Limited lot size doesn’t mean limited living space. A 2Nd Floor 2 Storey House Design With Roof Deck lets you expand upward, creating a private outdoor area for relaxing, entertaining, or enjoying city views. This guide shows you how to design it safely, beautifully, and cost-effectively for a modern US home.
## What Is a 2Nd Floor 2 Storey House Design With Roof Deck?
A 2Nd Floor 2 Storey House Design With Roof Deck places a usable terrace above the second level, accessed by an internal stair. Instead of a traditional sloped roof, part (or all) of the roof becomes a flat, reinforced deck with railings, drainage, and weatherproofing.
Read too: Is It Reasonable to Ask the Seller to Replace the Roof?
Why homeowners love it:
- Extra outdoor space without increasing footprint
- Better views and airflow
- Ideal for small urban lots
- Adds property appeal and lifestyle value
Why Add a Roof Deck to a Two-Storey Home?
Practical Benefits
- Converts unused roof area into functional space
- Great for gatherings, BBQs, or quiet evenings
- Improves cross-ventilation and natural cooling
Lifestyle Benefits
- Private retreat above street level
- Sunset views and skyline scenery
- Gardening in containers or planters
According to housing trend reports, outdoor living spaces rank among the top features buyers want in modern homes.
Key Structural Requirements You Must Plan First
Before aesthetics, focus on structure:
- Load-bearing capacity (deck must handle people, furniture, planters)
- Waterproofing membrane to prevent leaks
- Proper drainage slope (1–2% gradient)
- Safety railings at least 42 inches high (typical US code)
- Stair access with weather protection
Consult a structural engineer to calculate live loads (often 40–60 lbs/sq ft minimum).
Popular Layout Options for Roof Deck Designs
| Layout Type | Best For | Key Feature |
|---|---|---|
| Full Roof Deck | Narrow lots | Maximum usable space |
| Partial Deck | Budget builds | Lower construction cost |
| Pergola Covered | Sunny climates | Shade and comfort |
| Garden Deck | Green lovers | Planters and seating |
Design Ideas That Elevate the Space
1. Pergola + Lounge Seating
Creates shade and a resort-like vibe.
2. Built-in Benches with Storage
Saves space and hides clutter.
3. Outdoor Kitchenette or BBQ Corner
Perfect for entertaining guests.
4. Glass or Metal Railings
Maintains views while ensuring safety.
5. Ambient Lighting
LED strip lights along rails and stairs for evening use.
Step-by-Step Planning Guide
- Check local building codes and HOA rules.
- Hire an architect/engineer for structural assessment.
- Decide deck size (common: 200–400 sq ft).
- Choose waterproofing system (PVC membrane or liquid seal).
- Plan drainage outlets and slope.
- Install non-slip deck flooring (composite wood or tiles).
- Add railing, lighting, and furniture last.
Estimated timeline: 3–6 weeks.
Material Choices for Long-Lasting Roof Decks
| Material | Pros | Cons |
|---|---|---|
| Composite decking | Weather resistant | Higher cost |
| Concrete tiles | Durable | Heavier load |
| Treated wood | Natural look | Needs maintenance |
| PVC membrane | Excellent waterproofing | Professional install |
Pros and Cons
Advantages
- Adds usable square footage
- Increases home value
- Ideal for small properties
- Great entertainment area
Challenges
- Higher construction cost
- Requires excellent waterproofing
- Needs structural planning
Estimated Cost in the US
| Component | Average Cost |
|---|---|
| Structural reinforcement | $3,000–$8,000 |
| Waterproofing | $2,000–$5,000 |
| Deck flooring | $3,000–$7,000 |
| Railings & stairs | $2,000–$6,000 |
Typical total: $12,000–$30,000 depending on size and finish.
Safety and Building Code Considerations
- Minimum railing height: ~42 inches
- Non-slip flooring required
- Proper drainage mandatory
- Stair width and handrails per code
For general background on residential structures and safety, see:
https://www.wikipedia.org/wiki/House
Real-World Use Cases
Homeowners commonly use roof decks for:
- Morning coffee space
- Evening relaxation zone
- Small gatherings
- Container gardening
- Yoga or workout space
## FAQ — 2Nd Floor 2 Storey House Design With Roof Deck
Q1: Is a roof deck safe for all houses?
Only if the structure is reinforced to carry additional load.
Q2: Does a roof deck increase home value?
Yes. Outdoor living space is highly desirable in urban markets.
Q3: What flooring is best?
Composite decking and tiles are popular for durability and grip.
Q4: How do you prevent leaks?
Professional waterproof membranes and proper drainage slope.
Q5: Do I need permits?
Yes. Most cities require permits for structural modifications.
Q6: Can I add plants and furniture?
Yes, but factor their weight into structural planning.
Conclusion
A well-planned 2Nd Floor 2 Storey House Design With Roof Deck transforms unused roof space into a private outdoor retreat. With proper structure, waterproofing, and thoughtful design, it becomes one of the most loved areas of your home.
If this guide inspired your project, share it on social media to help others design smarter, more enjoyable living spaces.
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