Modern Residential Duplex Construction

I'm seeking a skilled architect and builder to design and construct a modern-style residential duplex. The primary requirement is an open-concept living area.

Key requirements include:
- Modern architectural design
- Open-concept living area

Ideal skills and experience:
- Proven experience in residential duplex projects
- Strong portfolio in modern architecture
- Familiarity with energy-efficient materials and designs is a plus

Please share relevant work samples and a comprehensive bid.