Hillside construction in Koh Samui | Ancra Engineering
Koh Samui • Slope Protection • Structural Engineering
PRECISION HILLSIDE CONSTRUCTION
We mitigate the risks of steep terrain development. From geotechnical stability and retaining walls to luxury finishing, Ancra delivers asset-grade villas that withstand the elements.
Geotech First
Soil shear testing and deep foundation piling tailored to island granite and clay composition.
Permit Mastery
Navigating strict 80m/140m zoning and PLO environmental regulations for steep slopes.
Logistic Power
Agile supply chains that overcome ferry delays and steep, inaccessible access roads.
Slope Safety
Advanced drainage and retaining systems designed for monsoon-level water loads.
ENGINEERING THE IMPOSSIBLE
The most lucrative views in Koh Samui come with the highest risks. Building on slopes exceeding 30 degrees requires more than a standard contractor; it demands an engineering partner.
Ancra specializes in the intersection of structural safety and architectural beauty. We don’t just build villas; we engineer hillside assets that survive the monsoon season and thrive in the rental market.
- ✓ Retaining Wall Design: Gravity, cantilever, and anchored systems.
- ✓ Water Management: Sub-surface drainage to prevent soil liquefaction.
- ✓ Corrosion Control: Marine-grade steel and additives for coastal longevity.
SCOPE OF DELIVERY
Structural & Shell
For developers with their own fit-out teams.
- Site clearing & earthworks
- Retaining wall systems
- Concrete structure & roofing
- Waterproofing envelope
Design-Build Turnkey
The complete solution. From concept to key.
- Architectural design
- Permitting (IEE/Building)
- Full construction & MEP
- High-end interior fit-out
Rescue & Remediation
Fixing stalled or unsafe projects.
- Slope stabilization audit
- Structural reinforcement
- Drainage correction
- Project completion
THE CRITICAL PATH
Feasibility
Topographical survey, soil tests, and zoning checks.
Design & Permit
IEE submission and structural engineering approval.
Construction
Earthworks, retaining walls, shell, and MEP installation.
Finishing
Installation of glazing, joinery, and pool systems.
FAQ
How do you handle materials logistics on steep Samui roads?
We utilize a combination of specialized 4WD transport, localized staging areas, and crane-lift systems where access is restricted. Our logistics planning accounts for load limits and ferry schedules to prevent timeline slippage.
What is your approach to slope stabilization?
We engineer retaining walls based on specific soil shear tests, not guesswork. Our drainage systems are over-engineered for “100-year storm” scenarios, directing water away from foundations to prevent hydrostatic pressure buildup.
Can you handle the PLO and hillside permitting process?
Yes. We navigate the specific 80m, 140m, and slope-degree zoning regulations of Koh Samui. We manage the environmental documentation (IEE) required for sensitive hillside developments.
Do you offer a warranty on structural works?
Absolutely. We provide industry-leading structural warranties, backed by rigorous QA checks during the foundation and piling phases.
SECURE YOUR INVESTMENT
Don’t gamble on the hillside. Partner with the engineering team that understands the terrain, the permits, and the luxury standard.
UPDATED: DECEMBER 9, 2025 | CONTACT: ANCRA2022@GMAIL.COM
TAGS: LUXURY VILLA DESIGN-BUILD, MONSOON-READY VILLA BUILD, PLO ZONING SAMUI, RETAINING WALL CONSTRUCTION, SAMUI STEEP TERRAIN ARCHITECTURE, SLOPE PROTECTION ENGINEERING THAILAND