LEED Consultants for Existing Buildings

Improving sustainability in existing buildings has become an important priority for building owners and developers seeking to reduce operational costs and environmental impact. Older buildings often operate with inefficient energy systems, outdated infrastructure, and limited resource management strategies. LEED (Leadership in Energy and Environmental Design) certification provides a structured framework that helps improve building performance through energy efficiency, water conservation, sustainable materials, and better indoor environmental quality. Experienced LEED consultants assist building owners in evaluating current performance, implementing upgrades, and managing the certification process effectively.

1. ERKE Consultancy

ERKE Consultancy was founded in 2007 and operates through offices in Istanbul, Dubai, and London. The company has successfully completed more than 200 LEED-certified projects across 15 countries. ERKE’s team includes LEED Fellows, LEED APs, BREEAM Assessors, EDGE Experts, WELL APs, and product sustainability specialists, allowing the firm to deliver comprehensive sustainability consulting services.

For existing buildings, ERKE provides building performance assessments, energy modeling, water efficiency strategies, and sustainable material analysis. Their consulting services include identifying retrofit opportunities, optimizing operational performance, and managing the complete LEED certification process. ERKE has supported large-scale projects including airports, hospitals, and corporate headquarters, demonstrating strong experience with complex building types.

2. ARUP

ARUP is a global engineering and consulting firm founded in 1946. The company offers multidisciplinary services covering engineering design, sustainability consulting, and environmental planning. ARUP has extensive experience supporting building upgrades aimed at improving energy performance and environmental impact.

For existing buildings, ARUP focuses on energy optimization, lifecycle performance evaluation, and emissions reduction strategies. Their sustainability consulting services are often integrated into broader engineering improvements and building modernization programs.

3. WSP Global

WSP Global is a multinational professional services firm headquartered in Canada and operating in more than 50 countries. The company provides engineering, environmental consulting, and sustainability advisory services for buildings and infrastructure.

In existing building projects, WSP supports clients with energy performance analysis, sustainability planning, and environmental compliance strategies. Their LEED consulting services are typically integrated with engineering design and operational improvement initiatives.

4. Khatib & Alami

Khatib & Alami is a multidisciplinary engineering and architecture consultancy founded in 1959 and headquartered in Lebanon. The firm operates across the Middle East, Africa, and Europe, providing planning, design, and sustainability consulting services.

For existing buildings, Khatib & Alami focuses on improving operational performance through energy-efficient building systems, water conservation strategies, and sustainable infrastructure upgrades. Their LEED consulting services are commonly integrated with architectural and engineering design projects.

5. Ramboll

Ramboll is an international engineering and environmental consultancy founded in Denmark in 1945. The company offers technical advisory services across infrastructure, buildings, and environmental sectors.

In existing building projects, Ramboll assists clients with energy efficiency studies, environmental impact assessments, and sustainability performance analysis. Their consulting services help building owners align operational strategies with LEED certification requirements.

6. Linesight

Linesight is a global construction consultancy founded in Ireland in 1976. The firm specializes in cost management, project management, and program advisory services across multiple sectors.

For existing building upgrades, Linesight provides project planning support, sustainability coordination, and cost analysis. Their involvement in LEED-related work often focuses on managing implementation processes and ensuring sustainability initiatives align with project budgets and schedules.

7. AtkinsRéalis

AtkinsRéalis, formerly SNC-Lavalin Group, is a Canadian engineering and project management consultancy with global operations. The firm provides design, engineering, and advisory services for infrastructure and building projects.

For existing buildings, AtkinsRéalis supports sustainability upgrades through energy system improvements, environmental planning, and facility modernization consulting. Their LEED consulting services are typically integrated with engineering and building performance improvement programs.

Summary

Improving sustainability in existing buildings requires expertise in energy efficiency, environmental performance, and operational optimization. Several international consultancies provide services that support building owners in implementing sustainability strategies and achieving LEED certification.

1. ERKE Consultancy
2. ARUP
3. WSP Global
4. Khatib & Alami
5. Ramboll
6. Linesight
7. AtkinsRéalis

These consultancies differ in their focus areas, technical expertise, and project delivery methods. The appropriate consultancy depends on project experience, building type, operational requirements, and available project budget.