What Happens During an EPC Assessment? A Complete Guide for Homeowners, Landlords & Businesses

If you’re selling, renting, or leasing a property, one of the first things you may need is an Energy Performance Certificate (EPC).

A common question we hear at EcoRate Anglia is:

What happens during an EPC assessment?

Whether you’re a homeowner preparing to sell, a landlord renting to new tenants, or a business owner managing commercial premises, understanding the EPC process helps avoid delays, compliance issues, and unnecessary stress.

The good news? It’s quick, straightforward, and essential for keeping your property legally compliant.

In this guide, we explain exactly what happens during an EPC assessment and why arranging one early matters.

What Is an EPC?

An Energy Performance Certificate (EPC) measures how energy efficient a property is and provides a rating from:

A (Most Efficient) to G (Least Efficient)

It also includes recommendations to improve efficiency, reduce energy bills, and increase property value.

An EPC is usually required when:

• Selling a property

• Renting out a property

• Leasing commercial premises

• Building a new property

• Renewing tenancy agreements in some situations

For landlords and business owners, having a valid EPC is often a legal requirement.

When Do You Need an EPC?

You’ll usually need an EPC if you are:

Homeowners

Selling your house or flat

Landlords

Letting a residential property to tenants

Business Owners

Selling, leasing, or renting commercial property such as offices, shops, warehouses, and industrial units

Estate Agents

Preparing a property for marketing

Leaving your EPC too late can delay sales, lettings, and commercial transactions. This is why estate agents often recommend arranging your EPC early.

Step 1: Booking Your EPC Assessment

The process starts with a simple booking.

We’ll usually ask for:

• Property address.

• Property type.

• Number of bedrooms (for domestic EPCs).

• Commercial building details (for commercial EPCs).

• Preferred appointment date and time.

  
  

At EcoRate Anglia, most EPC appointments can be arranged quickly across East Anglia. Fast booking helps avoid last-minute property delays.

Step 2: The Property Inspection

A qualified Domestic Energy Assessor or Commercial Energy Assessor visits your property to inspect the features that affect energy performance.

This usually takes:

30–60 minutes for domestic properties

and longer for larger commercial buildings depending on size and complexity. The visit is non-invasive and straightforward, there’s no drilling, lifting floors, or disruption. It’s simply a professional visual inspection with visual evidence recorded.

Step 3: What Is Checked During an EPC Assessment?

During the inspection, your assessor looks at several key factors.

Heating System

• Boiler type

• Boiler age

• Heating controls

• Thermostats

• Radiators

• Hot water systems

Older, inefficient systems often lower EPC ratings.

Insulation

• Loft insulation

• Cavity wall insulation

• Solid wall insulation

• Floor insulation where relevant

  
  

Better insulation improves energy efficiency and helps reduce bills.

Windows & Glazing

• Double glazing

• Window condition

• Heat retention performance

Poor glazing can negatively affect your EPC score.

Lighting

• Energy-efficient bulbs

• LED lighting installations

  
  

Simple lighting upgrades can improve your rating.

Construction Type

• Age of building

• Roof structure

• Wall construction

• Floor construction

Older properties often require more detailed assessment.

Renewable Energy Features

• Solar panels

• Heat pumps

• Renewable heating systems

• Other energy-saving improvements

These can significantly improve EPC ratings.

What Is Checked During a Commercial EPC?

For commercial EPCs, additional systems are assessed, including:

• Air conditioning systems

• Ventilation systems

• Lighting efficiency

• Building layout and usage

• Heating and cooling performance

• Overall building energy demand

This applies to offices, retail units, warehouses, restaurants, and industrial buildings. Commercial EPCs are especially important before selling or leasing business premises.

Step 4: EPC Calculation and Energy Rating

After the visit, government-approved software is used to calculate your official EPC score.

This produces:

Your Energy Rating

A–G efficiency rating plus

Recommendations Report

Suggestions for improving your score These recommendations may include:

• Upgrading insulation

• Replacing old boilers

• Installing LED lighting

• Improving glazing

• Renewable energy improvements

  
  

Higher EPC ratings often improve property value and appeal to buyers and tenants.

Step 5: Your EPC Certificate Is Issued

Once completed, your EPC is lodged on the national EPC register.

You receive:

Your Official EPC Certificate and A Full Recommendations Report.

Most certificates are delivered quickly after the assessment. This allows estate agents, landlords, and business owners to move forward without delays.

How Long Does an EPC Last?

An EPC is valid for 10 Years, unless major property improvements or changes mean a new EPC is recommended sooner. Many landlords choose to renew earlier to improve ratings and remain compliant with changing regulations.

Why You Should Arrange Your EPC Early

One of the biggest mistakes property owners make is leaving EPCs until the last minute.

This can cause:

• Delayed property listings

• Delayed sales

• Delayed tenant move-ins

• Legal compliance problems

• Lost buyers or tenants

• Unnecessary stress

Early EPCs help property transactions run faster and smoother. This is why estate agents strongly recommend getting it sorted first.

How EcoRate Anglia Can Help

At EcoRate Anglia, we make the EPC process simple, fast, and hassle-free.

We provide:

✔ Domestic EPCs

✔ Commercial EPCs

✔ Landlord Compliance Support

✔ Damp & Mould Assessments

✔ Fast Turnaround Times

✔ Qualified Local Assessors

✔ Competitive Pricing

✔ Coverage Across Norfolk, Suffolk, Essex and Cambridgeshire

Whether you’re selling a home, managing rental properties, or preparing commercial premises for lease, we help keep everything compliant and moving smoothly.

Need a Domestic or Commercial EPC?

If you need a Domestic EPC, Commercial EPC, or a Damp & Mould Assessment anywhere across East Anglia, EcoRate Anglia is here to help.

Our experienced team provides fast appointments, professional advice, and reliable service for homeowners, landlords, estate agents, and businesses.

Contact EcoRate Anglia today for a fast EPC quote.