Land drainage on Koh Samui
We create rainwater drainage routes for plots, roadsides and entrances. We dig channels and trenches, install pipes and adjust slopes to the planned layout.
We assess where water enters, where it collects and where it can drain. Most runoff on Koh Samui comes with the rainy season from October to December, so routes and slopes are sized for a downpour, not an average shower. We agree on the scope, materials, cost and terms before starting.
Drainage work we carry out
Drainage for low areas
We open a way out for water from low spots that flood after rain: a channel, a pipe or a slope towards an existing outlet. We show the solution on site after an inspection.
Channels and trenches
We dig open channels with a mini excavator where access is tight and with a heavier machine on larger plots, holding depth and fall to the set levels.
Pipes under roads and entrances
We install drainage pipes where a channel crosses a driveway, backfill the trench and reinstate the surface.
Slopes for surface runoff
We cut or fill selected areas so surface water runs towards the channels instead of standing by the house and the entrance.
Drainage before land filling
On waterlogged plots we open the channel first and let the water out, then bring in fill. That is how we prepared a boggy plot in Maenam: a channel, a pipe under the road, then fill.
Construction site drainage
Temporary channels and pipes for the construction period so work areas and access do not turn to mud in the rain and builders’ vehicles can get in.
What we consider when planning drainage
Samui’s rainy season
From October to December it can rain for days, and low or clay plots stay flooded for weeks. We look beyond the puddles to where water enters the site.
Buildings and access
We account for the house, entrance and work areas when choosing the drainage route.
Existing and future levels
We coordinate channels and pipes with the terrain and any planned land filling.
Need an estimate?
Send a photo of your site - we reply quickly with a price.
Recent projects
Examples of completed work for this service on Koh Samui.
Maenam, Koh Samui
Septic tanks, utilities and site leveling in Maenam
Septic tank installation, sewer and utility trenching, backfill and site leveling in Maenam. Worked with a compact excavator in tight spaces between finished villas - completed in 2-3 days.
View project
Nathon, Koh Samui
Pool pit excavation in Nathon, Koh Samui
Dug a pool pit to the client's specified dimensions in Nathon, near Coconut Museum Samui. Two days including rain delays - excavation done to spec, spoil hauled off site.
View projectDrainage work examples
Water runoff channel
How we carry out drainage work
Inspect the site
We assess water collection points, terrain, possible outlets and machinery access.
Agree on the work and price
We confirm the route, work and materials needed, then set out costs and terms before starting.
Excavate and install
We shape channels, dig trenches and install pipes to the planned layout. Additional work is discussed in advance.
Check the completed work
We check routes and levels against the plan, inspect pipe and channel outlets, and discuss access for future cleaning.
Services you can book together
Earthworks
Explore excavation, trenching, filling and other groundworks in one place.
Land leveling
Site grading, cutting and filling to the required levels and slopes.
Dump trucks and material delivery
Sand, gravel and soil deliveries, plus removal of material excavated from trenches.
Where water comes from and where it can go
Assessing drainage means looking at the full route from where water enters the site to its outlet. Alongside wet areas, we inspect nearby terrain, existing channels, pipes and entrances.
Depending on conditions, we may suggest an open channel, a pipe along part of the route, slope adjustments or a combination. If you have a drainage layout, we use it to discuss the scope and prepare an estimate.
We identify the outlet before excavation, taking neighboring plots and existing drainage into account. If there is no suitable outlet, we first discuss the limitations and possible options.
Land drainage questions
Get in touch
Call or message us - quick replies, equipment guidance and free job estimates.