Warmer · Quieter · Healthier Homes across Northern Ireland

 

I help homeowners upgrade and transform older houses through independent design and coordination for energy-efficient, comfortable living — using a whole-house approach.

See how I work and whether your project is a fit.

About Me

I’m Marcin Piotrowicz — an architect based in Belfast, specialising in retrofit design for homeowners. My focus is on helping people upgrade older houses into warmer, healthier, and more energy-efficient homes. I’m also a certified Passive House designer, bringing rigorous standards and practical experience to every project. More about me→

How I Help

Whole house approach involves upgrading existing buildings so they perform less like tents with radiators bolted on. The term used by professionals for upgrading old houses is house retrofit. What is retrofit→

My Process

Every project is different, and the process adapts as needed. But here is how it typically unfolds:

  1. Discovery – Free 30 minute Zoom session to assess fit
  2. Home Visit – Proper look on your house and initial feasibility discussion
  3. Strategic Assessment – Your house analysis and comprehensive report
  4. Your Options – Retrofit strategies tailored to your budget and timeline
  5. Design & Delivery – From concept through to completion and monitoring

See full process→

Here’s what homeowners in Northern Ireland say about working with me:

My new accommodation is very comfortable and has lived up to my expectations,
especially the performance of its insulation.

Homeowner in Holywood area, Private text message

Very reliable and punctual… great vision for structure and design… highly recommend him.

Homeowner in East Belfast, Review on Houzz

I’m very grateful to you — because without you, we would not be here.

Homeowners in Malone area, Post-completion walkthrough

See how I work and whether your project is a fit.