Innovative Solutions for a More Sustainable Built Environment
Each project presents a unique set of requirements and performance targets. From affordable housing and high-end residences to schools and large-scale commercial developments, our approach to energy efficiency consulting is grounded in technical knowledge and aligned with current regulations.
Energy efficiency is a key factor in long-term building performance. By integrating sustainable practices early in the design process, we help reduce operational costs, improve occupant comfort, and support compliance with evolving California energy codes.
Since 2002, GEM has provided consulting expertise that reflects both current best practices and long-term environmental goals. We continuously monitor updates to Title 24, CALGreen, and other green building programs to deliver solutions that are both practical and forward-thinking.
Why Choose Gilleran Energy Management?
As one of the top sustainability consulting firms in California, we focus on clarity, collaboration, and long-term value. Our role is to support your design and development process with solutions that meet energy efficiency and sustainability goals without adding unnecessary complexity.
Here’s how we help you move forward with confidence:
Expertise in Green Building Programs and Energy Codes
We understand Title 24, LEED, GreenPoint Rated, and other certification programs inside and out. We’ll help you navigate them with ease.
Proactive Energy Efficiency Solutions
We troubleshoot issues before they become problems—and we’re always looking for ways to streamline the process and save you time.
Tailored Sustainability Planning
No two projects are alike. We tailor our strategies to fit your goals, budget, and timeline.
Reliable Support from Design Through Completion
When you work with us, you’re not just getting a consultant. You’re getting a partner who’s invested in your success.
Our Services
We provide energy and sustainability consulting services that enhance building performance, improve operational efficiency, and support long-term environmental goals.
We work with project teams to address everything from baseline energy compliance to ambitious targets like Zero Net Energy or all-electric design, providing the insight and tools needed to meet today’s expectations—and prepare for tomorrow’s.
Industries We Serve
Apartments & Subdivisions

Helping multi-family developments achieve sustainable, cost-effective energy solutions.
Elevate Your Project with Gilleran Energy Management
Gilleran Energy Management is recognized among the best energy and sustainability consultants in California. We work closely with architects, developers, builders, and public agencies to ensure that projects meet code requirements, function efficiently, and support long-term sustainability objectives.
If you’re seeking a reliable partner for energy efficiency consulting or green building design, we welcome the opportunity to support your goals.










