U-Builder is a free design tool that helps installers of all experience levels get projects moving quickly.
With integrated support, you don’t need to be a master to create an accurate layout, generate a bill of materials or custom engineering report, or to download CAD drawings. Whether you’re planning for a residential or commercial rooftop or exploring new system configurations, U-Builder gives you the power to design with confidence.
Using real site data, Google Maps imagery, and code-specific criteria by zip code, you can point, click, and instantly scale your designs across single or multiple arrays. You can adjust module orientation, fine-tune module/array placement, orientation, and preferences, pull full engineering reports or create a Bill of Materials quickly. With integrated support and seamless HelioScope® compatibility, U-Builder streamlines your workflow from first concept through deliverables; making it easier than ever to move projects forward.
ZERO COST TO YOU
U-Builder is free for everyone to use. Start designing today. No startup costs or hidden fees.
BOM GENERATION
Get a detailed breakdown of what components you need and exact quantities to order with options to adjust your BOM for quote customization.
ENGINEERING REPORT
Review building/roof information, array module counts and total array area, array ballast map, racking weight, design load calculations and maps.
CAD EXPORT
Export your layout as a professional, editable design file that plugs into your workflow.
STATE CERTIFICATION LETTERS
Export State Certification letters to comply with your specific jurisdiction requirements.
collaborative design environment
Create and save each project design in your account and share with anyone from your organization. Additionally, project profiles can be saved for reuse to speed up your quoting process for like projects.
choose your u-builder experience
fast bom & layout creation
choose go if you…
Need a Bill of Materials fast
Are creating a budgetary estimate or initial customer quote
Have only basic project information, such as the installation address, roof type, and module selection
Want a simplified workflow with fewer inputs
Need to generate BOMs quickly for multiple projects
engineering & permit design
choose PRo if you…
Need a complete engineering design
Require permit-ready construction documents
Want to optimize the system based on site-specific conditions
Have detailed project information, such as setbacks, building height, and roof characteristics
Need engineering calculations and code-compliant documentation
Video Tutorial
Video Tutorials
explore unirac’s Plan Set services
U-Builder gives you the tools to design with confidence at no cost, but when you want to move faster, eliminate bottlenecks, and free up your team’s time, Unirac’s Plan Set Services team is standing ready to serve as your white glove partner.
Our in-house specialists handle the heavy lifting including full utility and AHJ-ready plan sets, professional electrical and battery design, and complete engineering documentation such as CAD exports, rafter diagrams, state certification letters, and PE stamps in all 50 states. Paid plan set support means you receive professional engineering deliverables fully prepared for you, helping you scale without adding headcount, protects your margins, and keeps projects moving smoothly all the way to installation.