11/05/2026
In surveying, “due diligence” means carefully verifying land boundaries, titles, and technical descriptions to ensure accuracy, legality, and compliance with standards before any transaction or development proceeds. In the Philippines, this involves checking DENR-approved survey plans, conducting relocation surveys by licensed geodetic engineers, and confirming that the title’s technical description matches the actual ground situation.
---
🔍 What Due Diligence in Surveying Involves
1. Verification of Technical Description
- Every land title contains a technical description: bearings, distances, lot number, plan number, and area.
- This must match:
- DENR-approved survey plan (Land Management Services records).
- Tax declaration area.
- Physical boundaries on the ground.
2. Relocation Survey
- Conducted by a licensed geodetic engineer (per Republic Act 8560, Philippine Geodetic Engineering Act of 1998).
- Involves re-establishing boundaries using reference monuments and DENR-approved bearings/distances.
- Ensures the lot on paper matches the lot on the ground.
3. Document Review
- Check for:
- Planning permissions and building regulations.
- Warranties and maintenance records (for built properties).
- Encumbrances (mortgages, easements, liens).
4. Physical Inspection
- Inspect structures, boundaries, and improvements.
- Confirm no encroachments or overlaps with neighboring properties.
5. Technical Analysis
- Assess construction materials, drainage, utilities, and environmental risks.
- Identify defects or deficiencies that may affect property use.
---
📑 Practical Application in the Philippines
- Before buying land: Verify that the title’s technical description matches DENR records and ground reality.
- For developers: Ensure subdivision surveys comply with DENR tolerances (e.g., ±20 cm linear tolerance, closure error 1:10,000).
- For geodetic engineers: Always use calibrated instruments and DENR-approved survey forms.
---
⚠️ Risks if Due Diligence is Ignored
- Boundary disputes with neighbors.
- Invalid titles if survey plans don’t match DENR records.
- Legal rejection of survey returns by the Land Management Bureau.
As a Geodetic Engineer, due diligence means:
- Always cross-check title descriptions with DENR survey plans.
- Conduct relocation surveys for clients before purchase or development.
- Document findings in a comprehensive survey report with recommendations.
