An irrigation specialist designs and installs automated watering systems that deliver water efficiently to gardens, commercial landscapes, sports pitches and horticultural growing areas. Irrigation systems in the UK must comply with Water Regulations (WRAS) - specifically the backflow prevention requirements that stop garden water contaminating the mains drinking water supply. Irrigation specialist is not a regulated title, but IIAUK (Irrigation Association UK) membership and WRAS-approved products are key quality indicators.
What they do
- Design automated irrigation systems for gardens and grounds
- Install underground pipe networks, valves and controllers
- Install drip irrigation for shrub beds and borders
- Install pop-up sprinkler systems for lawns
- Commission and programme smart irrigation controllers
- Install soil moisture sensors and weather station integration
- Ensure WRAS-compliant backflow prevention
- Service and adjust systems seasonally
When you need one
Irrigation is most valuable where watering by hand is impractical, where water efficiency matters, or where a new garden is being planted.
Typical costs (UK, 2025)
| Job type | Typical cost |
|---|---|
| Domestic garden irrigation system (supply and install) | £800 - £3,000 |
| Large garden or grounds system | £3,000 - £12,000+ |
| Sports pitch irrigation (per pitch) | £5,000 - £25,000+ |
| Drip irrigation system (per 100 sq m) | £400 - £900 |
| Smart controller upgrade | £300 - £700 |
| Annual service and seasonal adjustment | £150 - £350 |
Costs increase significantly for larger systems, more zones, or sites with restricted access. Annual servicing is recommended to check emitters, adjust coverage and update watering schedules.
Qualifications to look for
IIAUK membership indicates professional standards in irrigation design and installation. Members commit to a code of conduct and ongoing professional development. Check at iiauk.org.
All irrigation connections to the mains water supply must comply with UK Water Regulations. A competent installer will use WRAS-approved backflow prevention devices (typically a double-check valve or reduced pressure zone valve) to protect the drinking water supply from garden contamination.
Frequently asked questions
Do I need permission for an irrigation system?
No planning permission is needed for underground garden irrigation systems. However, the water supply connection must comply with Water Regulations (WRAS), including appropriate backflow prevention to stop garden water entering the drinking water supply. A reputable irrigation specialist will ensure WRAS compliance as part of the installation.
What is drip irrigation?
A water-efficient method that delivers water directly to the root zone through a network of tubes and drip emitters. Significantly more efficient than sprinklers as water is applied slowly at the base of plants, reducing evaporation and surface runoff. Particularly suitable for shrub beds, vegetable gardens and containers.
What is a smart irrigation controller?
A controller that adjusts watering schedules based on weather data, soil moisture sensors and evapotranspiration rates. Smart controllers can reduce water use by 30-50% compared to timer-only systems by only watering when plants actually need it. Most modern systems can be controlled via a smartphone app.