Ostro

Our own Certified Passivhaus home in the heart of a historical conservation village. 

A box within a box

Our focus isn’t on sustainability alone. 
As designers, we’re passionate about contemporary architecture in unexpected places – like rural Scotland, for one.

Designed based on the concept of a box within a box, the inner cube of Ostro is conceived as an exquisitely crafted, black stained joinery element. This sculptural form, present in every room, houses the wet services and circulation – while framing the flexible, accessible spaces that surround it. Designed to embrace the views and natural light, these areas create an open and connected environment.

Handcrafted over several years, the outer box is finished with a striking, diagonally oriented rainscreen of naturally weathered timber cladding – protecting the high-performance, naturally insulated construction beneath. It’s between these two boxes that the spaces truly come to life.

The approach to both the design and construction of this home are deeply intertwined – demonstrating care towards people and the planet. Ostro proves that it’s entirely possible to reduce carbon emissions and energy use while creating spaces that enhance health, wellbeing, and joy through creative architecture.

Sustainability and Passivhaus

We designed our own home to be an exemplar low-energy build. Not only did it achieve Passivhaus Certification, it also meets the holistic requirements of the Technical Standards Section 7: Sustainability Gold Level. And it has exceptionally low embodied carbon.

The sedum planted roof attenuates the rainwater, which then journeys through a single expressed pipe, before flowing through a raised rill to a pebble garden of found stones – making its journey a visible and integral part of the design.

This minimal environmental impact is reflected in the architectural vocabulary – nothing is unnecessary or superfluous. Every element meaningfully contributes to the story of the building, expressing both its beauty and resilience in the face of the climate crisis.

Testimonial

“It sends all the right messages about energy. The architect is driving an idea forward. It’s full of light, and beautiful spaces and energy kicks it into the clear blue water. A clear winner, there are lots of strong points we should be pushing as a profession. The brief addresses how we live. There’s a narrative inside with the dark stair core. I like the plan. Passivhaus has been a mock vernacular. This is innovative in the modern tradition.”

 

—Allan Murray, Chair of the Scottish Design Awards 2022

Passivhaus Certifier
Co-Create

Engineer
Clyde Design Partnership

Embodied Carbon (A-C)
411 KgCO2eq/m2

Awards

Passivhaus Trust Awards 2023

Winner in Residential New Build Category

RIAS Awards 2022
Award Winner

RIAS Awards 2022
Circular Economy Design Award
(sponsored by Zero Waste Scotland)

Scottish Design Awards 2022
Chairman’s Award for Architecture

Scottish Design Awards 2022
Winner in Residential Category

RIBA House of the Year 2022 

Longlisted

ASBP Awards 2022
Honourable Mention

Saltire Society Housing Design Awards 2021
Commendation

Daily Telegraph Homebuilding & 
Renovation Awards 2021
Best Green Home

Daily Telegraph Homebuilding & 
Renovation Awards 2021
Home of the Future