 03 CLT walls
  4. 04 Upper floor
  5. 05 Roof
  6. 06 Cladding
  7. 07 Windows and finishes
  8. 08 Automation
  9. 09 Equipment
  10. 10 Garden

From first sketch to keys

  1. Simulate

    Answer ten questions online and get an indicative price.

  2. Site visit

    We visit your plot, check access, orientation and soil, and confirm feasibility.

  3. Design and permit

    Our architect adapts the plans and files the building licence with the Câmara Municipal.

  4. Factory

    CLT panels are cut to the millimetre, with openings and service routes prepared.

  5. Assembly

    On a prepared foundation the shell goes up in a few weeks, then our partners finish the interior.

  6. Handover

    We commission the automation, test airtightness, and walk you through your house.

Planned · dates to be confirmed

Our first houses, near Fátima

We are building our first prototypes on our own land in the Centro region. They will be open to visit, so you can feel the comfort of a passive wooden home before you decide.

39.63° N · 8.67° W · Centro, Portugal

PrototypeStudioN☀ S

Builders, architects, installers: let's work together

Kozy works with local partners for every trade. If you are based in the Centro region, we would like to meet you.

  • Foundations
  • Timber assembly
  • Carpentry
  • Electrics & KNX
  • Plumbing & heat pumps
  • Solar
  • Architecture
Become a partner

Questions

What is a passive house?

A building that needs so little energy for heating and cooling, at most 15 kWh per m² per year, that a small heat pump and heat-recovery ventilation are enough. It relies on insulation, airtightness, good glazing and orientation.

Is a wooden house durable and safe in a fire?

CLT is solid engineered timber. In a fire it chars on the surface and the char protects the core, so the panels keep their strength for a predictable time. Well-detailed timber houses last for generations.

Do I need a building permit?

Yes. In Portugal a house needs a licence from the Câmara Municipal. We prepare the project and handle the application with you.

What does the automation control?

Heating and cooling, ventilation, motorised shading, lighting, solar and battery, and security. It keeps working without the internet, and you can use it from an app or ordinary switches.

Is the simulation price final?

No. It is an indicative estimate. The final price depends on your plot, the foundations, the connections and the design study, and it is fixed in the contract.