Extensive Green Roof (Lightweight, Low-Maintenance)
These are the most affordable systems.
Good for homes, garages, small buildings, and roofs with low load capacity.
Price Range:
$10 – $30 per sq ft
$100 – $300 per sq meter
Includes:
- Waterproofing
- Root barrier
- Drainage layer
- 5–15 cm soil
- Sedum or low plants
Ideal For:
- Simple green roofs
- Minimal maintenance
- Budget-friendly projects
2. Semi-Intensive Green Roof
Moderate depth, more plant options, and a balance between cost and aesthetics.
Price Range:
$30 – $60 per sq ft
$300 – $600 per sq meter
Includes:
- 12–20 cm soil
- Grasses + herbs
- Medium drainage system
Ideal For:
- Buildings wanting more greenery
- Medium maintenance
- Decorative rooftops
3. Intensive Green Roof (Full Garden Rooftop)
These are premium, garden-like rooftops that can include paths, shrubs, and even small trees.
Price Range:
$60 – $150+ per sq ft
$600 – $1,500+ per sq meter
Includes:
- Deep soil (20 cm – 1 meter)
- Trees, bushes, flowers
- Irrigation systems
- High-load roof structure
Ideal For:
- Luxury buildings
- Hotels, malls, high-end homes
- Recreational spaces
Additional Costs to Consider
1. Roof Reinforcement
If your roof cannot handle heavy loads:
$5 – $40 per sq ft
$50 – $400 per sq meter
2. Access Difficulty
More cost if:
- Roof is high
- Limited crane access
- Complex building layout
Adds 10% – 25% to cost.
3. Irrigation System
Optional but often used in semi-intensive + intensive:
$2 – $10 per sq ft
$20 – $100 per sq meter
4. Maintenance Costs
- Extensive: $0.50 – $2 per sq ft per year
- Intensive: $1 – $5 per sq ft per year
Quick Summary Table
Green Roof Type Price per sq ft Price per sq meter Maintenance Extensive $10–$30 $100–$300 Low Semi-Intensive $30–$60 $300–$600 Medium Intensive $60–$150+ $600–$1500+ High
References :
Green Roof
Testing Waterproofing for a Green Roof
Understanding Green Roof System Layers
Choosing the Right Waterproofing for a Green Roof
