Treatment Comparison
Excavation vs Herbicide Treatment for Japanese Knotweed
Choosing the right knotweed treatment can save you thousands and shave years off your project timeline. Here's how the two main methods compare for UK property owners, developers and landlords.
Herbicide Treatment
From £1,500 · 3–5 years
Pros
- Lowest cost option
- Minimal site disruption
- No spoil to remove
- Includes 10-year guarantee
Cons
- Multi-year programme
- Not suitable for immediate development
- Seasonal application window
Excavation
From £5,000 · Days to weeks
Pros
- Immediate clearance
- Ideal for development sites
- On-site burial / cell options
- Mortgage-ready sign-off
Cons
- Significantly higher cost
- Landfill disposal expensive
- Heavy plant access required
Not sure which method is right?
Book a free PCA-qualified survey and we'll recommend the most cost-effective option.