SAP Ratings & EPCs for New Builds

Essential for Compliance, Certification & Net Zero

If you're building, selling, or renting a new domestic property in the UK, you’ll need a SAP assessment to generate a valid Energy Performance Certificate (EPC). We make this process straightforward, so your project stays compliant—and energy-efficient.

What you need to know.

1) What Is a SAP Rating?

SAP stands for Standard Assessment Procedure — the government-approved method for assessing the energy performance of new homes. It’s used to:

  • Calculate energy-related running costs

  • Demonstrate compliance with Building Regs (Part L)

  • Produce an official EPC for the property

SAP is required for all new builds and many conversions or change-of-use projects.

A SAP Rating is essential for securing building sign-off and legally marketing a property for sale or rent.

2) Who Needs a SAP Assessment?

You’ll need a SAP assessment if you are:

  • Building a new residential dwelling

  • Converting a property into multiple flats or dwellings

  • Creating a self-contained unit via change of use

  • Constructing an extension that impacts energy usage

  • Completing as-built sign-off for building control

Different rules may apply in Scotland or for complex refurbishments — we’ll guide you through.

3) What’s Included in the SAP Process?

  1. Design-stage SAP – Checks that your plans meet Part L before work begins

  2. As-built SAP – Verifies what’s been built matches specs and regulations

  3. EPC for new build – Once the SAP passes, we issue your EPC for marketing/sale

We liaise directly with architects, builders, and building control to keep the process seamless.

4) What Affects Your SAP Score?

  • Wall, floor & roof insulation

  • Heating system type & efficiency

  • Hot water system

  • Window & door U-values

  • Lighting (low-energy bulbs, sensors)

  • Air-tightness

  • Renewable energy (solar PV, ASHPs, etc.)

We can advise on improvements during design to help you reach your target rating.

5) Why Choose Us?

  • Fully accredited On Construction Domestic Energy Assessors (OCDEA)

  • Fast turnaround for developers and private clients

  • Competitive pricing

  • Advice on Part L compliance and upgrade paths

  • Bundle services available: SAP + EPC + Floor Plan + Retrofit Assessment

What our clients say

  • Our property management company uses ARC Energy on a regular basis. All our EPC's and Inventories are carried out by ARC. We find their service both competitive and professional. All instructions are emailed over and we receive a timely response and turnaround time. The staff are friendly and polite in all their dealings. We have used ARC Energy for 8 years plus with no complaints. Recommended.

    3rL

  • As a private landlord, I have used ARC Energy for a number of years. Steve and his firm are ready to do our inventories and EPC's, usually at short notice for me. I have recommended ARC to friends and family too. Pricing good. Professional work. Can't go wrong!

    Ranjit U

  • I find dealing with the company very easy and they are very efficient, they have provide me a fantastic service and are always able to accommodate my needs even if they are last minute. Friendly and reliable service staff and will recommend their service to anyone.

    Jamie S

  • Steve can be relied upon to provide smooth efficient service and he will always try to go that extra mile if he can for his customers

    Richard P

  • Friendly, efficient and professional service - very reasonably priced.

    Helena M

Contact Us

Have questions or need a quote? We’re here to help. Contact us today for friendly advice and professional service.