RE-SIM — Real Estate Deal Analyzer

Paste a property address and run comps, a mortgage, and a monthly P&L in a side panel.

Underwrite a rental property before you write the offer — without a spreadsheet and without leaving the tab you're on. Paste any property address into RE-SIM's side panel. It pulls comparable rents and sale prices, fills in the property's details, and then walks you through the deal one step at a time: rehab scope, acquisition costs, mortgage, monthly P&L, return on your cash, a 5-year forecast, and a single deal score at the end. HOW IT WORKS 1. Type or paste an address 2. Pick how you'd run the deal: BRRRR, buy & hold, or a flip. 3. Build the rehab scope line by line. The total flows straight into the acquisition math. 4. See every dollar of cash to close — down payment, lender closing costs, title fees, agent or wholesale fees, and rehab with a buffer. 5. Get the mortgage payment, CapEx reserves priced off component ages, a monthly profit-and-loss, and cash-on-cash measured against every dollar you actually put in. 6. Read the verdict: one score out of 100, the three ratios behind it, and sliders that show what offer price or rent would make the deal work. WHAT'S IN IT • Comparable rentals and sales near the address, with distance, days on market, and the confidence band behind each estimate • Local rental market statistics for the ZIP — average and median asking rent, rent per square foot, days on market, active and new listings, and rent by bedroom count • Sale history for the address, with listing and price events • Full PITI mortgage calculator, editable down payment, rate, term, tax and insurance • CapEx reserves estimated by component, not a flat percentage • Monthly P&L, ROI, and a side-by-side against leaving the same cash in the stock market • 5-year forecast anchored to the ZIP's own growth rate where it's published • A deal score with live what-if levers, and a bench to save deals to and compare later Every figure the extension estimates is editable. Type over any number and the whole analysis re-runs. FREE AND PAID RE-SIM works as a straight calculator for free — enter your own rent and price and get the mortgage, the P&L, the forecast, and the verdict, with no account and no network call. RE-SIM Pro ($5/month, includes 10 address lookups, then $0.50 each) fills the numbers in for you: comps, property details, local rental market data, and sale history pulled from the address. Accounts and billing are handled on our website; the extension only reads your subscription status. PRIVACY RE-SIM does not read web pages. There are no content scripts, no activeTab or scripting permission, and no host permissions for any listing site. The only property information it ever receives is an address you typed into the side panel yourself. Your own numbers stay on your device. Full policy: https://re-sim.lovable.app/privacy WHAT IT IS NOT RE-SIM is an analysis tool, not an appraisal, and not financial advice. Estimates are estimates — check them against your own diligence before you commit money to a deal.