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Buildings Data and Tools

NREL offers data and tools to help consumers, manufacturers, researchers, and utilities construct energy-efficient and cost-effective buildings.

These resources include standardized product data and findings, whole building simulation programs, machine-learning software models, and capabilities to help users identify ways to improve energy efficiency and make the grid more efficient, resilient, and reliable.

A 3-d model of a large, multi-wing commercial building.


The Building Energy Optimization (BEopt™) tool evaluates single-family detached and multifamily building designs and identifies the most cost-effective whole-house efficiency packages to achieve zero energy. The tool analyzes new construction and existing home retrofits, evaluating single building designs, parametric sweeps, and cost-based optimizations.


EnergyPlus® is the Building Technology Office’s state-of-the-art open-source building energy modeling (BEM) simulation engine. It provides the detailed and validated physics-based algorithms needed by building designers and researchers to accurately model whole-building system energy performance to inform integrated design, early-stage and advanced R&D, standards, policy, and investment decision-making. The EnergyPlus® simulation software provides a robust and reliable simulation engine that can be embedded inside critical workflows, ensuring it meets the requirements of researchers, designers, users, and policymakers.


foresee™ uses machine-learning algorithms, advanced data analytics, and physics-based modeling and simulation to derive data-driven appliance models and energy use patterns within a home and predict future energy consumption while coordinating the operation of connected appliances. This secure home automation system takes occupants' personal habits and priorities into account and automatically creates energy-saving scenarios homeowners can comfortably implement.


The OpenStudio® platform is a collection of open-source software tools that brings together physics-based BEM, large-scale computing capabilities, and data science tools to enable a broad range of building energy analysis applications. The platform includes a software development kit for programmatic access to BEM engines including EnergyPlus®, support for scripting and workflow automation called OpenStudio Measures, prototype building models and standards-related model transformations via the OpenStudio Standards gem, and large-scale simulation analyses on local, cluster, and cloud resources via the OpenStudio Server.

ResStock Analysis Tool

The ResStock™ Analysis Tool identifies which home improvements save the most energy and money for cities, states, municipalities, utilities, and manufacturers. This tool processes data from supercomputer simulations with a statistical model of housing stock characteristics as well as large public and private data sources.

Technology Performance Exchange

The Technology Performance Exchange™ provides consumers, manufacturers, vendors, modelers, researchers, and utilities standardized product data to facilitate and improve assessments and comparisons of building-related products. This is a centralized, web-based portal for finding and sharing information on cost-effective, energy-efficient technologies.


The URBANopt (Urban Renewable Building And Neighborhood optimization) advanced analytics platform supports the design and optimization of urban districts and helps plan the integration of high-efficiency, sustainable energy technologies community-wide.