Three decades of experience. One straightforward service.
We're an independent energy assessor based in Devon — fully accredited, locally rooted, and built on a career spent understanding how buildings really work.
Independent expertise, built over a lifetime in property.
Norley Energy Services is an independent Energy Assessor based in Devon, run by Alex Slattery. With more than 30 years of hands-on experience in domestic property — and accreditations from ECMK, Elmhurst, and TrustMark — you can be confident that every assessment is carried out to the highest professional standards.
Qualified to the highest level in retrofit and energy assessment.
Alex holds an MSc in Building Surveying and a BEng (Hons) in Building Services Engineering — providing a technical foundation that goes well beyond the minimum requirements for energy assessment work.
For retrofit specifically, Alex holds the Level 5 Diploma in Retrofit Coordination and Risk Management — the highest qualification available in this field, and the benchmark for Retrofit Coordinators working on government-funded schemes.
Accredited, registered, and independently verified.
Every assessment we carry out is backed by recognised national accreditations. These aren’t just logos — they represent ongoing compliance with professional standards, independent auditing, and consumer protection.
- ECMK — one of the UK's leading energy assessment accreditation schemes, authorised by the government to quality-assure energy assessors and the EPCs they produce.
- Elmhurst Energy — the UK's largest energy assessment membership scheme, providing accreditation to the highest industry standards.
- TrustMark — the government-endorsed quality scheme for retrofit work, mandatory for all work carried out under government-funded energy improvement schemes.
Ready to book an assessment?
Get in touch today and we’ll talk through what you need.