Mortar: Real Estate Deal Analyzer for Zillow

Open a Zillow listing. Mortar reads the numbers and tells you if the deal is worth it in seconds.

Mortar turns any Zillow listing into a rental property analysis in seconds, the cap rate, cash flow, and cash-on-cash return a real estate investor actually cares about, right on the listing, with no spreadsheet. Open a for-sale listing, click the Mortar icon, and it reads the property details straight off the page, the price, beds, baths, square footage, and address, then runs the numbers. No copying figures into a spreadsheet by hand. WHAT YOU GET, IN SECONDS -Estimated monthly cash flow -Cap rate -Cash-on-cash return -A clear, plain-English read on whether the deal is worth a closer look -The rent estimate driving the analysis, fully editable WHY MORTAR IS DIFFERENT -Honest, deterministic math. The numbers are calculated, not guessed by an AI. We don't inflate returns to make a deal look good. -Real local costs. Property tax and insurance are estimated by state, not a flat national average, so the verdict holds up in high-tax markets like Texas, Florida, New Jersey, and Illinois. -Edit the rent. Know the market better than the model? Type your own rent and every metric recalculates instantly. -Tunable assumptions. Set your own down payment, interest rate, and loan term and see the deal on your terms. WHO IT'S FOR Buy-and-hold rental investors, house hackers, BRRRR investors, out-of-state buyers, and agents screening single-family or small multifamily listings who want a fast, honest read on a rental property before spending an hour underwriting it. HOW IT WORKS 1. Open any Zillow listing detail page. 2. Click the Mortar toolbar icon. 3. Mortar reads the listing and runs the analysis. 4. You get the key investment metrics in a clean popup within seconds. FREE TO START Every account gets free analyses each month to try Mortar on real listings, no credit card required. Upgrade to Pro for unlimited analyses, buy-box scoring against your own criteria, saved deals, analysis history, and side-by-side compare. Operator adds a full pro-forma (buy-and-hold, BRRRR, flip, and short-term rental) with multi-year IRR, risk flags, your max allowable offer, and a one-page branded PDF deal memo. PRIVACY Mortar only runs on the Zillow listing you choose to analyze. It does not track your browsing, show ads, or sell your data. See our privacy policy for details. Mortar is software that provides estimates to help you screen deals. It is not financial, investment, or real-estate advice, and it is not an appraisal.