[background image] image of landscape with rolling hills
Expert guidance in Energy efficiency, Decarbonisation and Building performance

🌿Specialist consultancy for Net Zero Carbon, Dynamic Simulation Modelling (DSM) analysis and Energy & Sustainability solutions across the UK and Europe.

ABOUT US...

🌿 BeLeaf Consulting is an independent consultancy committed to enhancing energy performance, ESG compliance, and Net Zero alignment within the built environment. We empower clients with strategic, technically sound guidance throughout an asset's lifecycle, ensuring long-term value and sustainability. We specialise in energy efficiency, decarbonisation and building optimisation, helping organisations understand and manage their energy and carbon risks. Our approach combines engineering expertise with cutting-edge tools like Dynamic Simulation Modelling (DSM), allowing us to deliver highly accurate, asset-specific insights. At BeLeaf Consulting, we align technical feasibility with financial return and environmental responsibility—turning ESG ambition into measurable results.

[background image] image of landscape with rolling hills

🌿Jose Alvarez Arregui, founder of BeLeaf Consulting, brings over 12 years of experience in energy efficiency and sustainability. He has led multidisciplinary teams as Head of Building Physics in top-tier consultancies and real estate firms across the UK and Europe.

FOUNDER & ACCREDITATIONS

🌿 Chartered Engineer (CEng)
🌿 LCEA & LCC (Level 5)
🌿 ESOS Lead Assessor
🌿 BREEAM Accredited Professional
🌿 NABERS UK Assessor
🌿 PassiveHaus European Designer
🌿 DEC Assessor
🌿 CSRD Fundamentals
🌿 RESET AP

SERVICES

image of analytics process flow

Decarbonise assets, optimise energy

Identify energy savings and cut carbon with expert audits and advanced modelling. We deliver actionable insights for cost-effective, sustainable asset management.

Learn more
image of entrepreneur working at desk (for a fintech company)

ESG strategy for lasting value

Build a robust ESG foundation and Net Zero plan for your assets. Navigate compliance, reduce risk, and drive long-term performance at every stage of the building lifecycle.

Learn more
image of entrepreneur working at desk (for a fintech company)

Dynamic Simulation Modelling (DSM)

Advanced energy modelling using IES software to assess building performance to deliver high- accuracy prediction to support compliance and provide insight into design or retrofit strategies.

Learn more
image of entrepreneur working at desk (for a fintech company)

Enhance building efficiency

Advanced energy auditing and simulation modelling to identify inefficiencies and deliver targeted energy-saving solutions.

Learn more
image of analytics process flow

Future-proof your assets-EPCs & MEES

Ensure your properties remain compliant, marketable and sustainable with tailored advice on MEES regulations and EPC certification.

Learn more
image of analytics process flow

PV Feasibility analyses

Feasibility analysis for rooftop solar PV installations. Includes shading analysis, yield simulation, cost-benefit and integration strategies for maximum ROI

Learn more

Decarbonise assets, Optimise energy

Our core expertise

Net Zero carbon pathway
Asset decarbonization strategies
Technical energy assessments / CRREM

Develop tailored decarbonisation roadmaps using CRREM alignment, costed action plans and ROI forecasting to enable informed decision-making on how to reduce energy demand and transition toward Net Zero goals.

We guide organisations in managing carbon and energy risks across the built environment. Our tailored services support  Net Zero alignment and asset value at every stage of the lifecycle.

From strategic planning to technical audits, we provide actionable insights and robust solutions. Our expertise includes regulatory readiness, energy modelling and decarbonisation pathways for diverse portfolios.

Work with us to future-proof your assets, meet evolving standards and achieve measurable value through sustainability.

ESG strategy for lasting value

Our core expertise

ESG & Net Zero planning
Asset decarbonization strategies
Energy Performance of building directive

From strategic planning to technical audits, we provide actionable insights and robust solutions, estimating the CAPEX required per intervention, modelling carbon savings and   energy reductions and calculating the payback and  business impact of each action

We guide organisations in managing carbon and energy risks across the built environment. Our tailored services support ESG compliance and asset value at every stage of the lifecycle.

Work with us to future-proof your assets, meet evolving standards and achieve measurable value through sustainability.

Our core expertise

dsm
oPERATIONAL ASSESSMENETS
PLANNING & COmpliance

Advanced energy modelling using IES software to assess building performance under various scenarios. Delivers high- accuracy predictions, supports compliance, and provides insight into design or retrofit strategies:

  • Steady State assessments
  • Operational NZC reports (TM54)  
  • Overheating (TM59 & TM52)
  • NABERS UK Pre-Assessments
  • Daylight and sunlight analyses
  • Energy &  Sustainability Statements  - Part L assessments (Energy & Sustainability related)
  • CRREM Assessments (Carbon Risk Real Estate Monitor)

Dynamic Simulation Modelling (DSM)

Our core expertise

DSM
OVERHEATING ASSESSMENTS /TM52 & TM49
Technical energy assessments / TM54

Advanced energy auditing and simulation modelling to identify inefficiencies and deliver targeted energy-saving solutions.

Accredited support with Design for Performance and In-Use Ratings under NABERS UK. Helps clients benchmark and improve operational energy efficiency and market credibility.

Leverage advanced modelling (DSM) for precise energy performance and scenario analysis.

ESOS  compliance for individual assets or portfolios. This includes data gathering, site audits, energy use profiling, and identification of cost-saving opportunities.

Enhance building efficiency

Future-proof your assets- EPCs & MEES

Our core expertise

EPC & MEES COMPLIANCE
PLANNING DESIGN AND ADVICE / Part l regulations

Detailed analysis of current EPC ratings with improvement pathways. Includes cost-effective energy measures to meet MEES regulations and manage compliance risk, ensuring future-proofed investments.

Ensure your properties remain compliant, marketable and sustainable with tailored advice on MEES regulations and EPC certification.

High-level feasibility analyses for rooftop solar PV installations. Includes shading analysis, yield simulation, cost-benefit calculations, and integration strategies for maximum ROI.

We analyse the existing asset's consumption to advise on proposed system area to optimise the installation to suit your needs.

Our core expertise

DSM
PV feasibility analyses

PV Feasibility analyses

Our core expertise

  • Delivered energy optimisation and carbon reduction strategies for multi-tenant office buildings and mixed-use schemes.
  • Assessed operational performance and created actionable Net Zero Carbon roadmaps using CRREM alignment and ROI-driven implementation plans.
  • Provided Part L compliance reports, EPC analysis, and sustainability statements for new build and refurbishment projects.

Residential & Student Accommodation

  • Led Net Zero Carbon audits and energy strategies for large-scale residential developments and student housing portfolios across multiple countries.
  • Developed implementation strategies aligned with client ESG goals and long-term asset value.
  • Addressed overheating risks, SAP compliance, lifecycle carbon reduction, and cost-effective interventions tailored to each building type.
  • Produced energy and thermal comfort studies for major airport terminals, including cooling load analyses and energy modelling under extreme climates.
  • Delivered full building performance assessments for rail stations, including daylight,  ventilation, and Part L compliance studies.
  • Used DSM tools to evaluate the feasibility of natural ventilation and passive design measures in high-occupancy transport environments.

Education, Government & Public Sector

  • Completed thermal comfort, daylight, and BREEAM assessments for various schools and university buildings, ensuring compliance and user wellbeing.
  • Provided building performance analysis for civic centres, military facilities and training environments—focusing on both new construction and retrofit.

Transport & Infrastructure

Commercial & Mixed-Use Developments

CASE STUDIES

  • 🌿Experts on DSM (IES VE) on all building types and sectors
  • 🌿Independent and client-focused approach
  • 🌿Over a decade of technical experience
  • 🌿Experts in ESG-aligned strategies &  NZC roadmaps
  • 🌿Holistic decision-making that balances compliance, tenant needs,lifecycle costs, and ROI

👉Our consultants deliver expert guidance in energy, ESG, and decarbonisation. We support clients throughout the building lifecycle with practical, actionable solutions for sustainable asset value.

LET'S COLLABORATE

👉 Are you a real estate consultancy, sustainability professional, or asset owner aiming to:
🌿Future-proof your portfolio
🌿Enhance ESG performance
🌿Maximise energy efficiency


👉 Contact us today to explore how we can support your goals.
🌐 www.beleafconsulting.com
📧
info@beleafconsulting.com
📞 +34 650213044
🔗
www.linkedin.com/in/jose-alvarez-arregui

WHY WORK WITH US?

image of educational workshops in progress (for a environmental conservation nonprofit)

Start your Net Zero journey today

Get started