What do energy consultants do?

Energy consultants help organisations reduce energy costs, improve building performance, meet compliance requirements such as ESOS and SECR, and deliver practical net zero strategies.

How much does energy consultancy cost?

Costs vary depending on scope, but Zerith offers flexible delivery models including traditional consultancy and ZECO AI-enabled in-house delivery, which can reduce consultancy costs by up to 70%.

What is ESOS compliance?

The Energy Savings Opportunity Scheme (ESOS) is a UK regulatory requirement for large organisations to assess energy use and identify cost-effective energy savings opportunities.

Can energy consultancy be delivered in-house?

Yes. Zerith offers ZECO AI, enabling organisations to manage energy and compliance internally, supported by expert consultancy and lead assessor sign-off where required.

What does a commercial energy audit include?

A commercial energy audit assesses building systems, energy consumption, and operational performance to identify cost-saving and optimisation opportunities across HVAC, lighting, BeMS, and wider building infrastructure.

How much can an energy audit save?

Most organisations achieve 5–10% reductions in energy costs through targeted optimisation measures, with additional savings available through behavioural and system improvements.

What is the typical payback period for energy improvements?

Typical payback periods range from 12 to 24 months depending on the complexity of the site and the measures implemented.

Can energy audits be delivered in-house?

Yes. Zerith offers a ZECO AI-enabled delivery model that allows organisations to deliver energy audits and optimisation programmes in-house, supported by Zerith expertise and compliance sign-off where required.

Do you support ESOS compliance?

Yes. Zerith provides full ESOS compliance support, including audits, reporting, and Lead Assessor sign-off.

Expert Energy Efficiency Insights, Case Studies & Guidance

Practical guidance, real-world case studies, and technical insights to help you reduce energy costs, achieve compliance, and accelerate your Net Zero journey

Simon Turner 19/02/2026 Simon Turner 19/02/2026

Heat Network Regulations Are Changing. Is Your Building Ready for HNTAS?

The Heat Network Technical Assurance Scheme (HNTAS) is coming — and for commercial real estate operators, portfolio managers, and district energy network operators, the time to prepare is now. Zerith's CIBSE-accredited Heat Network Consultants deliver the most cost-effective HNTAS compliance solutions available, from rapid portfolio reviews to full technical appraisals. Not sure if it applies to you? Use our free compliance checker to find out in minutes.

ESOS Phase 4 Is Coming. Is Your Organisation Ready?

ESOS Phase 4 Is Coming. Is Your Organisation Ready?

For many UK organisations, each ESOS compliance cycle brings the same challenges: rising consultancy costs, internal resource pressure, and audits that feel like a box-ticking exercise rather than a genuine driver of energy efficiency. At Zerith, we believe it should be different.

We've developed two distinct ESOS pathways — a fully managed service powered by the ZECO AI Platform delivering typical savings of 10–15% over traditional consultancy fees, and a supported self-delivery model where your own Building, Energy, ESG or Engineering teams lead the process, unlocking savings of up to 60% for multi-site clients.

Not sure if ESOS even applies to your organisation? Use our free Eligibility Checker to find out in minutes.

Discover which pathway is right for you →

Expert Energy Efficiency Insights, Case Studies & Guidance

Practical guidance, real-world case studies, and technical insights to help you reduce energy costs, achieve compliance, and accelerate your Net Zero journey

Heat Network Regulations Are Changing. Is Your Building Ready for HNTAS?

ESOS Phase 4 Is Coming. Is Your Organisation Ready?

Your Net Zero Journey Starts Here