Detect Construction Activity from Space

Satellite-detected construction activity across multiple states. 11,000+ sites detected. Updated monthly at 10-meter resolution.

11,000+ construction sites detected across 6 states
Explore the Map → Get API Access ↓
See the Change
Before & after satellite imagery of real detections
Lancaster before - Feb 2024 Feb 2024
→
Lancaster after - Feb 2025 Feb 2025
Lancaster County — 10-acre warehouse construction
Lancaster before - Aug 2024 Aug 2024
→
Lancaster after - Sep 2025 Sep 2025
Lancaster County — New warehouse site preparation
Philadelphia before - Aug 2024 Aug 2024
→
Philadelphia after - Aug 2025 Aug 2025
Philadelphia — 54-acre residential subdivision
Pittsburgh before - Aug 2024 Aug 2024
→
Pittsburgh after - Aug 2025 Aug 2025
Pittsburgh — Golf course converted to subdivision
What is SubGrade?
Ground change intelligence from space, updated monthly.
🌍

Satellite-Powered Detection

We compare Sentinel-2 satellite imagery month-over-month to detect land clearing, grading, and new construction at 10-meter resolution. Live across 6 states, expanding nationwide.

⏱

Thousands of Permit Offices, One Search

Fragmented permit systems across thousands of municipalities. No single database aggregates site-level construction data. SubGrade does — from satellite imagery, not paperwork.

🎯

Verified with Before/After Imagery

Every detection includes on-demand before/after satellite imagery so you can visually confirm ground changes yourself. No black-box algorithms.

How it works
1

Acquire

Sentinel-2 satellite imagery captured every 5 days at 10m resolution

2

Compare

Automated change detection between baseline and current month

3

Classify

AI scoring filters construction from seasonal noise, clouds, and agriculture

4

Deliver

Results via interactive map, API, CSV download, or AI assistant (MCP)

Who it's for
Built for anyone who needs to know what's changing on the ground.
🚧

Construction Suppliers

Know where sites are breaking ground across your territory. Target sales to active construction zones detected directly from satellite imagery.

🌱

Environmental Agencies

Monitor land clearing, wetland disturbance, and unauthorized grading across entire regions from a single dashboard.

🏛

Local Government

Track unpermitted construction and land use changes. Verify compliance without windshield surveys.

📈

Real Estate & Development

Search every construction site across 6 states in one place — no permit requests, no fragmented databases, no municipal portals.

Currently covering multiple states. Expanding nationwide.

Pricing
Start detecting land changes today.
Free Trial
$0

Try the API with no commitment.

  • 100 API calls
  • Public search endpoint
  • Satellite imagery preview
  • Email support

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Most Popular
Pro
$49 /month

Full access for professionals and teams.

  • 1,000 API calls per month
  • Authenticated endpoint access
  • Before/after satellite imagery
  • CSV export
  • Priority support

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