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Sustainability Design

Engineering a Greener Future.
Built on Solid Science.

ppa Sustainability is integrated across every ppa project from inception. We deliver energy modelling, BREEAM assessments, overheating analysis, and renewable energy integration, helping clients achieve their environmental targets, meet regulatory requirements, and future-proof their assets. Our ISO 14001:2015 certification reflects our commitment to environmentally responsible engineering. 

Sustainability Design Overview

We provide a full range of sustainability and environmental engineering services, from early-stage energy strategy through to detailed compliance calculations. Using IES, Amtech, Hevacomp, and Pleiades software, our team produces accurate, defensible assessments that support planning submissions, building control sign-off, and client sustainability targets. 

ppa's sustainability service covers all building types and scales from high-end residential developments requiring Part L compliance through to large commercial and mission-critical facilities pursuing BREEAM Excellent ratings. We work closely with architects and project teams to ensure sustainability is embedded in the design from day one, not bolted on at the end. 

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Scope of Service

  • Energy performance modelling and Part L compliance (SBEM/SAP) 

  • BREEAM pre-assessment, design stage, and post-construction assessments 

  • Overheating risk assessment (CIBSE TM52/TM59) 

  • Renewable energy systems feasibility and integration design 

  • Carbon and energy reporting for planning and regulatory submission 

Energy Modelling & Compliance

  • Dynamic energy simulation using IES Virtual Environment 

  • SBEM and SAP calculations for Part L compliance 

  • Display Energy Certificate (DEC) and Energy Performance Certificate (EPC) support 

  • Daylight and solar gain analysis 

  • Fabric energy efficiency and U-value calculations 

BREEAM & Environmental Assessments

  • BREEAM pre-assessment and target rating strategy 

  • BREEAM Design Stage and Post-Construction Stage assessments 

  • Thermal comfort and overheating assessments (CIBSE TM52/TM59) 

  • Water efficiency strategy and consumption calculations 

  • Ecology, transport, and waste strategy coordination 

Renewable & Low Carbon Systems

  • Photovoltaic (PV) solar system feasibility and yield modelling 

  • Combined Heat and Power (CHP) system design and feasibility 

  • Ground source and air source heat pump system design 

  • District heating and energy centre feasibility studies 

  • Low carbon technology integration with MEP design 

Design Process

Concept & Feasibility

Early-stage energy strategy, target setting, and identification of sustainability assessment requirements (BREEAM, Part L, planning conditions). 

Schematic Design

Initial energy and thermal modelling runs to validate design assumptions. BREEAM pre-assessment and gap analysis to inform design decisions. 

Detailed Design

Detailed compliance calculations, BREEAM evidence compilation, and formal assessment submission. Renewable system sizing and specification. 

IFC Documentation

Final compliance reports, BREEAM certificates, and energy performance documentation issued as part of the project close-out and planning discharge package. 

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