Tucson Zillow Value Lens

A Chrome extension prototype for estimating future value, sale outcomes, and holding costs directly on Tucson-area Zillow listing pages.

Tucson Zillow Value Lens is a Chrome extension prototype for faster housing screening while browsing Tucson-area Zillow listings.

Instead of switching across spreadsheets, tax notes, and mortgage calculators, the extension injects a compact side panel directly into the Zillow page and estimates:

  • future value scenarios for 2 / 3 / 4 / 5 / 10 / 20 years
  • low / base / high sale-price range
  • estimated sale profit and ROI after selling
  • remaining mortgage balance and net sale proceeds
  • optional FIRPTA withholding toggle for foreign sellers
  • adjustable assumptions for down payment, mortgage rate, and appreciation potential
Real Zillow listing screenshot with the Tucson Zillow Value Lens extension panel.

The prototype is tailored for Tucson-area browsing and uses regional assumptions for neighborhoods and zip codes such as 85718, 85750, 85737, 85704, 85741, 85742, and 85749.

Highlights:

  • bilingual interface in English and Chinese
  • compact side panel designed for quick listing comparison
  • mortgage-aware sale and holding analysis
  • year selector to keep the UI compact
  • designed as a practical product-style prototype rather than a spreadsheet workflow

Access:

  • If you are interested in trying the extension, please contact me directly by email or LinkedIn.
  • The code and package are not publicly linked from this page.

Notes:

  • This is a prototype and uses heuristic page parsing rather than an official Zillow API.
  • Estimates are directional and should not be treated as legal, tax, or appraisal advice.
  • FIRPTA shown in the extension is modeled as withholding, not final tax liability.