JL Studio

Architect + Certified Passivhaus Designer

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JL Studio puts you central to the design process, offering creative, low-energy + super-healthy solutions to bring your dream build into reality



JL Studio is the architecture practice with a creative, collaborative and sustainable approach to design


Designs are developed to respond to the local context, respect historic structures and celebrate innovation. The resultant architecture is sensitive to its surroundings without creating a pastiche of the past.


A collaborative working culture is developed with the client, consultants, builders and authorities, combining the collective experience and expertise of the wider team to achieve a more robust end product.


The practice specialises in sustainable architecture and Joanna is a Certified Passivhaus Designer. This is an internationally recognised certification which demonstrates that she has the knowledge and experience necessary to design extraordinarily sustainable and comfortable buildings.


Passivhaus offers clearly defined energy and comfort standards that produce excellent results. The technical criteria result in buildings that are healthy for both the people and the planet. The principles of Passivhaus are: build robustly, wrap it up warm, use the sun for heating and maintain good air quality. These simple criteria make the standard a sustainable solution for everyone – which is why Passivhaus is core to the practice ethos and research.



Joanna Lindley

BSc(hons) | BArch | PGDip Arch

Architect & Certified Passivhaus Designer

Joanna has a diverse architectural background, having worked at practices in London and Zurich and studied at Cardiff and Westminster. She has experience in a wide range of sectors, including sustainable projects, extensions to urban & suburban homes and new-build private & affordable housing.


  • ARB. Registered as an architect under the Architects Act 1997
  • iPHA. Registered as Certified Passivhaus Designer, Passivhaus Institut


Qualifications & Fellowship

  • 2016. Churchill Fellow, The Winston Churchill Memorial Trust
  • 2015. Certified Passivhaus Designer Passivhaus Institut, Darmstadt.
  • 2009. RIBA Part 3 PGDip Professional Practice. Westminster University.
  • 2006. RIBA Part 2 BArch Architectural Studies. Welsh School of Architecture.
  • 2004. RIBA Part 1 BSc Architectural Studies. Welsh School of Architecture.


Based in Cardiff, JL Studio offers architectural and Passivhaus services to clients in Wales and South West England. If you’d like to get in touch regarding your project please email to arrange an initial consultation.