Precast concrete is the construction method we use for the structural shell of our residential and mixed-use builds. Walls, structural panels and stairs are cast off-site at a controlled-conditions facility, cured to dimensional specification, and delivered to the plot ready to install, typically in days, not weeks.
The approach is widely used in northern Europe, Singapore and Japan, and increasingly in the higher-spec residential and hospitality builds across Southeast Asia. We adopted it because the construction reality of Phuket (a long monsoon, a deep range of trade quality across subcontractors, and an industry that defaults to cast-in-place concrete on site) makes precast the single most reliable way to keep an ambitious build on its programme.
This page is the public version of the briefing we issue to our owners. It explains why we work this way, what it means for programme and quality, and what the typical month-by-month build looks like.
Each of the four advantages below is a problem precast solves on a Phuket build. Together they are why a project running precast typically clears its first 45% of completion before a cast-in-place equivalent has its slabs cured.
Drone overflight of an active KAHLI Hillside Villas batch, precast wall and stair panels craned into position alongside completed structural roofing.
The chart below shows the typical month-by-month progress of a single villa from the day construction begins on the plot. The schedule includes generous contingency for weather and supply, it represents the longest-case build, not the shortest.
Deep-driven piles establish the foundation footprint and load-bearing pile caps. The first physical step on your plot.
Reinforced ground beams tie the piles together. Soil treatment for termite and pest protection is applied before slabs are poured.
Precast walls and stairs are delivered and craned into position. This is the stage that drives the dramatic month-two progress jump.
First-fix piping, cables, electrical conduit and drainage are installed within the structural shell. Largely internal, visible site progress slows.
Roof framing, insulation and tiling complete the weathertight envelope. Once the roof is on, internal finishing accelerates.
Interior tiling, ceiling installation, and Japandi-inspired joinery and woodwork begin transforming the structure into a home.
Glazing and door installation complete the building envelope and bring natural light and the mountain views into the interior.
Final finishes, architectural detailing, built-in cabinetry and the loose furniture package installed and styled.
Snagging walk-through, final inspection, owner orientation, and the formal handover of keys.
The 15-month contract window for a precast development like KAHLI's hillside is generous by design. It absorbs weather, supply and sequencing variability across the entire 19-villa programme, so any individual handover date stays predictable and protected.
The contract window for a complete batched programme. Absorbs cross-site sequencing, rain delays, and supply variability.
Once a plot's batch begins, the villa progresses from piling to handover within roughly eight months, including built-in contingency.
Foundations and structural panels in place. Weather has had almost no opportunity to delay the critical path.
Villas built in batches of four, sharing crane access, crew rotation and factory delivery slots, staggered across the 19-villa hillside.
Precast is the reason a build of nineteen villas across one hillside is a programme we can underwrite rather than a wish. The factory cures it, the crane lifts it, the crew assembles it, and the rain doesn't stop it. Two months in, the building is half done. That's two months a traditional contractor in this market hasn't even broken ground on.
Nineteen villas under construction on a single hillside in Cherngtalay, every typology delivered on the precast programme described on this page.
Read the case study→