Part L Upgrade Risk Screener

TGD Part L 2021 — Conservation of Fuel & Energy Obligations

L-PL-001 v1.15.2

Legacy Business Engineers

Building & Works Information

Building Type ?What: Determines TGD Part L benchmark and NZEB requirements
Typical: Office, Hotel, Retail, Healthcare
Source: Planning permission / project brief

Proposed Works Type ?What: Type of works — determines which Part L requirements apply
Typical: New Build = full NZEB | Major Renovation = NZEB where feasible | Minor works = existing standards
Source: Building Control submission
⚠ Major renovation (>25% building envelope) triggers NZEB requirements

Year Built ?What: Construction year — determines baseline fabric and services performance
Typical: Pre-2005 = pre-EPBD | 2005–2019 = Part L 2005/2008 | 2020+ = NZEB
Source: Property records / BER certificate

Current BER Rating ?What: Building Energy Rating — baseline for compliance gap assessment
Typical: A/B = near-compliant | C = moderate gap | D+ = significant intervention
Source: SEAI National BER Register
⚠ BER C3 to NZEB typically requires €40–80/m² in fabric + systems upgrades

Heating System Age (years) ?What: Age of primary heating plant — affects efficiency and replacement need
Typical: Boiler life: 15–20 yrs | Heat pump: 20–25 yrs | AHU: 15–20 yrs
Source: Asset register / maintenance records
⚠ Systems >15 yrs should be assumed for replacement in compliance strategy

Building Envelope Condition ?What: General condition of external fabric (walls, roof, glazing)
Typical: Good = post-2005 or recently upgraded | Fair = intact but poor U-values | Poor = visible defects
Source: Condition survey or BER certificate
⚠ Poor envelope makes heat pump conversion uneconomic without fabric-first approach

Gross Floor Area (m²) ?What: Total floor area — used to benchmark kWh/m² and cost estimates
Typical: Small: <2,000 m² | Medium: 2,000–10,000 m² | Large: >10,000 m²
Source: Architect's area schedule

Part L Screening Results

Part L Obligations Triggered

Requirement	Trigger	Applies?	Cost Impact

Key Risks

⚠️ Indicative screening result only — based on profile and benchmark inputs, not site measurements, formal BER assessment, or NEAP/SBEM energy calculation. Part L obligations depend on specific project details that require professional review. All outputs should be verified by a qualified MEP engineer and BCAR-assigned certifier before use in any decision-making process.

What this means:

What this tool cannot tell you:

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Got the answers? Here's what to do next

This tool provides screening-level guidance. For a building-specific review of the systems, condition, upgrade pathway, and likely compliance strategy — send us what you have. We'll confirm scope and fee within 4 hours.

S3 Performance Audit / Energy & Carbon Strategy | 10–15 working days | From €8,000 + VAT

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