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About TriLumen Systems.

We build Sully and PermitLogic because we've seen what permit surprises and guesswork do to a good project, and to the business behind it.

Built by people who've done the work.

TriLumen Systems is an independent software company in northeastern Pennsylvania. We build practical tools for the trades, and for the people who hire them.

Our founder spent years in home-repair contracting. Again and again, he watched good projects stall for avoidable reasons: a permit nobody knew was needed, a setback discovered after the posts were set, a second and third trip to the store because the materials list was a guess. He also spent fourteen years in sales leadership and enterprise systems at a large home-furnishings retailer, leading ERP and logistics rollouts. Sully is the tool he wanted in the truck. PermitLogic is the system he wanted running the business.

Exposed rafters and framing on a porch roof under construction
Porch roof ceiling construction, 2020. Photo: NPS Photo, public domain, via Wikimedia Commons.
Sully, the AI guide in the Sully app, illustrated

Meet Sully, the app's AI guide.

Sully is an AI character: a plain-spoken, patient veteran contractor who walks you through your project one question at a time. Sully is not a real person.

  • What Sully doesReads your town's published rules first, explains them in plain words, sizes your materials and assembles your packet.
  • What Sully never claimsTo have built, inspected or approved anything. Your permit office decides.
  • How Sully talksShort sentences, specifics, jargon explained. Encouraging, never scary.

What we believe.

  • Your town's rules firstThe closest rule usually wins, so that's where we look first, and we label every rule with its source.
  • Honest gaps beat confident guessesWhen a rule isn't published, we say so and tell you who to call.
  • The office decidesWe help you prepare. We never pretend to replace the permit office, an engineer or an attorney.
  • No inflated claimsWe don't publish user counts, reviews or endorsements we don't have.
  • Respect for creatorsModel building code text is copyrighted. We link to it or paraphrase it, never paste it.

How we test.

We've tested hardest on towns close to home in Luzerne County, Pennsylvania, hand-reviewing reports against each town's own pages.

  • Designed for any U.S. townThe same town, county, state, model code ladder works everywhere.
  • Results depend on the townSome towns publish a great deal online, some very little. Reports show which is which.
  • Where we areSully is on the App Store for iPhone and runs on the web. PermitLogic is live for contractors at pro.permitlogicai.com.

Get in touch.

Questions, feedback, corrections or partnership inquiries: hello@permitlogicai.com. A person reads every message.

Get Sully on your iPhone.

Sully is on the App Store for iPhone. It also runs in your browser at sully.permitlogicai.com, with the same account.

Get Sully on the App Store Open Sully on the web