BUILDMATH provides free browser-based calculators and planning insights for early real estate, construction cost, conversion, underwriting, area, parking, debt, and land-basis screening.
BUILDMATH was conceived, designed, and built by Jeehee Hong, a New York–registered architect with more than 20 years of experience across architecture, real estate, construction, and complex project delivery.
The platform translates professional planning logic into accessible browser-based tools that help users evaluate assumptions, compare early scenarios, and make more informed decisions before committing significant time and capital.
BUILDMATH is a planning-level decision-support website. The calculators are designed to make assumptions visible, compare early scenarios, and help users identify which questions deserve deeper professional review.
The tools are intentionally browser-based and fast. They are useful for early screening, but they are not a substitute for a licensed architect, engineer, contractor, cost estimator, attorney, accountant, appraiser, lender, broker, code consultant, or local authority review.
Outputs are early screening estimates based on user-entered assumptions and simplified logic.
Outputs are not bids, quantity surveys, appraisals, legal opinions, code determinations, or permit approvals.
Incorrect, optimistic, incomplete, or outdated inputs will produce unreliable results.
Final decisions should be reviewed by qualified professionals and local authorities.
