The Home Performance Extensible Markup Language (HPXML) Data Dictionary and Transfer Standard are open data standards created to support a growing industry by facilitating communication and the exchange of information and data on residential building and energy performance. HPXML is published by the Building Performance Institute and managed by a diverse group of industry experts in program administration, implementation, software development, research, and government.

Benefits of Standardization

Industry Efficiency

Improve industry efficiency by reducing the costs of collecting and exchanging data between market actors.


Facilitate quicker and more automated transfer of information across a diverse set of market actors.

High Quality Research

Standardize terminology and collect higher quality data as a means of tracking and quantifying work completed in the industry.

Tools + Resources

Data Dictionary

Defines terms and field formats for the energy efficiency industry

Transfer Standard

Requirements for a standard XML data transfer protocol

HPXML Validator

Validate your HPXML files against the schema and its datasets

Implementation Guide

Learn how to integrate HPXML into your work streams and products


Presentations and webinars on HPXML implementation and more

Data Selection Tool

Understand how your data needs align with HPXML

News + Updates

News and updates about HPXML and related industry standards

Working Group

Working group activities and how to become involved