About Mortgage Data Labs
Our mission is to bring transparency and analytical accuracy to the homebuying process. Unlike traditional calculators that default to generic figures, Mortgage Data Labs utilizes actual, localized transactional benchmarks to show you how borrowing really works in your county.
HMDA Ingestion Engine
We process millions of anonymous lending records from the Home Mortgage Disclosure Act (HMDA) database to compile down payment percentages and loan amounts for individual US counties.
Localized Insights
By mapping average local tax assessments and regional borrowing metrics, our tools pre-populate inputs so you can review a realistic local owning cost profile immediately.
Why Local Data Matters
When choosing a mortgage, standard guidelines recommend budgeting 1% for property taxes and assuming a 20% down payment. However, in reality:
- Property taxes in states like New Jersey average over 2.2%, while in Hawaii they sit under 0.3%.
- Average down payments for first-time buyers and FHA program participants are frequently under 5%, while conventional buyers average 10% to 15%.
- Local FHA limits change year-to-year depending on local home valuation averages.
Mortgage Data Labs helps bridge this gap. By loading individual county pages (e.g. for conventional or FHA borrowing), our calculators analyze this historical record to configure your starting interest rates, local property tax weights, and median loan size automatically.
Our Data Policy
We believe you shouldn't have to trade your financial confidentiality for education. That's why Mortgage Data Labs does not require user accounts, email sign-ups, or social logins to use our services. All computational processes take place locally within your browser, ensuring your private calculations never leave your computer.
Have feedback on our calculations, or noticed a discrepancy in your county's profile? Please drop us a line on our Contact Page.