Homeowners pay contractors for half-finished work, then the crew vanishes and no end date is on paper
One homeowner lost an estimated 70,000 to 80,000 baht when a fence contractor walked away half done after the owner also paid for the remaining materials; the contract had no completion date and the mesh was not the brand claimed. Another says a contractor finished about 90 percent, then went unreachable for two days. A thread on why this is common blames owners who can't judge material specs and slow enforcement.
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5 ways to tackle it
Web portal
Milestone Contract Builder: pay when the photo proves it
The page builds a contract with scope, a materials list, an end date and stage payments tied to photo proof. The owner prints it and both sign before the first baht moves.
Build with Next.js, Claude, PDF generator, PromptPay QR
Camera and vision
Material Check: photograph the mesh, wire or label and compare with the contract
The owner photographs delivered materials and their labels. Claude vision reads brand, gauge and grade and compares them with the contract's materials list. A fence mesh that was not the brand claimed gets flagged on delivery, not three weeks later.
Build with Claude vision, Thai OCR, PWA
Hardware and sensors
Site Cam: a cheap solar camera that snaps the site at 8 AM and 5 PM every day
An ESP32-CAM on a pole photographs the work site twice a day and posts the photos with timestamps to the owner. The owner sees when the crew showed up and how far the work really is, and a crew that vanishes leaves a clear record.
Build with ESP32-CAM, solar panel, LiPo battery, Wi-Fi or SIM, simple gallery page
AI agent
Quote Sanity Agent: compare three quotes line by line
The agent reads PDF or photo quotes, normalizes items and flags missing work and unit prices far from the others. It shows the cheapest quote leaving out the footing, so a low price is not misread as a good one.
Build with Claude, PDF and photo upload
Data and maps
Contractor Record Book: finished on time or not
Owners add job type, price, whether the contract had an end date and whether it finished. Others search by contractor name or phone before hiring, with a QR on finished jobs so the next neighbor can add theirs.
Build with Next.js, Supabase, QR yard sign PDF
What people reported
Homeowner's fence contractor finished half, owner paid for the remaining materials, contractor became unreachable; estimated loss 70,000 to 80,000 baht; contract had no completion date; claimed mesh brand was denied by the company.
pantip.comOwner says contractor finished about 90 percent, about 10 percent unpaid, and has been unreachable by phone and LINE for two days; asks whether to terminate and whether photos and a police diary entry are enough.
pantip.comThread asking why construction abandonment is so common; commenters cite owners unable to judge specs, inflated withdrawals, underbidding and slow civil enforcement.
pantip.com