An environmental engineer manages the environmental impacts of construction - assessing and mitigating risks to soil, water and air quality, managing waste streams, and ensuring compliance with planning conditions and environmental legislation. They differ from an ecologist (who focuses on biodiversity and habitats) in that their focus is on physical environmental systems. On larger developments they often contribute to Environmental Impact Assessments alongside specialists in traffic, noise, ecology and heritage.
What they do
- Environmental impact assessment (EIA) chapter input
- Contaminated land investigation and remediation management
- Waste management planning and materials management plans
- Air quality monitoring and mitigation specification
- Water quality protection during construction
- CEMP (Construction Environmental Management Plan) preparation
- Biodiversity net gain calculation input
- Sustainable drainage and water management coordination
When you need one
Environmental engineers are typically needed on brownfield developments, sites near watercourses, projects requiring EIA, and any scheme where planning conditions require environmental management plans or monitoring.
Typical costs (UK, 2025)
| Job type | Typical cost |
|---|---|
| Phase 1 desk study | £600 - £1,500 |
| Phase 2 ground investigation | £2,000 - £7,000+ |
| CEMP preparation | £800 - £2,500 |
| Air quality assessment | £700 - £2,000 |
| Waste management plan | £400 - £900 |
| Hourly rate | £80 - £140 / hr |
Environmental engineering fees on EIA projects are often agreed as part of a multi-discipline team package. On smaller brownfield schemes the contamination assessment is usually the largest cost item - budget for both Phase 1 and contingency for Phase 2.
Qualifications to look for
The leading professional body for environmental practitioners in the UK. MIEMA (Member) confirms competence across environmental management disciplines including EIA, contaminated land and sustainability. FIEMA denotes Fellow status. Check at iema.net.
Particularly relevant where the work involves water quality, flood risk and drainage. MCIWEM confirms competence in the water environment aspects of development. Check at ciwem.org.
The academic foundation for IEMA and CIWEM membership routes. Some practitioners hold geography or earth science degrees and have specialised into environmental engineering through professional development.
How to find a reputable environmental engineer
Frequently asked questions
What is a CEMP?
A CEMP is a Construction Environmental Management Plan - a document required by planning conditions that sets out how a contractor will manage environmental impacts during construction. It covers noise and vibration monitoring, dust suppression, management of surface water runoff, waste management, ecological protection and working hour restrictions. The CEMP is typically reviewed and approved by the local planning authority before construction starts.
Do I need an environmental engineer for a small development?
Small developments in environmentally sensitive locations - near watercourses, in areas with known contamination, in air quality management areas, or near protected habitats - may need an environmental engineer even if a full EIA is not required. Planning authorities often request environmental supporting information as a validation requirement for sites in sensitive locations.
What is the difference between an ecologist and an environmental engineer?
Ecologists focus on wildlife, habitats and biodiversity - carrying out protected species surveys, habitat assessments and biodiversity net gain calculations. Environmental engineers focus on physical environmental systems - soil contamination, water quality, air quality and waste management. Their work overlaps on complex sites and they often work together as part of an environmental team on larger development projects.