Property Comparison Tool

Comparing real estate listings is harder than it looks. Each listing presents its own mix of price, size, rooms, age and carrying costs, and the human brain is bad at holding five homes in mind at once. Spreadsheets help, but they are slow to set up and easy to format wrong.

Property Comparison Tool turns the side-by-side comparison into a live table. Add each home as a column and type its numbers — price, square footage, bedrooms, bathrooms, lot size, year built, HOA and property tax — and the table rebuilds instantly with price per square foot, age, a normalized value score and best-in-class highlighting on every row. It is built for buyers weighing multiple offers, agents preparing a client shortlist, and investors screening deals.

Underneath the table is the context that makes the numbers meaningful — what price per square foot really tells you, why HOA and tax belong in the comparison, how the value score is constructed — plus guidance on reading the result. Everything runs in your browser; nothing is uploaded.

• Unlimited side-by-side columns: Add as many listings as you are comparing; each becomes a column in the live table.
• Rich per-listing fields: Price, square feet, bedrooms, bathrooms, lot size, year built, HOA per month and property tax per year.
• Derived metrics: Price per square foot and age are computed automatically so you never calculate them by hand.
• Normalized value score: A 0-100 rating blending price, size, rooms, lot, age, HOA and tax into one comparable number.
• Best-in-class highlighting: The strongest home on each row — cheapest, largest, newest, lowest carrying cost — is highlighted automatically.
• Quick best picks: One-glance callouts for lowest price, largest home, best price per square foot and newest build.
• Live updates: Edit any field and the entire table, score and exports recompute instantly.
• Three export formats: CSV for spreadsheets, JSON for software, plain text for reports.
• Private: No account, nothing uploaded, nothing stored.

1. Add your listings. Click Add property for each home you are comparing and give it a name.
2. Enter the numbers. Fill price, square feet, bedrooms, bathrooms, lot, year built, HOA and tax for each. Leave a field blank and it counts as zero.
3. Set the reference year. Use the current year for live listings, or a past year when comparing historical comps.
4. Read the table. Every metric is a row, every home a column. Highlighted cells are the best on that row.
5. Check the value score. The score column ranks overall value from the numbers entered — a starting point, not a verdict.
6. Copy or download. CSV for spreadsheets, JSON for code, plain text for a client email or report.

Example 1 — Two offers. Home A is $450,000 at 1,800 sq ft; Home B is $480,000 at 2,100 sq ft. The table shows B has the lower price per square foot and the higher value score despite the higher sticker price.

Example 2 — Hidden carrying cost. Two homes at the same $520,000 price look identical until HOA and tax columns reveal one costs $400/month more to carry — a difference that compounds over years of ownership.

Example 3 — Age vs price. A 1995 build and a 2018 build at similar prices show very different age values, which the score weights so the newer home ranks higher on that component.

Example 4 — Investor screen. Drop in six candidate rentals with price and square footage; sort mentally by price per square foot to flag the cheapest entry points before running deeper analysis.

Example 5 — Client shortlist. An agent pastes the comparison as plain text into an email so the buyer can see every trade-off in one place.

• See every trade-off at once: Price, size, rooms, age and carrying costs in one live grid instead of scattered listings.
• Stop hand-computing ratios: Price per square foot and age appear automatically as you type.
• Rank with the value score: A single 0-100 number summarizes which home offers the most for the money.
• Catch the hidden costs: HOA and property tax sit beside price so nothing sneaks through.
• Export the shape you need: CSV, JSON or plain text in one click.
• Free and private: No account, no watermark, nothing uploaded.