Sustainable Homes, Built with Integrity.
Good building shouldn’t be complicated. Whether it’s your first home or a full development, the right guidance makes all the difference.
After decades in construction across the UK and Europe, we founded Myzsa to offer something better — sustainable, precision-built homes that put comfort, efficiency and craftsmanship first.
Our role is simple: to listen, understand how you live, and create spaces that feel good every day while performing brilliantly for generations to come.
“Better buildings don’t just save energy. They change how people live, feel and experience their homes.”
Everything we do is focused on comfort, clarity and long-term performance.
60+
Years Experience
0.17ACH
Airtightness
100%
Low-Energy Focus
UK-EU
Project Delivery
Building Solutions for a Better Future
From new homes to complex retrofits, our services are shaped around comfort, performance and long-term sustainability.
Every project is guided by Passivhaus principles, expert craftsmanship and a commitment to creating spaces that feel exceptional to live in.
New Build Construction
We design and deliver high-performance homes built from the ground up, combining Passivhaus-led thinking, modern construction methods and exceptional attention to detail.
Conversions & Extensions
We transform existing homes with thoughtful design and careful construction, improving space, comfort and energy performance while respecting the character of the building.
Retrofit (EnerPHit)
Using the EnerPHit standard, we upgrade existing buildings to near-Passivhaus performance, dramatically reducing energy use and enhancing everyday comfort.
Building Fabric & Renewables Upgrades
We strengthen the core performance of your home through insulation, airtightness and renewable technologies, improving efficiency and long-term resilience.
Passivhaus Certification & Quality Control
We provide expert oversight, testing and documentation to ensure projects meet the rigorous requirements of Passivhaus certification and quality standards.
Passivhaus Specialists
Every project is informed by internationally recognised Passivhaus principles, ensuring exceptional comfort and energy efficiency.
Proven Quality Control
We apply strict testing and on-site verification to make sure performance targets are met, not just promised.
Trusted Experience
With decades of combined experience, we deliver dependable outcomes built on clarity, integrity and attention to detail.
Built on Trust
Every project begins with honesty, collaboration and a shared commitment to quality, because trust is the foundation of everything we build.
Smarter Ways to Build
By combining advanced Passivhaus design with modern methods, we create homes that are efficient, comfortable and future-ready.
Excellence in Every Detail
From airtight construction to flawless finishes, our craftsmanship ensures your home performs beautifully and endures for generations.
Homes That Care
We minimise environmental impact through low-energy design, renewable technologies and ethical construction practices.
“From our first conversation to the final handover, the whole experience felt calm and well managed. Everything was clearly explained and we always felt informed. The house is incredibly comfortable and performs better than we imagined. We wouldn’t hesitate to recommend Myzsa.”
Sarah Collins
New Build Construction
“We were nervous about extending our home, but Myzsa guided us through every step with clarity and care. The workmanship is exceptional and the finished space feels seamless, warm and thoughtfully designed. It’s completely transformed how we live in our home.”
James Thornton
Conversion & Extension
“The retrofit has made a huge difference to our day-to-day comfort. The house is warmer, quieter and far more efficient. The team explained the process clearly and delivered exactly what they promised. It’s one of the best decisions we’ve made.”
Emma Richardson
Retrofit (EnerPHit)
“From start to finish, the process was professional and transparent. The attention to detail and focus on performance really stood out. Our home now feels solid, comfortable and future-proofed. We felt confident in their expertise throughout.”
Mark Evans
Building Fabric & Renewables Upgrades
“Achieving Passivhaus certification felt daunting at first, but Myzsa made the process clear and manageable. Their quality control and testing gave us total confidence, and the final result speaks for itself. The performance of the building is outstanding.”
Laura Bennett
Passivhaus Certification & Quality Control
“What impressed us most was how listened to we felt. Every decision was explained, and the result is a home that feels calm, efficient and beautifully built. The experience was smooth from beginning to end, and the quality is evident in every detail.”
David Walker
New Build Construction
Frequently asked questions
Clear answers to common questions, so you can move forward with confidence.
How early should I involve Myzsa in my project?
The earlier we’re involved, the more value we can add. Early input helps shape design decisions, improve performance and avoid costly changes later on.
Do all projects need to meet Passivhaus standards?
No. While Passivhaus principles guide our work, we tailor the level of performance to suit your goals, budget and project scope.
Can you work with my architect or designer?
Yes. We regularly collaborate with architects and consultants, working as part of a wider team to deliver the best outcome.
Do you work on existing homes as well as new builds?
Absolutely. We specialise in extensions, retrofits and upgrades, improving comfort and energy efficiency in existing properties.
How long does a typical project take?
Timelines vary depending on the type and complexity of the project. We’ll provide a clear programme once scope and design are agreed.
What areas do you work in?
We’re based in North Wales and work across the UK, supporting residential and selected commercial projects.
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