SAP Calculations for Residential Projects
SAP Calculations for New Builds, Conversions & Extensions
Do you need a professional and compliant SAP Report for your residential project?
Starki Building Performance provides fast, fully compliant SAP calculations for new builds, conversions, and extensions across Wales and the UK. Our SAP reports are Part L compliant, suitable for Building Control submission, and include all required documents for EPC generation.
Whether you’re a developer, architect, or homeowner, we make it simple to achieve energy compliance and avoid delays at completion stage.
Trusted by developers and private clients across the UK.
What Are SAP Calculations?
SAP (Standard Assessment Procedure) is the UK Government’s approved method for calculating the energy performance of new homes and major renovations. A SAP calculation is required to:
✅ Demonstrate compliance with Approved Document Part L (Conservation of Fuel and Power)
✅ Obtain an Energy Performance Certificate (EPC)
✅ Satisfy Building Control requirements
✅ Support funding applications or warranties
SAP scores are expressed in a format similar to EPCs, from A (most efficient) to G (least efficient).
When Do You Need SAP Calculations?
You’ll need SAP calculations for:
🏠 New build dwellings (detached, semi-detached, flats)
🧱 Conversions or material change of use (e.g. barns, office-to-resi)
➕ Extensions with large glazing proportions
🏢 Projects requiring a new domestic EPC
♻️ Applications involving renewables or low-energy targets
Starki coordinates the process from instruction through to report delivery, ensuring minimal disruption to your schedule.
What’s Included in Our SAP Service?
Starki will coordinate the full process, delivered through our white-label testing partner. Our SAP package includes:
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Design-stage SAP report (for Building Control approval)
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Predicted Energy Assessment (PEA) for marketing
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As-built SAP calculation post-construction
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Final EPC issue via accredited assessor
Our team can also advise on cost-effective upgrades if your project falls short of minimum targets.
Areas We Cover
We support SAP calculation projects across:
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Cardiff, Swansea, Newport, Bridgend, and the Vale of Glamorgan
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Llanelli, Neath Port Talbot, and surrounding South Wales regions
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Bristol and the wider Western Gateway
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Remote projects across the UK by arrangement
Why Choose Starki?
✅ Fast turnaround — initial SAP assessments typically within 48 hours
✅ All reports suitable for submission to Building Control
✅ Delivered under the Starki Building Performance brand
✅ Managed by professionals with extensive experience
✅ Coordinated seamlessly alongside air testing and EPCs
Request SAP Calculations
We make it easy to get your SAP reports sorted:
👉 Request a Quote
📞 Or call us on 01792 732 724
All reports are coordinated by Starki and delivered through qualified, accredited SAP assessors under our trusted supplier partnership.
Architects - Partner With Us
Looking for a reliable, fast, and professional testing provider for your clients?
Starki supports architects with:
Fast turnaround times
Bulk instructions
Fixed fees for easy disbursement
Professional indemnity cover in place
FAQ
Are SAP calculations required for every new build?
Yes. If you’re building a new home, you must provide SAP reports to Building Control to demonstrate compliance with Part L and to obtain an EPC.
Do I need SAP calculations for an extension?
You may need SAP calculations for an extension if it includes large areas of glazing or affects the building’s energy performance. We’ll advise based on your project.
What documents do I receive?
You’ll receive a design-stage SAP report, PEA, as-built SAP, and your EPC. All are suitable for submission to Building Control.
Can you work from my architect’s plans?
Yes, we just need your architectural drawings (plans, sections, elevations) and build spec. We’ll handle the rest.