Mason AI

About Mason AI

Mason AI delivers AI plan review software purpose-built for the residential plan check process, with the reviewer kept firmly in control at every step. When Mason AI flags a code issue, it shows its reasoning so the reviewer can weigh the evidence rather than accept a black-box result. The platform holds full coverage of the California Energy Code, CPC, Title 24 Energy Standards, CWUIC, CMC, CalGreen, and CRC (Architectural), and clearly marks where local amendments or local preferences still require reviewer judgment. A working draft comment letter about sixteen comments on average is ready before the reviewer opens the file, formatted the way the office already works. Every comment stays fully editable down to the word, and nothing is added to the final letter without the reviewer's own click. That combination of AI plan check speed and human sign-off is how Mason AI helps teams move through residential review about 40% faster