You’ll likely need SAP calculations if you're building a new property, converting an existing one (like a barn or flat), or adding a large extension, especially if the build contains significant glazing. It’s a legal requirement under Building Regulations Part L in the UK.

We’ll need your floor plans, elevations, section drawings, and a site plan. Don’t worry if you’re not sure what’s required – we’ll guide you through everything.

The price we charge for your bespoke SAP calculations will depend on the size, complexity and location of your project. Fees start from £140. Please contact us directly for more information on pricing and to get a quote.

We typically complete SAP calculations within 7 days after receiving your drawings and confirming the scope. In some circumstances, faster turnarounds are available. Speak to us to see what’s possible.

Yes! We don’t just assess your property’s energy performance, we can advise on how to optimise it. If your design doesn’t meet the required standards straightaway, we’ll suggest cost-effective improvements to help you achieve compliance. Once the adjustments have been made, we will carry out a reassessment and share the new results – and we’ll repeat this process until compliance is guaranteed.

Yes. We provide SAP assessments for new builds (Part L1A) as well as extensions and conversions (Part L1B). Each has specific criteria, and we tailor our service accordingly.

Absolutely. Our SAP assessors are fully accredited, and all reports are prepared in line with government standards.

Yes, for new builds and conversions, an EPC (Energy Performance Certificate) is required once construction is complete. We can provide this as part of your SAP calculations package.

Yes, we regularly liaise with architects, developers, and contractors to streamline the process. We’re happy to communicate directly with your team.

We’re based in Essex but do work nationwide. Wherever you’re based, we’re confident one of our assessors will be able to carry out SAP calculations near you.