LM Building Design is an avant-garde architectural design firm based in Barrie offering full architectural and interior design services for custom homes, rebuilds & additions. We design high-quality contemporary & modern houses for those looking for something different and sophisticated.



From simple, minimal house designs to complex custom modern homes, we design functional and unique homes adapted to your needs and lifestyle.

Whether you need more space, change the interior floor plans or re-design the exterior of your house, our architectural design services will give your house a new life.

We design thoughtful, functional and livable spaces. Whether you need a kitchen design, a bathroom, a living room, a fireplace  or a bedroom design in Barrie, we’ll create something unique.


  • Full architectural design
  • Conceptual house design
  • Space planning
  • House plans
  • Interior Design
  • Kitchen & bathrooms design


  • Stairs design
  • Exterior house re-design
  • Additions & Renovations



We're transparent

Our flat rate system based on footprint, design complexity and construction method is simple and transparent. Most Barrie’s interior designer and architects charge by the hour. We don’t charge for meetings, travelling nor site visits so we can seat, relax and talk. Luis will also communicate with you directly; no answering machines, long delays nor miscommunication.


we're ingenious

Luis is a right & left brained, so the architectural designer is also the guy doing the maths and placing the puzzle together. Our architectural and interiors designs are unique to your project, we don’t recycle ideas.

Our blueprints are made with detailed precision, easing the construction of your project with a swift permit approval. With our construction and engineering experience we can manage any challenge; no matter how complex your project is, we'll get it done.


we're geeks

Using the most advanced architectural software, you will have the opportunity to see your project and house plans in 3D from your iPad or PC. We’re  the only architectural designers in Barrie including renderings and a 3D model, which allows you to see your house as if it was built. You will be able to visualize the whole project and its different materials combinations and options.


"Luis was an absolute pleasure to deal with. Professional, attentive and meticulous, Luis provided a complete set of working drawings for our custom modern build project in Barrie in a timely fashion. We have not experienced a more seamless approval with securing a building permit as we have with L+M Building Design. Luis’ approach and vision towards modern design aligned incredibly with our vision and needs for our project. We highly recommend LM Building Design and look forward to collaborating on future projects."       -M. Carty, Builder
"I have engaged LM Building Design for 2 projects & creation of 2 more complicated preliminary Zen designs
He has accompanied me to client residences-very obliging . After 24 years & 125 homes under my belt---Luis is is the best I have worked with-very efficient,very creative & above all totally understanding of client's desires & my role as project consultant."      - J. Axmith, Collegue
"My experience with Luis was fantastic. It was a pleasure to work with him. He is very professional and always smiling. My kitchen was a nightmare to design and he designed until the right one fit perfectly! Throughout the process he kept in contact continually and kept me abreast of things. He even took the time to explain different flooring and other products that I wasn't aware of. The results were beautifully created in a less than desireable layout. Much thanks and appreciation for all the extra work and touches. I would recommend L M Building Design to everyone."      - C. Zivny,. Client

Big ideas in mind?