Free roof measurement by address
Your first roof estimate —
before you climb.
Roof area, pitch and squares for any U.S. address in seconds, measured from the same public aerial LiDAR that engineers use. Free, no sign-up.
Preliminary measurement from public aerial LiDAR · U.S. addresses · No sign-up
- 372cities with verified LiDAR
- 43states covered
- Secondsto a first estimate
From address to roof numbers
Find the house
Search the address, use your location on site, or tap any roof on the satellite map.
We read the LiDAR
Laser returns that hit that roof in public USGS / NOAA surveys are fitted to roof planes to get the slope.
Get the first estimate
Roof area, pitch, squares and a material cost range for your state — ready for a phone quote.
RoofTap for iPhone · for roofing contractors
Quote faster. Climb when the job is real.
Qualify the lead and give a ballpark on the phone. When the homeowner says yes, open the full roof report — rebuilt from the roof’s own LiDAR points — and walk on with the numbers already in hand.
Download on the App Store- Tap any roof on the map for a quick preview and lead status
- Roof area, pitch, waste and squares to order
- Material quotes with your own prices
- 2D blueprint with ridge, hip, valley, eave and rake lengths
- 3D roof model — rotate it and inspect each facet
- Branded PDF reports, client links and route planning
Tap a roofQuick preview on the map
Roof analysisArea, pitch, waste, materials
2D blueprintEvery edge with its length
3D modelRotate and tap each facet
Free estimate vs. full report
| Free on this site | RoofTap app | |
|---|---|---|
| Roof area | Estimate + likely range | Facet by facet |
| Pitch | Predominant | Every facet |
| Squares | Before waste | With suggested waste |
| Ridges, hips, valleys | — | Lengths |
| 3D roof model & editor | — | Included |
| PDF report & client link | — | Included |
What the numbers are — and aren’t
Built on public data, with its limits stated plainly.
Data sources & accuracy- Measured, not guessed
- Pitch comes from laser points on the actual roof, not from a photo. Every result names its LiDAR survey year.
- Honest about gaps
- Surveys can be years old and trees can hide a roof. When the data isn’t good enough we say so instead of inventing a number.
- A first estimate
- Right for a phone quote or a bid range. Verify on site before you order material or sign a contract.
Roof measurements in 372 U.S. cities
- New York, NY
- Los Angeles, CA
- Chicago, IL
- Houston, TX
- Phoenix, AZ
- Philadelphia, PA
- San Antonio, TX
- San Diego, CA
- Dallas, TX
- Jacksonville, FL
- Austin, TX
- Fort Worth, TX
- San Jose, CA
- Columbus, OH
- Charlotte, NC
- Indianapolis, IN
- Seattle, WA
- Denver, CO
- Oklahoma City, OK
- Nashville, TN
- Washington, DC
- El Paso, TX
- Las Vegas, NV
- Boston, MA
Questions roofers ask
How do you measure a roof without going on it?
We use airborne LiDAR — laser scans flown over U.S. cities by the USGS 3D Elevation Program, NOAA and state agencies. Each scan records the exact 3D position of millions of points on rooftops. From the points that land on a building we compute the roof’s pitch and area.
How accurate is the free measurement?
The free result is a preliminary estimate: building outline times the measured slope, shown with a likely range. It is meant for a first estimate or a ballpark quote. The full report in the RoofTap app reconstructs every roof facet in 3D. Neither replaces an on-site inspection before you order materials.
Is it free?
Yes. The roof area, pitch and squares on this site are free, with no sign-up. The full 3D roof report, PDF export, client links and route planning are in the RoofTap iPhone app.
What is a roofing square?
A roofing square is 100 square feet of roof surface. A 2,400 sq ft roof is 24 squares. Material is usually ordered by the square plus a waste allowance for cuts, hips and valleys — typically 10–15% on a simple roof.
Why is my address not covered?
We only measure where public LiDAR exists and has passed our quality checks. Coverage is wide in most U.S. metro areas, but some places have no scan, an old or sparse scan, or a scan we are still validating. Heavy tree cover or a house built after the scan can also prevent a measurement.
Are the material prices a quote?
No. They are typical U.S. material-only prices per square, adjusted to your state’s price level (BEA Regional Price Parities). They exclude labor, tear-off, disposal, delivery and tax. Use your supplier’s prices for an actual bid.
Who is RoofTap for?
Roofing contractors, estimators and sales reps who want a first roof estimate before driving to the job — and homeowners who want to understand their roof before getting bids.
Ready for the full roof report?
3D roof model, every facet and edge, material quote and a PDF your client can open — on your iPhone.
Get RoofTap on the App Store