Designing a guest house using a 40-foot shipping container allows for a more spacious layout. Here are some ideas and considerations for creating a comfortable and welcoming 40ft container guest house:

1. Open Concept Layout: Consider an open floor plan for the main living area to create a sense of spaciousness. This can include a combined living room, kitchenette, and dining space.
2. Bedroom Area: Designate a separate area for the bedroom to provide privacy for guests. This can be achieved by using a loft space, creating a partition, or using furniture to define the sleeping area.
3. Bathroom Design: Include a compact but fully functional bathroom. Consider a shower, toilet, and sink to provide all the necessary amenities. Space-saving fixtures can help maximize the available area.
4. Kitchenette: Create a small kitchenette with essential appliances like a mini-fridge, microwave, and possibly a small cooktop. Consider space-saving cabinets for storage.
5. Multi-Functional Furniture: Use furniture that serves multiple purposes, such as a sofa bed or a dining table that can be folded away when not in use.
6. Large Windows and Doors: Install large windows and doors to bring in natural light and create a connection with the outdoors. Sliding glass doors can open up the space and provide access to a patio or deck.
7. Outdoor Living Space: Extend the living space with an outdoor area. This could be a deck or patio where guests can enjoy the surroundings.
8. Airflow and Ventilation: Ensure proper ventilation to maintain a comfortable interior. Consider installing windows that can be opened to allow for natural airflow.
9. Decor and Color Palette: Choose a decor style and color palette that creates a welcoming and cozy atmosphere. Lighter colors can help the space feel larger.
10. Insulation: Properly insulate the container to regulate the temperature inside. This is crucial for guest comfort in varying weather conditions.
11. Sustainable Features: Consider incorporating sustainable features, such as energy-efficient lighting, insulation materials, and possibly solar panels for power.
12. Storage Solutions: Integrate storage solutions to keep the space organized and clutter-free. This can include built-in cabinets, under-bed storage, and closet space.
13. Landscaping: Enhance the surroundings with landscaping elements. This could include plants, walkways, or outdoor seating areas.
14. Permits and Regulations: Check local building codes and regulations to ensure compliance. Even for a guest house, it’s important to adhere to safety and zoning standards.

Engage with professionals, including architects and builders, during the design and construction phases to ensure that your 40-foot container guest house meets safety standards and local regulations. Customization is key, so tailor the design to fit the needs of your guests and the available space.