Part L Consultancy & BREL Photo Management

We ensure your project stays on schedule, securing first-time approvals and eliminating the need for costly reworks.

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About Us

Prevent Part L failures before building control inspection.

As a practice led by qualified Engineers and Building Surveyors, we provide the technical oversight required to de-risk developments and ensure regulatory certainty.

We help developers and design teams avoid late-stage Part L failures by identifying compliance risks early — at design stage, not after construction has locked in cost.

As an engineering-led Part L & BREL consultancy, we don’t just produce SAP outputs. We interrogate fabric specifications, junction details, and as-built evidence to ensure what’s designed can actually pass on site.

The result: fewer redesigns, no last-minute scrambling for credits, and a smoother sign-off process with Building Control.

How It Works

How We Prevent Part L Failure

Stop Part L failures in their tracks before building control even sets foot on-site. Ensure your project stays compliant by catching hidden risks early and securing approval without the stress.

Step 1

Design-stage risk review

Step 2

SAP strategy aligned to what can be built

Step 3

Evidence & BREL sign-off support

Design stage Risk Review

We carry out an early design-stage compliance review to identify Part L risks before they become expensive site problems. By analysing fabric performace, thermal bridging strategy, air-tightness targets, heating systems & renewables, we highlight where shcemes are likely to fail and provide clear, buildable solutions. This proactive approach allows design teams to optimise performance, reduce late-stage redesign, and protect programme certainity.

SAP Strategy aligned with what can be built

Our SAP Modelling is driven by construction reality, not theoretical performance. We develop compliance strategies based on proven build details, achievable air tightness levels, and practical material specifications – ensuring what is modelled can actually be delivered on site. This avoids the common trap of paper compliance, minimises remedial work, and ensures smooth progression from design to construction.

Evidence & BREL Sign-Off Support

We provide full support for BREL evidence capture and sign-off, including geotagged photographic auditing, construction-stage compliance tracking, and structured data management. Our systems ensure all required evidence is collected correctly, on time, and in line with Building Control expectations. This removes risk from the final certification stage and gives developers confidence that compliance will be achieved.

Our Services

Empowering a Sustainable Built Environment.

Residential Part L (SAP)

Design-stage modelling and fabric optimisation for SME developers.

Commercial Part L (SBEM)

Technical energy strategy and compliance for new-build commercial assets.

BREL PHOTO Management

Managed digital site audits and geotagged evidence for smooth Building Control sign-off.

Frequently asked questions

1. Who decides whether Part L passes or fails?

Building Control make the final determination on compliance. Our role is to ensure the SAP, fabric specification, thermal performance and BREL evidence are technically robust, internally consistent, and presented in a way Building Control can sign off without challenge or delay.

2. Is SAP compliance just a calculation exercise?

No. Under Part L 2025/26, compliance is increasingly determined by buildability, thermal detailing, and evidence quality. A “passing” SAP model that cannot be evidenced on site will still fail at sign-off. Our approach aligns modelling assumptions with what is realistically constructed and documented.

3. At what stage should we appoint a Part L consultant?

Ideally at design stage, before specifications are fixed. Early involvement allows us to identify high-risk junctions, over-optimistic assumptions, and unnecessary renewable requirements before they become costly to change during construction.

4. Why do projects fail Part L even when the SAP shows a pass?

Common causes include missing or incorrect BREL photographic evidence, changes to specification not reflected in the SAP, default thermal bridging values being exceeded on site, and air-tightness assumptions that cannot be achieved in practice.

5. Do you work directly with Building Control and site teams?

Yes. We regularly liaise with designers, contractors, and Building Control bodies to resolve technical queries, clarify evidence requirements, and ensure the compliance narrative is clear from design through to final sign-off.