top of page
Part-L Extension.png

You Are in Safe Hands – Compliance Without Compromise

SAP Calculations for Highly Glazed Extensions, Made Simple

At R&D SAPs, we are specialists in achieving compliance for highly glazed extensions – one of the most complex areas of building regulations. We bring extensive experience and deep knowledge to this field. We understand the challenges that come with large glass areas, and we know exactly how to make them compliant without sacrificing your vision. We will go the extra mile for our customers, ensuring they feel supported and confident throughout the process.

Navigating building compliance can be daunting, especially if your project has been halted by building control. We know the anxiety, frustration, and confusion that can come with trying to meet technical standards while bringing your vision to life. But you don’t have to face it alone. We are here to guide you, reassure you, and stand by you every step of the way, ensuring your project achieves compliance without unnecessary stress or excessive costs.

We Always Have a Pathway Forward

 

Even if you have poor drawings, missing information, or a complex situation, we have the experience to help. We offer a free, confidential telephone consultation where you can share your situation without any obligation. No matter how challenging your project seems, we will find a pathway to compliance. 

Keeping You Informed Every Step of the Way

We believe that peace of mind comes from knowing what’s happening. That’s why we keep you updated throughout the process. As soon as we know your project has passed compliance – even before the final report is drawn up – we will email or call you to relieve any anxiety. Our clients consistently praise this approach as an excellent service.

 

Why Choose Us?

✅ We Stand With You: We are not just a service provider – we are your partners in this journey. When you work with us, you have a team that genuinely cares about your project’s success.

✅ Complete Support from Start to Finish: From the moment you reach out, we are here to help. We will walk you through each stage, explain every detail, and provide you with the confidence you need to move forward.

✅ Expert Guidance Every Step of the Way: Our team combines technical expertise in SAP calculations with real-world, hands-on experience. We provide practical, cost-effective solutions without compromising your design.

✅ Myth-Busting Clarity: We cut through confusion, explaining the truth and giving you honest, straightforward answers to all your questions.

✅ No-Risk Guarantee – Your Peace of Mind: We are so confident in our ability to help you achieve compliance that if we cannot bring your project to compliance, we will refund the cost of our assessments. No fine print. No hidden conditions.

✅ Real-World Solutions That Work: We focus on practical, achievable compliance without unnecessary design changes or expensive alternatives. Your vision matters, and we will protect it

.

✅ We Have Time for You: No question is too small, no concern is ignored. We know that peace of mind is just as important as compliance, and we are here to provide both.

 

Understanding Overglazed Extensions

When a new or existing dwelling has a total area of openings (windows, roof windows, rooflights, and doors) exceeding 25% of the total floor area, it is considered an overglazed breach of the 25% rule as outlined in Approved Document Part-L of the Building Regulations. This scenario requires a specific process for Building Control approval to ensure compliance with energy performance requirements.

 

Why Homeowners Prefer Larger Windows and Bi-Fold/Trifold Doors

  • Unobstructed Views

  • Improved Natural Light

  • Flexible Indoor-Outdoor Living

  • Enhanced Aesthetics

  • Increased Property Value

 

 

 

 

 

Our Customer-Friendly Compliance Process

 

We know that navigating compliance can seem overwhelming, especially for homeowners. But don’t worry – we're here to make it simple for you. Our team specialises in compliance for highly glazed extensions, an area where many others struggle. With our expertise, we ensure your project meets all necessary regulations without compromising your vision – even when large glass areas are involved. We're here to support you at every step, making sure the process is as smooth and stress-free as possible.

Part L Compliance - Easy as 1-2-3!

✅ Step 1: We take a look at your extension plans (if any), or photographs to see if there is an obvious highly glazed 25% of extension rule breach. 

📄 Step 2: We handle the paperwork, we collect the information we need and sort out the documents to make sure everything is covered.

🏁 Step 3: You achieve compliance when we give you a report that shows you have passed  then you’re all set. Just share it with your building control, and you’re good to go!

 

Fast & Reliable Turnaround

Our typical lead times are just 2-3 days even for awkward extensions. For urgent situations, such as avoiding penalties or minimizing downtime on active projects, we offer a same-day priority service.

 

Ready to Get Started?

 

Don’t let compliance worries hold back your project. Even if you have no drawings or incomplete information, we can still help. Contact Part-L Today for a free, confidential telephone consultation, or email us, and let us guide you to success with confidence.

stretched_image.png

Head Office

Office 18 (OCDEA's)

63-65 Woodside Road, Amersham, Buckinghamshire, 

HP6 6AA

Enquiries

For any enquiries, questions, please call: 0800-999-1151 Anytime

bottom of page